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Example - Ladder Diagram

TMON​


The TMON instruction starts from a WORD value, v, and counts down continuously to 0. The time is saved in a timer data register, t. If the instruction reenergizes, the value of TC continues to count down to 0.

Ladder Diagram Example​


When the contact M0.6 is powered ON, the data register TC.4 counts down from 110.



While the data register TC.4 counts down, the timer contact T.4 is powered ON.
As a result, the coil Y4.0 is energized.



When the contact M0.6 is powered OFF and the value of the data register TC.4 is greater than 0, the data register TC.4 continues counting down to 0.
As a result, the timer contact T.4 remains powered ON, and the coil Y4.0 remains energized.



When the value of the data register TC.4 is 0, the timer contact T.4 is powered OFF, and the coil Y4.0 is deenergized.


Memory Monitor​


This is the result of the data register TC.4 counting down to 0.


This is the result of the timer contact T.4 once the value of TC.4 is 0.