5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
Hoist function auxiliary settings
0000H to 00FFH (hexadecimal format)
Bit 0: Medium load speed multiplying factor
selection
0: Fixed multiplying factor, 1: Proportional to
load
Operation details
If operation is started, the set frequency is reached, and light load automatic double speed judgment permission
“LAC-ENB” is ON after load judgment delay time d180 and d181 have elapsed, load judgment is performed, and
the mode changes to double speed mode. Loads are classified into light load, medium load, and heavy load with
light load detection level d182 and d183, and heavy load detection level d184 and d185 for load judgment, and
double speed operation can be performed for light loads and medium loads.
Light load automatic double speed judgment permission “LAC-ENB” assignment (Function code data
= 105)
This is a permission command used to perform load judgment for automatic double speed operation for light loads.
Load judgment is performed while the motor is running at constant speed, and therefore this signal should be turned
ON before and after reaching the set frequency. If this signal is not assigned, load judgment is not performed even
if the setting conditions are established for a light load. If this signal is ON while the motor is running at constant
speed, and light load judgment delay time d180 and d181 have elapsed, load judgment is performed. If the detected
load is smaller than heavy load detection level d184 and d185 when performing load judgment, the mode changes
to double speed mode.
Double speed mode is ended when “LAC-ENB” turns OFF, or the set frequency is changed, and the motor
decelerates to the set frequency in the deceleration time.
Load type and speed multiplying factor
Speed multiplying factor *1
d175, d177,
automatically
calculated based on
load*2
d176, d178,
automatically
calculated based on
load*2
Load type speed multiplying factor (if heavy load detection level = 999 (disable))
Speed multiplying factor *1
Performing light load automatic double speed operation “LAC” assignment (Function code data = 159)
By assigning this signal to a digital output, the inverter is able to monitor that the motor is performing double speed
operation. This signal turns ON when in double speed mode, and turns OFF when double speed mode ends.
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