Siemens SIMATIC Operating Instructions Manual page 143

Bytes 2 and 3
The following figure shows the content of bytes 2 and 3 of the diagnostic data.
Figure A-2
Bytes 4 to 6
The following figure shows the content of bytes 4 to 6 of the diagnostic data.
Figure A-3
4/8 F-DI/4 F-DO:
For the 4/8 F-DI/4 F-DO module, the diagnostic data are separated according to inputs and
outputs. The diagnostic data for the inputs are in bytes 4 to 23 and the diagnostic data for
outputs are in bytes 24 to 43.
You can determine whether the module has diagnostic data in bytes 24 to 43 by evaluating
bit 7 in byte 4.
F-Switch:
For the F-Switch electronic module, the diagnostic data are divided according to inputs and
outputs. The diagnostic data for the inputs are in bytes 4 to 15, and the diagnostic data for
outputs are in bytes 16 to 31.
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
Bytes 2 and 3 of Diagnostic Data
Bytes 4 to 6 of Diagnostic Data
Diagnostic Data of Fail-Safe Modules
143