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MMS communication transfers variables between AC800M controllers, using control network. Both controllers should be connected to this network by means of CN1 or/and CN2 if it is redundant network, with unique IP address.
I'm not quite sure what is ES and what do you mean with "control", looking in your previous questions.
Basically, after you exchange the variables, use them in each controller, based on logic, created for that.
Look for example the following post, which explains such (many other post exists in AKS - type MMS in search):
"> with laptop having control builder"
OK - so finally we start to get to what you should have asked first ......
You have an 800xA system on your PM866 but a Standalone Control Builder on your PM851A and you want to get the two things talking together. Yes, you can do this.
- Profibus is an IO bus, not a programming network. You cant program a PLC over profibus. ( No you cant program a Siemens PLC over profibus either. Siemens just "cheat" and let you use the same port for 2 different protocols and switch Masters on and off. Other PLC's do not play well when you try this)
- You can only program the AC800M over Ethernet.
- The PM866 and the PM851A can communicate via MMS. It doesnt matter if one of these controllers is not part of the 800xA system - it still works.
- You can program the PM866 and the PM851A with the same control builder PC but you need two different versions of control Builder. You would need to install BOTH versions of Control Builder ( Compact for the PM851A and Proffesional for the 800xA PM866). You still need an ethernet connection to the PM851A.
- Run an ethernet connection to the PM851A. Once you've done that you can also connect the PM851A to the 800xA system using PLC connect and integrate it to your HMI.
Honestly, its a bad solution. Just buy a license for the PM851A and integrate it to the 800xA system properly. It will be cheaper in the long run. I've seen many customers try to mix 800xA systems with standalone AC800M Compact products and its ALWAYS a mess.