how to reset timer in ladder u90?

[lankasten]

hello!

i can't found in manual how to reset timer. Is no way to put reset coil inladder u90 like in visilogic....

in timer diagram timer countinue to decremenate after start@run condition come back

When the timer's Start & Run Condition is OFF, the timer's Bit Value is also OFF.

When the timer's Start & Run Condition rises, the timer's Preset Value is loaded into the timer's Current Value.

The timer begins to run. Note that the timer's Bit Value is OFF.

If the timer's Start & Run Condition remains ON during subsequent PLC cycles, the Current Value of the timer

continues to decrement.

When the timer has decremented to 0, and the timer's Start & Run Condition is still ON, the timer's Bit Value

turns ON. Note that when the timer has finished running, its Current Value is 0.

If the timer's Start & Run Condition falls while the timer is decrementing, the timer stops running. The current

value of the timer remains.

Timer Reset takes precedence over the timer's Start & Run Condition. When the timer' Reset Condition rises, the

timer's Bit Value turns OFF. The timer's Preset Value is loaded into the Current Value, and the timer's Start &

Run Condition cannot activate the timer as long as Reset is ON.

When the timer's Reset Condition falls while the timer's Start & Run Condition is ON, the timer begins to run,

exactly the same as when the timer's Start & Run Condition rises.

Below, pressing Key #1 on the Vision keypad activates TD1, which is preset to 5 seconds. If Key #1 is held

down for 5 seconds, TD1 decrements to zero. O1 switches on.

If, however, Key #1 is released before TD1 has finished, the timer stops. When Key #1 is pressed again, TD1

again begins to decrement from 5 seconds.

do i need to reset timer if start@run condition falls?

[AlexUT]

Hi,

No, you do not need to reset it.

When the timer's Start & Run Condition is OFF, timer stop counting.

When the timer's Start & Run Condition rises again, timer preset loads and timer starts counting.

This is equivalent to reset condition.