Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
Menu 2
Unidrive SP Advanced User Guide
49
Issue Number: 10 www.controltechniques.com
When Pr
2.20
is set to 0 the deceleration ramp rate selected depends on the state of bit Pr
2.35
to Pr
2.37
. These bits are for control by digital inputs
such that ramp rates can be selected by external control. The ramp rate selected depends on the binary code generated by these bits as follows:
When Pr
2.20
is set to 9 the appropriate deceleration rate is automatically selected depending on the value of 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.
Closed-loop vector and servo
If an deceleration rate is selected where the parameter is set to 0.000 the deceleration ramp is disabled and the reference changes instantly to its new
value during deceleration.
Open-loop
If either an acceleration or deceleration rate is selected where the parameter is set to 0.0 in open-loop mode, the ramps are disabled (for both
acceleration and deceleration). This disables the voltage controller, used for standard ramp and mains loss ride through, and the frequency based
current limits.
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.
02.37
02.36
02.35
Ramp defined by
0
0
0
Pr
2.21
0
0
1
Pr
2.22
0
1
0
Pr
2.23
0
1
1
Pr
2.24
1
0
0
Pr
2.25
1
0
1
Pr
2.26
1
1
0
Pr
2.27
1
1
1
Pr
2.28
2.21
Deceleration rate 1
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
Drive modes
Open-loop, Closed-loop vector, Servo
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
1
1
1
Closed-loop vector and Servo DP = 3
Range
Open-loop
Closed-loop vector, Servo
0.0 to 3,200.0 s/100Hz
0.000 to 3,200.000 s/1000rpm
Default
Open-loop
Closed-loop vector
Servo
10.0
2.000
0.200
Second motor
parameter
Open-loop, Closed-loop vector, Servo
Pr
21.05
for Pr
2.21
only
Update rate
4ms read
2.29
Jog deceleration rate
Drive modes
Open-loop, Closed-loop vector, Servo
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
1
1
1
Closed-loop vector and Servo DP = 3
Range
Open-loop
Closed-loop vector and servo
0.0 to 3,200.0 s/100Hz
0.000 to 3,200.000 s/1000rpm
Default
Open-loop
Closed-loop vector, Servo
0.2
0.000
Update rate
Background read
Summary of Contents for unidrive sp
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