Mitsubishi Electronics FR-A500 ユーザーズマニュアル
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4
4.2.17 Speed display (Pr. 37, Pr. 144)
Pr. 37 "speed display"
Pr. 144 "speed setting switch-over"
The units of the running speed monitor display of the PU (FR-DU04/FR-PU04), the running speed setting in
the PU operation mode, and the parameter setting unit used for frequency setting can be changed from the
frequency to the motor speed or machine speed.
<Setting>
•
To display the machine speed, set in Pr. 37 the machine speed for 60Hz operation.
•
To display the motor speed, set the number of motor poles (2, 4, 6, 8, 10) or the number of motor poles
plus 100 (102, 104, 106, 108, 110) in Pr. 144.
plus 100 (102, 104, 106, 108, 110) in Pr. 144.
•
When values have been set in both Pr. 37 and Pr. 144, priority is as follows:
Pr. 144 = 102 to 110 > Pr. 37 = 1 to 9998 > Pr. 144 = 2 to 10
Hence, the shaded settings in the following list become valid.
Pr. 144 = 102 to 110 > Pr. 37 = 1 to 9998 > Pr. 144 = 2 to 10
Hence, the shaded settings in the following list become valid.
•
When the running speed monitoring has been selected, the parameter setting unit and the running speed
setting unit in the PU operation mode depend on the combination of the Pr. 37 and Pr. 144 settings as
indicated below:
setting unit in the PU operation mode depend on the combination of the Pr. 37 and Pr. 144 settings as
indicated below:
Parameter
Number
Factory
Setting
Setting Range
Remarks
37
0
0, 1 to 9998
0: Frequency setting added
144
4
0, 2, 4, 6, 8, 10, 102,
104, 106, 108, 110
Running Speed
Monitor Display
Parameter Setting Unit
Running Speed Setting Unit
Pr. 37 Setting
Pr. 144 Setting
Speed of 4-pole motor (r/min)
Hz
0
0
Motor speed (r/min)
0
2 to 10
1 to 9998
102 to 110
r/min
0
102 to 110
Machine speed
Hz
1 to 9998
0
r/min
1 to 9998
2 to 10
Note: 1. In the V/F control mode, the motor speed is converted from the output frequency and does not
match the actual speed. When the advanced magnetic flux vector control mode has been
selected in Pr. 80 and 81, this display shows the calculated speed (estimated value found by
motor slippage calculation).
2. During encoder feedback control, the data displayed is the same as in advanced magnetic flux
vector control. Note that the speed displayed is the actual speed from the encoder.
3. When the running speed display has been selected with "0" set in Pr. 37 and "0" in Pr. 144, the
monitor display shows the number of motor poles for a 4-pole motor (1800r/min is displayed at
60Hz).
4. To change the PU main monitor (PU main display) or PU level meter (PU level display), refer to
Pr. 52 and Pr. 53.
5. As the operation panel display is 4 digits, "----" is displayed when the monitored value exceeds
"9999".
CAUTION
Make sure that the running speed and number of motor poles set are correct.
Otherwise, the motor might run at extremely high speed, damaging the machine.
Related parameters
Pr. 52 "DU/PU main display data selection"
Pr. 53 "PU level display data selection"
Pr. 80 "motor capacity"
Pr. 81 "number of motor poles"
Pr. 53 "PU level display data selection"
Pr. 80 "motor capacity"
Pr. 81 "number of motor poles"