Control Techniques Unidrive 1402 User Manual

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Electrical
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Menu 0
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the motor
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UL Listing
Information
Unidrive User Guide 75
Issue Number: 9 www.controltechniques.com
Select the required stop mode as follows:
For more information, see Pr 6.01 in section 10.22 Advanced
Features on page 182.
Set Pr 0.17 as follows:
For more information, see Pr 4.11 in section 10.22 Advanced
Features on page 182.
6.2.7 S-ramp
Setting this parameter enables the S ramp function. S ramp is disabled
during deceleration using Standard ramp with P control (Pr 2.04 = 2).
When the motor is accelerated again after decelerating in standard ramp
with P control the acceleration ramp used by the S ramp function is reset
to zero.
This parameter defines the maximum rate of change of acceleration/
deceleration that the drive will operate with. The default values have
been chosen such that for the default ramps and maximum speed, the
curved parts of the S will be 25% of the original ramp if S ramp is
enabled.
Since the ramp rate is defined in s/100Hz or s/1000rpm and the S ramp
parameter is defined in s2 /100Hz or s2 /1,000rpm, the time T for the
'curved' part of the S can be determined from:
Enabling S ramp increases the total ramp time by the period T since an
additional T/2 is added to each end of the ramp in producing the S.
6.2.8 Skip bands
See Pr 0.21 and Pr 0.23 Skip bands.
Use skip frequencies/speeds and skip bands to prevent the motor from
running at speeds that cause mechanical resonances in the machine.
During acceleration and deceleration, the drive passes through the skip
bands, but it does not stabilize in a skip band.
Up to two skip frequencies/speeds can be programmed.
Enter the centre frequency/speed of the band in Pr 0.20 (or Pr 0.22) Skip
frequency/speed, then enter the width of each sideband in Pr 0.21 (or Pr
0.23) Skip band.
When the value of a skip frequency is zero, the related skip band is
disabled.
0.16 {6.01} Stop mode selector
RW Txt
OL
Ú
0 to 4 (see below)
Ö
rP (1)
CL
Ú
0 to 3 (see below)
Ö
VT rP (1)
SV no.rP (1)
Open loop
COASt
(0) The motor is allowed to coast
rP (1) Ramp to a stop
rP-dcI (2) Ramp followed by 1 second DC injection
dcI (3)
AC injection braking followed by 1 second DC injection
braking
td-dcI (4)
DC injection braking for an adjustable time (see the
Unidrive Advanced User Guide).
Closed loop
COASt
(0) The motor is allowed to coast
rP (1) Ramp to a stop
no.rP (2) Stop under current limiting (no ramp)
rP-POS (3) Ramp, orientate and stop
0.17 {4.11} Torque mode select
RW Uni
OL
Ú
0 to 1
Ö
0
CL
Ú
0 to 4
Ö
0
Setting Open-loop Closed-loop
0 Frequency control Speed control
1 Torque control Torque control
2
Torque control with speed over-ride
3
Coiler/uncoiler mode
4
Speed control with torque feed-forward
0.18 {2.06} S-Ramp enable
RW Bit
Ú
0 or 1
Ö
0
0.19 {2.07} S-ramp da/dt limit
RW Uni
OL
Ú
0.0 to 3,000.0s
2
/100Hz
Ö
3.1
CL
Ú
0.000 to 30,000
s
2
/1,000rpm
Ö
VT 1.5
SV 0.03
0.20 {1.29}
0.22 {1.31}
Skip frequency/speed 1
Skip frequency/speed 2
RW Uni
OL
Ú
0.0 to 1,000.0Hz
Ö
0.0
CL
Ú
0 to 30,000rpm
Ö
0
0.21 {1.30}
0.23 {1.32}
Skip band 1
Skip band 2
RW Uni
OL
Ú
0 to 5.0Hz
Ö
0.5
CL
Ú
0 to 50rpm
Ö
5
Demanded
speed
Programmed
ramp rate
Rate of change
of S-ramp
acceleration
tim
e
T
S ramp rate of change
Ramp rate
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Control Techniques Unidrive 1402 Specifications

General

Brand	Control Techniques
Model	Unidrive 1402
Category	Controller
Language	English