PLC concepts
5.1 Execution of the user program
S7-1200 Programmable controller
104 System Manual, V4.2, 09/2016, A5E02486680-AK
You can program the MC-PreServo OB to contain program logic for the STEP 7 program to
execute directly before the MC-Servo OB executes.
The MC-PreServo OB allows you to read out the configured application cycle information in
microseconds.
Table 5- 14 Start information for MC-PreServo OB
TRUE indicates first call of this OB on transition from STOP to RUN
TRUE indicates the associated process image input is up to date.
PIP_Output BOOL TRUE indicates that the CPU transferred the associated process
image output to the outpus in good time after the last cycle.
Number of the distributed I/O system triggering the interrupt
Event_Count INT n: number of lost cycles
-1: unknown number of cycles lost (for example, because cycle has
CycleTime UDINT Display of the application cycle configured for the MC-Servo OB in
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