Inovance MD500T75G - Page 184

7. Description of Parameters MD500 User Manual
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7.8.6 Master and Slave Control
The master and slave control is designed for the multi-drive application, where the system is driven by multiple AC drives and the
motor shafts are coupled by gear, chain or conveyor belt.
The load is averagely allocated to the AC drives in the master and slave control mode. The external control signal need be
connected to the master only, and the master controls the slaves via serial communication.
The master must be in the speed control and the slaves follow the torque or speed reference of the master.
ƕ When the motor shafts are connected rigidly by chain or gear, the slaves must adopt the torque control mode to remove the
speed difference amongst the drives.
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amongst AC drives is allowed.
When the master and slaves are in the speed control, the droop rate must be used. See Figure-56.
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n
3
22
3
3
3
External control
signal
Main power
Monitoring of
the slave faults
Main power
Master and
slave
connection
n
3
22
3
3
3
External control signal
Main power
Monitoring of the
slave faults
Main power
Master and
slave connection
Rigid connection of the master and slave
x The master is in speed control.
x The slave follows the torque reference of the master.
Flexible connection of the master and slave
x The master is in speed control.
x The slave follows the speed reference of the master.
WARNING
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ƕ Connect all the external control signals to the master only.
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