Two-Hand Discrepancy Error - Between Pairs (Safe Inputs Active)

Was bedeutet FB TWOHAND Bit 10 ?

Similar to 'FB TWOHAND Bit 2', but specifically when the 'Safe Inputs after Disc Error' option is active for the discrepancy between input pairs. This means a timing discrepancy occurred between the two-hand input pairs, and despite the FB's attempt to maintain a safe state, the error persists, indicating a critical violation of the simultaneous actuation requirement, stopping the machine.

• Substantial difference in operator actuation speed between input pair 1 and input pair 2.
• One two-hand button assembly has significantly slower response time than the other due to mechanical wear or internal damage.
• Incorrectly configured 'TwoHandDiscrepancyTime' or 'BetweenPairDiscrepancyTime' parameters in the safety controller.
• Partial failure of the wiring or contacts for one entire input pair, causing delayed signal transmission.
• Varying environmental factors (e.g., temperature) affecting the performance of one button more than the other.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   1. Observe the operator's simultaneous actuation of both two-hand control pairs and provide retraining if an inconsistent actuation pattern is identified.

2. 2

   2. Test the electrical response time of each two-hand button assembly individually using an oscilloscope to detect differences greater than 50ms.

3. 3

   3. Review and potentially increase the 'BetweenPairDiscrepancyTime' parameter (e.g., P_TwoHandTimeDiff) in the safety controller configuration.

4. 4

   4. Verify the integrity and continuity of all four input lines (two for each pair) to ensure consistent signal transmission to the safety PLC.

5. 5

   5. Execute a safety system acknowledgement or reset procedure (e.g., by pressing a designated 'Reset' button on the HMI) to clear the active safe state and restart the FB TWOHAND function.