Usage Example of The Control Flags

Following are some example of control flags usage, assuming the SFC POU is named Main:

• Hold (freeze):

Main_HOLD_SFC := TRUE;

• Restart from hold state:

Main_HOLD_SFC := FALSE;

• Restart form initial state of a SFC block in hold state:

Main_RESET_SFC := TRUE; Main_HOLD_SFC := FALSE;

• Reset to initial state and instant restart of SFC block:

Main_RESET_SFC := TRUE; (* automatic reset from compiler *).