07-10-2012 12:22 PM
I think you have to tell a bit more then this one line.
What interface are you using ?
What error message do you get ?
With what MB command do you get the error ?
Did you try the MB loopback command ?
07-10-2012 05:58 PM
07-11-2012 09:35 AM
Can you please let us know what the exact error you are receiving is? Have you verified the functionality of your serial port (not using modbus)? What exact plc are you trying to interface with?
10-23-2012 01:08 AM
Might be following Link will be usfull for you