Hello everyone

I have a problem with some Inputs.

Now I am simulating PLC Program in PLCSim. Because of simulating in office, I had to write an extra FC to modify Valve Sensors Inputs to 1 and I did it. I mean when the program writes "TRUE" over Valve Outputs, The FC writes "TRUE" over the Valve Sensors so the program skips controlling if the valves are closed or open, without an alarm.

But while running PLCSim and monitoring from TIA Portal, I see some inputs are 1 and 0 at the same time ( PLCSim doesn't write over Input btw)

Here is a screenshot

OS: Windows 10 Pro 1903
TIA Portal V13 SP2 Update3
SIMATIC S7-PLCSIM V13 SP2

CPU S7-1500-2 PN (which is being simulated)
6ES7 515-2AM01-0AB0
V1.8

And about realpars.com and this forum,

adding photos is a little hard. Please make it simple little more

I found my solution in video 212 https://learn.realpars.com/watch-and-force-table-in-tia-portal/videos/how-to-modify-an-input-value-in-your-plc-program-part-2

The reason is that the FC which I wrote for modifying inputs is coming between first FC Above in the picture and second FC below in the picture. So while PLC is executing the program,

first, it reads PLCSim inputs as ZERO (false)
then execute first FC (above) with INPUT = 0
then changes it to ONE (true) and writes to the PII
then execute second FC (below) with INPUT = 1

So I solved the problem by changing the network of my FC which is between two others and put it all of the above

Thanks to Realpars Team for these precious videos. You all are doing a very very well job

Wow! Great job on figuring out the answer to your question, especially since you found the answer in another Realpars video! The PLC simulator emulates a hardware PLC and is pretty close to giving the same performance and operation. The order of execution and update of the PII ad PIQ tables are exactly the same and your solution was the correct way to overcome the limitations of the way the CPU executes..