Siemens SINAMICS Configuration Manual page 107

PROFINET-based diagnostics
For PROFINET, to transfer PROFIdrive message classes, channel diagnostics (Channel
Diagnosis) are used (see PROFINET IO specification (http://www.profibus.com)).
A message always comprises the following components in this specific sequence:
● Block Header (6 Byte)
– Blocktype
– Blocklength
– BlockversionHigh
– BlockversionLow
● API (4 Byte)
● Slot Number (2 Byte)
● Sub Slot Number (2 Byte)
● Channel Number (2 Byte)
● Channel Properties (0x8000) (2 Byte)
● User Structure Identifier (2 Byte)
● Channel Diagnosis Data (6 Byte)
– Channel Number (2 Byte)
– Channel Properties (2 Byte)
– Channel Error Type (2 Byte)
Overview:
Figure A-5 Components of a message
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Configuration Manual, 08/2017, A5E36912609A
Communication
A.1 Communication
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