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Can I use R_TRIG, F_TRIG, TRIGGER, TON, TOFF, and TP function blocks in Section 0 of a Unity / Quantum HotStandby system?

Issue:
R_TRIG, F_TRIG, TRIGGER, TON, TOFF, and TP function blocks usage in first PLC section


Product Line:
Quantum HSBY


Resolution:
No. R_TRIG, F_TRIG, TRIGGER, TON, TOFF, and TP function blocks cannot be used in Section 0 (First PLC section) of a HSBY system because their use can lead to unintended changes in state at switchover. Section 0 is the only section solved by a Standby System and is updated at the end of scan by the Primary.


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