Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

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Parameters (M) Monitor display and monitor output signal
FR-A800 5 - 341
5.11.1 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.
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" or "12" 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 = "60 Hz" and Pr. 37 = "1000", the running speed monitor will display
"1000" at the running speed of 60 Hz.When running frequency is 30 Hz, "500" is displayed.
Changing the monitored value and speed setting increment (Pr. 811)
●
When Pr. 811 = "1 or 11", the speed setting for PU input and RS-485 communication, speed setting
from communication option and the running speed monitor will be in increments of 0.1 r/min.
●
For availability of changing the speed setting increments via communication options, refer to the
Instruction Manual of each communication option.
Pr. Name
Initial value
Setting range Description
FM CA
37
M000
Speed display 0
0 Frequency display and setting
1 to 9998
Set the machine speed for Pr. 505.
505
M001
Speed setting
reference
60 Hz 50 Hz 1 to 590 Hz Set the reference speed for Pr. 37.
144
M002
Speed setting
switchover
4
0, 2, 4, 6, 8, 10, 12,
102, 104, 106, 108,
110, 112
Set the number of motor poles when
displaying the motor speed.
811
D030
Set resolution
switchover
0
Speed setting, running
speed monitor
increments on PU,
RS-485 communication,
communication options
Torque limit
setting increments
Pr. 22,
Pr. 812 to Pr. 817
0 1 r/min
0.1%
1 0.1 r/min
10 1 r/min
0.01%
11 0.1 r/min