Scan time is too long

[Kojekude]

Hi,

In my Unilogic programme, Scan time is between 6-9ms, with Ladder Time Max about 2.7ms. But sometimes, aperiodically, Scan time is 35-38ms, while Ladder time is the same. Never 15 or 20 or 25ms, always 35-38ms. I need Scan time to be less then 10ms. How to solve this?

 

[Ofir]

Hi,

Only by viewing the application it will be possible to understand why the scan will jump to 35-38ms.

There are several actions that might cause the scan time to increase such as loops (Jump to region) , handling data tables such as insert row or remove row that will need to copy large amount of memory etc..