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Monitor display and monitor output signal
5.12 Monitor display and monitor output signal
5.12.1 Speed display and speed setting (Pr. 37)
The above parameters can be set when Pr. 160User group read selection = "0". (Refer to page 167)
∗ The maximum value of the setting range differs according to the Pr. 1 Maximum frequency (Pr.18 High speed maximum frequency) and it can be calculated from the
following formula.
Note that the maximum setting value of Pr. 37 is 9998 if the result of the above formula exceeds 9998.
To display the machine speed, set in Pr. 37 the machine speed for 60Hz operation.
For example, when Pr. 37 = "1000", "1000" is displayed on the output frequency and set frequency monitor when the
running frequency is 60Hz. When running frequency is 30Hz, "500" is displayed.
∗1 Machine speed conversion formula ..........Pr. 37 × frequency/60Hz
∗2 Hz is displayed in 0.01Hz increments and machine speed is in 0.001.
Purpose Parameter that should be Set
Refer to
Page
Display motor speed
Set speed
Speed display and speed setting Pr. 37
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Change the monitored item
displayed on the operation panel
Operation panel main display
data selection
Cumulative monitor clear
Pr. 52, Pr. 170, Pr. 171, Pr. 268,
Pr. 563, Pr. 564
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The monitor display and frequency setting of the operation panel can be changed to the machine speed.
Parameter
Number
Name
Initial
Value
Setting Range Description
37
Speed display
0
0 Frequency display, setting
0.01 to 9998∗ Machine speed at 60Hz.
Maximum setting value of Pr. 37 <
16777.215 × 60 (Hz)
Setting value of Pr. 1 (Pr.18) (Hz)
Pr. 37 Setting
Output Frequency
Monitor
Set Frequency
Monitor
Frequency Setting Parameter Setting
0 (initial value) Hz Hz Hz
Hz
0.01 to 9998 Machine speed
∗1 Machine speed ∗1 Machine speed ∗1
NOTE
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. The display changes to the actual speed (estimated value calculated based
on the motor slip) when Advanced magnetic flux vector control was selected or slip compensation was valid.
Since the panel display of the operation panel is 4 digits in length, the monitor value of more than "9999" is displayed "----".
While the machine speed is displayed on the monitor, values of other parameters related to speed (Pr. 1 , etc.) are in
frequency increments. Set other parameters (Pr. 1, etc) related to speed in increments of frequency.
Due to the limitations on the resolution of the set frequency, the indication in the second decimal place may differ
from the setting.
When frequency or set frequency is monitored through FL remote communication, frequency is displayed for
monitor description regardless of Pr. 37 setting.
CAUTION
Make sure that the running speed setting is correct.
Otherwise, the motor might run at extremely high speed, damaging the machine.
Parameters referred to
Pr. 1 Maximum frequency, Pr.18 High speed maximum frequency Refer to page 105
Pr. 52 DU/PU main display data selection
Refer to page 147
Pr. 800 Control method selection Refer to page 93