TD-150: Difference between revisions
→Checking the connection between the sensor and the terminal via RS-485
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For RS-485, lines A and B of the converter must be connected to lines A and B of the sensor | For RS-485, lines A and B of the converter must be connected to lines A and B of the sensor | ||
[[ | [[File:RS-485 Logging Connections .png|none|thumb|648x648px|'''<big>RS-485 Logging Connections</big>''' ]] | ||
Run [https://drive.google.com/file/d/10i7v4TZ9-JDJYPAh-9JSh4x6vkM93BVV/view?usp=sharing terminal.exe] and configure the COM port as shown below: | Run [https://drive.google.com/file/d/10i7v4TZ9-JDJYPAh-9JSh4x6vkM93BVV/view?usp=sharing terminal.exe] and configure the COM port as shown below: | ||
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After connecting the converter correctly, select the COM port and click Connect. If the sensor is polled by the terminal and responds, then everything is in order. | After connecting the converter correctly, select the COM port and click Connect. If the sensor is polled by the terminal and responds, then everything is in order. | ||
[[ | [[File:Sensor responds to the terminal via RS-485.png|none|thumb|572x572px|'''<big>Sensor responds to the terminal via RS-485</big>''']] | ||
If there is no communication between the two devices, try polling the sensor manually. | If there is no communication between the two devices, try polling the sensor manually. | ||
To do this, enter the request '''31$01$06$6C''' for the sensor with network address 1 and click '''Send''' | To do this, enter the request '''31$01$06$6C''' for the sensor with network address 1 and click '''Send''' | ||
[[ | [[File:Sending a request to the sensor.png|none|thumb|585x585px|'''<big>Sending a request to the sensor</big>''']] | ||
The structure of the request depends on the network address of the sensor. If you change the sensor address to 255, for example, then the request would look like this | The structure of the request depends on the network address of the sensor. If you change the sensor address to 255, for example, then the request would look like this | ||
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In order to calculate the checksum, you can go to the '''[https://crccalc.com/ crccalc]''' website and enter your request without the '''$''' sign, select HEX, CRC-8/MAXIM and click Calc CRC-8 | In order to calculate the checksum, you can go to the '''[https://crccalc.com/ crccalc]''' website and enter your request without the '''$''' sign, select HEX, CRC-8/MAXIM and click Calc CRC-8 | ||
[[ | [[File:CRC calculation for address 255.png|none|thumb|665x665px|'''<big>CRC calculation for address 255</big>''']] | ||
If the sensor is polled by the terminal and responds, then everything is in order. | If the sensor is polled by the terminal and responds, then everything is in order. | ||