Mitsubishi Electric FR-A700 Technical Manual page 540

4.7 Automatic operation of fan, pump or the like using
speed setter
[Auto-manual switch-over operation]
F
MCCB
Power
supply
Frequency setting
potentiometer for
manual operation
PID speed setter
*1 When the power supply is 400V class, install a step-down transformer.
*2 Using the frequency setting gain/bias function of the inverter, you can set the relationship between speed setter output and
output frequency as shown above. Refer to page 217.
[FR-AL DC tachometer follower]
*3 The FR-AL has the manual-auto change-over, start signal switch and frequency meter.
common
(common)
Fault signal
Ready
OFF ON
M
C
MC
T
*1
MC
Manual
Auto
Start signal
2W1k
4 to 20mADC
FR-AL
DC tach.
follower
PID speed
setter
B C
Inverter
R U
S V
T W
A
B
AU
Fault signal
STF(STR) C
SD
10
60Hz
2
5
4
Ground
0Hz
COM
AUT AU
STF STF(STR)
SD1 SD
SD2
FM FM
10 10
2 2
5 5
4 to 20mA
4
Inverter
574
PRACTICAL CIRCUITS
Motor
IM
Related parameters
Frequency setting current bias [C5, C6(Pr. 904)]
Frequency setting current gain [Pr. 126, C7(Pr. 905)]
Upper limit
[Pr. 1]
Bias
[C5]
4mA
20mA
Speed setter
[C6] [C7]
output
Gain
[Pr. 126]