9300 Servo PLC
System blocks
2.15 System markers (SYSTEM_FLAGS)
2-68
9300ServoPLC EN 1.4
SYSTEM_bTogCycleTask
• This system marker toggles with the cyclical task:
1. cycle = FALSE
2. cycle = TRUE
3. cycle = FALSE
4. cycle = TRUE
etc.
SYSTEM_nTaskInterval
• This system marker shows the interval for the current task, with a resolution of 250 µsec.
– If, for instance, a 10-millisecond task is being processed, the system marker indicates 40
(10 msec = 40 x 250 µsec).
– If a different type of task is being processed, instead of an interval task, the system marker
indicates 0.
SYSTEM_nTaskID
• This system marker shows the task-ID for the current task.
SYSTEM_b1LoopCyclicTask/SYSTEM_b1Loop Task X
• These system markers only have the state TRUE during the first cycle of the particular task.
– After the first cycle of the specific task, the system variable is set to FALSE.
– A change back to the TRUE stae will occur after a reset, or a fresh start of the program in the
target system.
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