Setting Hoist Over-Weight - Hitachi P1 Basic Instruction Manual

SETTING HOIST OVER-WEIGHT

Each hoist's over-weight settings will be set at the factory prior to shipment. In some cases, field adjustments may be required. Use
the step chart below to set the hoist's over-weight settings.
NOTE – If you are setting the alternative over-weight parameters use steps 6A and 7A
Step
Locate the terminal knife disconnect labeled "BPS" and pull the top of the yellow/orange tab outwards, this will
1
bypass the over-weight circuit.
2 Attach the 100% rated load to the hook block.
On the hoist VFD's display there will be an output current monitor. If the display does not show an output current
3
monitor go to parameter dA-02 to monitor the output current to the motor.
Proceed to lift the 100% rated load off the ground in low speed. Monitor the output current to the motor and write it
4
down. Be sure to wait for the output current to normalize
Proceed to lift the 100% rated load off the ground in high speed. Monitor the output current to the motor and write it
5
down. Be sure to wait for the output current to normalize.
6 Take the value from step 4 and multiply it by 1.05 and set STANDARD over-weight (1) parameter CE106 to that value.
Take the value from step 4 and multiply it by 1.05 and set ALTERNATIVE over-weight (1) parameter CE102 to that
6A
value.
7 Take the value from step 5 and multiply it by 1.05 and set STANDARD over-weight (2) parameter CE107 to that value.
Take the value from step 5 and multiply it by 1.05 and set ALTERNATIVE over-weight (2) parameter CE103 to that
7A
value.
8 Locate the terminal knife disconnect labeled "BPS" and close the tab.
Operate the hoist in low and high speed with the 100% rated load.
If the over-weight circuit trips in low speed, then increase the value of over-weight (1) parameter until it no longer
9 trips.
If the over-weight circuit trips in high speed, then increase the value of over-weight (2) parameter until it no longer
trips.
Instruction
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