I/O Module Cross-Talk Error

What does E3-28 mean?

A cross-talk error has been detected on an I/O bus module. This means unwanted signal coupling is occurring between adjacent channels, leading to incorrect readings or control actions, and potentially compromising system integrity. This interference affects signal reliability.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify that correct cable types (e.g., twisted pair) are used for sensitive signals.

2. 4

   If the cross-talk error persists after extensive wiring checks and restarts, replace the I/O module.