Muting EDM Monitoring Error - EDM1
Beckhoff · TwinSAFE Logic FB
What does FB MUTING Bit 4 mean?
An External Device Monitoring (EDM) error has been detected for the EDM1 feedback loop of the FB MUTING. This indicates a fault in the external safety output circuit (e.g., safety contactors) or its feedback path, which should confirm that the outputs have switched correctly in response to a muting event. This prevents unsafe operation if the outputs fail to respond, leading to a safety stop.
Complete Troubleshooting Guide
- 1
Check the wiring of the EDM1 feedback loop, ensuring it is correctly connected to the safety contactor/relay monitoring contacts.
- 2
Verify the functionality of the safety contactor/relay associated with EDM1; ensure contacts are opening/closing as expected and are not sticking.
- 3
Review the EDM monitoring time parameter in the FB MUTING configuration; adjust if the contactor's switching time legitimately requires more time.
- 4
Measure the voltage across the EDM input to verify the feedback signal's state during activation and deactivation of the monitored device.