Note
The technology controller must be activated (p2200) and configured (p2251 = 0) in order to use the function.
Negative speed setpoints should be excluded.
p2371
Closed-loop cascade control configuration / Csc_ctrl config
Access level: 3
Calculated: -
Data type: Integer16
Can be changed: T
Scaling: -
Dynamic index: -
Unit group: -
Unit selection: -
Function diagram: -
Min:
0
Max:
8
Factory setting:
0
Description:
Parameter for configuring the connection and disconnection of external motors to and from the line voltage.
Connecting external motors to the line voltage enables up to three additional drives to be controlled by the technology
controller in addition to the main drive. The complete system, therefore, comprises one closed-loop-controlled main
drive and up to three other drives, which can be controlled via contactors or motor starters. The contactors or motor
starters are switched by the converter's digital outputs (see also r2379).
Switching-in motor:
If the main drive is operated at maximum speed and the deviation at the technology controller input increases further,
the control will in addition connect external motors M1 through M3 to the line voltage. At the same time, the main drive
is ramped down to the closed-loop cascade control switch-in/switch-out speed (p2378) via the down ramp, so that the
total output power can be kept as constant as possible. During this time the technology controller is switched off.
Switching-off the motor:
If the main drive is operated at minimum speed and the deviation at the technology controller input decreases further,
the control will disconnect external motors M1 through M3 from the line voltage. At the same time, the main drive is
ramped up to the closed-loop cascade control switch-in/switch-out speed (p2378) via the up ramp, so that the total
output power can be kept as constant as possible.
Value:
0:
Closed-loop cascade control inhibited
1:
M1 = 1X
2:
M1 = 1X, M2 = 1X
3:
M1 = 1X, M2 = 2X
4:
M1 = 1X, M2 = 1X, M3 = 1X
5:
M1 = 1X, M2 = 1X, M3 = 2X
6:
M1 = 1X, M2 = 2X, M3 = 2X
7:
M1 = 1X, M2 = 1X, M3 = 3X
8:
M1 = 1X, M2 = 2X, M3 = 3X
Dependency:
See also: p2372
Note
Selecting 2X means that a motor is switched in with twice the power (as opposed to 1X, which equates to the motor
power at the converter).
p2372
Closed-loop cascade control mode motor selection / Csc_ctrl mode
Access level: 3
Calculated: -
Data type: Integer16
Can be changed: T
Scaling: -
Dynamic index: -
Unit group: -
Unit selection: -
Function diagram: -
Min:
0
Max:
3
Factory setting:
0
Description:
Parameter for selecting the control mode for switching-in and switching-out external motors.
Selection 2 and 3 support selection options for automatically interchanging the motors, which are connected to the line
supply.
Value:
0:
Fixed sequence
1:
Closed-loop cascade control after absolute operating hours
2:
Automatic replacement after continuous operating hours
Parameters
7.2 Parameter list
SINAMICS G120X converter
816
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
