Novatek-Electro OB-216 Documentation

Novatek-Electro OB-216 Documentation

https://www.overvis.com/docs/en/ob-216/

2026-07-30

Table of Contents

1. 1. Novatek-Electro OB-216
2. 2. Quick Start and Application Setup
3. 3. OB-216 Operating Manual
4. 4. OB-216 Modbus Interface Reference
5. 5. Firmware Update
6. 6. Firmware Downloads
7. 7. Additional Software

Novatek-Electro OB-216 Documentation

Novatek-Electro OB-216 The OB-216 is a digital input/output module manufactured by NOVATEK-ELECTRO LTD. It provides versatile measurement and control capabilities via RS-485 and USB interfaces using the Modbus protocol, with analog output functionality. Complete Documentation Available View all documentation on a single page – Perfect for printing or offline reading Key Features Remote DC voltage measurement (0–10 V) Remote DC current measurement (0–20 mA) Temperature measurement with analog sensors NTC (10KB), PTC 1000, or PT 1000 Temperature and humidity measurement with digital sensors DS18B20, DHT11, DHT21/AM2301, DHT22 Pulse counter with memory storage (discrete, voltage, or current modes) Dry contact input state tracking (logic input) Analog output (0–10 V voltage or 0–20 mA current) RS-485 and USB communication interfaces Modbus RTU/ASCII protocol support Common Use Cases Remote sensor data acquisition and control Industrial process monitoring with analog outputs Building automation I/O expansion Environmental monitoring and HVAC control Laboratory measurement and control systems Documentation Getting Started Quick Start and Application Setup – Initial connection, mode selection, and step-by-step procedures for every supported input and sensor Operating Manual – Complete specifications, installation, wiring, operation, safety, and maintenance information Modbus Interface – USB and RS-485 configuration, Modbus RTU/ASCII protocol details, and register reference Advanced Features Firmware & Updates – Firmware versions, update procedures, and release notes Software Tools – Download utilities for testing and configuration Resources OB-216 Product Page – Full product information and specifications One-Page Documentation – Complete documentation on a single page for printing OB-216 Full Manual (PDF) – Complete operating manual Support Knowledge Base: Browse this documentation for detailed guides and references Support Center: Visit our Support Center for FAQs and troubleshooting Report an Issue: Submit a support ticket for technical assistance

