Start inhibit
The start inhibit activates the STO function and prevents the automatic startup of the safety option.
The start inhibit is activated in the following cases:
- Switching on of the device with integrated safety option
- End of a muting function
- Parameterization in the event of a limit value violation
- Parameterization with pending input error
- Restoration of the parameter set, e.g. after device replacement
- Restoration of the delivery state
The start inhibit can be deactivated as follows:
- Through a fault acknowledgment with a safe digital input F-DI or via the Fault acknowledgment bit on the safe process data
- For all causes (except for the start inhibit after powering on the device) by switching the device off and on again
Using the Fault status after startup parameter (8703.240), you can set whether the start inhibit is activated after the device is powered on.
