84 Start-up and control
Electrical braking and voltage control
Electrical braking (a built-in brake chopper and brake resistor) is needed in elevator
applications to allow the drive to dissipate regenerative energy. The chopper connects the
brake resistor to the intermediate circuit of the drive whenever the DC voltage exceeds the
maximum limit.
If the DC voltage drops due to input power cut off, the undervoltage controller will automatically
decrease the motor torque to keep the voltage above the lower limit.
• Set the brake chopper and resistor settings
(typically set parameters 48.03 BR POWER MAX
CNT and 48.04 R BR.
• Check that the connection is functioning.
For more information on the brake resistor
connection, see chapter Resistor braking on
page 343.
48.01…48.05
Start/stop control
As a factory default, parameter 10.01 is set to IN1 F
IN2R.
• Start up: DI1 active (= 1)
• Start down: DI2 active (= 1)
Note: The drive will not start if both DI1 and DI2 are
active (= 1).
10.01 START FUNC
10.02 UP COMMAND
10.03 DOWN COMMAND
Mechanical brake control
Select the brake control function: brake control with
monitoring or without monitoring.
35.01 BRAKE CONTROL
If you selected brake control with monitoring, activate
the monitoring for 1-2 brake contactors through
digital inputs.
35.02 BRAKE MONITOR 1
35.03 BRAKE MONITOR 2
Based on the mechanical brake opening delay,
define the brake open delay.
35.04 BRAKE OPEN DELAY
Define the brake modulation delay. 35.05 MODULATION DELAY
Define the brake close speed. 35.06 BRAKE CLOSE SPEED
Speed reference scaling
Define the gear ratio. 80.02 GEAR RATIO
Define the sheave diameter in millimeters. 80.03 SHEAVE DIAMETER
Define the roping ratio. 80.04 ROPING RATIO
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