Novatek-Electro OB-216 Documentation

Quick Start and Application Setup This guide takes the OB-216 from an unpowered installation to a verified Modbus reading. It also shows which input, operating mode, settings, and result register belong together for each supported application. Read the safety instructions first Before installing the OB-216, read the safety precautions in the operating manual. Make or change terminal connections only while the OB-216, sensors, and connected equipment are de-energized. Understand the device before wiring Terminals serve one function at a time The OB-216 is a single-channel, configurable device. Its terminals can be used for different applications, one at a time. It is not possible to perform all of them at the same time. Connect one input source or sensor at a time. Select one input operating mode in register 100. The input terminals used (and result register address) depend on that mode. The voltage and current analog outputs are two forms of the same output channel. Configure only the required output type. USB and RS-485 are alternative communication interfaces. With factory settings, connecting USB selects USB and disables RS-485 until the USB connection is removed. USB does not replace the device power supply Power the OB-216 from an isolated 10–30 V DC supply connected to its power terminals. The microUSB connection is used for communication with a PC. Choose the input application Use this table before connecting anything. Application Input terminals / diagram Register 100 / Mode of operation Register 101 / Plugged-in digital sensor Additional settings Read the result at 0–10 V sensor IO1, Figure 2(b) 2, meas. voltage Optional: 104–105, 130–134 Measured value 6; converted value 16 0–20 mA sensor IO1, Figure 2(a) 3, meas. current Optional: 104–105, 130–134 Measured value 6; converted value 16 NTC 10KB IO2, Figure 2(c) / sensor connection diagram 4, NTC sensor (10 KB) Optional: 102, 104–105 Measured value 6 PTC 1000 IO2, Figure 2(c) / sensor connection diagram 5, PTC1000 sensor Optional: 102, 104–105 Measured value 6 PT 1000 IO2, Figure 2(c) / sensor connection diagram 6, PT1000 sensor Optional: 102, 104–105 Measured value 6 DS18B20 Figure 3 8, digital sensor 0, DS18B20 Optional: 102–105 Temperature 11 DHT11 Figure 3 8, digital sensor 1, DHT11 Optional: 102–105 Temperature 11; humidity 12 DHT21 / AM2301 Figure 3 8, digital sensor 2, DHT21 / AM2301 Optional: 102–105 Temperature 11; humidity 12 DHT22 Figure 3 8, digital sensor 3, DHT22 Optional: 102–105 Temperature 11; humidity 12 Dry-contact state IO2, Figure 2(d) 1, LOG input Register 107: debounce Status register 2:3, bit 18 Dry-contact or transistor pulses IO2, Figure 2(e) 0, pulse counter Registers 106–108 Counter 4:5 Voltage pulses IO1, Figure 2(f) 11, counter pul. voltage Registers 104–106, 108 Counter 4:5 Current pulses IO1, Figure 2(f) 12, counter pul. current Registers 104–106, 108 Counter 4:5 No sensor, remote manual output IO1 / IO2 unconnected 1 The wiring figures referenced above are reproduced in the relevant procedures below. The complete register definitions are in OB-216 settings and Additional Registers. Initial connection and configuration What you need OB-216 and the supplied microUSB cable Galvanically isolated 10–30 V DC power supply 35 mm DIN rail to mount the OB-216 on 0.5–3.0 mm² conductors, ferrules, and suitable tools The one sensor, contact, pulse source, or analog load required by the application Twisted-pair cable for RS-485, if used A Windows PC with the Control Panel OB-215/OB-216 application The NOVATEK USB-SERIAL driver, if Windows does not recognize the USB interface De-energize before wiring Disconnect power from the OB-216 and all connected circuits before inserting, removing, or moving any conductor. Tighten terminal screws to 0.4 N·m. Select the application Find the required application in the table above. Record the operating-mode value for register 100, the connection figure, any additional settings, and the result register. This avoids configuring one mode while wiring another. Mount and wire the OB-216 Mount the device on a 35 mm DIN rail. While all circuits are de-energized, connect the isolated 10–30 V DC supply and then connect only the sensor or signal source for the selected application. Do not connect a digital sensor, a 0–10 V source, a 0–20 mA source, and a temperature sensor simultaneously. They are alternative uses of the input. Connect the PC for initial setup Connect the microUSB cable between the OB-216 and the PC. Install the NOVATEK USB-SERIAL driver if the interface is not detected, then start Control Panel OB-215/OB-216. Apply power and establish communication Apply 10–30 V DC power. The power indicator flashes for approximately 1.5 seconds during startup. At factory settings, the OB-216 automatically selects USB when the cable is connected. Factory communication settings are: Setting Factory value Modbus protocol RTU Modbus unit ID 28 Baud rate 9600 bit/s Parity / stop bits No parity, 2 stop bits Interface selection Automatic Set the input mode and application parameters Set register 100 to the value selected in the application table. Configure the sensor type, thresholds, debounce, scaling, or output settings required by that procedure. Save the settings Write 18220 to command register 50. The OB-216 saves the settings to flash memory, restarts, and begins operating with the new configuration. Caution Changing settings without sending the save command leaves status-register bit 29 set, and the changes may be lost after power removal. Verify the measurement locally Read register 0; the expected device identifier is 28. Then read the result register listed for the application. Check the relevant status bit where applicable. Do not proceed to a controller or production network until the locally read input value is plausible. Move to RS-485, if required Remove power, disconnect the USB cable, and connect the RS-485 twisted pair: A is the non-inverted signal and B is the inverted signal. Reapply power and configure the Modbus master to exactly match the OB-216 protocol, unit ID, baud rate, parity, and stop bits. USB and RS-485 dependency In automatic interface mode (register 113 = 0), a connected USB cable makes the OB-216 use USB and turns off RS-485. Disconnect USB before testing RS-485. Alternatively, set Data interface register 113 to 1 for RS-485 only or 2 for USB only, save, and restart. Application procedures 0–10 V sensor (PLC / VFD output or other transmitter) Use this procedure for a sensor whose output voltage is within 0–10 V. De-energize all equipment and wire the voltage source as shown in Figure 2(b). Confirm that the source cannot exceed the OB-216 supply voltage. For correct measurement of high input values (near 10V), a 12V-24V supply is recommended. Set register 100 to 2 (that is Mode of operation = meas. voltage). If required, set the upper threshold in register 104 and lower threshold in register 105. These affect status bits 20 and 21 only, reporting values outside these thresholds. Save settings by writing 18220 to register 50 and allow the OB-216 to restart. Read register 6. Voltage uses hundredths of a volt, so the value would be in 0-1000 range: 500 means 5.00 V. If unit conversion is required, set register 130 to 1 and configure registers 131–134 with the input and converted ranges. Read the scaled result from register 16, then save the settings again. Example — 0.5–8 V pressure sensor representing 1–25 bar: set registers 131–134 to 50, 800, 1, and 25. Read pressure from register 16. Use 10 and 250 if a single fractional digit is required, etc. 0–20 mA sensor or transmitter De-energize all equipment and wire the current loop as shown in Figure 2(a). Check the sensor documentation to determine whether an external loop supply is required. For correct measurement of high input values (near 20mA), a 12V-24V supply is recommended. Set register 100 to 3 (that is Mode of operation = meas. current). If required, set the upper threshold in register 104 and lower threshold in register 105. These affect status bits 22 and 23 only, reporting values outside these thresholds. Save settings by writing 18220 to register 50 and allow the OB-216 to restart. Read register 6. Current uses hundredths of a milliampere, so the value would be in 0-2000 range: 450 means 4.50 mA. If unit conversion is required, set register 130 to 1, configure registers 131–134, and read the scaled result from register 16. Save the settings again. Example — 4.5–20 mA pressure sensor representing 1–25 bar: set registers 131–134 to 450, 2000, 1, and 25. NTC 10KB, PTC 1000, or PT 1000 analog temperature sensor De-energize the OB-216 and connect one analog temperature sensor using Figure 2(c) and the sensor connection diagram above. Set Mode of operation register 100 according to the sensor: 4 for NTC 10KB, 5 for PTC 1000, or 6 for PT 1000. If a known temperature correction must be applied, set register 102 in tenths of a degree. For example, 5 adds 0.5 °C and -5 subtracts 0.5 °C. Optionally set the upper and lower temperature thresholds in registers 104 and 