Hi,

I am trying to read the values in DB with S7.Net. I have Siemens S7-1214C DC/DC/DC PLC. However I didn't get any result. For example I am trying to read bool value in DB2 which is at the adress DB2.DBX0.0  with the code given in the picture.

At the console I get :

PLC is Available and Connected

Wrongvarformat

So I can verify that PLC is connected and available. There is no problem with connection. There must be something wrong with the code or Tia Portal settings. BTW I did what I had to do when using S7.Net. I mean I granted full access(no protection) for CPU. Also I permit access with PUT/GET communication.  I also disabled "optimized block access" option from the DB properties.

So, I "guess" I did everything I am supposed to do. The code for reading the variables in PLC is right as well I guess.

Maybe my PLC is broken I don't know. I have Visual Studio 2015, .NET framework 4.5, 

 TIA Portal V13, 

This is my reference :

https://www.youtube.com/watch?v=tYTjNG8YL-c

What may have gone wrong?

Best regards,

Aydin Ozcan

Hello Mr Ozcanay;

Did you try with PLC sim?

If your code running with PLC sim, I guess PLC firmware does not support S7.Net library. In this case you can try upgrade PLC firmware (if possible) or use another libraries (Just like libnodave)

Good luck.

Murat ÖZKAN

Hi Murat,

No, I was not using PLC SIM. I was using the actual S7-1214 PLC hardware.

Could you try with PLC sim?

You can test your code is correct or not.

PLC Sim interface:

http://nettoplcsim.sourceforge.net/

Hello ozcanay

Which Firmwareversion do you use in S71200?

Bye Murof

I finally got it work via PLCSIM. So, probably the problem was CPU firmware being not up-to-date. Thanks all.

BTW is it possible to simulate 2 PLCs in in PLCSIM at the same time?