Siemens SENTRON 3WA System Manual page 70

PROFINET IO
6.4 Interrupt, error and system messages
Block type for maintenance information
The COM190 uses the "Maintenance information" block type to signal that maintenance
information is pending. The "UserStructureIdentifier" for the maintenance information block
is 0x8100.
Structure of the maintenance information
Meaning
UserStructureIdentifier
BlockType
BlockLength
BlockVersion
Reserved
MaintenanceStatus
68
0x8100 (Maintenance)
0x0F00 (MaintenanceItem)
0x0008
0x0001
0x0000
1: Maintenance required
2: Maintenance demanded
System Manual, 11/2021, 92310000004-02
Length
2 bytes
2 bytes
2 bytes
2 bytes
2 bytes
4 bytes
3WA Air Circuit Breaker Communication