C actions stop executing after some time

Hello everyone,

I have a question about the C scripts in WinCC V7.5. My C scripts stop executing after some time, and the only way to fix them is to open them and save them. Why is this happening?

Also, some C scripts with cyclic triggers do not work, for example I have a C script that is very simple(about 5 lines), and it has a cyclic trigger of 10 seconds. However, this script doesn't execute after 10 seconds, it needs about 2-3 minutes to execute.

What can I do to fix this issue?

Hello Murof,

First of all, thank you for replying to my thread. I can not seem to find anything relevant to this issue in the WinCC_SyS log files. I have uploaded them down below.

Before I made some adjustments, I was getting the Script Overflow error. The issue was that I was using a cyclic trigger for every script that unpacks the PLC data. I changed this to a script that flips a binary tag, and have set the scripts that unpack data from the power plants' PLCs to execute upon the change of this binary tag.

However, the script that is used to flip the binary tag has a cyclic trigger of 10 seconds.

The problem is that this script sometimes doesn't execute every 10 seconds.

After this adjustment, the script queue is very small, ranging from 0 to 100 scripts in the queue. Before this, the queue used rise exponentially.