Example Of A Profibus Trace - Siemens SIMATIC Ident Function Manual
For moby u, moby d, rf200, rf300
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Also See for SIMATIC Ident:
- System manual (362 pages) ,
- Function manual (142 pages) ,
- Operating manual (80 pages)
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B.6
Example of a PROFIBUS Trace
The following trace shows all frames that were sent on the PROFIBUS interface during a CM
startup or a read command. The trace is used to understand the sections Cyclic control word
between master and communications module (Page 102) to PROFIBUS/PROFINET
implementation (Page 116) and to help orientation or troubleshooting with customized
implementations of the communications modules.
Note
Using FB 45 on PROFINET
If FB 45 is used on PROFINET, the PROFINET trace is similar to the PROFIBUS trace. The
data contents are identical. The header data of the frames are different.
Startup of an ASM 456 and RESET sequence on the 2nd channel
68 07 07 68 03 02 5d 00 00 00 00 00 16
68 07 07 68 02 03 08 80 00 80 00 00 16
68 07 07 68 03 02 7d 80 00 80 00 00 16
68 07 07 68 02 03 08 80 00 80 00 00 16
68 07 07 68 03 02 5d 80 00 80 00 00 16
68 07 07 68 02 03 08 88 00 88 00 00 16
68 07 07 68 03 02 7d 00 00 00 00 00 16
68 07 07 68 02 03 08 88 00 88 00 00 16
68 07 07 68 03 02 5d 00 00 00 00 00 16
68 07 07 68 02 03 08 08 00 08 00 00 16
68 0F 0F 68 83 82 5c 33 36 5F 01 66 06 05 00 00 00 2b 02 00 16
68 05 05 68 83 82 5c 33 36 00 16
68 09 09 68 82 83 08 36 33 5f 01 66 06 00 16
68 07 07 68 03 02 7d 00 00 00 00 00 16
68 07 07 68 02 03 08 08 00 10 00 00 16
68 07 07 68 03 02 7d 00 00 00 00 00 16
68 07 07 68 02 03 08 08 00 30 00 00 16
68 07 07 68 03 02 7d 00 00 00 00 00 16
68 07 07 68 02 03 08 08 00 31 00 00 16
68 09 09 68 83 82 5c 33 36 5e 01 66 06 00 16
68 05 05 68 83 82 5c 33 36 00 16
68 0F 0F 68 82 83 08 36 33 5e 01 66 06 05 00 00 00 00 00 00 16
--- ≙ no change
FB ≙ stands for a function block, but could also be any HOST function
FB 45 for MOBY U, MOBY D, RF200, RF300
Function Manual, 07/2012, J31069-D0166-U001-A4-7618
Programming communications modules
B.6 Example of a PROFIBUS Trace
FB: ---
CM: CM startup
FB: sets the startup bit
CM: ---
FB: ---
CM: sets the command counter to 1
FB: resets the startup bit
CM: ---
FB: ---
CM: resets the startup bit
FB: RESET command to 2nd channel
FB: request for acknowledgment
CM: acknowledgment that RESET is being
processed (PROFIBUS confirmation)
FB: ---
CM: command counter for 2nd channel is
incremented to 2
FB: ---
CM: acknowledgment counter for 2nd channel is
incremented to 1
FB: ---
CM: sets presence
FB: confirmation of "RESET being processed"
FB: request for acknowledgment
CM: RESET acknowledgment
119
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