Diagnostics and maintenance
4.8 Diagnostics in the user program
PROFINET with STEP 7
100
Function Manual, 05/2021, A5E03444486-AL
1. Evaluating the diagnostics status
Read out the diagnostics of your PROFINET IO system using the instructions "DeviceStates"
and "ModuleStates" to localize faulty stations / modules or station / modules with
maintenance demanded or maintenance required within a PROFINET IO system.
The instruction RDREC (read data record) is then used to read various diagnostics data records
directly from the module concerned and thus obtain detailed information about the error.
Num-
ber
Description
①
All individual errors are collected in a single data record on the interface module.
②
In your user program, the instruction "RDREC" reads the entire station status asynchronously
directly from the IO device.
Figure 4-15 Example: Evaluating diagnostics data records with the instruction "RDREC"
Содержание SIMATIC ET 200AL
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