ABB ACSM1 - Page 128

Parameters and firmware blocks
128
20.03 POS SPEED ENA FW block: LIMITS (see above).
Selects the source of the positive speed reference enable command.
1 = Positive speed reference is enabled.
0 = Positive speed reference is interpreted as zero speed reference (In the figure below 3.03
SPEEDREF RAMP IN is set to zero after the positive speed enable signal has cleared). Actions in
different control modes:
Speed control: Speed reference is set to zero and the motor is stopped along the currently active
deceleration ramp.
Torque control: Torque limit is set to zero and the rush controller stops the motor.
Position and synchron control: Dynamic limiter sets the positioning speed reference to zero and the
motor is stopped according to 70.06 POS DECEL LIM.
Homing and profile velocity mode control: Dynamic limiter sets the speed reference to zero and the
motor is stopped according to 70.06 POS DECEL LIM.
Example: The motor is rotating in the forward direction. To stop the motor, the positive speed enable
signal is deactivated by a hardware limit switch (e.g. via digital input). If the positive speed enable
signal remains deactivated and the negative speed enable signal is active, only reverse rotation of the
motor is allowed.
Bit pointer: Group, index and bit
20.04 NEG SPEED ENA FW block: LIMITS (see above).
Selects the source of the negative speed reference enable command. See parameter 20.03 POS
SPEED ENA.
Bit pointer: Group, index and bit
20.05 MAXIMUM CURRENT FW block: LIMITS (see above).
Defines the allowed maximum motor current.
0…30000 A Maximum allowed motor current.
20.06 MAXIMUM TORQUE FW block: LIMITS (see above).
Defines the maximum torque limit for the drive (in percent of the motor nominal torque).
0…1600% Maximum torque limit.
20.07 MINIMUM TORQUE FW block: LIMITS (see above).
Defines the minimum torque limit for the drive (in percent of the motor nominal torque).
-1600…0% Minimum torque limit.
20.03 POS SPEED ENA
20.04 NEG SPEED ENA
3.03 SPEEDREF RAMP IN
1.08 ENCODER 1 SPEED