SJ700
2
Inverter
Configur
ing Dr
iv
e
P
a
ra
met
e
rs
3–49
Overvoltage
Functions
B130/B131: Over-voltage LADSTOP Enable / Over-voltage LADSTOP Level –
The over-
voltage LADSTOP function monitors the DC bus voltage and actively changes the output
frequency profile to maintain the DC bus voltage within settable limits. Although “LAD” refers
to “linear acceleration / deceleration,” the inverter only “STOPs” the deceleration slope so that
regenerative voltage will not cause the DC bus to rise enough to cause an over-voltage trip
event. Note that acceleration is not affected.
The graph below shows an inverter output profile that starts decelerating to a stop. At two
different points during the deceleration, regenerative voltage elevates the DC bus level, exceed-
ing the LADSTOP threshold set by B131. When the Over-voltage LADSTOP feature is
enabled by B130 = 01, the inverter stops the deceleration ramp in each case until the DC bus
level is again less than the threshold value.
Inverter stops deceleration
t
B130=01
OVLADSTOP = enable
t
Start deceleration
Deceleration resumed
Output
frequency
Over-voltage protection
trip threshold
Over-voltage protection
trip threshold
DC bus level
Func.
Code
Name/
Description
Keypad
Range and Settings
Defaults
Run
Mode
Edit
Lo Hi
SRW
OPE
FEF2
FE2
(EU)
FUF2
FU2
(USA)
FF2
F2
(Jpn)
B130
Over-voltage LADSTOP enable
OFF
00
Disable
00
00
00
✘ ✘
Pauses deceleration ramp when
DC bus voltage rises above
threshold level, in order to avoid
over-voltage trip
ON
0 1
Enable during deceleration and constant
speed
✘ ✘
AON
02
Enable during acceleration
✘ ✘
B131
Over-voltage LADSTOP level
330 to 390 (V) for 200V class,
660 to 780 (V) for 400V class
380/
760
380/
760
380/
760
✘ ✔
Sets the threshold level for over-voltage LADSTOP. When the DC bus voltage is above the
threshold value, the inverter stops deceleration until the DC bus voltage is less than the
threshold setting again.
✘ ✔
B132
Acceleration and deceleration rate at overvoltage
suppression
0.10 to 30.00 (seconds)
1.00
1.00
1.00
✘ ✔
B133
Overvoltage suppression proportional gain
0.00 to 2.55
0.50
0.50
0.50
✘ ✘
B134
Overvoltage suppression integral time
0.000 to 9.999, 10.00 to 63.53 (seconds)
0.060
0.060
0.060
✘ ✘