Omron CJ Series Operation Manual page 297

 Example of Extended Diagnostics
Below an example of Extended diagnostics data is given, using the definitions above. The 6 manda-
tory bytes preceding them are not shown.
Device related diagnostics:
Module related diagnostics:
Channel related diagnostics:
Channel related diagnostics:
The figure above shows the extended diagnostics of a slave device, which contains:
• Device related diagnostics: One header byte and three device specific diagnostics bytes are
shown in this example. The contents of the diagnostics is device specific.
• Module related diagnostics: One header byte and three module diagnostics bytes. The first of
three bytes indicates pending diagnostics in module1, the next byte indicates pending diagnostics
in module14.
• Channel related diagnostics: Two channel related diagnostics entries are shown: One for module
1 and one for module 14. In module 1, Input channel 4, has detected an overload. In module 14,
channel 8, has detected an high-limit exceeded event.
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
7 6 5 4 3 2 1 0
0 0 0 0 0 1 0 0
Device specific
diagnostics field
of length 3
0 1 0 0 0 1 0
1
1
1 0 0 0 0 0 0 1
0 1 0 0 0 1 0 0
0 1 1 0 0 1 0 0
1 0 0 0 1 1 1 0
0 0 0 0 1 0 0 0
1 0 0 0 0 1 1 1
Header byte
Device specific contents
1 Header byte
Module 1 has diagnostics
Module 14 has diagnostics
Module 1
Channel 4 (Input)
Overload, bit oriented
Module 14
Channel 8
High Limit exceeded, byte oriented
Appendices
A-31