Channel Readback Error

What does 525 mean?

A channel readback error occurs when the actual state of an output channel, as read back by the module, does not match the commanded state. This can be due to a wiring issue, an external load problem, or an internal fault within the I/O module, leading to an unreliable output.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If the error persists after wiring checks and restart, replace the I/O module as an internal hardware fault is indicated.