105. These affect status bits 24 and 25 only, reporting values outside these thresholds. Save settings by writing 18220 to register 50 and allow the OB-216 to restart. Read the temperature from register 6 as tenths of a degree Celsius: 234 means 23.4 °C. DS18B20 digital temperature sensor De-energize the OB-216. Connect one DS18B20 as shown above. Install an external 2–5.1 kΩ pull-up resistor between the sensor Data line and its supply line. Set register 100 to 8 (that is Mode of operation = digital sensor) and digital-sensor register 101 to 0 (DS18B20). If a known temperature correction must be applied, set register 102 in tenths of a degree. For example, 5 adds 0.5 °C and -5 subtracts 0.5 °C. Optionally set the upper and lower temperature thresholds in registers 104 and 105. These affect status bits 24 and 25 only, reporting values outside these thresholds. Save by writing 18220 to register 50 and allow the OB-216 to restart. Wait at least 3 seconds for a sensor poll, then read temperature from register 11 in tenths of a degree Celsius. DHT11, DHT21 / AM2301, or DHT22 sensor De-energize the OB-216. Connect one DHT sensor as shown in the digital-sensor wiring diagram. Install an external 2–5.1 kΩ pull-up resistor between the sensor Data line and its supply line. Set register 100 to 8 (that is Mode of operation = digital sensor). Set register 101 to 1 for DHT11, 2 for DHT21 / AM2301, or 3 for DHT22. Select with register 103 the parameter used for thresholds and automatic-output operation: 0 for temperature or 1 for humidity. This selection does not prevent reading both available measurements. If a known temperature correction must be applied, set register 102 in tenths of a degree. For example, 5 adds 0.5 °C and -5 subtracts 0.5 °C. Optionally set the upper and lower thresholds in registers 104 and 105. These affect status bits 24 and 25 (for temperature selection) or 26 and 27 (for humidity selection) only, reporting values outside these thresholds. Save by writing 18220 to register 50 and allow the OB-216 to restart. Wait at least 3 seconds. Read temperature from register 11 in 0.1 °C and humidity from register 12 in 0.1% RH. For example, humidity value 800 means 80.0% RH. Dry-contact state input De-energize the OB-216 and connect the dry contact to IO2 as shown in Figure 2(d). Set register 100 to 1 (that is Mode of operation = LOG input). Set Contact bounce suppression in register 107 to a value in range 1-250 ms (if the factory value of 10 ms is unsuitable). Save by writing 18220 to register 50 and allow the OB-216 to restart. Read the 32-bit status value from registers 2:3. Bit 18 is 1 when IO2 is closed and 0 when it is open. Pulse counter Choose the pulse mode that matches the signal source: Pulse source Register 100 / Mode of operation Maximum frequency Thresholds Dry contact / discrete signal on IO2 0, pulse counter 200 Hz Not used Voltage pulses on IO1 11, counter pul. voltage 10 Hz Registers 104–105 Current pulses on IO1 12, counter pul. current 10 Hz Registers 104–105 De-energize the OB-216 and wire the source as shown in Figure 2(e) for a discrete signal or Figure 2(f) for voltage/current pulses. If a discrete source has a PNP output, install the external 1–5.1 kΩ resistor shown in Figure 2(e). Set register 100 to 0, 11, or 12 according to the table above. Set register 106 to 0 for leading edges, 1 for trailing edges, or 2 for both edges. For mode 0 (pulse counter), set the Contact bounce suppression in register 107. For modes 11 and 12, set the upper and lower detection thresholds in registers 104 and 105. These are used for pulse detection, with a valid pulse alternately crossing both thresholds. Set register 108 to the number of input pulses represented by one counter increment. Changing register 108 clears stored counter values. If a non-zero starting count is required, write it to 32-bit registers 4:5. Save by writing 18220 to register 50 and allow the OB-216 to restart. Generate known pulses and read the 32-bit count from registers 4:5. Counter storage The counter is saved to flash once per minute; a value accumulated for less than one minute may be lost if power is removed. Analog output The analog output can operate in one of two modes: automatically follow the selected input; manually set by Modbus. Required output Register 150 / Work permit Full-scale register maximum value Additional settings 0–10 V automatic 1, voltage - auto 1000 = 10.00 V Input range 153–154, output range 155-156 0–20 mA automatic 2, current - auto 2000 = 20.00 mA Input range 153–154, output range 155-156 0–10 V manual 3, voltage - manual 1000 = 10.00 V Converting manual values 152, optionally conversion ranges 153–156 0–20 mA manual 4, current - manual 2000 = 20.00 mA Converting manual values 152, optionally conversion ranges 153–156 Automatic output First configure and verify the input application. Set register 150 to 1 for voltage or 2 for current. Set the input range in registers 153–154 and corresponding analog output range in registers 155–156. For example, to convert 4-20 mA sensor into 0-20 mA, use 400 and 2000 for registers 153–154, and 0 and 2000 for registers 155–156. Save by writing 18220 to register 50. Read register 17 and measure the physical output to verify the conversion. Manual output Set register 150 to 3 for voltage or 4 for current. For direct values, set register 152 to 0, then write the required output to register 151. For example, 500 produces 5.00 V or 5.00 mA according to the selected output mode. For scaled control, set register 152 to 1 and configure the input/output ranges in registers 153–156 before writing the command value to register 151. For example, to convert 1.0-25.0 bar range into 0.5-8 V, use ranges 10 and 250 for registers 153–154, and 50 and 800 for registers 155–156. Write the pressure value in tenths of a bar to register 151. Save the mode and conversion settings by writing 18220 to register 50. Set the register 151 (Manual control value) and verify the output with a suitable meter before connecting the final load. Caution Confirm the receiving equipment’s accepted voltage/current range before enabling the output. An incorrect range or output type can damage connected equipment. Connect the load to the current output (Figure 1, terminal 9) or voltage output (Figure 1, terminal 10), together with analog ground (terminal 8). Read the safety instructions first Connect the external load to only one output: voltage or current, but not both. Verification checklist Before considering setup complete, verify all of the following: Only the intended single sensor or signal source is connected to the input. Register 100 matches the wiring and sensor type. Register 101 matches the digital sensor, if used. The result is read from the correct register and interpreted with the correct scale. The value is plausible when tested at two known input points or states. Settings were saved by writing 18220 to register 50. Status bit 29 is 0, indicating settings are saved. USB is disconnected before RS-485 testing in automatic interface mode. The Modbus master matches unit ID, protocol, baud rate, parity, and stop bits. Each device on a multidrop RS-485 network has a unique unit ID. Only the intended single load or signal input is connected to the output. Troubleshooting Q: Why is there no communication over USB? A: Confirm the 10–30 V supply is present, install the USB-SERIAL driver, and check that register 113 is not forced to RS-485 only. Q: Why is there no communication over RS-485? A: Disconnect USB, check A/B polarity, and make sure the unit ID, protocol, baud rate, parity, and stop bits match. Check that register 113 is not set to USB only. Q: Why does the reading never change? A: Confirm that register 100 matches the wiring, verify that you are reading the correct result register, and check the sensor power and common connection. Q: Why does the digital sensor have no valid reading? A: Confirm that register 100 is set to 8 and register 101 matches the sensor. Install the 2–5.1 kΩ pull-up resistor and wait at least 3 seconds for a reading. Q: Why is the analog value incorrect by a factor of 10 or 100? A: Apply the register scaling shown in the relevant application procedure. Make sure you distinguish raw register 6 from converted register 16. Q: Why is the threshold status unexpected? A: For DHT sensors, check register 103. Also check the upper and lower values and their units in registers 104–105. Q: Why do new settings disappear after power loss? A: Write 18220 to register 50 to save the settings, then verify that status bit 29 becomes 0. Q: Why is the pulse count too high or too low? A: Check edge selection (register 106), debounce (register 107), pulses per increment (register 108), the frequency limit, and the thresholds for voltage or current pulse modes. Reference Operating Manual — complete specifications, installation, operation, and wiring diagrams OB-216 settings register table — all configurable parameters and valid ranges Status register — operating mode and alarm bits Command and additional registers — save, restart, measured values, and counters

