70
ACS 160 User’s Manual
Group 20: Limits
Code Description
2003
MAX CURRENT
Maximum output current.
The maximum output current that the ACS 160 will supply to the motor.
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 by increasing output frequency.
Caution!
If a braking resistor is connected to the ACS 160, this parameter value must be set to 0 to enable
proper operation of the chopper. Do not set this parameter to 0 if braking resistor is not connected
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 output frequency, the
inertia of the load will cause regeneration back into the ACS 160, 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 a 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.
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