Probably this is the topic that has already been discussed. I am using Ignition version 7.9.4 to connect to Panasonic FP0H PLCs using Modbus TCP. I am still in the initial stage of device connection. However, the connection status keeps changing from connected to disconnected time to time, and I’m worried if this continues, I might have bad tagging problems. I have searched and tried what other people has mentioned in these forums but they don’t work. I have tried increasing the communication timeout from “2000” up to “30000” but the problem still remains. I also have tried decreasing max holding registers and max input registers to save the scan time but doesn’t work.
I have attached the communication settings for my PLC (hopefully it can be viewed)
I have changed the TCP ULP timeout time to 20*100ms to match my Ignition setting but the problem persists.
Appreciate any help from you guys.