Megmeet MV600 Series User Manual

222
Compare the analog feedback quantity of the thermal sensor installed on the motor with the preset
protection threshold P97.06 of the sensor. If the feedback quantity is greater than the protection threshold
for more than 10s, the drive will report the motor over-temperature fault (Er.oHL). This value can be set
properly only when customers know the temperature change resistance value regularity of the motor
temperature detection.
P97.07 = 0 means the over-voltage stall action is disabled.
P97.07 = 1 means the over-voltage stall action is enabled.
During the deceleration operation of the drive, due to the load inertia, the actual dropping rate of the
motor rotating speed may be lower than the dropping rate of the output frequency. At this time the
motor will feed back the power supply to the drive, causing the DC bus voltage of the drive to increase. If
no protection measure is taken for this, the drive will trip because of over-voltage.
The over-voltage stall protection function can detect the bus voltage during the drive deceleration
operation and compare it with the stall over-voltage point defined by P97.08 (relative to the standard bus
voltage). If it exceeds the stall over-voltage point, the drive output frequency will stop falling. The
deceleration operation will not be resumed until the bus voltage is detected to be lower than the stall
over-voltage point again, as shown in Fig.6-84.
Fig. 6-84 Over-voltage stall function
The auto current limiting function refers to automatically limiting the load current to lower than the preset
auto current limiting level (P97.10) through real time monitoring on the load current, so as to prevent the
tripping caused by current overshoot. This function is especially useful for the loads with large inertia or
drastic change.
The auto current limiting level (P97.10) defines the current threshold for the auto current limiting action.
Its setting range is the percentage relative to the drive rated current.
Fre
q
uenc
y
reduction rate u
p
on current limitin
g
0.00~99.99Hz/s
(
10.00
)
P97.11
Auto current limitin
g
level 20.0~200.0%
(
150.0%
)
P97.10
Auto current limitin
g
action selection 0~1
(
1
)
P97.09
Ove
r
-volta
g
e
p
oint at stall 120.0~150.0%
(
140.0%
)
P97.08
Ove
r
-volta
g
e stall selection 0~1
(
1
)
P97.07

Megmeet MV600 Series Specifications

General

Brand	Megmeet
Model	MV600 Series
Category	DC Drives
Language	English