Siemens SIMATIC ET 200SP System Manual page 261

Test and service functions
13.1 Test functions
Note
Restriction during testing with breakpoints
• When you test with breakpoints, there is a risk of overwriting the cycle time of the CPU.
• If you are using technology objects and test them with breakpoints, the CPU switches to
STOP mode.
Note
F-System SIMATIC Safety
The setting of breakpoints in the standard user program results in errors in the
safety program:
• Sequence of F cycle time monitoring
• Error in communication with the fail-safe I/O
• Error during safety-oriented CPU-CPU communication
• Internal CPU error
If you still wish to use breakpoints for testing, you must deactivate
the safety mode beforehand. This will result in the following errors:
• Error in communication with the fail-safe I/O
• Error during safety-oriented CPU-CPU communication
260
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