Siemens ET 7Y Series Spezifikationen Seite 108

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Commissioning and Diagnostics
7-26
ET 200S IM 151-7 CPU Interface Module
A5E00058783-04
Structure of the diagnostic data
Byte 0
Byte 1 Module class
Byte 2
Byte 3
Byte 4
Byte 5 Length diagn. information
Channel type
Information block
Byte 6
1
These bytes only appear if the diagnosed module
is a mixed module; bit 7 is then set in byte 4.
Faulty channels
(channel vector)
Module fault
B#16#00
B#16#00
Byte 7
Number of channels
Channel-specific
diagnostics
Bytes 8-11
Bytes 12-15
Single fault, channel 0
Bytes 16-19
Bytes 20-23 Single fault, channel 3
Single fault, channel 2
Single fault, channel 1
Byte 24
Byte 25
Channel type
Information block
1
Byte 26
Faulty channels
(channel vector)
Byte 27
Number of channels
Channel-specific
diagnostics
1
Bytes 28-31
Bytes 32-35
Single fault, channel 0
Bytes 36-39
Bytes 40-43 Single fault, channel 3
Single fault, channel 2
Single fault, channel 1
B#16#20
Example: 4 channel mixed module
Length diagn. information
Figure 7-9 Structure of the diagnostic data using a 4 channel mixed module as an
example
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.
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