28

Channel cross-talk error

ABB · AC500-S Safety

What does 28 mean?

Cross-talk has been detected between I/O channels, meaning signals from one channel are interfering with another due to electrical coupling. This issue compromises the independence and integrity of safety signals. It can potentially lead to incorrect readings or unintended activations/deactivations, posing a safety risk.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    If this error persists, replace the I/O module, as it may have internal circuit issues contributing to the cross-talk.

Source: ABB AC500-S Safety
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