Sinamics link between CU3210-2-DP

Hello all,

I have a question concerning the Sinamics link between CU3210-2-DP. I have 4 drives and every time one of them is the master and the rest the slaves. When one is the master, needs to send his actual torque to the slaves for enabling the droop. 

So the problem is that I would like that when one is the master to send his torque to the rest, but the slaves not to send to the master since the master does not require droop. But there is flexibility of whom is the master. Every drive can be a master or a slave, so I want to activate every time whether one drive will receive or transmit via CBE20 sinamics link. 

Is this possible? I thought to do it by deactivating the sinamics link to the master via p8837 everytime with the input that defines whether one is a master or not, but that would mean that does not transmit also. 

Is there anyway to do that, like in the DCM drives?

Thanks a lot. 

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Split from Sinamics link with CBE20.

I am working on a problem very similar to yours. I will have one master and five slaves. Some slaves will be on different CU320 and need to be able to change the master during runtime in case one of the drives is out of service. Torque setpoint will be transmitted via Sinamics Link.

Curious is you ever found a solution.

My proposed solution is to dynamically change the receive parameters

p8872 - Send Node

p8870 - Receive PZD

dynamically from a master PLC

After testing I realized that this won't work because these parameters can't be changed dynamically at runtime. I'll probably use a multiplexor to select the master at runtime.

https://support.industry.siemens.com/cs/ww/en/view/109477831

OA_Application is possible...

Please refer to link site..