Omron SYSMAC CS Series Operation Manual page 258

Slave Diagnostics Message
Bit Name
00 Block length
~
05
06 Reserved
~
07
Note The Device related diagnostics as defined above is according to the PROFIBUS-DP standard. With the
release of the PROFIBUS DP-V1 standard, the Device related diagnostics contents has been re-defined
to accommodate diagnostics from slave devices supporting PROFIBUS DP-V1.
Module Related Diagnostics
The Module or Identifier related diagnostics data block consist of a header byte followed by one or more bytes
containing flags, which indicate if there is diagnostics pending related to the I/O configuration modules. Each
flag is related to the corresponding I/O module, defined during configuration. Non-used flags are always set to
0.
The figure below shows the header byte, and one module diagnostics byte. Depending on the number of I/O
modules configured, there may be more bytes.
Module Diagnostics Byte
Header byte
Bit Name
00 Block length
~
05
06 Reserved
~
07
These bits contain the length of the Device related diagnostics data block, includ-
ing the header byte. The Device diagnostics will follow this header byte.
Maximum length of the block, including the header is 63 bytes.
Interpretation of the diagnostics bytes in this block is device dependent.
Fixed to 00.
The combination of bit 6 and 7 indicate the type of diagnostics, i.e. 00 indicates
Device related diagnostics data.
7 6 5 4 3 2 1 0
Header Byte 0 1
7 6 5 4 3 2 1 0
These bits contain the length of the Module related diagnostics data block,
including the header byte. The Module diagnostics flags will follow this header
byte. Maximum length of the block, including the header is 63 bytes.
Fixed to 01.
The combination of bit 6 and 7 indicate the type of diagnostics, i.e. 01 indicates
Module related diagnostics data.
Description
Block Length
Module 0 Diagnostics
Module 1 Diagnostics
Module 2 Diagnostics
Module 3 Diagnostics
Module 4 Diagnostics
Module 5 Diagnostics
Module 6 Diagnostics
Module 7 Diagnostics
Description
Appendix B
237