Safety
Information
Introduction
Product
Information
System
configuration
Mechanical
Installation
Electrical
Installation
Getting
Started
Basic
parameters
Running
the motor
Optimization
SMARTCARD
operation
Onboard
PLC
Advanced
parameters
Technical
Data
Diagnostics
UL Listing
Information
Unidrive SPM User Guide
257
Issue Number: 3 www.controltechniques.com
Example of uncoiler operation:
This is an example for an uncoiler operating in the positive direction. The
final speed demand should be set to a level just above the maximum
normal speed. When the resultant torque demand is negative the
uncoiler will apply tension and try and rotate at 5rpm in reverse, and so
take up any slack. The uncoiler can operate at any positive speed
applying tension. If it is necessary to accelerate the uncoiler a positive
resultant torque demand is used. The speed will be limited to the final
speed demand. The operating area is the same as that for the coiler and
is shown below:
4: Speed control with torque feed-forward
The drive operates under speed control, but a torque value may be
added to the output of the speed controller. This can be used to improve
the regulation of systems where the speed loop gains need to be low for
stability.
13.21.5 Stop modes
Open-loop
Stopping is in two distinct phases: decelerating to stop, and stopped.
Once modes 3 or 4 have begun the drive must go through the ready
state before being restarted either by stopping, tripping or being
disabled.
If this parameter is set to DiASbLE (5), the disable stopping mode is
used when the run command is removed. This mode will allow the drive
to be started immediately by re-applying the run command. However, if
the drive is disabled by removing the drive enable (i.e. via the Enable
SAFE TORQUE OFF (SECURE DISABLE) input or Pr
6.15
Drive
enable
) then the drive cannot be re-enabled for 1s.
Closed loop vector and Servo
Only one stopping phases exists and the ready state is entered as soon
as the single stopping action is complete.
The motor can be stopped with position orientation after stopping. This
mode is selected with the position controller mode parameter (Pr
13.10
).
When this mode is selected Pr
6.01
has no effect.
Defines the current level used during DC injection braking as a
percentage of motor rated current as defined by Pr
5.07
.
6.01
Stop mode
RW
Txt
US
OL
Ú
COASt (0), rP (1), rP.dcl
(2), dcl (3), td.dcl (4),
diSAbLE (5)
Ö
rP (1)
VT
COASt (0), rP (1),
no.rP (2)
SV
no.rP (2)
Final speed
demand
Area for coiler operation, speed
limited to ref and positve torque
Area for decelerating the coiler, reverse
speed limited and negative torque
-5rpm
Speed
Torque
-5rpm
Area for normal uncoiler
operation: negative torque,
limited to low speed in reverse
Speed reference
Area for accelerating
uncoiler: positive torque,
limited speed
Speed
Torque
Stopping
Mode
Phase 1
Phase 2
Comments
0: Coast
Inverter
disabled
Drive cannot
be re-enabled
for 1s
Delay in phase 2 allows
rotor flux to decay
1: Ramp
Ramp down
to zero
frequency
Wait for 1s with
inverter
enabled
2: Ramp
followed
by DC
injection
Ramp down
to zero
frequency
Inject DC at
level specified
by Pr
6.06
for
time defined by
Pr
6.07
3: DC
injection
with zero
speed
detection
Low
frequency
current
injection
with
detection of
low speed
before next
phase
Inject DC at
level specified
by Pr
6.06
for
time defined by
Pr
6.07
The drive automatically
senses low speed and
therefore it adjusts the
injection time to suit the
application. If the injection
current level is too small
the drive will not sense
low speed (normally a
minimum of 50-60% is
required).
4: Timed
DC
injection
braking
stop
Inject DC at
level
specified by
Pr
6.06
for
time
specified by
Pr
6.07
5: Disable
Inverter
disabled
Allows the drive to be
immediately disabled and
then re-enabled again
immediately if required.
Stopping Mode
Action
0: Coast
Inhibits the inverter
1: Ramp
Stop with ramp
2: No ramp
Stop with no ramp
6.06
Injection braking level
RW
Uni
RA
US
OL
Ú
0.0 to 150.0 %
Ö
100.0