Mitsubishi Electric FR-F820-00046, Instruction Manual

Page: 369 / 940

Parameters (M) Monitor display and monitor output signal
FR-F800 5 - 197
Monitor display (setting) increments
●
When both Pr. 37 and Pr. 144 have been set, their priorities are as given below.
Pr. 144 = 102 to 112 > Pr. 37 = 1 to 9998 > Pr. 144 = 2 to 12
●
The combination of the Pr. 37 and Pr. 144 settings as shown below determines the setting
increment for each monitor. (The initial values are shown in grey shaded fields.)
Motor speed r/min conversion formula: Frequency ×120 / Number of motor poles (Pr. 144)
Machine speed conversion formula: Pr. 37 × Frequency / Pr. 505
For Pr. 144 in the above formula, the value is "Pr. 144 – 100" when "102 to 112" is set in Pr. 144; and
the value is "4" when Pr. 37 = 0 and Pr. 144 = 0.
Pr. 505 is always set as frequency (Hz).
Pr. 37
Setting
Pr. 144
Setting
Output frequency
monitor
Set frequency monitor
Running speed
monitor
Frequency setting
parameter setting
0
(initial
value)
0 0.01 Hz 0.01 Hz
1 r/min
0.01 Hz
2 to 12 0.01 Hz 0.01 Hz 1 r/min 0.01 Hz
102 to 112
1 r/min 1 r/min 1 r/min 1 r/min
1 to 9998
0 0.01 Hz 0.01 Hz
1 (machine speed )
0.01 Hz
2 to 12
1 (machine speed ) 1 (machine speed ) 1 (machine speed ) 1 (machine speed )
102 to 112 0.01 Hz 0.01 Hz
1 r/min
0.01 Hz
Tab. 5-86: Setting range of parameter 37 and 144
NOTES The inverter's output frequency is displayed as synchronous speed under V/F control. The dis-
played value is "actual motor speed" + "motor slip". When Advanced magnetic flux vector control,
or PM motor control is selected, the actual motor speed (estimated value by motor slip calcula-
tion) is used.
When Pr. 37 = "0" and Pr. 144 = "0", the running speed monitor is displayed with the number of
motor poles 4. (Displays 1800 r/min at 60 Hz)
To change the PU main monitor (PU main display), refer to Pr. 52.
When using the machine speed display for the parameter unit (FR-PU07), do not change the speed
with the up/down key if a set speed above 65535 is being displayed. The set speed may become
an undetermined value.
When the FR-A8ND option is connected, the frequency display (setting) will be used regardless of
the Pr. 37, Pr. 144 settings.
E
CAUTION:
Make sure to set the running speed and the number of motor poles.
Otherwise, the motor might run at extremely high speed, damaging the machine.
Parameters referred to
Pr. 1 Maximum frequency => page 5-176
Pr. 52 Operation panel main monitor selection => page 5-198
Pr. 81 Number of motor poles => page 5-41
Pr. 800 Control method selection => page 5-41