Novatek-Electro OB-216 Documentation

OB-216 Operating Manual NOVATEK-ELECTRO LTD Intelligent industrial electronic DIGITAL INPUT/OUTPUT MODULE OB-216 OPERATING MANUAL Quality control system on the development and production complies with requirements ISO 9001:2015 Dear customer, Company NOVATEK-ELECTRO LTD. thanks you for purchasing our devices. You will be able to use properly the device after carefully studying the Operating Manual. Keep the Operating Manual throughout the service life of the device. UKRAINE, Odesa — www.novatek-electro.com 1 Purpose Digital input/output module OB-216 (hereinafter referred to as the Device or OB-216) can be used as: remote DC voltage meter (0 – 10 V); remote meter of direct current (0 – 20 mA); remote temperature meter when connecting an analog sensor NTC (10KB), PTC 1000 or PT 1000; remote temperature or humidity meter when connecting a digital sensor DS18B20, DHT21, DHT22 or AM2301; counter of impulses with saving the result in memory. OB-216 provides: monitoring the state (closed / open) of the contact at the input of the «dry contact» type; issue of an analog signal (0 - 10 V, 0 - 20 mA) at the analog output. RS-485 or USB interfaces provide control over the Modbus protocol of devices connected to the analog output (Figure 1, pos. 9, 10), reading sensor readings, setting device parameters. The control is carried out using the program “Control Panel OB-215/OB-216” or other software supporting the MODBUS protocol. Power supply of the device and data exchange are indicated by indicators on the front panel (Figure 1, pos. 2, 3). The overall and mounting dimensions and controls of OB-216 are shown in Figure 1. Note Temperature sensors are not included in the delivery set. 1 – microUSB connector; 2 – data exchange indicator; 3 – power supply indicator; 4 – terminals for RS-485 connection; 5 – terminals for power supply; 6 – terminal for restarting the device; 7 – terminals for connecting sensors; 8 – terminal “ground” of the analog output; 9 – current terminal 0 - 20 mA analog output; 10 – voltage terminal 0 - 10 V analog output. Figure 1 – OB-216 front panel and overall dimensions 2 Terms and Abbreviations Modbus – standard, packet communication protocol based on “client-server” technology for industrial electronic devices; Modbus RTU – device communication protocol, through which the packet is transmitted byte by byte; Modbus ASCII – device communication protocol through which a packet is transmitted in the form of ASCII characters; RS-485/EIA-485 – network standard for communication of devices via twisted pair; Twisted pair – a pair of insulated conductors in a cable, twisted together to reduce distortion of transmitted signals; W/R – write/read; Indicator – a single LED indicator; R – reading. 3 Complete Set Item Quantity OB-216 1 pcs. PC connection cable (microUSB) 1 pcs. Operating manual 1 pcs. Packaging 1 pcs. 4 Technical Specifications Main Technical Characteristics Parameter Value DC supply voltage 10 – 30 V Number of connected sensors 1 DC voltage measurement error in the range 0 - 10 V ≤ 1% DC current measurement error in the range of 0 - 20 mA ≤ 1% Temperature measuring range (NTC 10KB) –25…+125 °C Temperature measuring range (PTC 1000) –50…+120 °C Temperature measuring range (PT 1000) –50…+250 °C Maximum pulse frequency in the «Pulse counter/Logic input» mode 200 Hz Maximum pulse frequency in the «Voltage/current pulse counter» mode 10 Hz Maximum voltage supplied to the input «IO1», «IO2» no more supply voltage Number of outputs 1 Output voltage range 0 – 10 V Output voltage error 0.5 % Output current range 0 – 20 mA Output current error 0.5% Ready time ≤ 2 s Maximum power consumption ≤ 1 W Communication interfaces RS (EIA/TIA)–485, USB Data exchange protocol Modbus MODBUS RTU / ASCII Nominal operating mode long lasting Weight ≤ 0.07 kg Overall dimensions, H×W×L 90×65×18 mm Cross-section of conductors for connection 0.5 – 3.0 mm² Screw tightening torque 0.4 N·m Device protection degree IP20 Electric shock protection class III Climatic performance NF 3.1 Permissible degree of pollution II The device maintains its performance at any position in space Installation (mounting) – DIN rail 35 mm Body material – self-extinguishing plastic The device meets the requirements of the following: EN 60947-1; EN 60947-6-2; EN 55011; EN 61000-4-2 Harmful substances in amounts exceeding maximum permissible concentrations are not available Modbus settings For configurable parameters, valid ranges, and register addresses, see OB-216 Settings. Temperature Measurement Error When Using Analog Sensors 5 Operation Conditions The device is intended for operation in the following conditions: Ambient temperature: from minus 35 to +45 °С Atmospheric pressure: from 84 to 106.7 kPa Relative humidity (at temperature of +25 °С): 30 … 80 % If the temperature of the device after transportation or storage differs from the ambient temperature at which it is supposed to be operated, then before connecting to the mains keep the device under the operating conditions within two hours (because of condensation may be on the product elements). ATTENTION The device is not intended for operation in the following conditions: Significant vibration and shocks High humidity Aggressive environment with content in the air of acids, alkalis, etc., as well as severe contaminations (grease, oil, dust, etc.) 6 Connecting Device Start with the application guide For a step-by-step path from initial USB setup to a verified measurement, including a selection table for every supported sensor and input mode, see Quick Start and Application Setup. SAFETY All connections must be made with the de-energized device! An error during installation work can damage the unit and appliances connected to it. For reliable contact, it is necessary to tighten the terminal block screws with force of 0.4 N·m. When the tightening torque is reduced, the junction may heat up, the terminal block may melt and the wire may catch fire. With an increase in the tightening torque, it is possible that the threads of the terminal block screws are broken or the wire to be connected is pinched. Analog Measurement Mode Wiring Diagram Figure 2 – Analog measurement mode wiring diagram Wiring Diagram for Operation with Digital Sensors Figure 3 – Wiring diagram for operation with digital sensors 1. Connect the device in accordance with Figure 2 (when using the device in the mode of measuring analog and discrete signals) or in accordance with Figure 3 (when using the device with digital sensors) and check the correct connection. To connect the device to the Modbus network, use a twisted pair cable of Cat.1 category or higher. Note Contact «A» for transmitting non-inverted signal, contact «B» – for inverted signal. ATTENTION The power supply unit of the device must be galvanically isolated from the main energy supply system. 2. Check the correct connection according to Connecting Different Types of Sensors and the diagrams in Figure 2 or Figure 3. Connecting Different Types of Sensors 7 Use of Device After power is applied, the indicator « ⏻ » flashes for 1.5 s, then the indicators « ⏻ » and «RS-485» (Figure 1, pos. 2, 3). After 0.5 s, the «RS-485» indicator goes out. During data exchange, the «RS-485» flashes, otherwise the indicator does not light up. To configure the device, use the program «Control Panel OB-215/OB-216» (available at website www.novatek-electro.com in the «Software» section) or other software compatible with the Modbus RTU/ASCII. The program connects to the device via USB or RS-485 interface. Note When connecting the device via the USB interface, you need to download the NOVATEK USB-SERIAL Driver located at website www.novatek-electro.com in the «Drivers and utilities» section and install it on your PC. At the factory setting, the device automatically switches to the USB interface when the cable is connected. The RS-485 interface is turned off while the USB interface is used. Note When changing the OB-216 settings, they must be saved into memory by a command written to the Modbus register (Command Registers, address 50, value «18220»). After that, the device will save the settings, automatically restart, and then work with the new settings. 