Siemens SIMATIC S7 F User Manual

Programming
Fail-Safe Systems
5-30 A5E00085588-03
5.3.9 Assigning Parameters to the F Cycle Time Monitoring
The F_CYC_CO Block is automatically placed and configured during compilation.
If a Task is found to be missing, the F_CYC_CO a Chart and Run-time group will
be placed with the F_CYC_CO block. During this compilation and any further
compilations where the MAX_CYC parameter is invalid, a dialog box will be
presented to request a valid value. The default value of the dialog box will be a
suggested value.
!
Safety Note – Default MAX_CYC
The default setting for the maximum cycle monitoring time is 3s. Please check
whether this setting is suitable for your process and, if required, change it.
Changing the F Cycle Time
After the OB3x cycle times have been changed, the Safety Program must be
recompiled. This is necessary at least if, as a result, an F_TESTM block might
have to be moved to another OB. (At compilation the F_TESTM block is always
automatically placed in the OB with the longest cycle time.)
Note
It is not possible to download changes in RUN mode after changes have been
made to the F cycle time.

Siemens SIMATIC S7 F Specifications

General

Brand	Siemens
Model	SIMATIC S7 F
Category	Controller
Language	English