K&R GT600-4T132G User Manual page 184

6. Description of Parameters
6.8.6 Master and Slave Control
The master and slave control is designed for multi-drive application, where system is driven by
multiple AC drives and motor shafts are coupled by gear, chain or conveyor belt.
The load is averagely allocated to AC drives in master and slave control. The external control
signal need be connected to the master only, and the master controls the slaves via
communication.
The master must be in speed control and the slaves follow the torque or speed reference of the
master.
●
●
When master and slaves are in speed control, droop rate must be used.
Figure 6-55 Rigid/Flexible connection of the master and slave
Rigid connection of the master and slave
 The master is in speed control.
 The slave follows the torque reference of the master.
External control signal
Main power
6
Monitoring of
the slave faults 2
Main power
- 182 -
When motor shafts are connected rigidly by chain or gear, the slaves must work in torque
control to remove speed difference amongst drives.
When motor shafts are connected flexibly, the slaves must work in speed control because
slight speed difference amongst AC drives is allowed.
n
3
3
2 Master and
slave connection
3
3
To avoid control conflict, please:
CAUTION
●
Connect all the external control signals to the master only.
●
Do not use the operating panel or the field bus to control the slave .
Flexible connection of the master and slave
The master is in speed control.
The slave follows the speed reference of the master.
External control signal
n
Main power
3
2 Master and
slave connection
Monitoring of
2
the slave faults
3
Main power
3
3