Load Float; Motor Brake Wait Delay - Hitachi P1 Basic Instruction Manual

LO A D FL O AT
Load float makes use of the encoder feedback to hold the load at zero speed without se�ng the motor brake. This allows for
extremely precise movement of a load as well as elimina�ng motor brake wear by always se�ng the motor brake at zero speed.
Once the motor brake has been released and direc�onal commands have been completely released the VFD will decelerate to zero
speed and float the load for the set amount �me in parameter UE-29. If a direc�onal command is given before the load float �mer
has expired the load float �mer will reset once the direc�onal commands are released again.
Once the �mer has expired the VFD will close the motor brake and start the End of Run Motor Brake Check. The load float �mer is
adjustable please use the example below to set the desired float �me.
Example: 2.00 seconds / UE-29 = 200
M OT OR B R A KE WA I T DE LA Y
In some cases a motor brake may react faster or slower when given the release or set command. To ensure the motor doesn't not
run through the brake or prematurely slip during the End of Run Brake check the Motor Brake Delay parameter UE-28 has been
introduced.
This delay will allow for the motor brake to fully release before accep�ng a frequency command as well as allowing the motor brake
to fully set before star�ng the End of Run Motor Brake Check. Please use the example below to adjust the motor brake delay �me.
Example: 0.3 seconds / UE-28 = 30
12/17/2018 Hitachi P1 Closed Loop Hoist Basic Instruc�on Manual Firmware V19 – V25
* Closed Loop Hoist Only *
12