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LOAD FLOAT (CLV)
Load float is term used in closed loop vector control where the VFD can hold a load at 0hz / 0 speed without the use of the motor
brake. This function is available when operating in closed loop mode (AA121 = 10) and will greatly increase the life of the motor brake
by only using it as a holding/parking brake and not a dynamic brake in normal operation. Load float also gives the operator time to
make rapid precise movements.
HOW IT WORKS – When the hoist is commanded to stop in a normal operation the hoist will decelerate to 0hz and start the load float
timer. The load float timer will reset if a directional command is given before the load float timer expires. Once the load float timer
expires the motor brake will set and all directional commands will be ignored, and the brake slip test will begin.
UE-29 250 (2.5 seconds)
Note – The load float time can be increased but if extending the load float time to a large amount of time an external motor cooling
device may be
MOTOR TORQUE PROVING (CLV)
o before
releasing the motor brake. This is safety check feature is only available when operating in closed loop vector control only (AA121 =
10).
HOW IT WORKS – / 0 speed at the
Upon
powering up, fault reset, and or E-lated based off the last
suspended load at
r the motor brake delay time has
ode.
IMPORTANT! – Disabling this feature is not recommended unless troubleshooting without a load. Disabling this safety check feature
with a load suspended may result in dropping of the load.
TROUBLESHOOTING E51 – If an E51 fault occurs check the motor brake air gap. If the motor is turning during the test the VFD will try
and compensate by lowing th
make sure the motor connections are secure and making good connection.
UE-30
0 = Disabled
1 = Enabled
UE-32 400 (4.0 seconds)
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