Limits - ABB ACS800 Series Firmware Manual

78
No. Name/Value

20 LIMITS

20.01 MINIMUM SPEED
-18000 / (no. of pole pairs)
...MAXIMUM SPEED
20.02 MAXIMUM SPEED
MINIMUM SPEED...18000
/ (no. of pole pairs)
20.03 MAXIMUM CURRENT
0.0...x.xA
20.04 MAXIMUM TORQUE
0.0...600.0%
20.05 OVERVOLTAGE CTRL
OFF
ON
20.06 UNDERVOLTAGE CTRL
OFF
ON
20.07 FREQUENCY MIN
-300.00...FREQUENCY
MAX Hz
20.08 FREQUENCY MAX
Actual signals and parameters
Description
Drive operation limits.
Defines the allowed minimum speed.
WARNING! The limit is linked to the motor nominal speed
setting i.e. 99.08 MOTOR NOM SPEED. If
the default speed limit will also change.
Minimum speed limit
Defines the allowed minimum speed.
WARNING! The limit is linked to the motor nominal speed
setting i.e. 99.08 MOTOR NOM SPEED. If
the default speed limit will also change.
Maximum speed limit
Defines the allowed maximum motor current.
Current limit
Defines the maximum torque limit for the drive.
Value of limit in percent of motor nominal torque.
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 braking chopper and resistor are connected to the drive, the
controller must be off (selection NO) 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 will automatically decrease the motor speed in order to keep
the voltage above the lower limit. By decreasing the motor speed, the
inertia of the load will cause regeneration back into the drive, keeping
the DC link charged and preventing an undervoltage trip until the
motor coasts to stop. This will act 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.
Defines the minimum limit for the drive output frequency.
Note: Visible only after entering proper code in
Minimum frequency limit.
Note: If the value is positive, the motor cannot be run in the reverse
direction.
Defines the maximum limit for the drive output frequency.
Note: Visible only after entering proper code in
FbEq
99.08 is changed,
20000 =
11.05
REF MAX
99.08 is changed,
20000 =
11.05
REF MAX
10 = 1 A
100 = 1%
0
65535
0
65535
16.03 PASS CODE.
100 = 1 Hz
16.03 PASS CODE.
EXT1
EXT1