Mitsubishi Electric FR-A700 Instruction Manual page 500

Monitor display and monitor output signals
NOTES In the V/f control mode, the output frequency of the inverter is displayed in terms of synchro-
nous speed, and therefore, it is unequal to the actual speed by motor slip. This display
changes to the actual speed (estimated value calculated based on the motor slip) when the
advanced magnetic flux vector control or real sensorless vector control is selected, and
actual speed from the encoder when encoder feed back control or vector control is per-
formed.
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 "----".
After setting the running speed in 0.1r/min increments (Pr. 811 = "1, 11"), changing the set-
ting increments to 1r/min increments (Pr. 811 = "0, 10") changes the speed resolution from
0.1r/min to 0.3r/min (four poles), which may round down 0.1r/min increments.
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.
When an optional FR-A7ND, FR-A7NL or FR-A7NCA is mounted, frequency is displayed
(setting) regardless of Pr. 37 and Pr. 144.
b
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.
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Parameter