Cycle Time Peaks - PLCSIM

Dear user,

With recent simulations of a project, the cycle time peaks and is measured:1 second to even 12 seconds.The PLC is from an existing project on which only minor changes have been made.

Currently i'm not able to test with an actual PLC, but i'm not sure about these cycle time peaks in the simulation. The PLC has two RIO's with analog I/O which unfortunatly can't be simulated and give continuous error in the diagnostic buffer.

I've done some research and the project has OB1, 35, 80, 82, 83, 85, 86, 100, 121 and 122 programmed. This prevents the CPU from going to stop etc. but the cycle time peaks continue to exist completely random.

Does annyone have a suggestion what could be the reason behind these cycle time peaks ?

I've added two screenshots:
- Module information - cycle time
- Module information - Diagnostic Buffer

 Please be sure :

1. You download the hardware config file before simulation.
   
   
2. You are not using a virtual machine on a host PC with insufficient RAM .
   
   
3. If you have this problem with an specific project ,check which part makes the trouble.Possibly an endless loop can cause similar behavior.Check why in FB42, you have I/O access error.Is it due to indirect addressing?Temporarily disable calling of this FB and test again.

To be sure of your installed software packages, test again with a small station with an OB1.You can share your project for our reference for further investigations.

I hope it helps,

hdhosseini