ABB ACS 140, Руководство по программированию, Страница: 48 / 70

40
Group 20: Limits
Code Description
2003 MAX CURRENT
Maximum output current.
The maximum output current that the ACS 140 will supply to the motor. The
default value is 1.5 * I
N
.
2005 OVERVOLT CTRL
DC overvoltage controller enable.
Fast braking of a high inertia load causes the DC bus voltage to rise to the
overvoltage control limit. To prevent the DC voltage from exceeding the limit, the
overvoltage controller automatically decreases the braking torque.
Caution! If a braking chopper and a braking resistor are connected to the
ACS 140, this parameter value must be set to 0 to ensure proper operation of
the chopper.
0 =
DISABLE
1 =
ENABLE
2006 UNDERVOLT CTRL
DC undervoltage controller enable.
If the DC bus voltage drops due to loss of input power, the undervoltage
controller will decrease the motor speed in order to keep the DC bus voltage
above the lower limit. By decreasing the motor speed, the inertia of the load will
cause regeneration back into the ACS 140, thus keeping the DC bus charged,
and preventing an undervoltage trip. This will increase power loss ride-through
on systems with a high inertia, such as a centrifuge or fan.
0 =
DISABLE
1 =
ENABLE
(
TIME
)
Enable with 500 ms time limit for operation.
2 =
ENABLE
Enable without time limit for operation.
2007 MINIMUM FREQ
Operating range minimum output frequency.
Note! Keep
MINIMUM FREQ
≤
MAXIMUM FREQ
.
2008 MAXIMUM FREQ
Operating range maximum output frequency.