ALARM_8 IN PCS7

Hello everyone

I'm using Alarm_8 for generating alarms in my FB, but I have ERROR 20 (Decimal) and I dont no what to do to fix it.

the Photo of running has been attached.

Thank you very much.

Hi Vahid08,

in the manual SIMATIC System Software for S7-300/400 System and Standard Functions you can find the describe of the most SFC and SFB for S7-300/400 CPUs. And in chapter 25.6 you can find the error information of the ALARM_8.

With regards
Heisenberg

Hi Vahid08,

Error status "20" is generating because of Not enough working memory (H-System: SFB called while update in progress)

Kindly go through the below forum query, It might help you to some extent.

Work Memory

Hope it helps you!