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92
ACS510 User’s Manual
Start-Up
Group 20: Limits
This group defines minimum and maximum limits to follow in driving the motor –
frequency, current, etc.
Code Description
2003
MAX CURRENT
Defines the maximum output current (A) supplied by the drive to the motor.
2005
OVERVOLT CTRL
Sets the DC overvoltage controller on or off.
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 trip limit, the overvoltage controller automatically decreases the braking torque by
increasing output frequency.
0 =
DISABLE
– Disables controller.
1 =
ENABLE
– Enables controller
Warning!
If a braking chopper or a braking resistor is connected to the drive, this parameter value must be set to 0
to ensure proper operation of the chopper.
2006
UNDERVOLT CTRL
Sets the DC undervoltage controller on or off. When on:
• If the DC bus voltage drops due to loss of input power, the undervoltage controller decreases the motor speed in
order to keep the DC bus voltage above the lower limit.
• When the motor speed decreases, the inertia of the load causes regeneration back into the drive, keeping the DC
bus charged, and preventing an undervoltage trip.
• The DC undervoltage controller increases power loss ride-through on systems with a high inertia, such as a
centrifuge or a fan.
0 =
DISABLE
– Disables controller.
1 =
ENABLE
(
TIME
) – Enables controller with 500 ms time limit for operation.
2 =
ENABLE
– Enables controller without maximum time limit for operation.
2007
MINIMUM FREQ
Defines the minimum limit for the drive output frequency.
• A positive or zero minimum frequency value defines two
ranges, one positive and one negative.
• A negative minimum frequency
value defines one speed range.
See figure.
Note!
Keep
MINIMUM
FREQ
≤
MAXIMUM
FREQ
.
2008
MAXIMUM FREQ
Defines the maximum limit for the drive output frequency.
P 2007
P 2008
Freq
-(P 2007)
-(P 2008)
P 2008
P 2007
Frequency range allowed
Frequency range allowed
Frequency range allowed
Time
Freq
Time
2007 value is > 0
0
0
2007 value is< 0
Supplied from China by: Guangzhou Tofee Electro Mechanical Equipment Co., Ltd
Email: [email protected]