Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
Page
D-99
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A
B
C
D
E
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PATTERN GEN
SETUP::MOTOR CONTROL::PATTERN GEN
Designed for all Motor Control Modes.
The pattern generator function block allows you to configure the Drive PWM (Pulse Width Modulator) operation.
Parameter Descriptions
RANDOM PATTERN
PREF: 73.01
Default: TRUE
Range: FALSE / TRUE
Designed for all Motor Control Modes, except PMAC Control Mode.
This parameter selects between random pattern (quiet motor noise) or the more conventional fixed carrier PWM strategies.
When TRUE, random pattern is enabled.
FREQ SELECT
PREF: 73.02
Default: 3000 Hz
Range: 3000 to 6000 Hz
Designed for all Motor Control Modes, see exceptions for PMAC Control Mode below.
Only for V3.3 and higher in PMAC mode : This parameter selects the pwm frequency of the output power stack if the
ENCODER is an ENDAT encoder, and the PWM FREQ PMAC = OTHERS. The accessible range is between 2000 to
4000Hz. In all others cases, this parameter is not used in PMAC mode.
This parameter selects the pwm switching frequency of the output power stack.
The higher the switching frequency, the lower the level of motor audible noise. However, this is only achieved at the expense
of increased Drive losses and reduced stack current rating.
DEFLUX DELAY
PREF: 73.03
Default: 2.0 s
Range: 0.1 to 10.0 s
Designed for all Motor Control Modes, except PMAC Control Mode.
Sets the minimum allowed delay between disabling and then re-enabling PWM production (i.e. stopping and starting the
drive).
DRIVE FREQUENCY
PREF: 73.04
Default: —.xx Hz
Range: —.xx Hz
The output frequency provided to the motor.
