18 Freq Input; 20 Limits - ABB ACS150 series User Manual

98
Parameters in the Long parameter mode
Index Name/Selection

18 FREQ INPUT

1801 FREQ INPUT MIN
0...16000 Hz
1802 FREQ INPUT MAX
0...16000 Hz
1803 FILTER FREQ IN
0.0...10.0 s

20 LIMITS

2003 MAX CURRENT
0.0...1.8 · I A
2N
2005 OVERVOLT CTRL
0 = DISABLE
1 = ENABLE
2006 UNDERVOLT CTRL
0 = DISABLE
1 = ENABLE(TIME)
2 = ENABLE
2007 MINIMUM FREQ
-500.0...500.0 Hz
Actual signals and parameters
Description
Frequency input signal processing. Digital input DI5 can be programmed as
a frequency input. Frequency input can be used as external reference signal
source. See parameter 1103/1106
Defines the minimum input value when DI5 is used as a frequency input.
Minimum frequency
Defines the maximum input value when DI5 is used as a frequency input.
Maximum frequency
Defines the filter time constant for frequency input, that is the time within
which 63% of a step change is reached.
Filter time constant
Drive operation limits
Defines the allowed maximum motor current.
Current
Activates or deactivates the overvoltage control of the intermediate DC link.
Fast braking of a high inertia load causes the 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.
Note: If a brake chopper and resistor are connected to the drive, the
controller must be off (selection DISABLE) to allow chopper operation.
Overvoltage control deactivated
Overvoltage control activated
Activates or deactivates the undervoltage control of the intermediate DC link.
If the DC voltage drops due to input power cut off, the undervoltage controller
automatically decreases the motor speed in order to keep the voltage above
the lower limit. By decreasing the motor speed, the inertia of the load causes
regeneration back into the drive, keeping the DC link charged and preventing
an undervoltage trip until the motor coasts to stop. This acts as a power-loss
ride-through functionality in systems with a high inertia, such as a centrifuge
or a fan.
Undervoltage control deactivated
Undervoltage control activated. The undervoltage control is active for
500 ms.
Undervoltage control activated. No operation time limit.
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.
Note: MINIMUM FREQ value must not exceed MAXIMUM FREQ value.
f
2007 value is < 0
2008
Allowed frequency range
0
2007
Minimum frequency
REF1/2 SELECT.
f
2007 value is > 0
2008
Allowed frequency range
2007
0
t
-(2007)
Allowed frequency range
-(2008)
Def
0 Hz
1000 Hz
0.1 s
1.8 · I A
2N
1 = ENABLE
1 = ENABLE
(TIME)
0.0 Hz
t