Hello,

I want to configure two sinamics s120 drives as master and slave in the following way:

For Slave:

1. Setpoint addition P1155[0] = r1150 ramp output speed set point of master. Actually I will increase this value by 5% of speed setpoint coming from master to ensure to operate slave in upper torque limit.

2. Motor torque limit p1522[0] = r1480 speed controller PI torque of master.

It would be very helpful for me if anybody tell me whether this configuration will work.

Best regards,

Shyamal

DenisMor

This should work.
Instead of r1480, you can also use r79 total torque setpoint.

Hello guys,

very nice thread, I am trying to understand this configuration, but I don't get it. This "master/slave" is not some kind of ready/made siemens scheme right? We just make it in a custom way, by setting specific parameters for each drive in a specific state, so that one drive is controlled according to the state of the other... right?

Now I'm trying to find for example this r1150 parameter but I can't find it not even in the expert list of the drive.. 

Can somebody enlighten us newbies with this control scheme? The basic idea is, that the speed controller of the master controls directly the current controller of the slave and the speed controller of the slave is totally deactivated, or just receiving a different speed setpoint? And why should the slave have all the time more speed setpoint than the master? Would't it then be always accelerating with respect to the master? And if the motors are on the same shaft would't that create problems?

I am confused..