Introduction
Parameter
x.00
Parameter
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PLC Ladder
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CTSoft Menu 0
Advanced parameter
descriptions
Menu 2
Commander SK Advanced User Guide 53
Issue Number: 9 www.controltechniques.com
When parameter Pr 2.20 is set to 9 the appropriate deceleration rate is automatically selected depending on the value of parameter Pr 1.50, and so a
deceleration rate can be programmed to operate with each reference. Since the new ramp rate is selected with the new reference, the deceleration
applies towards the selected preset if the motor needs to decelerate to reach the preset.
When switching between preset speeds and using the preset deceleration ramps, the deceleration ramp used is the one associated to the target
preset speed, i.e. if switching from preset speed 3 to preset speed 4 deceleration rate 4 would be used.
If enabling and running to a preset speed using the Run Forward and Run Reverse terminals, the preset deceleration ramp used will be the one
associated to the preset speed being run to.
The jog deceleration rate is only used when the drive is changing speed because the jog reference has changed or to stop from the jog reference. It
is not used to go from the jog to the run state. This prevents the fast ramps normally used with jog from being used when changing between running
and jogging.
There are eight deceleration 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 go from 50 Hz to 0 in 2.5 seconds (depending
on the setting of Pr 2.39).
Pr 2.37 Pr 2.36 Pr 2.35 Ramp defined by
000 Pr 2.21
001 Pr 2.22
010 Pr 2.23
011 Pr 2.24
100 Pr 2.25
101 Pr 2.26
110 Pr 2.27
111 Pr 2.28
2.21 Deceleration rate 1 {04}
2.22 Deceleration rate 2
2.23 Deceleration rate 3
2.24 Deceleration rate 4
2.25 Deceleration rate 5
2.26 Deceleration rate 6
2.27 Deceleration rate 7
2.28 Deceleration rate 8
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 3200.0 s/100 Hz (or s/10Hz or s/1000Hz if Pr 2.39 = 0 or 2)
Default 10.0
Second motor
parameter
Pr 21.05 for parameter Pr 2.21 only
Update rate 5ms
2.29 Jog deceleration rate
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 3200.0 s/100 Hz (or s/10Hz or s/1000Hz if Pr 2.39 = 0 or 2)
Default 0.2
Update rate 5ms
2.30 Acceleration selected indicator
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111 1
Range 1 to 8
Update rate 5ms
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