Siemens SIMATIC User Manual

S7-300 Module data
583 Manual, 06/2017, A5E00105505-AJ
Diagnostics data of signal modules
B
B.1 Evaluating diagnostic data of signal modules in the user program
Introduction
This appendix describes the diagnostic data structure in system data. You should be
sufficiently familiar with this structure if you want to evaluate the diagnostics data of the
signal module in the
STEP 7 user program.
Diagnostics data are saved to data records
The diagnostics data for a module is stored in data records 0 and 1.
● Data record 0 contains 4 bytes of diagnostics data describing the current state of the
module.
● Data record 1 contains the 4 bytes of diagnostics data also stored in data record 0,
plus
additional module-specific diagnostics data, which describes the status of a channel or a
channel group.
Further references
For detailed information on the evaluation of the diagnostics data of signal modules in the
user program and on corresponding SFCs, refer to the
STEP 7 manuals.

Siemens SIMATIC Specifications

General

Brand	Siemens
Model	SIMATIC
Category	Control Unit
Language	English