Parker ac890 - Page 525

D-129 Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
REFERENCE RAMP
SETUP::SEQ & REF::REFERENCE RAMP
This function block forms part of the reference generation. It provides the facility to control the rate at which the Drive will
respond to a changing setpoint demand.
Parameter Descriptions
RAMP TYPE
PREF: 100.01
Default: 0
Range: See below
Select the ramp type:
Enumerated Value : Ramp Type
0 : LINEAR
1 : S
ACCEL TIME
PREF: 100.02
Default:
Range: 0.0 to 3000.0 s
The time that the Drive will take to ramp the setpoint from 0.00% to 100.00%.
DECEL TIME
PREF: 100.03
Default:
Range: 0.0 to 3000.0 s
The time that the Drive will take to ramp the setpoint from 100.00% to 0.00%.
SYMMETRIC MODE
PREF: 100.04
Default: FALSE
Range: FALSE / TRUE
Select whether to use the ACCEL TIME and DECEL TIME pair of ramp rates, or to use the SYMETRIC RATE parameter to
define the ramp rate for the Drive.
SYMMETRIC TIME
PREF: 100.05
Default: 10.0
Range: 0.0 to 3000.0 s
The time that the Drive will take to ramp from 0.00% to 100.00% and from 100.00% to 0.00% when SYMETRIC MODE is TRUE.
SRAMP CONTINUOUS
PREF: 100.06
Default: TRUE
Range: FALSE / TRUE
When TRUE, and S ramp is selected in RAMP TYPE, forces a smooth transition if the speed setpoint is changed when
ramping. The curve is controlled by the SRAMP ACCEL and SRAMP JERK 1 to SRAMP JERK 4 parameters. When FALSE,
there is an immediate transition from the old curve to the new curve.