Lust CDA3000 - Master;Slave Operation; Master;-Slave Operation

Application Manual CDA3000
4-49
4 Application data sets
1
2
3
4
5
6
A
DE
EN
FR
4.6 Master/-Slave
operation
Application data sets M-S_1 to M-S_4 contain settings for Master/-Slave
operation between inverter modules. In this way the speeds of a maxi-
mum of six drives are permanently coupled together.
(1) Reference coupling
(2) Inverter module
(2.1)Master
(2.2)Slave
(3) IEC standard motor
(4) Application
Figure 4.33 Drive solution: “Master/-Slave operation”
In Master/-Slave operation the reference values of the inverter modules
are permanently coupled together. This reference coupling can be effec-
ted with up to six units, with one unit being the master. The reference
value of the master is also the guide value for the devices connected to
the master (slaves). The master transmits the reference value to the sla-
ves by way of a data telegram. In each slave the guide value received
from the master can be scaled, meaning that any desired transmission
ratios can be set. In this way it is possible to replace mechanical speed
couplings.
Note: Coupling of the electrical axles in control modes VFC and
SFC causes the motors to run at a fixed ratio. Only in the
FOR control mode do the motors run speed-synchronous.
~
~
=
CPU
~
~
=
CPU
i1
~
~
=
CPU
i2
M
3~
M
3~
M
3~
Process
FU0
FU1
FU2
(2.1)
(2.2)
(2.2)
(1)
(3)
(4)
n
1
=n
0
.
i
1
n
2
=n
0
.
i
2
n
0
(3)
(3)