Mitsubishi FR - S500 Instruction Manual page 69

Parameter Name
Base frequency
3
Base frequency
19
voltage
Second V/F (base
47
frequency)
*1 0 to 800V, 888, - - - for FR-S540-0.4K to 3.7K.
*2 1.9 times greater than the power supply voltage for the FR-S510W-0.1K to 0.75K.
*3 Twice greater than the power supply voltage for the FR-S510W-0.1K to 0.75K.
<Setting>
In Pr. 3 and Pr. 47, set the base frequency (motor's rated frequency).
Use the RT signal to switch between these two different base frequencies.
(Turn on the RT signal to make Pr. 47 valid.) (*)
When running the standard motor, generally set the "base frequency" to the rated
frequency of the motor. When running the motor using commercial power supply-
inverter switch-over operation, set the base frequency to the same value as the
power supply frequency.
When the frequency given on the motor's rating plate is only "50Hz", always set the
"base frequency" to "50Hz". Leaving the base frequency unchanged from "60Hz"
may make the voltage too low and the torque insufficient, resulting in an overload
trip. Special care must be taken when "1" is set in Pr. 14 "load pattern selection".
Set the base voltage (e.g. rated voltage of motor) in Pr. 19.
CAUTION
1. Set 60Hz in Pr. 3 "base frequency" when using a Mitsubishi constant-torque motor.
2. When automatic torque boost is selected, Pr. 47 is invalid. When automatic
torque boost is selected, setting "- - -" or "888" in Pr. 19 uses the rated output
voltage.
REMARKS
* The RT signal serves as the second function selection signal and makes the
other second functions valid.
Related parameters
When rated motor frequency is "50Hz"
RT signal (second function "Pr. 47") setting
Motor setting Pr. 71 "applied motor" (refer to page 93)
Automatic torque boost selection
Factory
Setting
Setting
Range
<EC version>
60Hz
0 to 120Hz
<50Hz>
- - - 0 to 500V,
<888> 888, - - -*1
0 to
- - -
120Hz, - - -
Pr. 14 "load pattern selection" (refer to page 66)
Pr. 60 to Pr. 63 (input terminal function
selection) (refer to page 88)
Pr. 98 "automatic torque boost selection (motor capacity)"
(refer to page 109)
60
Remarks
888: 95% of power supply voltage*2
- - -: Same as power supply
voltage*3
Setting is enabled when Pr. 30 = "1".
- - -: Function invalid
Setting is enabled when Pr. 30 = "1".