Structure Of The Diagnostic Data Using A 4 Channel Mixed Module As An Example - Siemens SIMATIC ET 200S Manual

Commissioning and Diagnostics
Structure of the diagnostic data
Example: 4 channel mixed module
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Bytes 8-11
Bytes 12-15
Bytes 16-19
Bytes 20-23
Byte 24
Byte 25
Byte 26
Byte 27
Bytes 28-31
Bytes 32-35
Bytes 36-39
Bytes 40-43
1
These bytes only appear if the diagnosed module
is a mixed module; bit 7 is then set in byte 4.
Figure 7-9
The number of channel-specific diagnostic bytes depends on the number of
channels in the module. However, at least channel 0 must exist. The minimum
length of data record 1 is therefore 12 bytes.
If, for example, you have a mixed module with 1 input channel and 2 output
channels, the second information block begins at byte 12. In this example, the total
length of the diagnostic data is 24 bytes.
7-26
B#16#00
B#16#00
B#16#20
Structure of the diagnostic data using a 4 channel mixed module as an
example
Module fault
Module class
Channel type
Length diagn. information
Number of channels
Faulty channels
(channel vector)
Single fault, channel 0
Single fault, channel 1
Single fault, channel 2
Single fault, channel 3
Channel type
Length diagn. information
Number of channels
Faulty channels
(channel vector)
Single fault, channel 0
Single fault, channel 1
Single fault, channel 2
Single fault, channel 3
ET 200S IM 151-7 CPU Interface Module
Information block
Channel-specific
diagnostics
1
Information block
Channel-specific
1
diagnostics
A5E00058783-04