E-Stop EDM Monitoring Error - EDM1
Beckhoff · TwinSAFE Logic FB
What does FB ESTOP Bit 4 mean?
An External Device Monitoring (EDM) error has been detected for the EDM1 feedback loop of the FB ESTOP. This typically means that the feedback from the safety contactors or relays, which are expected to open after an E-Stop activation, has not been received within the allowed time or in the correct state. This indicates a failure in the safety output circuit or feedback path, preventing safe operation.
Complete Troubleshooting Guide
- 1
Check the wiring of the EDM1 feedback loop, ensuring it is correctly connected to the safety contactor/relay monitoring contacts (e.g., normally closed contacts).
- 2
Verify the functionality of the safety contactor/relay (e.g., KM1) associated with EDM1; ensure contacts are opening/closing as expected.
- 3
Review the EDM monitoring time parameter in the FB ESTOP 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.