HI,

 Kaulquappe where is example ? You have mention that it should be on the web page you linked but i found there only FBs and manuals. Are you sure there is some examples for it ?

Regards

Stanislaw

Hello ned;

Have a look at these:

Sample program ET 200S 1SI MODBUS zXX21_11_1SI_MODBUS.zip for STEP 7 (TIA Portal)

https://support.industry.siemens.com/cs/ww/en/view/99742035

Serial Communication with ET 200S 1SI Module via PROFIBUS/PROFINET CP (for Step 7 v5.x)

https://support.industry.siemens.com/cs/ww/en/view/26263724

If you need more, use the Search Box at the right of this page, using for example "1SI Modbus sample" as a search term. When the Product Support pages open, filter with "Application Examples".

Hope this helps,

Daniel Chartier

Hello,

I've tried this sample and works just fine with only one SI module.

However, I have five of them and this does not work very well. I mean, I have made the code for the communication with all the equipments on the modbus network with sucess.

But after some time, the PLC goes into failure (cycle time exceeded) as long as the communicarion program is enable.

Do you have any thoughts about what is going wrong? 

Thanks in advanced.

I have 5 modules because not all equipment has the same communication settings.

I also have equipment too far from the PLC, so several ET200 and several modules.

But the main problem is that the PLC goes into error whenever the communications are enabled and for this application it is important that this does not happen.