Mitsubishi Electric FR-A700 Technical Manual page 189

(6) Override function [Pr. 252, 253]
Use the override function to change the main speed
at a fixed ratio.
When an override is selected, the terminal 1 or
terminal 4 is used for the main speed setting and the
terminal 2 for the override signal. (When the main
speed of the terminal 1 or terminal 4 is not input,
compensation by the terminal 2 is invalid.)
When inputting compensation
operation or remote setting, set [Pr. 28 Multi-speed
input compensation selection = 1] .(Refer to page 227)
Using [Pr. 252, 253], set the override range. Use a
following formula for the set frequency for override.
Set
= Main speed set frequency (Hz)
frequency
(Hz)
Main speed set frequency (Hz): Terminal 1, 4 input, multi-
Compensation amount (%): Terminal 2 input
200
150
100
Bias 50
[Pr.252]
0
0V
Voltage across terminals 2 and 5
[Pr. ] Name
252 Override bias
253 Override gain
A700 F700
to multi-speed
Compensation
amount(%)
100(%)
speed setting
Initial value
(50% to 150%)
Gain
[Pr.253]
2.5V 5V
(5V) (10V)
Initial Value
50%
150%
Override
setting
Main
speed
Override connection diagram
Example: When [Pr. 73 = 5]
The set frequency changes as shown below according
to the terminal 1 (main speed) and terminal 2
(auxiliary) inputs.
90
60
45
30
15
0
0
Terminal 1 input voltage (V)
Setting
Range
0 to 200% Set the bias side compensation value of override function.
0 to 200% Set the gain side compensation value of override function.
223
PARAMETER
Forward
Inverter
rotation
STF
SD
10
2
5
(+)
1
(-)
Terminal 2
5VDC input(150%)
Terminal 2
2.5VDC input(100%)
Terminal 2
0V input(50%)
2.5 5
Description
2