Muting Discrepancy Error - OSSD Input Group

What does FB MUTING Bit 1 mean?

A discrepancy has been detected in the OSSD (Output Signal Switching Device) input group (e.g., OssdIn1/OssdIn2) within the FB MUTING function block. These inputs typically come from a safety light curtain or area scanner. A discrepancy means the redundant OSSD signals are not synchronized, indicating a fault in the safety device or its wiring, compromising the primary safeguarding function and stopping the machine.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Review the discrepancy time parameter for the OSSD input group in the FB MUTING configuration; adjust if needed based on the OSSD device specifications.

2. 4

   Monitor the individual OSSD channels during operation using diagnostics to identify inconsistencies or delays.