ABB ACS800 Firmware Manual page 175

Index Name/Selection
20.03 MAXIMUM CURRENT Defines the allowed maximum motor current.
0.0 ... x.x A
20.04 TORQ MAX LIM1
0.0 ... 600.0%
20.05 OVERVOLTAGE
CTRL
OFF
ON
20.06 UNDERVOLTAGE
CTRL
OFF
ON
20.07 MINIMUM FREQ
-300.00 ... 50 Hz
20.08 MAXIMUM FREQ
-50 ... 300.00 Hz
20.11 P MOTORING LIM
0 ... 600%
20.12 P GENERATING LIM
-600 ... 0%
20.13 MIN TORQ SEL
MIN LIM1
AI1
AI2
AI5
PARAM 20.18
NEG MAX TORQ
20.14 MAX TORQ SEL
MAX LIM1
AI1
Description
Current limit
Defines the maximum torque limit 1 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 brake 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. The limit can be set
only if parameter 99.04 = SCALAR.
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. The limit can be set
only if parameter 99.04 = SCALAR.
Maximum frequency limit
Defines the allowed maximum power fed by the inverter to the motor.
Power limit in percent of the motor nominal power.
Defines the allowed maximum power fed by the motor to the inverter.
Power limit in percent of the motor nominal power.
Selects the minimum torque limit for the drive. The update interval is 100 ms.
Value of parameter 20.15.
Analogue input AI1. See parameter
torque limit.
See selection AI1.
See selection AI1.
Limit given with 20.18
Inverted maximum torque limit defined with parameter
Defines the maximum torque limit for the drive. The update interval is 100 ms.
Value of parameter 20.04.
Analogue input AI1. See parameter
torque limit.
20.20 on how the signal is converted to a
20.14.
20.20 on how the signal is converted to a
Actual signals and parameters
175
FbEq
0 ...10·x.x
0 ... 60000
0
65535
0
65535
-30000 ...
5000
-5000 ...
30000
0 ... 60000
-60000 ... 0
1
2
3
4
5
6
1
2