Mitsubishi Electric 800 Series Instruction Manual page 273

5.8.1 Speed display and rotations per minute setting
The monitor display unit and the frequency setting on the operation panel can be switched to motor speed and machine speed.
Pr.
37 Speed display
M000
505 Speed setting reference
M001
144 Speed setting
M002 switchover
*1 The maximum value of the setting range differs according to the Pr.1 Maximum frequency, Pr.505 Speed setting reference, and it can be
calculated from the following formula.
The maximum value of Pr.37 < 65535  Pr.505 / Pr.1 setting value (Hz).
The maximum setting value of Pr.37 is 9998 if the result of the above formula exceeds 9998.
 Display in speed (Pr.37, Pr.144)
• Set the number of motor poles (2, 4, 6, 8, 10, 12) for Pr.144, or the number of motor poles + 100 (102, 104, 106, 108, 110,
112) to display the motor speed.
• The Pr.144 setting will change automatically when setting the motor poles with Pr.81 Number of motor poles. Pr.81 will
not automatically change when Pr.144 is changed.
Example 1) Changing the initial value of Pr.81 to "2" will change Pr.144 from "4" to "2".
Example 2) When setting Pr.81 = "2" while Pr.144 = "104", Pr.144 will change from "104" to "102".
 Display in motor speed (Pr.37, Pr.505)
• To display in the machine speed, set Pr.37 to the machine speed at the frequency set in Pr.505.
• For example, when Pr.505 is set to 60 Hz and Pr.37 is set to "1000", the operation panel indicates "1000" as the monitor
value of machine speed while the output frequency is 60 Hz. "500" is displayed while the output frequency is 30 Hz.
272
5. PARAMETERS
5.8 (M) Monitor display and monitor output signal
Name Initial value
0
60 Hz
4
Setting range
0 Frequency display and setting
Set the machine speed for Pr.505.
*1
1 to 9998
1 to 590 Hz Set the reference speed for Pr.37.
0, 2, 4, 6, 8, 10, 12, Set the number of motor poles when displaying the
102, 104, 106, 108, motor speed.
110, 112
Description