Hi ! 

I'm looking for a "Retentive Timer block" in PCS7 APL v8.0. I need a timer which keeps track of time when a condition is true, pauses (freezes) when the condition goes false, and resumes when the condition goes true again. When the Elapsed time is equal to Preset time the output (Q) must be set.  The values goes to zero only when the Reset input goes true.

Is there a block developed for this in PCS7?    

Best regards.

Hi ! 

I did a solution in Chart using some APL blocks (AFP, TotalL, StruDiOu, StruDiIn, etc) after I compile the chart as a block type (FBXXXX and SCL code were generated). Ok, the solution works well but I would like a solution in SCL directly.

Any SCL code example, pls ?  

Best regards.

Hi Berg,

One solution you can try (which should work, but did not try this yet with a timerp block) is by using the TIMERP block. You can set the mode according to your desired functionality. When you want to freeze the timer, just make sure you set input "EN" (default invisible) to "0". This means the block is not processed anymore. When setting EN to "1", the timer should run again.

 Hi Oreca, 

Right, I will try your idea with the enable of TimerP block. 

Thanks ! 

Oreca

Hi Berg,

One solution you can try (which should work, but did not try this yet with a timerp block) is by using the TIMERP block. You can set the mode according to your desired functionality. When you want to freeze the timer, just make sure you set input "EN" (default invisible) to "0". This means the block is not processed anymore. When setting EN to "1", the timer should run again.

Hi 

The solution proposed using EN of TimerP block didn't work for me. Attached a screenshot showing how I've implemented it.

I could not think another way to use "TimerP" as a TONR (retentive). Any suggestion ?

Best Regards,

Berg.

Ahh too bad...

Then you have to create a SCL code.

Something very simple like:

If not Freeze.Value

then Time := Time + SampleTime;

End_if;

Hello All,

We can control the "TimerP" block as TonR (Retentive timer ) by controlling the block "EN" input,

The mode should be "2". Its working fine for me,

Your remaining output time will be held when you make the "EN" value as "0",

Also, The time holding concept working for me in all MODE,

Thank you for the suggestions Oreca...