The table shows the basic structure of the variable.
Bit Explanation
0 to 7 Display of the maintenance state
8 to 15 Display of the maintenance state of the redundant partner
16 "1"= Redundant partner available
17 "0" = Primary partner is master
"1" = Redundant partner is master
18 SIMATIC PDM maintenance state worse than device status
19 to 21 Reserve
22 SIMATIC PDM has detected a state change
23 Block takes part in the cyclical updating of SIMATIC PDM
24 to 27 OS operation
28 to 31 SIMATIC PDM maintenance state
6.10 Maintenance status of redundant components
Introduction
In the faceplate header and in the block icon, the maintenance status of both components is
displayed in one diagnostic icon for the redundant pair.
The maintenance status for this diagnostic icon is formed from the maintenance states of both
components.
Forming the maintenance status with redundant components
The table below lists the maintenance states that are formed because of this rule.
Maintenance status
Redundant component Component A Component B
Good Good Good
Good Unknown/untested Good
Good Component passivated Good
Maintenance demanded Out of service Good
Good At least one process value is
being simulated
Good
Local operation Local operation Good
Maintenance required Maintenance required Good
Operator control and monitoring
6.10 Maintenance status of redundant components
Maintenance Station
126 Function Manual, 03/2016, A5E36187641-AA
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