Modbus with LMV 51 and ALZ 5 process value send and receive

Hallo , 

Could you open zip folder , then you can understand what i want to do. I want to receive  and send ALZ 5 Input output  process value via Modbus communication and for this i used Siemens S7 400. 

From internet i saw they used same function block for step 7 400.

Hallo Kaulquappe, 

Thanks for your reply.  Yes you write  but i am totally new with this. 

I can explain you what i want to do . My PLC Step 7 400 and My communication system Modbus. 

I want to read and write Process input and out value vai Modbus communication and PLC can read this Process value. 

Please see the one picture what i attach now. Tell me which way i can do that.  

Hello Kmruhl;

There is a lot of confusion in your request,  and by not answering Kaulquappe's questions you make it even more difficult to help you out.

So, from research we did on the forum in recent threads, we know that the LVM51 supports Modbus RTU (serial) communications, so the hardware you are planning to use is not adequate. See the following link for some hints and documents:

https://support.industry.siemens.com/tf/us/en/posts/communication-with-siemens-lmv51-burner/143075/?page=0&pageSize=10

Next point: what experience do you have with Modbus RTU communications? If you want to know how you will request data from your LVM51, you should take a few minutes to read this Modbus primer, written by our friend smiffy:

https://support.industry.siemens.com/tf/us/en/posts/modbus-general-description/66876/?page=0&pageSize=10

Hope this helps, 

Daniel Chartier 

Hallo kaulquappe/Daniel 

Thanks for your help, 

I want to use for Modbus Communication With TCP Ethernet and with Port. But i dont want to use CP card. 

My PLC Step 7 400 and Communication Modbus TCP Ethernet Port  without CP . 

Hallo,

Thanks for Reply , You meant that it is not possible for Modbus TCP Communication  between PLC to ALZ 5 Unit  Receeive and send Process Value.

If not possible then could you tell me how i can do that, I'm little bit confused about what they have written because i am new with this  , if you have sample program then it would be help for me.

P.S: I want to implement communication  Modbus TCP/IP my system . I have CPU S7 400 and ALZ 5 unit. For this could you give me sample code or way.