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Diagnostics and maintenance
5.1 Diagnostics
Byte 3: Variant "Interrupt specifier"
Table 5- 7
Bit no.
7...3
2
1...0
Byte 3: Variant "Status specifier"
Table 5- 8
Bit no.
7...2
1...0
Bytes 4...62: Module-specific diagnostics: General coding
This byte contains data with module-specific information that is described in the relevant
module documentation. The relevant module is identified by the slot (byte 2).
Bytes 4...62: Module-specific diagnostics with "status type" and "module status"
With the variant "status type" of the device-specific diagnostics of DP-V1 slaves (see byte 1,
bit 7) and the setting "Modul_Status" (see byte 1, bits 0...6), there are two status bits here for
each slot (= module). Bits not required are set to 0.
Table 5- 9
Byte
4
5
...
62
36
Structure of byte 3 of the device-specific diagnostics (variant "interrupt specifier")
Seq_No
Add_Ack
Alarm_Specifier
0
1
2
3
Structure of byte 3 of the device-specific diagnostics (variant "status specifier")
- reserved -
Status_Specifier
0
1
2
3
Structure of the bytes for module-specific diagnostics data
Bit
7
6
Module status 4
Module status 8
...
Module status 236
Meaning
Unique identifier of an interrupt alarm
If this bit is set, the DP-V1 master indicates that this interrupt
requires user acknowledgment in the form of a WRITE job.
No further distinction
Interrupt appears, slot disrupted
The slot generates an interrupt due to an error.
Interrupt disappears, slot OK
The slot generates the interrupt and indicates that it has no further
errors.
Interrupt disappears, slot still disrupted
The slot generates an interrupt and indicates that it has further
errors.
Meaning
No further distinction
Status appears
Status disappears
- reserved -
Bit assignment
5
4
Module status 3
Module status 2
Module status 7
Module status 6
...
Module status 235
Module status 234
Equipment Manual, 01/2023, C79000-G8976-C326-05
3
2
1
Module status 1
Module status 5
...
Module status 233
SIMATIC CP 1542-5
0
...
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