10.4.4
Channel-related diagnostics
3 bytes of diagnostic data are available for every channel:
–
Byte 1: module number
–
Byte 2: channel number and input/output
–
Byte 3: type of diagnostics (error type/channel type)
The following applies for the entries in diagnostic bytes 36 … 62:
–
Entries are made in ascending order and without gaps according to module numbers.
–
The entries must always be in the same sequence as the module numbers, irrespective of the time
sequence of the diagnostic messages (if necessary, the entries with large module numbers will be
shifted).
–
In the case of module-orientated and channel-orientated faults on a module, only the module-ori-
entated diagnostic message will be entered.
–
If there are several channel-orientated faults on a module, only the diagnostic message of the
channel with the lowest channel number will be entered.
–
A maximum of 9 diagnostic messages can be processed.
Module number
Bit
Meaning
7
6
5
4
3
2
1
0
Module number 0
…
55
0/1
0/1
0/1
0/1
0/1
0/1
Bit 7 and bit 6 are permanently assigned
1
0
Tab. 27 Channel-related diagnostics - module number
Channel number and input/output
Bit
Meaning
7
6
5
4
3
2
1
0
Channel number0
…
63
0/1
0/1
0/1
0/1
0/1
0/1
Input/output
Reserved
0
0
Input
0
1
Output
1
0
Input/output
1
1
Tab. 28 Channel-related diagnostics - channel number and input/output
Diagnostics and fault clearance
24
Festo — CPX-AP-I-PB-M12 — 2020-03
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