Configuring the SIMATIC Rack PC 840
5-21
SIMATIC Rack PC 840  Manual
A5E00104826-03
After Power
Failure
[Stay Off] After power failure the device is not switched
on automatically.
[Last State] Provided it was switched on prior to a power
failure, the device is switched on again
[Power On] Restores the previous power state before 
loss occured.