76
Settings of speed deviation limit function upon acceleration/deceleration
Console
panel
monitor
display
Contents
Setting range (selecting item)
Setting
resolution
Initialized
data
Unit
d-30
Speed deviation limiting command
selection
oFF (Without limiting command)
on (With limiting command)
- OFF
-
d-31
Maximum deviation (positive)
0.0 to 100.0
0.1
5.0
%
d-32
Maximum deviation (negative)
-100.0 to 0.0
0.1
-5.0
%
Speed deviation limiting command selection (d-30) to maximum deviation (negative) (d-32):
When the speed deviation limiting command selection is set to use (d-30 = on), the outputs of the speed and
the acceleration/deceleration control are limited to the deviations of the maximum deviation (positive) (d-31)
and maximum deviation (negative) (d-32). This function prevents an abrupt acceleration due to a sudden
change in the load or power source voltage when the load is lightened suddenly or a similar situation arises in
a state where the speed is reduced due to the torque limit during a speed control operation, allowing to
restore the speed with the slope that is set with the acceleration/deceleration time. (Note that the
acceleration/deceleration are restricted if you set a too small deviation.)
Incidentally, the settings of the maximum deviation (positive) (d-31) and maximum deviation (negative) (d-32)
become the maximum speed (A-00) when they are set to 100%.
7.6. Area E (Current Control Gain, Output Voltage Limit Related Setting Area)
Regeneration stall prevention function settings
Console
panel
monitor
display
Contents
Setting range (selecting item)
Setting
resolution
Initialized
data
Unit
E-00
Regeneration stall prevention function
usage selection
oFF (Unused)
on (Used)
- oFF
-
E-01
Regeneration stall prevention voltage
(200 V class) 320 to 360
1
340
V
(400V class) 640 to 720
1
680
Regeneration stall prevention function usage selection (E-00), regeneration stall prevention voltage (E-01):
When the DC voltage rises beyond the regeneration stall prevention voltage, this function limits the torque
command toward regeneration (in the negative direction for forward rotation, and in the forward direction for
reverse rotation) to zero and stops deceleration when decelerating to prevent the protective detection by the
VF66B (DC motor drive) input overvoltage protection (oV_i) action.
During deceleration, these functions can temporarily stop the deceleration to prevent the inverter from tripping
due to an overvoltage (oV) protection operation.
Console
panel
monitor
display
Contents
Setting range (selecting item)
Setting
resolution
Initialized
data
Unit
E-02 [No
function]
*1
- -
-
-
*1: There is no function to be set.
