Danfoss VLT Midi Drive FC-280P4K0 [41/136] Notice

Danfoss VLT Midi Drive FC-280P3K0 [41/136] Notice
1-83 Precise Stop Function
Option: Function:
[1] Counter stop
with reset
Counts the number of pulses, typically from
an encoder, and generates a stop signal
after a preprogrammed number of pulses
dened in parameter 1-84 Precise Stop
Counter Value, which has been received at
terminal 29 or terminal 33. This is a direct
feedback with one-way closed loop control.
The counter function is activated (starts
timing) at the edge of the start signal
(when it changes from stop to start). After
each precise stop, the number of pulses
counted during ramp down to 0 RPM is
reset.
[2] Counter stop
without reset
Same as [1], but the number of pulses
counted during ramp down to 0 RPM is
deducted from the counter value entered in
parameter 1-84 Precise Stop Counter Value.
This reset function can be used to
compensate for the extra distance done
during ramping down, and to reduce the
impacts of gradual wear of mechanical
parts.
[3] Speed
compensated
stop
Stops at precisely the same point, regardless
of the present speed. The stop signal is
delayed internally when the present speed
is lower than the maximum speed (set in
parameter 4-19 Max Output Frequency). The
delay is calculated on the basis of the
reference speed of the frequency converter
and not based on the actual speed. Make
sure that the frequency converter has
ramped up before activating the speed
compensated stop.
[4] Speed
compensated
counter stop
with reset
Same as [3], but after each precise stop, the
number of pulses counted during ramp
down to 0 RPM is reset.
[5] Speed
compensated
counter stop
without reset
Same as [3], but the number of pulses
counted during ramp down to 0 RPM is
deducted from the counter value entered in
parameter 1-84 Precise Stop Counter Value.
This reset function can be used to
compensate for the extra distance done
during ramping down and to reduce the
impacts of gradual wear of mechanical
parts.
1-84 Precise Stop Counter Value
Range: Function:
100000* [0 -
999999999]
Enter the counter value to be used in
the integrated precise stop function in
parameter 1-83 Precise Stop Function.
1-84 Precise Stop Counter Value
Range: Function:
The maximum permissible frequency
at terminal 29 or 33 is 32 kHz.
1-85 Precise Stop Speed Compensation Delay
Range: Function:
10 ms* [0 - 100
ms]
Enter the delay time for sensors, PLCs, and so
on for use in parameter 1-83 Precise Stop
Function. In speed-compensated stop mode,
the delay time at dierent frequencies has a
major inuence on the stop function.
1-88 AC Brake Gain
Range: Function:
1.4* [1.0 -
2.0]
This parameter is used to set AC brake power
capability (set ramp-down time when inertia is
constant). In the condition that the DC-link voltage
is not higher than DC-link voltage trip value, the
generator torque can be adjusted with this
parameter. The higher AC brake gain is, the
stronger the brake capability is. It equals to 1.0
means that there is no AC brake capability.
NOTICE
If there is continuous generator torque,
higher generator torque causes higher
motor current, and the motor becomes hot.
In this condition, the parameter 2-16 AC
Brake, Max current can be used to protect
the motor from overheating.
1-90 Motor Thermal Protection
Option: Function:
[0] * No protection Continuously overloaded motor, when no
warning or trip of the frequency converter
is required.
[1] Thermistor
warning
Activates a warning when the connected
thermistor in the motor reacts on a motor
overtemperature.
[2] Thermistor
trip
Stops (trips) the frequency converter when
the connected thermistor in the motor
reacts on a motor overtemperature.
The thermistor cut out value must be >3
kΩ.
Integrate a thermistor (PTC sensor) in the
motor for winding protection.
[3] ETR warning 1 Calculates the load and activates a warning
in the display when the motor is
overloaded. Program a warning signal via 1
of the digital outputs.
[4] ETR trip 1 Calculates the load and stops (trips) the
frequency converter when the motor is
Parameter Descriptions Programming Guide
MG07C202 Danfoss A/S © 03/2016 All rights reserved. 39
4 4

Содержание

Похожие устройства

Скачать