Installation manual

Configuration Mode (ConF)
176 S1A28692 03/2010
BRAKE LOGIC CONTROL
Used to control an electromagnetic brake by the drive, for horizontal and vertical hoisting applications, and for
unbalanced machines.
Principle:
- Vertical hoisting movement:
Maintain motor torque in the driving load holding direction during brake opening and closing, in order to hold
the load, start smoothly when the brake is released and stop smoothly when the brake is engaged.
- Horizontal movement:
Synchronize brake release with the build-up of torque during startup and brake engage at zero speed on
stopping, to help to prevent jolting.
Recommended settings for brake logic control for a vertical hoisting application:
• [Brake impulse] (bIP): [Yes] (YES). Ensure that the direction of rotation FW corresponds to lifting the
load.
For applications in which the load being lowered is very different from the load being lifted, set bIP =
2 Ibr (for example, ascent always with a load and descent always without a load).
• Brake release current ([Brake release I FW] (Ibr) and [Brake release I Rev] (Ird) if [Brake impulse]
(bIP) = 2 Ibr): Adjust the brake release current to the rated current indicated on the motor.
During testing, adjust the brake release current in order to hold the load smoothly.
• Acceleration time: For hoisting applications, it is advisable to set the acceleration ramps to more than 0.5
seconds. Ensure that the drive does not exceed the current limit.
The same recommendation applies for deceleration.
Reminder: For a hoisting movement, a braking resistor should be used.
• [Brake Release time] (brt): Set according to the type of brake. It is the time required for the mechanical
brake to release.
• [Brake release frequency] (bIr), in open-loop mode only: Leave in [Auto] (AUtO), adjust if
necessary.
• [Brake engage frequency] (bEn): Leave in [Auto] (AUtO), adjust if necessary.
• [Brake engage time] (bEt): Set according to the type of brake. It is the time required for the mechanical
brake to engage.
Recommended settings for brake logic control for a horizontal hoisting application:
• [Brake impulse] (bIP): No
• Brake release current (Ibr): Set to 0.
• [Brake Release time] (brt): Set according to the type of brake. It is the time required for the mechanical
brake to release.
• [Brake engage frequency] (bEn), in open-loop mode only: Leave in [Auto] (AUtO), adjust if
necessary.
• [Brake engage time] (bEt): Set according to the type of brake. It is the time required for the mechanical
brake to engage.
WARNING
LOSS OF CONTROL
• Check that the selected settings and configurations will not result in the dropping or loss of control of the
load being lifted.
• Follow the recommandations below.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: [phone]-Outside Local Area: [phone]-www.stevenengineering.com