Mitsubishi Electric FR-A720-0.4K Instruction Manual page 286

Frequency/torque setting by analog
input (terminal 1, 2, 4)
Forward
STF
rotation
SD
0 to 5VDC
10
Frequency
2
setting
5
Connection diagram using
terminal 2 (0 to 5VDC)
Forward STF
rotation
SD
0 to 10VDC
10E
Frequency 2
setting
5
Connection diagram
using terminal 2 (0 to 10VDC)
Forward
rotation
4 to 20mADC
Current
Frequency
input
setting
equipment
Connection diagram using
terminal 4 (4 to 20mADC)
Reverse
Set frequency
(Hz)
rotation
60
Reversible
Not reversible
-5
0 Terminal 1 input (V)
(-10)
Compensation input characteristic
when STF is on
♦ Parameters referred to ♦
Pr. 22 Stall prevention operation level
Pr. 125 Terminal 2 frequency setting gain frequency, Pr. 126 Terminal 4 frequency setting gain frequency
Pr. 252, Pr. 253 Override bias/gain
Pr. 858 Terminal 4 function assignment, Pr. 868 Terminal 1 function assignment
276
(2) Perform operation by analog input voltage
Inverter
⋅ The frequency setting signal inputs 0 to 5VDC (or 0 to 10VDC) to across
the terminals 2-5. The 5V (10V) input is the maximum output frequency.
The maximum output frequency is reached when 5V (10V) is input.
⋅ The power supply 5V (10V) can be input by either using the internal
power supply or preparing an external power supply. The internal power
supply outputs 5VDC across terminals 10-5, or 10V across terminals
10E-5.
Terminal
Inverter
10
10E
⋅ When inputting 10VDC to the terminal 2, set any of "0, 2, 4, 10, 12, 14"
in Pr. 73. (The initial value is 0 to 5V)
⋅ Setting "1 (0 to 5VDC)" or "2 (0 to 10VDC)" in Pr. 267 changes the
terminal 4 to the voltage input specification. When the AU signal turns
on, the terminal 4 input becomes valid.
REMARKS
The wiring length of the terminal 10, 2, 5 should be 30m maximum.
(3) Perform operation by analog input current
Inverter
⋅ When the pressure or temperature is controlled constant by a fan, pump,
STF
etc., automatic operation can be performed by inputting the output signal
AU
4 to 20mADC of the adjuster to across the terminals 4-5.
SD
⋅ The AU signal must be turned on to use the terminal 4.
⋅ Setting any of "6, 7, 16, 17" in Pr. 73 changes the terminal 2 to the
4
current input specification. At this time, the AU signal need not be turned
5
on.
(4) Perform forward/reverse rotation by analog input
(polarity reversible operation)
Forward
rotation
⋅ Setting any of "10 to 17" in Pr. 73 enables polarity reversible operation.
⋅ Providing ± input (0 to ±5V or 0 to ±10V) to the terminal 1 enables
forward/reverse rotation operation according to the polarity.
+5
(+10)
Refer to page 148
Refer to page 277
Inverter Built-in Power Frequency Setting
Supply Voltage
5VDC 0.030Hz/60Hz
10VDC 0.015Hz/60Hz
Refer to page 273
Pr. 73 (terminal 2
Resolution input voltage)
0 to 5VDC input
0 to 10VDC input
Refer to page 280