ecostuxure machine expert basic the timer %MW retentive memory clearing

[alpikon]

Hi,

How to clear retentive timer memory %MW after stoping while timer not finished counting in ecostuxure machine expert basic?

[FernandoRodrigues]

Hi @alpikon 
I'm not sure if I got your question:
As soon you deactivate IN, the current time counting goes to zero.
Also, if you want to ensure after a power cycle that counting is not retained, you must unflag "Retentive"

[alpikon]

Hi,

At the moment I found one solution: (SB Coldstart) %Sx

That's let when counting stopped by reason and needs re-start timing over gain from 0.

[cgarden]

Hi, you can manually reset the retentive timer’s %MW memory by adding a line in your code to set it to zero when the machine stops or on a reset condition. Use %MWx := 0; where %MWx is the timer memory word. 

[JaY_V]

I would like to make a timer rentive but ist restating the timer once the power cycle has performed its not starting where the PLC goes power off, Any suggestion ?

[alpikon]

You want the timer to be "retentive", so when the PLC turns off and comes back on, the timer doesn't reset but resumes where it left off?

[JaY_V]

Exactly , but it's not happening 

[alpikon]

To make a "retentive" timer behavior (survive power cycles), you'll need to:

1. Manually retain the elapsed time (ET) in a retained variable.

2. Reconstruct the timer behaviour on start-up using this stored value.

3. A retained variable to store elapsed time.

4. A flag to indicate the timer was running when the PLC shut down.

[ravi_kaneria]

Yes right @alpikon you are right 
the retain function is the only for the power on condition while the in condition is off and on again that time it will work as retain timer. not after power off.

[ravi_kaneria]

batter to use counter and use compare function then you will get the result which you want.