125
Monitor display and monitor output signal
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4.11 Monitor display and monitor output signal
4.11.1 Speed display and speed setting (Pr. 37, Pr. 144)
*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.
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 173)
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.)
Purpose
Parameter that must be set
Refer to
Page
Display motor speed
Set speed
Speed display and speed setting
Pr. 37, Pr. 144
125
Change PU monitor display data
DU/PU main display data selection
Cumulative monitor clear
Pr. 52, Pr. 170, Pr. 171,
Pr. 268, Pr. 891
126
Change of the monitor output from
terminal CA and AM
Terminal CA, AM function selection
Pr. 54, Pr. 158, Pr. 867, Pr. 869
126
Set the reference of the monitor
output from terminal CA and AM
Setting of reference of terminal CA and AM
Pr. 55, Pr. 56, Pr. 867
131
Adjust terminal CA, AM outputs
Terminal CA, AM calibration
Pr. 900, Pr. 901, Pr. 930, Pr. 931
133
You can change the PU (FR-DU07/FR-PU04/FR-PU07) monitor display or frequency setting to motor speed or
machine speed.
Parameter
Number
Name
Initial Value
Setting Range
Description
37
Speed display
0
0
Frequency display, setting
1 to 9998
*1
Set the machine speed at 60Hz.
144
Speed setting switchover
4
0, 2, 4, 6, 8, 10, 102,
104, 106, 108, 110
Set the number of motor poles when
displaying the motor speed.
Pr.37
(set maximum value)
<
65535 x 60 (Hz)
Pr.1
(Hz)
Pr. 37
Setting
Pr. 144
Setting
Output Frequency
Monitor
Set Frequency
Monitor
Running Speed
Monitor
Frequency Setting
Parameter Setting
0
(initial
value)
0
Hz
Hz
r/min
*3
Hz
2 to 10
Hz
Hz
r/min
*3
Hz
102 to 110
r/min
*3
r/min
*3
r/min
*3
r/min
*3
1 to 9998
0
Hz
Hz
Machine speed
*3
Hz
2 to 10
Machine speed
*3
Machine speed
*3
Machine speed
*3
Machine speed
*3
102 to 110
Hz
Hz
r/min
*3
Hz
*3
Motor speed r/min conversion formula............ frequency
u
120/number of motor poles (
Pr. 144
)
Machine speed conversion formula
................... Pr. 37
u
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
Under V/F control, the output frequency of the inverter is displayed in terms of synchronous speed, and therefore, displayed
value = actual speed + 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 "----".
When an optional FR-A7ND or FR-A7NL card is mounted, frequency is displayed regardless of
Pr. 37
and
Pr. 144
setting.
CAUTION
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.
i
Parameters referred to
i
Pr. 52 DU/PU main display data selection
Refer to page 126
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