With STEP 7, you can set a minimum cycle time for S7-400 CPUs and the CPU 318. This is useful in the following situations:
• When the interval at which program execution starts in OB1 (main program scan) should always be the same or
• When the process image tables would be updated unnecessarily often if the cycle time is too short.
The following figures show the function of the cycle monitoring time in program processing in CPUs up to 10/98 and in CPUs from 10/98.
