Hello Nashwa,

Can I ask you to send me an example how to read a parameter from drive Sinamics V90 with s7 1200 CPU 1214C DC/DC/DC with CB 1241 - communication module by uss protocol with this block USS RPM? 

The problem is that for this drive there is no enough information how to read parameters. I can send you the program if you want. Can you help?
Thank you in advance

Out Control

Please send to me your program to can check it


Best Regards
Nashwa

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Split from USS Protocol Instruction / USS_RPM_R /.

Hello,

you can take a look in the V20 application example, i think the V90 work with uss in the same way like the V20.

https://support.industry.siemens.com/cs/ww/en/view/63696870

Regards

Christoph

I have talked to Siemens support in Bulgaria and they told me that I need to write my own code for communication between these devices. This is new for me, can you or someone else to post in LAD Or FBD an example how to do such communication. At least what instructions from TIA Portal v13 SP1 Update 5 I can use to facilitate my work.

Thanks a lot,

Best regards,

Read the V90 instruction manual (section 7.7.2 - MODBUS communication) to give you some ideas how to do this.  If you can wait a few weeks, I'll be going through this exercise myself.

Also, see this FAQ https://support.industry.siemens.com/cs/document/47756141/how-do-you-establish-a-modbus-rtu-communication-with-step-7-(tia-portal)-for-the-simatic-s7-1200?dti=0&lc=en-WW

Well, I guess you have two options.

1.  Wait around until someone gives you code.  Not reallyy likely.

2.  Look at the FAQ and solve your own problem.  You should be able to figure it out.

I am sure that I could write my own program for  the correct telegrams, however I don't know at which address the servo driver is expecting telegram with a request for read, so "It...."(Servo driver) could understand what information should send back to PLC as a response to the request.
And there is no such information in all manuals, brochures or other additional documentation related to Sinamics V90. So I am really confused, how to proceed further.

When I have a solution I will post it! ;)

Thank you for the support anyway!

I wish you successful projects and all the best