Interrupts, diagnostics messages, error and system alarms
6.5 Device-specific diagnostics in DP-V1
CM 1542-5
Manual, 11/2014, C79000-G8976-C290-02
31
Byte 3: Variant "Status specifier"
Table 6- 9
Structure of byte 3 of the device-specific diagnostics (variant "status specifier")
Bit no.
Meaning
7...2
- reserved -
1...0
Status_Specifier
0
No further distinction
1
Status appears
2
Status disappears
3
- reserved -
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 6- 10 Structure of the bytes for module-specific diagnostics data
Byte
Bit assignment
Bit
7
6
5
4
3
2
1
0
4
Module status 4
Module status 3
Module status 2
Module status 1
5
Module status 8
Module status 7
Module status 6
Module status 5
...
...
...
...
...
62
Module status 236
Module status 235
Module status 234
Module status 233
The status bits are coded as follows:
Table 6- 11 Meaning of the values of the status bits
Value
Meaning
00
Data valid
01
Data invalid - error (for example short-circuit)
10
Data invalid - wrong module
11
Data invalid - no module plugged in
