Hello

I'm currently working on an AGV project and I'm willing to use two s7 1200 PLCs 
one of them will be the master that will read sensors from around a warehouse and it will send orders to the other PLC which is installed in the AGV to control the motors and move it.
I'm willing to use IWLAN to connect both PLCs but I still cant understand how to establish the connection between them, software speaking (tia portal) so if anyone can help me with any information or correct me if I have a problem I will be thankful.

Hello najd;

Setting your "slave" CPU as a Profinet i-device (connectef to the "master" as IO-controler) seems the easiest way. You can exchage up to 1440 bytes between them, which would allow the transmission of set points, signals and data between the two.

Look at the following Application Example for guidance:

https://support.industry.siemens.com/cs/us/en/view/109478798

For information on IWLAN you should start by consulting the following manual:

https://support.industry.siemens.com/cs/ww/en/view/90880063

Hope this helps,

Daniel Chartier 

Thank you daniel for your help 

But can I use the PUTGET after  setting the "slave" and the "master" cpu ?

Hello naid;

PUT/GET instructions are peer-to-peer connections, diferent from Profinet "master/Slave".

The important thing if you want to understand PUT/GeETis that they use unilateral connections, that is, they are only configured on one of the partners. If you create PUT and GET functions on S7-1200(1), you create a connection to an Unspecified partner; you do absolutely nothing in S7-1200(2).

Also, you can only send and receive 160 bytes between the 2 CPUs over PUT/GET instructions.

Follow the hints in the following video (from YouTube):

https://www.youtube.com/watch?v=4k_k8GZuUDk

Hope this helps,

Daniel Chartier

Hello Daniel 

I understand that PUT/GET won't help me with my project, so I followed the manual you gave me about "I-Device Function in Standard PN Communication"

and after following the steps exactly in the manual I couldn't get a connection when monitoring the watch tables.

Should I use PNIO_SEND and PNIO_RECV ? because as I understood they should be used in s7-300 only.

I know my questions may be a bit weird but I'm new with PLCs and this is my school project.

Hi

you also can use an Open User communication like this_

https://support.industry.siemens.com/cs/ww/de/view/109747710

Bye Murof