Introduction Parameter x.00
Parameter
description format
Keypad and
display
CT Modbus
RTU
User
programming
CT Soft Menu 0
Advanced parameter
descriptions
Menu 2
Commander SK Advanced User Guide 37
Issue Number: 2 www.controltechniques.com
When parameter Pr 2.10 is set to 9 the appropriate acceleration rate is automatically selected depending on the value of parameter Pr 1.50, and so
an acceleration rate can be programmed to operate with each reference. Since the new ramp rate is selected with the new reference, the acceleration
applies towards the selected preset if the motor needs to accelerate to reach the preset.
When switching between preset speeds and using the preset acceleration ramps, the acceleration ramp used is the one associated to the target
preset speed, i.e. if switching from preset speed 3 to preset speed 4 acceleration rate 4 would be used.
If enabling and running to a preset speed using the Run Forward and Run Reverse terminals, the preset acceleration ramp used will be the one
associated to the preset speed being run to.
The jog acceleration rate is only used when accelerating towards the jog reference and when changing the jog reference.
There are eight acceleration rates programmable for normal operation, plus one for jogging. The ramp rates are expressed as a time for a change of
100 Hz on the ramp output, therefore with a programmed ramp time of 5 seconds the ramp output will reach 50 Hz from 0 in 2.5 seconds (depending
on the setting of Pr 2.39).
The deceleration rate is selected as follows.
0 Ramp rate selection by terminal input
1 - 8 Ramp rate defined by parameter number, i.e. 1 = Pr 2.21, 2 = Pr 2.22, etc.
9 Ramp rate selection by parameter Pr 1.50
Pr 2.34 Pr 2.33 Pr 2.32 Ramp defined by
000 Pr 2.11
001 Pr 2.12
010 Pr 2.13
011 Pr 2.14
100 Pr 2.15
101 Pr 2.16
110 Pr 2.17
111 Pr 2.18
2.11 Acceleration rate 1
2.12 Acceleration rate 2
2.13 Acceleration rate 3
2.14 Acceleration rate 4
2.15 Acceleration rate 5
2.16 Acceleration rate 6
2.17 Acceleration rate 7
2.18 Acceleration rate 8
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 3200.0s/100 Hz (or s/10Hz or s/1000Hz if Pr 2.39 = 0 or 2)
Default 5.0
Second motor
parameter
Pr 21.04 for parameter Pr 2.11 only
Update rate 5ms
2.19 Jog acceleration rate
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 3200.0s/100 Hz (or s/10Hz or s/1000Hz if Pr 2.39 = 0 or 2)
Default 0.2
Update rate 5ms
2.20 Deceleration rate selector
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range 0 to 9
Default 0
Update rate 5ms
NOTE
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