Monitor Display And Monitor Output Signal; Speed Display And Speed Setting (Pr. 37) - Mitsubishi Electric FR-D720-008 Instruction Manual

4.11 Monitor display and monitor output signal

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

4.11.1 Speed display and speed setting (Pr. 37)

The monitor display and frequency setting of the PU (FR-PU04/FR-PU07) can be changed to the machine speed.
Parameter
Name
Number
37 Speed display
The above parameter can be set when Pr. 160 Extended function display selection = "0". (Refer to page 160)
* 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.
Maximum setting value of Pr. 37
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.
Output Frequency
Pr. 37 Setting
0 (initial value)
0.01 to 9998 Machine speed
∗1 Machine speed conversion formula ......... Pr. 37 × frequency/60Hz
∗2
Hz is displayed in 0.01Hz increments and machine speed is in 0.001.
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 slip compensation was made valid.
Refer to Pr. 52 when you want to change the PU main monitor (PU main display).
Since the panel display of the operation panel is 4 digits in length, the monitor value of more than "9999" is displayed as "----
".
When the machine speed is displayed on the FR-PU04/FR-PU07, do not change the speed by using an up/down key in
the state where the set speed exceeding 65535 is displayed. The set speed may become arbitrary value.
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.
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
Pr. 52 DU/PU main display data selection
Speed display and speed setting
Monitor display/PU main display
data selection
Cumulative monitor clear
Terminal AM function selection
Terminal AM standard setting
Terminal AM calibration
Initial
Setting Range
Value
0
0.01 to 9998∗
16777.215 × 60 (Hz)
<
Setting value of Pr. 1 (Pr. 18) (Hz)
Set Frequency
Monitor Monitor
Hz Hz
Machine speed
∗1
CAUTION
Refer to page 126

Monitor display and monitor output signal

Parameter that should be Set
Pr. 52, Pr. 158, Pr. 170, Pr. 171,
Pr. 268, Pr. 563, Pr. 564, Pr. 891
0 Frequency display, setting
Machine speed at 60Hz.
Frequency Setting
Hz
Machine speed
∗1 ∗1
Refer to page 81
Refer to
Page
Pr. 37
Pr. 158
Pr. 55, Pr. 56
Pr. 901
Description
Parameter Setting
Hz
125
126
126
131
132
4
125