Problem:
When communicating to a Micrologix PLC, the inputs and outputs are displaying incorrect values.
Possible Cause:
Options in the PLC program can add extra I/O words (such as when configuring a MicroLogix 1100's serial CH1 to be a Modbus RTU master). This can shift the locations of the I/O words that correspond to physical I/O.
Solution:
Confirm that the I/O addresses being accessed are correct for the mode of the PLC.