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HOIST OVER-WEIGHT FUNCTION
The VFD is setup to use the output current to the motor as the over-weight function. The VFD uses (2) over-weight current
parameters. Over---weight (2) is when operating
above low--weight (1) and over-
Having (2) over-weights greatly increases over-weight accuracy and decreases the likelihood of a false over-weight condition.
The VFD has an alternative over-weight current parameter source that can be configured. This is normally used in applications where
the hoist over-weight needs to be limited to a lower value in certain parts of a building or runway. The alternative over-weight uses (2)
over-weight current parameters in the same configuration as the standard over-weight function. To use the alternative over-weight,
configure the parameters in the chart below and modify the over-weight circuit to switch the source of the signal to the 24v DPDT
relay between digital output 11 and digital output 14.
The VFD has (3) configurations for the over-weight signal, external momentary, external maintained, Internal.
External momentary - will output a signal when the condition is met but will not maintain the output after the condition is no longer
met.
External maintained - will output a signal when the condition is met and maintain the signal until the reset condition is met or power is
cycled.
Internal - s to function. Internal works the same way as the external maintained but will internally
prevent the hoist up function until the reset condition is met or power is cycled.
NOTE
– Internal is only latched to the STANDARD OVER-WEIGHT function.
HOW IT WORKS – When the output current to the motor exceeds the value in the conditional over-weight current parameter for an
amount of time that exceeds the detection delay time, the conditional digital output will turn on and activate a 24v relay to interrupt
the hoist E-Stop circuit. The signal is turn off once the hoist has lowered for 2.0 seconds.
HOIST OVER-WEIGHT PARAMETERS
Over-Weight Signal Output Type
UE-54
0 = External Momentary
1 = External Maintained
2 = Internal
Over-Weight Detection Delay Time
UE-55 150 = (1.5 seconds)
UE-56 200 = (2.0 seconds)
Standard Over-Weight (1) Value *Low Speed
CE106 14.0 Amps
Standard Over-Weight (2) Value *High Speed
CE107 15.0 Amps
Digital Output 11 Function
CC-01 69:MO1
CC-11 00: N.O
Alternative Over-Weight (1) Value *Low Speed
CE102 10.0 Amps
Alternative Over-Weight (2) Value *High Speed
CE103 11.0 Amps
Digital Output 14 Function
CC-04 73:MO5
CC-14 00: N.O
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