19-08 Power-Recovery
Option:
Function:
outside the HW or SW limit area, the error is
automatically cleared and the
error occurred
signal
goes low to indicate that normal operation is
restored.
19-09 Automatic Brake Control
Option:
Function:
[0]
Disabled When the automatic brake control function is
disabled (set to [0]), the frequency converter
control loop is active, even at standstill.
[1]
*
Enabled When the automatic brake control function is
enabled (set to [1]), the electromechanical brake
is automatically activated every time the
application has been at standstill for a time
period specified in parameter
19-12 Hold Delay
.
This is especially useful in hoist applications
where the motor could overheat if it has to
deliver full torque at standstill for a prolonged
period.
19-10 Coast Delay
Range:
Function:
200
ms
[0–
1000
ms]
Used with the automatic brake control function.
The coast delay is the delay after activating the
electro-mechanical brake before disabling the
controller and coasting the motor. Useful in
hoisting applications where the load would
otherwise drop a little after each stop. This is
because the activation of the brake is slower
than the deactivation of the motor.
19-11 Brake Delay
Range:
Function:
200
ms
[0–
1000
ms]
Used with the automatic brake control function.
The brake delay is the delay after activating the
control and magnetising the motor, before the
brake is deactivated. Useful in applications with
(typically large) motors that take a longer time
to be fully magnetised than the time it takes for
the electro-mechanical brake to deactivate.
19-12 Hold Delay
Range:
Function:
0 s [0–
10000 s]
Used with the automatic brake control function.
The hold delay is a waiting period in which the
brake is not activated, even though the
application is at standstill. Useful in applications
where a sequence of fast positioning commands
is followed by longer standstill periods.
19-13 Brake Wear Limit
Range:
Function:
0 [0–
1073741824
UU]
If a value higher than [0] (disabled) is set,
the motor defines an error situation (
Brake
wear limit exceeded
– ERROR STATUS = 7) if
the drive moves more than the number of
user units (UU) specified in this parameter
while the electronic brake is activated.
19-14 Motor/Encoder Gear Numerator
Range:
Function:
1 [1–
100000]
If the encoder is mounted on a gear where 5
revolutions of the motor correspond to 2
revolutions of the encoder, this parameter should
be set to [5] (the number of motor revolutions)
and parameter
19-15 Motor/Encoder Gear
Denominator
should be set to [2] (the number of
encoder revolutions). If the encoder is mounted
directly on the motor shaft, this parameter setting
should remain at [1].
19-15 Motor/Encoder Gear Denominator
Range:
Function:
1 [1–100000] See the description of parameter
19-14 Motor/
Encoder Gear Numerator
. If the encoder is
mounted directly on the motor shaft, this
parameter setting should remain at [1].
19-16 Maximum Jog Velocity
Range:
Function:
100 ERPM [1–20000
ERPM]
The maximum speed allowed while
jogging the application is specified in
terms of Encoder Revolutions Per
Minute (ERPM).
NOTICE
This setting must never exceed a value that is approxi-
mately 5% lower than the value in parameter
32-80
Maximum Velocity (Encoder)
.
19-17 Jog Ramp Time
Range:
Function:
5000
ms
[10–
100000
ms]
This parameter specifies the ramp-up time
and the ramp-down time used during
jogging. The ramp time is defined as the
time in milliseconds it would take to ramp
from standstill to the maximum allowed
velocity in parameter
32-80 Maximum
Velocity (Encoder)
.
19-18 Jog Velocity Scaling
Option:
Function:
[0]
*
No scaling The jog velocity is defined in encoder
revolutions per minute (ERPM).
[1]
Scaling
The jog velocity is scaled by Motor/Encoder
Gear Numerator/Gear Denominator.
Commissioning
Operating Instructions
MG33R302
Danfoss A/S © 04/2014 All rights reserved.
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