ABB ACS 800 Series, Firmware Manual

Page: 175 / 340

Actual signals and parameters
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20.03 MAXIMUM CURRENT Defines the allowed maximum motor current.
0.0 … x.x A
Current limit 0 …10·x.x
20.04 TORQ MAX LIM1 Defines the maximum torque limit 1 for the drive.
0.0 … 600.0% Value of limit in percent of motor nominal torque. 0 … 60000
20.05 OVERVOLTAGE
CTRL 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.
OFF Overvoltage control deactivated. 0
ON Overvoltage control activated. 65535
20.06 UNDERVOLTAGE
CTRL 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.
OFF Undervoltage control deactivated. 0
ON Undervoltage control activated. 65535
20.07 MINIMUM FREQ Defines the minimum limit for the drive output frequency. The limit can be set
only if parameter
99.04 = SCALAR.
-300.00 … 50 Hz Minimum frequency limit.
Note: If the value is positive, the motor cannot be run in the reverse direction.
-30000 …
5000
20.08 MAXIMUM FREQ Defines the maximum limit for the drive output frequency. The limit can be set
only if parameter
99.04 = SCALAR.
-50 … 300.00 Hz Maximum frequency limit -5000 …
30000
20.11 P MOTORING LIM Defines the allowed maximum power fed by the inverter to the motor.
0 … 600% Power limit in percent of the motor nominal power. 0 … 60000
20.12 P GENERATING LIM Defines the allowed maximum power fed by the motor to the inverter.
-600 … 0% Power limit in percent of the motor nominal power. -60000 … 0
20.13 MIN TORQ SEL Selects the minimum torque limit for the drive. The update interval is 100 ms.
MIN LIM1 Value of parameter 20.15 . 1
AI1 Analogue input AI1. See parameter 20.20 on how the signal is converted to a
torque limit.
2
AI2 See selection AI1. 3
AI5 See selection AI1. 4
PARAM 20.18 Limit given with 20.18 5
NEG MAX TORQ Inverted maximum torque limit defined with parameter 20.14 . 6
20.14 MAX TORQ SEL Defines the maximum torque limit for the drive. The update interval is 100 ms.
MAX LIM1 Value of parameter 20.04 . 1
AI1 Analogue input AI1. See parameter 20.20 on how the signal is converted to a
torque limit.
2
Index Name/Selection Description FbEq