Omron SYSMAC CS Series Operation Manual page 261

Slave Diagnostics Message
Example of Extended Diagnostics
Below an example of Extended diagnostics data is given, using the definitions above. The 6 mandatory 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 diagnos-
tics 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.
B-5 PROFIBUS DP-V1 Error codes
The Error codes returned by a PROFIBUS DP-V1 slave device are defined in the PROFIBUS DP-V1 Extension
to the PROFIBUS standard. This section lists the Error codes, which can be returned as a result of a PROFI-
BUS DP-V1 MSAC1 services. From these codes, the user can determine the cause of the failure.
The figure below shows the two of the three Error code bytes, returned by a PROFIBUS DP-V1 slave device, in
case an MSAC1 service resulted in an error. The third byte, Error code 2, which is not shown below will always
contain user specific error codes.
Error decode byte
Error code 1 byte
240
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
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
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
Header byte
Device specific contents
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
Error decode
Error code
Error class
Appendix B