Hi,
I am using Modbus TCP for communication with virtual controller inside Roboguide. I am using SNPX R553 (HMI Device option).
I have set up some registers and Digital outputs that I can successfully read using the pymodbus.
I am trying to write to UIs (UOP). I have mapped UI[1-8] to rack 34 as Flags. When I try to use the following functions
client.write_coils(85, [True]*4, unit = 1) // setting first 4 UIs to True
client.write_coil(86, False, unit = 1) // setting UI[2] as False
I am not able to do that. The status of UIs does not change. Moreover, sometimes I receive the SNPX communication error on the TP.
However, I can successfully read the DOs. ( single or multiple).
thanks,
Zahid