Mitsubishi Electric 800 Series Instruction Manual page 278

• To use terminal 4, the AU signal needs to be turned ON.
Forward
rotation
4 to 20mADC
Current
Frequency
input
setting
equipment
Connection diagram using
terminal 4 (4 to 20mADC)
• Set "6 or 16" in Pr.73 and set the voltage/current input selection switch to I in order to input current through terminal 2. In
this case, the AU signal does not need to be turned ON.
Forward
rotation
4 to 20mADC
Current
Frequency
input
setting
equipment
Connection diagram using
terminal 2 (4 to 20mADC)
 Performing forward/reverse rotation with the analog input (reversible
operation)
• The reversible operation by terminal 2 (terminal 4) is enabled by setting "10, 11, or 16" in Pr.73 and adjusting Pr.125
(Pr.126) Terminal 2 frequency setting gain frequency (Terminal 4 frequency setting gain frequency), C2 (Pr.902)
Terminal 2 frequency setting bias frequency to C7 (Pr.905) Terminal 4 frequency setting gain.
• The following shows the reversible operation by terminal 2 (0 to 5 V) input.
1) Set "11" in Pr.73 to enable the reversible operation. Set the frequency at maximum analog input in Pr.125.
2) Set 1/2 of the C4 (Pr.903) setting value in C3 (Pr.902).
3) Reverse operation is performed when 0 to 2.5 VDC is input, and forward rotation when 2.5 to 5 VDC.
Reverse Forward
rotation rotation
Pr.125
Reversible
Not reversible
C2(Pr.902)
0 2.5V
C3(Pr.902) C4(Pr.903)
Frequency setting signal
Example of reversible operation
NOTE
• Note that the reverse rotation operation is performed when analog input stops (only the start signal is input) while the reversible
operation is set.
• When the reversible operation is enabled, the reversible operation by terminal 4 is performed in the initial setting (reverse
operation is performed when 0 to 4 mA is input, and forward operation when 4 to 20 mA).
Parameters referred to
Pr.125 Terminal 2 frequency setting gain frequency, Pr.126 Terminal 4 frequency setting gain
Inverter
STF
AU Voltage/current
input switch
SD
4
5
Inverter
STF
Voltage/current
SD input switch
2
5
Terminal 2 input (V)
5V
frequencypage 282
12.(T) Multi-Function Input Terminal Parameters
12.1 Analog input selection
11
12
13
14
15
16
17
18
19
20
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