Overflow (InValue above the envelope)
Beckhoff · TwinSAFE Logic FB
What does FB ENVELOPE Value 2 mean?
The input value (InValue) has exceeded the defined upper limit of the envelope in the FB Envelope function block. This indicates a deviation from the expected operating range, potentially causing the safety function to trip or behave unpredictably, leading to an unsafe state.
Complete Troubleshooting Guide
- 1
Verify the physical input signal source connected to 'InValue' for proper operation, calibration, and expected range.
- 2
Check wiring integrity for the 'InValue' signal, including connections, shielding, and potential interference sources.
- 3
Review the FB Envelope parameters, specifically 'Target Value' and 'Offset', in the TwinSAFE configuration to ensure they match the application's actual requirements.
- 4
Monitor the 'InValue' in real-time using diagnostic tools (e.g., TwinCAT Scope) to observe its behavior and confirm the overflow condition.