8 Device Operation Pulse Counter (Discrete Signal) Connect an external device according to Figure 2 (e). Configure the device for operation in the pulse counter mode for counting discrete signals (OB-216 Settings, address 100, value 0). Select the pulse detection algorithm in the Pulse counter mode register (address 106). In this mode, the device counts the number of pulses at the «IO2» (input with a duration not less than the value specified in the OB-216 Settings, address 107, the value is specified in ms). The data is saved into memory with a frequency of 1 minute. If the device was switched off before 1 minute has elapsed, the last stored value will be restored when switched on. Upon reaching the value indicated in the register (address 108), the counter is incremented by one (Additional Registers, address 4:5). To configure the initial value of the pulse counter, write the required value into the register (Additional Registers, address 4:5). Then the counter will count pulses from the entered value. When changing the value in the register (address 108), all stored pulse counter values will be deleted. Note If the external device has a PNP type output, for correct operation of the OB-216, it is necessary to connect an external resistor (nominal from 1 kΩ to 5.1 kΩ) in accordance with Figure 2 (e). Impulse Counter (By Voltage) Connect an external device according to Figure 2 (f). Configure OB-216 to operate in the pulse counter mode for counting voltage pulses (OB-216 Settings, address 100, value 11). Select the pulse detection algorithm in the Pulse counter mode register (address 106). Set the thresholds registers (addresses 104, 105) to specify the upper and lower voltage thresholds at which the pulse will be counted. In this mode, the device counts the number of voltage pulses in accordance with the set thresholds. If the voltage value changes within the upper and lower thresholds, the device will not register these pulses. The number of impulses is saved to memory every minute. If the device was switched off before 1 minute has elapsed, the last stored value will be restored when switched on. Upon reaching the value indicated in the register (address 108), the counter is incremented by one (Additional Registers, address 4:5). To configure the initial value of the pulse counter, write the required value into the register (Additional Registers, address 4:5). Then the counter will add pulses to the initial value. When changing the value in the register (address 108), all stored pulse counter values will be deleted. Impulse Counter (By Current) Connect an external device according to Figure 2 (f). Configure OB-216 to operate in the impulse counter mode for counting current impulses (OB-216 Settings, address 100, value 12). Select the pulse detection algorithm in the Pulse counter mode register (address 106). Set the thresholds registers (addresses 104, 105) to specify the upper and lower current thresholds at which the impulse will be recorded. In this mode, the device counts the number of current impulses in accordance with the set thresholds. If the current value changes within the upper and lower thresholds, the device will not register these impulses. The number of impulses is saved to memory every minute. If the device was switched off before 1 minute has elapsed, the last stored value will be restored when switched on. Upon reaching the value indicated in the register (address 108), the counter is incremented by one (Additional Registers, address 4:5). To configure the initial value of the impulse counter, write the required value into the register (Additional Registers, address 4:5). Then the counter will add pulses to the initial value. When changing the value in the register (address 108), all stored impulse counter values will be deleted. Logic Input Connect the device according to Figure 2 (d). Configure it for operation in the «Logic input» (OB-216 Settings, address 100, value 1). When the logical state at the «IO2» terminal (Figure 1, pos. 7) changes to a low level, the device will set bit 18 (Additional Registers, address 2:3) equal to 1. When the logical state at the «IO2» terminal (Figure 1, pos. 7) changes to a high level, the device will reset bit 18 (Additional Registers, address 2:3) equal to 0. Voltage Measurement Connect the device according to Figure 2 (b). Configure it to operate in the «Voltage measurement» (OB-216 Settings, address 100, value 2). The Measured value register (Additional Registers, address 6) will display the voltage measured at the «IO1» (Figure 1, pos. 7). If the device has to indicate overvoltage (or undervoltage), the corresponding thresholds should be set (OB-216 Settings, addresses 104, 105). Write the upper threshold value to register 104 and lower threshold value to register 105. When the voltage value exceeds the threshold, the corresponding bit will be set to «1» (bit 20 – voltage value above the upper threshold, bit 21 – voltage value below the lower threshold) (see Additional Registers, address 2:3). Voltage Measurement with Value Conversion To convert the measured voltage to another value, turn on the conversion (OB-216 Settings, address 130, value 1) and set the conversion ranges (addresses 131 – 134). For example, the measured voltage needs to be converted to pressure bars with the following sensor parameters: a voltage of 0.5 V corresponds to a pressure of 1 bar; a voltage of 8 V corresponds to a pressure of 25 bar. Configure the conversion ranges as follows: minimum input value (address 131, value 50 which corresponds to 0.5 V), maximum input value (address 132, value 800 corresponds to 8 V), minimum converted value (address 133, value 1 corresponds to 1 bar), maximum converted value (address 134, value 25 corresponds to 25 bar). The converted value will be output to a Converted value register (Additional Registers, address 16). Voltage Measurement with Analog Voltage Output To output the measured voltage to the analog voltage output, select the analog voltage output (OB-216 Settings, address 150, value 1). Check the load connection for the voltage output (Figure 1, pos. 10). Set the conversion ranges (OB-216 Settings, registers 153-156). For example, to convert a measured voltage in the 1 V to 10 V range to a voltage in range of 0 V to 5 V: write the minimum input voltage value into the register with address 153 (100 corresponding to 1 V); write the maximum input voltage value into the register with address 154 (1000 corresponding to 10 V); write the minimum output voltage value into the register with address 155 (0); write the maximum output voltage value into the register with address 156 (500 corresponding to 5 V). The converted analog value will be output to a Converted analog value register (Additional Registers, address 17). Voltage Measurement with Analog Current Output To output the measured voltage to the analog current output, select the analog current output (OB-216 Settings, address 150, value 2). Check the load connection for the current output (Figure 1, pos. 9). Set the conversion ranges (OB-216 Settings, registers 153-156). For example, to convert a measured voltage in the 1 V to 10 V range to a current (4 mA to 20 mA range): write the minimum input voltage value into the register with address 153 (100 corresponding to 1 V); write the maximum input voltage value into the register with address 154 (1000 corresponding to 10 V); write the minimum output current value into the register with address 155 (400 corresponding to 4 mA); write the maximum output current value into the register with address 156 (2000 corresponding to 20 mA). The converted analog value will be output to a Converted analog value register (Additional Registers, address 17). Output Voltage to Analog Output in Manual Mode To output voltage to the analog output in manual mode, select the analog voltage output (OB-216 Settings, address 150, value 3). Check the load connection for the voltage output (Figure 1, pos. 10). Afterwards use the register for writing value in manual mode (address 151) to control the output. For example, when the value 500, is written to the register, a 5 V level voltage will appear at the analog voltage output (Figure 1, pos. 10) (when the conversion of the output value is disabled). To convert a manually set value, turn on the conversion of the output value by writing the value «1» to the register (address 152), and the required ranges in the corresponding registers (addresses 153-156). Current Measurement Connect the device according to Figure 2 (a). Configure it to operate in the «Current measurement» (OB-216 Settings, address 100, value 3). The Measured value register (Additional Registers, address 6) will display the current measured at the «IO1» terminal (Figure 1, pos. 7). If the device has to indicate overcurrent (or undercurrent), the corresponding thresholds should be set (OB-216 Settings, addresses 104, 105). Write the upper threshold value to register 104 and lower threshold value to register 105. When the current value is out of range, the corresponding bit will be set to «1» (bit 22 – current value above the upper threshold, bit 23 – current value below the lower threshold) (see Status Register, address 2:3). Current Measurement with Value Conversion To convert the measured current to another value, turn on the conversion (OB-216 Settings, address 130, value 1) and set the conversion ranges (addresses 131 – 134). For example, the measured current needs to be converted to pressure bars with the following sensor parameters: a current of 4.5 mA corresponds to a pressure of 1 bar; a current of 20 mA corresponds to a pressure of 25 bar. Configure the conversion ranges as follows: minimum input value (address 131, value 450 which corresponds to 4.5 mA), maximum input value (address 132, value 2000 corresponds to 20 mA), minimum converted value (address 133, value 1 corresponds to 1 bar), maximum converted value (address 134, value 25 corresponds to 25 bar). The converted value will