Siemens Simatic PCS7 Function Manual page 190

Operator control and monitoring
6.13 Overview of maintenance
This enables a coordinated maintenance sequence.
The maintenance sequence is documented and can be tracked.
Maintenance is initiated and edited in the faceplate in the "Maintenance" view
Status diagram
The possible status transitions are explained in the diagram below.
Actions of the maintenance engineer cause status changes.
The next section provides detailed instructions for activating and deactivating a maintenance
job.
Additional information
You can find additional information on the release for maintenance and on configuring the
technological blocks in the online help
Library .
190
Process Control System PCS 7; Advanced Process
Function Manual, 03/2016, A5E36187641-AA
Maintenance Station