Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D Page D-47
8
9
10
11
B
C
D
1
2
3
4
5
6
7
E
Parameter Descriptions
AUTO BOOST
PREF: 21.04 Default: 0.00 % Range: 0.00 to 25.00 %
This parameter allows for load dependent stator resistance voltage drop compensation. This correctly fluxes the motor (under
load conditions) at low output frequencies, thereby increasing available motor torque. Auto boost can be set in addition to fixed
boost.
The value of the AUTO BOOST parameter determines level of additional volts supplied to the motor for 100% load.
Setting the value of auto boost too high can cause the Drive to enter current limit. If this occurs, the Drive will be unable to
ramp up in speed. Reducing the value of auto boost will eliminate this problem.
ACCELRTN BOOST
PREF: 21.08 Default:0.00 % Range: 0.00 to 25.00 %
This parameter provides an additional amount of fixed boost when the drive is accelerating. This can help when starting
heavy/high stiction loads.
ENERGY SAVING
PREF: 21.09 Default: FALSE Range: FALSE / TRUE
When set TRUE, the demanded volts are reduced to minimise energy consumption if the drive is operating in a steady state at
light load.
USER FREQ 1 to 10
PREF: 21.10, 21.12, 21.14,
21.16, 21.18, 21.20, 21.22,
21.24, 21.26,21.28
Default: Refer to Parameter
Table
Range: 0.0 to 100.0 %
These parameters provide 10 frequency points, which together with the USER VOLTAGE parameters, provide the user defined
voltage profile. (USER FREQ n, USER VOLTAGE n) provide up to 10 (x,y) points on this profile. The USER FREQ
parameters are defined as a percentage of the BASE FREQUENCY parameter (refer to the MOTOR DATA function block).
USER VOLTAGE 1 to 10
PREF: 21.9, 21.11, 21.13,
21.15, 21.17, 21.19, 21.21,
21.23, 21.25,21.27, 21.29
Default: Refer to Parameter
Table
Range: 0.0 to 100.0 %
These parameters provide 10 voltage points, which together with the USER FREQ parameters, provide the user defined voltage
profile. (USER FREQ n, USER VOLTAGE n) provide up to 10 (x,y) points on this profile. The USER VOLTAGE parameters
are defined as a percentage of the MOTOR VOLTAGE parameter (refer to the MOTOR DATA function block).
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