TOF
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TOF
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IEC / CEI 1131-3 Compliant
Asserting the input signal IN of this device immediately activates the Q output. At this point, releasing the input IN will start the time elapsing. When the programmed time, applied to the input PT, is elapsed and the input IN is still de-asserted, the Q output become FALSE. This condition will be keeped until the input IN is remains de-asserted.
If the IN input is asserted again before time elapsing, the time counting will be cleared and the Q output remains ON.
The ET output pin reports the current elapsed time.
Net plugs
Plug |
Description |
IN |
A TRUE condition on this input starts the TOF timer |
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PT |
To this input user must apply the programmed time. User should use an IDENT object to enter a time constant |
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Q |
This output become TRUE after an high to low transition on pin IN and if the programmed time is elapsed |
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ET |
This output reports the current elapsed time |
See also : TP, TMI, TON, TSQ , IDENT