Siemens simatic s7-400 FM 450-1, User Manual, Page: 113 / 130

Errors and diagnostics
11.5 Operator error
Counter module FM 450-1
Manual, 02/2014, A5E03648739-02
113
11.5 Operator error
When do operator errors occur?
Operator errors occur if you operate the module incorrectly by specifying the wrong control
signals.
Where are operator errors indicated?
FC CNT_CTRL enters the operator error numbers in DB1. You can access this data word via
the variable name "OT_ERR_B" in your program.
Which operator errors exist?
The table below shows the possible numbers of operator errors and their meaning.
Table 11- 4 Operator error numbers and their meaning
Error code Meaning
0 No fault
1 Mode cannot be started using the SW gate.
2 Mode cannot be aborted.
4 Permitted only if OD is active
How are operator errors acknowledged?
Acknowledge the error with parameter OT_ERR_A in DB 1.