Hi, I am having difficulty configuring my FMB640 devices for reading modbus-rtu slave. I have followed this guide → Modbus slave integration with FMX125/FMX640 - Wiki Knowledge Base | Teltonika GPS unsuccessfully. I have tried the following
1.Connected to my genset and sent appropriate codec12 command. No response from the device.
2.Simulated a slave with software as shown in the example url but. No response from the devices.
Note: Normal getinfo command returns an appropriate response after ack. Using a USB modbus converter directly connected to the slave returns correct modbus data in both the 2 cases above.
My configurator screen is a bit different from what is shown in the example url see
I am not sure what is the function of START ID, STOP ID. Also parity settings are missing. Could i be using wrong configurations?
Another question that i have is if the slave is not connected on RJ45 port, What is the default behaviour? Am i supposed to get any kind of response? Thanks in advance.