be output to a Converted value register (Additional Registers, address 16). Current Measurement with Analog Voltage Output To output the measured current to the analog voltage output, select the analog voltage output (OB-216 Settings, address 150, value 1). Check the load connection for the voltage output (Figure 1, pos. 10). Set the conversion ranges (OB-216 Settings, registers 153-156). For example, to convert a measured current in the 0 mA to 20 mA range to a voltage (0 V to 5 V range): write the minimum input current value into the register with address 153 (0); write the maximum input current value into the register with address 154 (2000 corresponding to 20 mA); write the minimum output voltage value into the register with address 155 (0); write the maximum output voltage value into the register with address 156 (500 corresponding to 5 V). The converted analog value will be output to a Converted analog value register (Additional Registers, address 17). Current Measurement with Output to Analog Current Output To output the measured current to the analog current output, select the analog current output (OB-216 Settings, address 150, value 2). Check the load connection for the current output (Figure 1, pos. 9). Set the conversion ranges (OB-216 Settings, registers 153-156). For example, to convert a measured current in the 0 mA to 10 mA range to a current in range of 4 mA to 20 mA: write the minimum input current value into the register with address 153 (0); write the maximum input current value into the register with address 154 (1000 corresponding to 10 mA); write the minimum output current value into the register with address 155 (400 corresponding to 4 mA); write the maximum output current value into the register with address 156 (2000 corresponding to 20 mA). The converted analog value will be output to a Converted analog value register (Additional Registers, address 17). Current Output to Analog Output in Manual Mode To output current to the analog output in manual mode, select the analog current output (OB-216 Settings, address 150, value 4). Check the load connection for the current output (Figure 1, pos. 9). Afterwards use the register for writitng value in manual mode (address 151) to control the output. For example, when the value 500, is written to the register, a 5 mA level current will appear at the analog current output (Figure 1, pos. 9) (when the conversion of the output value is disabled). To convert a manually set value, turn on the conversion of the output value by writing the value «1» to the register (address 152), and the required ranges in the corresponding registers (addresses 153-156). Temperature Measurement In this mode, the device measures the temperature using an external analog thermistor. Connect the device according to Figure 2 (c). Configure it for operation in the «Temperature measurement» (OB-216 Settings, address 100, value 4, 5 or 6). The Measured value register (Additional Registers, address 6) will display the temperature measured by thermistor connected to the «IO2» terminal (Figure 1, pos. 7). Temperature values are displayed with an accuracy of tenths of a degree Celsius (1234 = 123.4 °С; 123 = 12.3 °С). If the device has to indicate overheat (or underheat), the corresponding thresholds should be set (OB-216 Settings, addresses 104, 105). Write the upper threshold value to register 104 and lower threshold value to register 105. When the temperature value is out of range, the corresponding bit will be set to «1» (bit 24 – temperature above the upper threshold, bit 25 – temperature below the lower threshold) (see Status Register, address 2:3). In order to correct the temperature measured by the sensor, enter the correction temperature into register 102 (OB-216 Settings), in tenths of a degree Celsius. Temperature Measurement with Analogue Output To output the measured temperature to the analog output, write to the Analog output control register with address 150, the value «1» selects the analog voltage output (Figure 1, pos. 10), the value «2» selects the analog current output (Figure 1, pos. 9). Set up the conversion range registers (addresses 153 – 156). Connecting Digital Sensors The device supports digital sensors (one at a time) specified in the OB-216 Settings (address 101). The measured values of the digital sensor can be read from the Temperature register with address 11 or Humidity register with address 12 (depending on which values the sensor measures), in Additional Registers. Poll period of digital sensors is 3 seconds. Temperature values are displayed with an accuracy of tenths of a degree Celsius (1234 = 123.4 °С; 123 = 12.3 °С). Humidity values are displayed with an accuracy of tenths of a percent (800 = 80.0 %). In order to correct the temperature measured by a digital sensor, enter the correction temperature into register 102 (OB-216 Settings), in tenths of a degree Celsius. If the device has to indicate excess (or deficit) of the measured value, the working parameter and the corresponding thresholds should be set (OB-216 Settings, addresses 103, 104, and 105). Select the working parameter in the register 103. Write the upper threshold value to register 104 and lower threshold value to register 105. When the working parameter value exceeds the threshold, the corresponding bit will be set to «1» (bits 24 and 25 – temperature value above the upper or below the lower threshold, bits 26 and 27 – humidity value above the upper or below the lower threshold) (see Additional Registers, address 2:3). Note When connecting sensors via the 1-Wire interface, it is necessary to install an external resistor to pull up the «Data» line to the power supply, with a nominal value of 2 kΩ to 5.1 kΩ. Connection of Digital Sensors with Output to Analog Output To output the working parameter of the digital sensor (OB-216 Settings, address 103) to the analog output, write to the Analog output control register with address 150, the value «1» selects the analog voltage output (Figure 1, pos. 10), the value «2» selects the analog current output (Figure 1, pos. 9). Set up the conversion range registers (addresses 153 – 156). 9 Restarting the Device and Resetting to the Factory Settings If you need to restart the device, close and hold contacts «R» and «–» for 3 seconds (Figure 1). If it is required to restore the factory settings of the device, close and hold contacts «R» and «–» for more than 10 seconds (Figure 1). After 10 seconds, the device will restore factory settings and reboot. Also, the above actions can be performed through the command register by writing the corresponding command into it (Command Registers, address 50). 10 Modbus Interface Reference For USB and RS-485 interface configuration, supported functions, registers, message formats, and command details, see the dedicated OB-216 Modbus Interface Reference. 11 Safety Precautions SAFETY To ensure the device safe operation it is strictly forbidden the following: to carry out mounting works and maintenance without disconnecting the device from the mains; to open and repair the device independently; to operate the device with mechanical damages of the case. It is not allowed water penetration on terminals and internal elements of the device. During operation and maintenance, the regulatory document requirements must be met, namely: Regulations for Operation of Consumer Electrical Installations; Safety Rules for Operation of Consumer Electrical Installations; Occupational Safety in Operation of Electrical Installations. 12 Maintenance Procedure Recommended frequency of maintenance is every six months. Maintenance Procedure: Check the connection reliability of the wires, if necessary, clamp with the force 0.4 N·m; Visually check the integrity of the housing; If necessary, wipe the front panel and the housing of the device with cloth. Do not use abrasives and solvents for cleaning. 13 Transportation and Storage The device in the original package is permitted to be transported and stored at the temperature from minus 45 to +60 °C and relative humidity of no more than 80 %, not in aggressive environment. 14 Service Life and Warranty The lifetime of the device is 10 years. Shelf life is 3 years. Warranty period of the device operation is 5 years from the date of sale. During the warranty period of operation, the manufacturer performs free repair of the device, if the user has complied with the requirements of the Operating Manual. ATTENTION The User loses the right for warranty service if the device is used with violation of the requirements of this Operating Manual. Warranty service is performed at the place of purchase or by the manufacturer of the device. Post-warranty service of the device is performed by the manufacturer at current rates. Before sending for repair, the device should be packed in the original or other packing excluding mechanical damage. For all questions, please contact the manufacturer: “Novatek-Electro” Ltd. www.novatek-electro.com 59, Mykhailo Boltenko (Admiral Lazarev) str., Odesa, Ukraine, 65007 Tel: +38 (067) 565 37 68 +38 (050) 359 39 11 +38 (063) 301 30 40 VN250731

