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Monitor Display And Monitor Output Signal; Speed Display And Speed Setting (pr. 37, Pr. 144) - Mitsubishi Electric F700 Instruction Manual

Fr-f720-0.75k to 110k; fr-f740-0.75k to 560k.
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4.11 Monitor display and monitor output signal

Purpose
Display motor speed
Set speed
Change PU monitor display data
Change of the monitor output from
terminal FM and AM
Set the reference of the monitor
output from terminal FM and AM
Adjust terminal FM, AM outputs

4.11.1 Speed display and speed setting (Pr. 37, Pr. 144)

You can change the PU (FR-DU07/FR-PU04/FR-PU07) monitor display or frequency setting to motor speed or machine speed.
Parameter
Name
Number
37
Speed display
144
Speed setting switchover
*1
The maximum value of the setting range differs according to the Pr.1 Maximum frequency and it can be calculated from the following formula.
Pr.37 (set maximum value)
Note that Pr.37 (set maximum value) is 9998 if the result of the above formula exceeds 9998.
*2
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 156)
⋅ To display the machine speed, set in Pr. 37 the machine speed for 60Hz operation.
⋅ When displaying the motor speed, set the number of motor poles (2, 4, 6, 8, 10) or number of motor poles + 100 (102, 104,
106, 108, 110) to Pr. 144.
⋅ When both Pr. 37 and Pr. 144 have been set, their priorities are as given below.
Pr. 144, 102 to 110 > Pr. 37, 1 to 9998 > Pr. 144, 2 to 10
⋅ When the running speed monitor is selected, each monitor and setting are determined by the combination of Pr. 37
and Pr. 144 as listed below. (The units within the thick frame are the initial values.)
Pr. 37
Pr. 144
Output Frequency
Setting
Setting
0
0
(initial
2 to 10
value)
102 to 110
0
1 to 9998
2 to 10
102 to 110
Motor speed r/min conversion formula............ frequency × 120/number of motor poles (Pr. 144)
*3
Machine speed conversion formula................... Pr. 37 × frequency/60Hz
For Pr. 144 in the above formula, the value is "Pr. 144-100" when "102 to 110" is set in Pr. 144 and the value is "4" when Pr. 37 = 0 and Pr. 144 = 0.
*4
The increments for Hz are 0.01Hz, machine speed are 1m/min, and r/min are 1r/min.
CAUTION
⋅ In the V/F control mode, the output frequency of the inverter is displayed in terms of synchronous speed, and therefore, it is
unequal to the actual speed by motor slip.
⋅ When the running speed display is selected at the setting of Pr. 37 "0" and Pr. 144 "0", the monitor display is provided on the
assumption that the number of motor poles is 4. (1800r/min is displayed at 60Hz)
⋅ Refer to Pr. 52 when you want to change the PU main monitor (PU main display).
⋅ Since the panel display of the operation panel (FR-DU07) is 4 digits in length, the monitor value of more than "9999" is
displayed "----".
Make sure that the settings of the running speed and number of motor poles are correct. Otherwise, the motor
might run at extremely high speed, damaging the machine.
♦ Parameters referred to ♦
Pr. 52 DU/PU main display data selection
Speed display and speed setting
DU/PU main display data selection
Cumulative monitor clear
Terminal FM, AM function selection
Setting of reference of terminal FM and AM
Terminal FM, AM calibration
Initial Value
0
4
65535 x 60 (Hz)
<
Pr.1(Hz)
Set Frequency
Monitor
Monitor
Hz
Hz
r/min
*3
Hz
Machine speed
Machine speed
*3
Hz
CAUTION
Refer to page 116
Monitor display and monitor output signal
Parameter that must be set
Setting Range
0
1 to 9998
*1
0, 2, 4, 6, 8, 10, 102,
104, 106, 108, 110
Running Speed
Monitor
Hz
r/min
Hz
r/min
r/min
r/min
*3
Hz
Machine speed
Machine speed
*3
Hz
r/min
Refer to
Pr. 37, Pr. 144
Pr. 52, Pr. 170, Pr. 171,
Pr. 268, Pr. 891
Pr. 54, Pr. 158, Pr. 867
Pr. 55, Pr. 56, Pr. 867
Pr. 900, Pr. 901
Description
Frequency display, setting
Set the machine speed at 60Hz.
Set the number of motor poles when
displaying the motor speed.
Frequency Setting
Parameter Setting
Hz
*3
Hz
*3
r/min
*3
*3
Hz
*3
Machine speed
*3
Hz
*3
Page
115
116
121
121
123
*3
4
115

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