5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
(Note 1) The operating frequency multiplied by the double speed rate is always limited to the “maximum frequency
at which the output torque can rise” ((1) in figure).
(Note 2) The double speed rate in the medium load area is the multiplying factor obtained through linear
interpolation from the medium load double speed rate to the light load double speed rate. ((3) in figure)
If 999 is set for the double speed rate (d175 or d176) only, the multiplying factor obtained through linear
interpolation to the double speed rate determined by “maximum frequency at which the output torque
can rise ÷ safety factor” equivalent to the light load detection level (d182, d183) is used. ((4) in figure)
(Note 3) If set with the light load detection level (d182, d183) ≥ heavy load detection level (d184, d185), the setting
will be disabled (equivalent to double speed rate of 100%) in the same way as when the medium load
area is set to 999.
(Note 4) By setting the double speed rate to 999 for both light and medium loads, the setting will be automatically
calculated so that the motor is run at the “maximum frequency at which the output torque can rise ÷
safety factor” ((2) automatic operating frequency in figure) in all areas from the output torque based on
the motor rated torque and the safety factor (d179). The lower limit for the automatic operating frequency
is the base frequency.
d175,d177999
1
Fbase
[%]
Fbase
[%]
Fset
Fbase
Fmax
d175 ()
d177 ()
100
[%]
[Hz]
Fbase Fmax
Fset
0
(1) Max. frequency at which output torque can rise
(2) Automatic operating frequency
Fmax: Maximum output frequency
d175: Light load speed multiplying factor (Hoisting)
d177: Medium load speed multiplying factor (Hoisting)
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