Mitsubishi Electric 800 Series Instruction Manual (Function page 47

• Other adjustment methods for the frequency setting voltage gain are the following: adjustment by applying a voltage directly
across terminals 2 and 5, and adjustment using a specified point without applying a voltage across terminals 2 and 5. (Refer
to page
Parameters referred to
Pr.125 Terminal 2 frequency setting gain
C2(Pr.902) Terminal 2 frequency setting bias
C4(Pr.903) Terminal 2 frequency setting
2.6.5 Setting the frequency using an analog signal
(current input)
• Turn ON the STF/STR signal to give a start command.
• Turn ON the AU signal.
• Set Pr.79 Operation mode selection = "2" (External operation mode).
[Connection diagram]
Forward rotation start
Reverse rotation start
Switch
Current signal
source
(4 to 20mADC)
The following shows the procedure to operate at 60 Hz.
Operating procedure
1.
Turning ON the power of the inverter
The operation panel is in the monitor mode.
2.
Assignment of AU signal
Set Pr.180 RL terminal function selection = "4" to assign the AU signal to terminal RL.
3.
Selecting the input via terminal 4
Turn ON the Terminal 4 input selection (AU) signal. Input via terminal 4 to the inverter is enabled.
4.
Start
Turn ON the start switch (STF/STR signal). The RUN LED blinks as no frequency command is given.
5.
Acceleration → constant speed
Input a current of 20 mA to the inverter from the regulator. The frequency value on the monitor increases according
to the setting of Pr.7 Acceleration time, and "60.00" (60.00 Hz) appears on the monitor. The RUN LED is ON during
forward rotation and blinks slowly during reverse rotation.
6.
Deceleration
Input a current of 4 mA or less. The frequency value on the monitor decreases according to the setting of Pr.8
Deceleration time, "0.00" (0.00 Hz) appears on the monitor, and the motor stops rotating. The RUN LED blinks.
7.
Stop
Turn OFF the start switch (STF/STR signal). The RUN LED turns OFF.
46
2. Basic Operation
2.6 Basic operation procedure (External operation)
358.)
frequencypage 358
frequencypage 358
gainpage 358
Inverter
STF
STR
RL(AU)
SD
4(+)
5(-)