Device: cMT2108X2
Version: 6.10.01.259
I’m working on an application with several field devices off the RS485 bus using MODBUS RTU, and have been trying to identify when a device is lost on the network. I’ve been looking at using the LB-9500-LB9755 registers to monitor these, is that the intent of these registers? Is there a recommended way to monitor these using EasyBuilder?
Thanks in advance
Hi @dimmed1102,
To test or check communication, please first confirm the device no. of your device within the system parameters. Here is an example:
Note: The device no. here is ‘1’.
Knowing this will help us determine what system bits to monitor. By pressing [ctrl] + [h] while EB pro is open we can open the address library and search for “device 1”:
Note: Ensure that “System tag” is selected.
Then, expand “Communication Status and Control with Device (COM)” to view applicable addresses:
The ‘SN’ abbreviation stand for station number which is the unit id of each device. Whereas the COM # should match the virtual COM port used to establish communication:
The device no. status registers will go HIGH when connected or LOW when a unit is disconnected.
