Mitsubishi Electric FR-A700 Instruction Manual page 558

Frequency/torque setting by analog input (terminals 1, 2 and 4)
STF signal
Fig. 6-181: Auxiliary input characteristics
NOTE
When the Pr. 73 setting was changed, check the voltage/current input switch setting. Diffe-
rent setting may cause a fault, failure or malfunction. (Refer to page 6-372 for setting.)
Override function (Pr. 252, Pr. 253)
Use the override function to change the main speed at a fixed ratio.
Set any of "4, 5, 14, 15" in Pr. 73 to select an override.
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 made by the terminal 2 becomes invalid.)
Using Pr. 252 and Pr. 253, set the override range.
6 - 378
Output frequency
When voltage
across terminals 2-5
is 2.5V (5V)
−5V −2.5V
0 +2.5V +5V
(−10V) (−5V) (+5V) (+10V)
Forward rotation
ON
Forward rotation
Pr. 73 = 0–5
Forward rotation
Override
setting
Main speed
When voltage
across terminals
2-5 is 0V
Terminal 1
Reverse rotation
STF signal
ON
Reverse rotation
Fig. 6-182:
Inverter
Override connection diagram
Output frequency
When voltage
across terminals 2-5
is 2.5V (5V)
−5V −2.5V
0 +2.5V +5V
(−10V) (−5V) (+5V) (+10V)
Forward rotation
Forward rotation
Pr. 73 = 10–15
Parameter
When voltage
across terminals
2-5 is 0V
Terminal 1
I001187E
I001188E