Fig. 9: STO restart lock procedure - Timing and required actions
Use case A
If a STO contact is interrupted during "Switch off", the device status turns to
"Switch On Disabled". As soon as the STO contact is closed again, you can
restart the device with the next "Switch on".
Use case B
If a STO contact is interrupted during "Switch Off", the device will trigger the
"Error" state. The "Error" must be confirmed via an error reset in order to be
able to continue running the device.
Safety Circuit / Restart Lock (STO)
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