0x4020
Press Unexpectedly Stopped After Starting
Beckhoff · TwinSAFE Logic FB
What does 0x4020 mean?
The PressStarted input was TRUE, indicating a commanded motion, but the position subsequently stopped ('Stopped' changed to TRUE) after having moved. This suggests an unexpected halt during a commanded press operation, which could be due to an obstruction, overload, or sensor fault, potentially damaging equipment or causing an unsafe state.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Check the position sensor for intermittent readings or damage that could falsely indicate a stop.
- 4
Review the process logic for any conditions that might prematurely set the 'Stopped' flag to TRUE during an active PressStarted command.
Source: Beckhoff TwinSAFE Logic FB
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