Muting Discrepancy Error - OSSD Input Group
Beckhoff · TwinSAFE Logic FB
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.
Complete Troubleshooting Guide
- 1
Check the alignment, cleanliness, and functionality of the OSSD device (e.g., safety light curtain, area scanner) for proper operation.
- 2
Inspect the wiring from the OSSD device to the TwinSAFE inputs, ensuring both OSSD channels are correctly connected, free from damage, and properly terminated.
- 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.
- 4
Monitor the individual OSSD channels during operation using diagnostics to identify inconsistencies or delays.