Siemens SENTRON 3WA System Manual page 71

Block type for diagnostic and maintenance alarm
The COM190 uses the "Diagnostic and maintenance" block type to signal incoming and
outgoing diagnostic and maintenance alarms as an "Extended channel diagnosis". The
"UserStructureIdentifier" for this block type is always 0x8002 for this reason.
Structure of the diagnostic and maintenance alarm
Interrupt
UserStructureIdentifier
ChannelNumber
ChannelProperties
ChannelErrorTypes
ExtChannelErrorType
ExtChannelAddValue
In the case of maintenance alarms, the additional maintenance information is transferred via
the "ChannelProperties" field and the "Qualifier (Bit 9 / 10)" bits.
"ChannelProperties" data block
15
.Direction
"ChannelProperties.Type (Bits 0 to 7)" data block
Value
0
1
2
3
4
5
6
7
"ChannelProperties.Accumulative (Bit 8)" data block
Value
0
1
3WA Air Circuit Breaker Communication
System Manual, 11/2021, 92310000004-02
14 13 12 11
.Specifier
6.4 Interrupt, error and system messages
0x8002 (Extended channel diagnosis)
0x8000 (submodule)
10 9 8 7
.Qualifier .Acc. .Type
Meaning
If ChannelNumber has the value 0x8000.
1 bit
2 bits
4 bits
8 bits
16 bits
32 bits
64 bits
Meaning
No channel error group signal
Channel error group signal (more than one channel affected)
6 5 4 3
PROFINET IO
Length
2 bytes
2 bytes
2 bytes
2 bytes
2 bytes
4 bytes
2 1 0
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