Wireless RS485 Modbus Transmitter Settings

Hardware
1

We have “Industrial Wireless RS485 Modbus Transmitter” with “Enterprise IIoT Gateway” and we are trying to set it up correctly (connecting it to the Kurz 454FTB-WGF FLOW METER through Modbus).

  1. Terminals A and B. Which one is positive? (asking just to be sure)

  2. What are the default Modbus parameters (stop bits, data bits, parity) for the RS485 Modbus Transmitter? Also, can they be changed?

Those are the sensor data that we are receiving right now:

image
image258×779 11.8 KB

Thank you!

2

Hi @janpevny sure, let me explain.

  1. I am sharing the pinout diagram for the Industrial Wireless RS485 Modbus Transmitter.:
    ncd-modbus-rtu-pinout-1
    ncd-modbus-rtu-pinout-1549×710 35.8 KB

I am also sharing an article that shows how to configure the Modbus RTU transmitter using Node-RED:

  1. The Type 539 (Wireless RS485 Modbus Transmitter) supports stop bit and parity configuration options; however, these features are not currently enabled in the NCD Node-RED library. We have an update in progress, and I will be releasing a new live version of the library shortly.

Note: If you wish to implement this today, you will need to install the development version of the library on your Enterprise IIoT Gateway. For your convenience, I am attaching a flow that can be used as an alternative, should you prefer not to wait.

ncd-update-dev-library-restart.json (4.7 KB)

To apply it, simply Import the flow to your current workspace, deploy it, and click the inject button next to the “Update library to Dev Branch” (located in the bottom set of nodes). Wait for the process to complete, then click the inject node next to the “Restart Node-RED” node.

This is a development version of the library; however, most of the changes are related to other sensor types, so it should remain stable for your use case. To revert to the previous version, repeat the process, but begin with the inject node next to the “Update library to Production Branch”

Please let me know if you encounter any issues.

Thank you,
Eduardo M.