Festo CPX-FB13 - Page 109

3. Diagnosis
3−13
Festo P.BE−CPX−FB13−EN en 0811c
Device−related diagnosis (16 bytes), (module status DPV1)
Byte Contents Explanation
7 Header With CPX terminal fixed 10
h
8 Type With CPX terminal fixed 82
h
9 Slot With CPX terminal fixed 0
h
10 Slot With CPX terminal fixed 0
h
11 Module 0 (bits 1 and 2)
...
Module 3 (bits 6 and 7)
2 bits per module:
00 = no fault (valid useful data)
01 = module fault (invalid useful data)
10 = incorrect module (invalid useful data)
11 = module failed or does not exist (invalid useful data)
12 Module 4 Ū 7 Like byte 11
13 Module 8 Ū 10
(bits 6 and 7 are reserved)
Like byte 11
14 Ū 22 Reserved 
Tab.3/8:Diagnostic bytes 7 Ū 22: Device−related diagnosis (fixed at length of 16 bytes)
Module−related diagnosis (7 bytes)
Byte Contents Explanation
23 Header With CPX terminal fixed 47
h
24 Module−related diagnosis module 0 Ū 7 Relative module has diagnostic message
25 Module−related diagnosis module 8 Ū 10 Relative module has diagnostic message
26 Ū 29 Reserved 
Tab.3/9:Diagnostic bytes 23 Ū 29: Module−related diagnosis (details in section 3.5.4)