Novatek-Electro OB-216 Documentation

OB-216 Modbus Interface Reference OB-216 Settings Table – OB-216 Settings Setting operating modes (Address 100) Parameter Value range Factory value Type W/R Address (DEC) Operating mode 0…6, 8, 11–12 1 UINT W/R 100 Operating mode values: Measurement of discrete signals: 0 – impulse counter (discrete signal) 1 – logical input Measurement of analog signals: 2 – voltage measurement 3 – current measurement Temperature measurement: 4 – NTC sensor (10KB) 5 – PTC 1000 sensor 6 – PT 1000 sensor Additional: 8 – digital sensor (1-Wire)* 11 – pulse counter (voltage) 12 – pulse counter (current) Connected digital sensor (Address 101) Parameter Value range Factory value Type W/R Address (DEC) Connectable digital sensor 0…3 0 UINT W/R 101 Connectable digital sensor values: 0 – DS18B20 (1-Wire) 1 – DHT11 (1-Wire) 2 – DHT21/AM2301 (1-Wire) 3 – DHT22 (1-Wire) Temperature and threshold settings (Addresses 102–105) Parameter Value range Factory value Type W/R Address (DEC) Temperature correction –99…99 0 INT W/R 102 Working parameter* 0…1 0 UINT W/R 103 Upper threshold -32767…32767 250 INT W/R 104 Lower threshold –32767…32767 0 INT W/R 105 Working parameter values: 0 – temperature 1 – humidity Settings for the pulse counter (Addresses 106–108) Parameter Value range Factory value Type W/R Address (DEC) Pulse counter mode 0…2 0 UINT W/R 106 Contact debouncing delay** 1…250 10 UINT W/R 107 Number of pulses per counting device*** 1…65534 8000 UINT W/R 108 Pulse counter mode values: 0 – counter on the rising edge of the pulse 1 – counter on the falling edge of the pulse 2 – counter on both pulse edges Data transfer settings (Addresses 109–116) Parameter Value range Factory value Type W/R Address (DEC) RS-485 protocol 0…1 0 UINT W/R 109 MODBUS UID 1…247 28 UINT W/R 110 Exchange rate 0…8 3 UINT W/R 111 Parity and stop bits control 0…2 0 UINT W/R 112 Interface selection 0…2 0 UINT W/R 113 Password protection Modbus**** 0…1 0 UINT W/R 116 Modbus password value A–Z, a–z, 0–9 admin STRING W/R 117–124 RS-485 protocol values: 0 – MODBUS RTU 1 – MODBUS ASCII Exchange rate values: 0 – 1200 1 – 2400 2 – 4800 3 – 9600 4 – 14400 5 – 19200 6 – 38400 7 – 57600 8 – 115200 Parity and stop bits control values: 0 – no, 2 stop bits 1 – even, 1 stop bit 2 – odd, 1 stop bit Interface selection values: 0 – automatically 1 – RS-485 2 – USB Measured value conversion settings (Addresses 130–134) Parameter Value range Factory value Type W/R Address (DEC) Measured value conversion 0…1 0 UINT W/R 130 Minimum input value 0…2000 0 UINT W/R 131 Maximum input value 0…2000 1000 UINT W/R 132 Minimum converted value –32767…32767 0 INT W/R 133 Maximum converted value –32767…32767 1000 INT W/R 134 Measured value conversion values: 0 – conversion is disabled 1 – conversion is enabled Settings for analog output (Addresses 150–156) Parameter Value range Factory value Type W/R Address (DEC) Analog output control 0…4 0 UINT W/R 150 Register for writing value in manual mode 0…2000 0 UINT W/R 151 Converting the manual control value to analog signal 0…1 0 UINT W/R 152 Minimum input value –500…2500 0 INT W/R 153 Maximum input value –500…2500 1000 INT W/R 154 Minimum converted analog value 0…2000 0 UINT W/R 155 Maximum converted analog value 0…2000 1000 UINT W/R 156 Analog output control values: 0 – control is disabled 1 – automatic control of voltage output 2 – automatic control of current output 3 – manual control of voltage output 4 – manual control of current output Converting the manual control value to analog signal values: 0 – conversion is disabled 1 – conversion is enabled Notes: * Used parameter of the selected digital sensor (address 101). ** Delay in milliseconds used to suppress contact bounce in the «Pulse counter» and «Logic input/pulse relay» modes. *** Used only if pulse counter is enabled. The «Value» column indicates the number of pulses at the input, after the registration of which the counter is increased by one. Writing to memory is performed at intervals of 1 minute. **** If «Modbus password protection» is enabled (address 116 value «1»), then the correct password value must be written to addresses 51-58 in order to access the writing functions to the other addresses. Command Registers Name Description W/R Address (DEC) Command register see Command codes below W/R 50 Entering Modbus password (8 ASCII characters) Set the correct password to access the recording functions (default value is “admin”). To disable recording functions, set any value other than a password. Allowed characters: A-Z; a-z; 0-9 W/R 51 – 58 Notes: W/R – type of access to the register write/read; an address like “50” means a 16-bit value (UINT); address like “51 – 58” mean a range of 8-bit values. Command codes Code Purpose 18220 write settings to flash memory 18263 load settings from flash memory 42228 device restart 41672 reset to factory settings 61989 reset the impulse counter (this will clear all values stored in the flash memory) Additional Registers Name Description W/R Address (DEC) Identifier Device ID (value 28) R 0 Firmware version 12 R 1 Impulse counter – W/R 4:5 Measured value* – R 6 Temperature (× 0.1°С) – R 11 Humidity (× 0.1%) – R 12 Converted value** – R 16 Converted analog value*** – R 17 Notes: address of the form «1» means the value of 16 bits (INT); address of the form «2:3» means 32-bit value (ULONG); * Measured value from analog sensors (voltage, current, temperature); ** Converted value of the measured value in accordance with the settings in the registers (addresses 131 - 134); *** The measured value converted into an analog signal at the output in accordance with the settings in the registers (addresses 153 - 156) Status Register (Address 2:3) Name Description W/R Address (DEC) Status register see Status bits below R 2:3 Status bits: Bit Description Equals 0 Equals 1 bit 0 impulse counter (discrete) disabled enabled bit 1 counter on the leading edge of the pulse disabled on bit 2 counter on the trailing edge of the pulse disabled on bit 3 counter on both pulse edges disabled on bit 4 logical input disabled enabled bit 5 voltage measurement disabled enabled bit 6 current measurement disabled enabled bit 7 measurement by the NTC (10KB) sensor disabled enabled bit 8 measurement by PTC1000 sensor disabled enabled bit 9 measurement by PT1000 sensor disabled enabled bit 10 impulse counter (by voltage) disabled enabled bit 11 impulse counter (by current) disabled enabled bit 12 measurement by DS18B20 sensor disabled on bit 13 measurement by DHT11 sensor disabled on bit 14 measurement by DHT21 sensor disabled on bit 15 measurement by DHT22 sensor disabled on bit 16 automatic output mode for voltage for current bit 17 manual output mode for voltage for current bit 18 «IO2» input open closed bit 19 exchange interface RS-485 USB bit 20 overvoltage no detected bit 21 undervoltage no detected bit 22 overcurrent no detected bit 23 undercurrent no detected bit 24 temperature high no detected bit 25 temperature low no detected bit 26 humidity high no detected bit 27 humidity low no detected bit 28 voltage/current input value conversion disabled enabled bit 29 device settings changes saved not saved bit 30 device calibration calibrated uncalibrated bit 31 analog output value conversion disabled enabled Configuring the Device for USB Operation If the register (address 113) contains the value «0» (automatic selection of the interface), the device will automatically switch and work with USB, while OB-216 is connected to the PC via a USB cable (the RS-485 interface is unavailable while it does). Otherwise, if the cable is disconnected, the device works with the RS-485 interface. To work with the RS-485 interface only , it is necessary to write the value «1», to the register (address 113); with this setting, the device will not switch to work with USB when the cable is connected. To work with the USB interface only, it is necessary to write the value «2», to the register (address 113), with this setting the device will work only with the USB interface, and access to the device via RS-485 will be prohibited. Modbus protocol usage OB-216 allows data exchange with external devices using the Modbus protocol with a limited set of commands (the list is given in List of Supported Functions). When building a network, the bus topology and master-slave organization is used, where OB-216 acts as a slave. Only one master can be present on the network with one or several slaves. A personal computer software or a programmable logic controller usually acts as a master node. With this organization, only the master node can act as the initiator of exchange cycles. Host requests are individual (addressed to a specific device). OB-216 transmits in response to individual requests from the master. If errors are detected in receiving requests, or if it is impossible to execute the received command, OB-216, as a response, generates an error message. The addresses (in decimal) of the settings registers and their purpose are shown in Settings Registers. The addresses (in decimal) of the command registers, commands and their purpose are shown in Command Registers. Addresses (in decimal) of additional registers and their purpose are given in Additional Registers. The address (in decimal) of the status register and its purpose is given in Status Register. List of Supported Functions Function (hex) Appointment Note 0x03 Reading one or more registers Maximum 50 0x06 Writing one value to a register – 0x08 Communication diagnostics – Message Formats The exchange protocol has clearly defined message formats. Compliance with the formats ensures the correctness and stability of the network. Byte Format OB-216 is configured to operate with one of two formats of data bytes: with parity control (Figure 4) and without parity control (Figure 5). In parity control mode, the type of control is also indicated: Even or Odd. Transmission of data bits is performed by the least significant bits forward. By default (during manufacture) the device is configured to operate without parity control and with two stop bits. Byte transfer is performed at speeds of 1200, 2400, 4800, 9600, 14400 and 19200 bps. By default, during manufacturing, the device is configured to operate at a speed of 9600 bps. Note For Modbus RTU mode 8 data bits are transmitted, and for MODBUS ASCII mode 7 data bits are transmitted. Figure 4, 5 – Byte format with parity control (top) and without parity control (bottom) Frame Format The frame length cannot exceed 256 bytes for Modbus RTU and 513 bytes for Modbus ASCII. In Modbus RTU mode the start and end of the frame are monitored by silence intervals of at least 3.5 bytes. The frame must be transmitted as a continuous byte stream. The correctness of frame acceptance is additionally controlled by checking the CRC checksum in the last two bytes. The RTU address field occupies one byte. The addresses of the slaves are in the range from 1 to 247. Figure 6 shows the RTU frame format. Figure 6 – RTU frame format In Modbus ASCII mode the start and end of the frame are controlled by special characters: symbol : (0x3A) – for start of the frame; symbols \r\n or CR+LF (0x0D,0x0A) – for the end of the frame. Note In Modbus ASCII mode each byte of data is encoded by two characters of ASCII code (for example: 1 byte of data 0x25 is encoded by two bytes of ASCII code 0x32 and 0x35). The frame must be transmitted as a continuous stream of hexadecimal characters. As the frame is bounded by special characters, the timings of the transmissions are not as strict as those for RTU frame. The correctness of frame acceptance is additionally controlled by checking the LRC checksum in the last two transmitted hexadecimal characters. The address field occupies two hexadecimal characters. The addresses of the slaves are in the range from 1 to 247. Figure 7 shows the ASCII frame format. Figure 7 – ASCII frame format Checksum Generation and Verification The transmitting device generates a checksum for all bytes of the transmitted message. OB-216 similarly generates a checksum for all bytes of the received message and compares it with the checksum received from the transmitting device. If the generated and received checksums do not match, an error message is generated. CRC Checksum Generation The checksum in the message is sent by the least significant byte forward. It is a cyclic redundant code verification based on the irreducible polynomial 0xA001. Subroutine for CRC checksum generation in C language: uint16_t GenerateCRC(uint8_t *pSendRecvBuf, uint16_t uCount) { const uint16_t Polynom = 0xA001; uint16_t crc = 0xFFFF; uint16_t i; uint8_t byte; for(i=0; i<(uCount-2); i++){ crc = crc ^ pSendRecvBuf[i]; for(byte=0; byte<8; byte++){ if((crc & 0x0001) == 0){ crc = crc >> 1; }else{ crc = crc >> 1; crc = crc ^ Polynom; } } } return crc; } LRC Checksum Generation The checksum in the message is transmitted by the most significant byte forward, which is a longitudinal redundancy check. Subroutine for LRC checksum generation in C language: uint8_t GenerateLRC(uint8_t *pSendRecvBuf, uint16_t uCount) { uint8_t lrc = 0x00; uint16_t i; for(i=0; i<(uCount-1); i++){ lrc = (lrc + pSendRecvBuf[i]) & 0xFF; } lrc = ((lrc ^ 0xFF) + 2) & 0xFF; return lrc; } Command System Function 0x03 – Reading a Group of Registers Function 0x03 provides reading of the contents of registers OB-216. The master query contains the address of the initial register, as well as the number of words to read. The OB-216 response contains the number of bytes to return and the requested data. The number of registers returned is limited to 50. If the number of registers in the query exceeds 50 (100 bytes), the response is not divided into frames. An example of the query and response in Modbus RTU is shown in Figure 8. Figure 8 – Example of reading registers (Function 0x03) Function 0x06 – Recording the Register The function 0x06 provides recording in one OB-216 register. The master query contains the address of the register and the data to be written. The device response is the same as the master query and contains the register address and the set data. An example of the query and response in Modbus RTU mode is shown in Figure 9. Figure 9 – Example of writing to a register (Function 0x06) Function 0x08 – Communication Diagnostics Subfunction 0x00 - returns the received data, the response is identical to the request. An example of a request and response is shown in Figure 10. Figure 10 – Example of communication diagnostics (Function 0x08) Modbus Error Codes Error code Name Comments 0x01 ILLEGAL FUNCTION Illegal function number 0x02 ILLEGAL DATA ADDRESS Incorrect address 0x03 ILLEGAL DATA VALUE Invalid data 0x04 SERVER DEVICE FAILURE Failure of controller equipment 0x05 ACKNOWLEDGE Data is not ready 0x06 SERVER DEVICE BUSY System is busy 0x08 MEMORY PARITY ERROR Memory error

