Parker AC890PX Series, Engineering Reference

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A p p e n d i x D : P r o g r a m m i n g
D-119
AC890PX AC Drive
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.
SRAMP ACCEL PREF: 100.07 Default: 10.0 Range: 0.00 to 100.00 /s²
Sets the acceleration rate in units of percent per second², i.e. if the full speed of the machine is 1.25m/s then the acceleration will be:
1.25 x 75.00% = 0.9375m/s²