Novatek-Electro OB-216 Documentation

Firmware Update To update the firmware, the BIN update file should be manually sent to the device. This can be done with Control Panel OB-215/OB-216, version 1.0.8 or higher. Before you start Data Safety Firmware update does not erase your device configuration or Modbus settings, unless specifically warned so in the firmware description. Power Supply Ensure the device has a stable power supply during the update process. Do not power off the device while the update is in progress (usually 20-30 minutes). Recoverability The update process faults (e.g. caused by power losses or communication interruptions) are recoverable by repeating the update until it is complete. In case of link loss or file damage, the update can be completed by replacing the file. Checking current version Before updating, check your current firmware version to see if an update is necessary. You can find the version number: At the bottom of the Control Panel application window, after it connects to OB-216. By reading Modbus Firmware version register (Additional Registers, address 1). Getting the update file into OB-216 To write the update files into the OB-216 memory: Connect OB-216 via RS-485 interface OB-216 should be connected using external USB/RS-485 interface converter or Modbus RTU/Modbus TCP converter. If Modbus TCP converter is used, its RS-485 response timeout should be set high (5000 ms) to allow for long memory erase delays in the firmware update process. Recoverability The OB-216 USB interface is in most cases unsuitable for firmware update, due to restarts required in the process. Connect Control Panel OB-215/OB-216 to the device If USB/RS-485 converter is connected, use Program settings button to select serial port and set baud rate 9600, parity and stop bits None, 2, protocol RTU. If Modbus TCP converter is connected, use Program settings button to select Modbus TCP port and address. Use Connect to device button to connect to the OB-216. Check current device firmware version in the bottom of the application window. Start firmware upgrade Disconnect from device (if connected). Use Program settings button, then Firmware upgrade button in the Settings window. Use Open file button and select the BIN file on your drive. Check the file version in the top right corner of the window. Use Upgrade button to start the firmware update process. Entering update mode If reset and switching to firmware update mode is prompted by application, confirm it by clicking OK. If application suggests turning off the device power supply, turn it off, wait for 5 s and then turn it on again. Wait till the update process finishes The process may take up to 20-30 minutes. The process will be shown in the application window, with progress bar and updating log messages. Confirm the version number Connect to OB-216 again if needed. Check the version number in the Control Panel application window. Troubleshooting & FAQ Q: Will I lose my configuration or data during an update? A: No, the firmware update to a newer version process is designed to preserve your device configuration, and Modbus settings. However, downgrading the firmware may revert the settings to factory defaults. In either case, backing up critical data is always recommended. Q: The Firmware Upgrade button is not appearing in the application window. A: Disconnect the application from the device, then use Program Settings button. Check the application version is 1.0.8 or newer. Q: The Control Panel application does not recognize the file, and no file version is displayed. A: Check the following: The file is the correct OB-216 update file downloaded from the Firmware Downloads. The file has BIN extension (in the file properties). The file is not archived (unpack if it is). Q: The update process seems to hang. A: The update process typically takes 20-30 minutes. If it takes significantly longer: Do not power off the device immediately. Check the log in the application window for any error messages. If the device is unresponsive (or the update process is stalled while the device LEDs blink intermittently), try to repeat the update process. Q: Can I downgrade the firmware? A: Yes, you can install an older firmware version by sending the older firmware file to the device. However, the device settings are not always retained and may be reverted to factory defaults after firmware downgrade. Need Help? For technical support and assistance: Email: support@overvis.com Support portal: www.overvis.com/support

Novatek-Electro OB-216 Documentation

Firmware Downloads Latest Version Version Release Date MD5 Download 12 (Latest) 2020-03-16 096275a5c74790242218c83a2b7a4988 Download See Firmware update instructions for the way to update the firmware. Changelog Version 12 2020-03-16 Download New Feature: Changed conversion register 151 purpose (DAC can operate with or without conversion). Improvement: Improved measurement accuracy on the analog input. Bugfix: Fixed output to status registers of the value output to DAC in manual modes. Bugfix: Fixed peripheral reinitializations. Bugfix: Fixed out-of-range values for NTC sensor. Bugfix: Fixed range check for the value written to the counter. Version 11 2019-08-08 Improvement: Temperature measurement filters. Improvement: Improved voltage and current measurement calibration quotients. Bugfix: Restarts do not stop USB exchange anymore. Version 10 2019-04-15 New Feature: Initial demo release.

Novatek-Electro OB-216 Documentation

Additional Software This page lists the software available for configuring and monitoring the Overvis OB-216 Digital Input/Output Module. Control Panel OB-215/OB-216 Control Panel OB-215/OB-216 is a Windows application for configuring the OB-215 and OB-216 through their Modbus communication interfaces. Use the application to: Connect to the OB-216 through USB or RS-485. Read device status and measured values. Configure the operating mode, connected sensor, communication settings, thresholds, scaling, pulse counting, and analog output. Save settings to the device. Upgrade the device firmware. For initial connection and configuration instructions, see Quick Start and Application Setup. Download: setup_cpl_ob21x(ver1.0.8).exe