Setting The Frequency Using An Analog Signal (Voltage Input) - Mitsubishi Electric FR-A820-00046 Instruction Manual

Basic operation procedure (External operation)
4.6.3

Setting the frequency using an analog signal (voltage input)

NOTES Turn ON the STF (STR) signal to give a start command.
Use the frequency setting potentiometer to give a frequency command (by connecting it across
terminals 2 and 5 (voltage input)).
Connection diagram
(The inverter supplies 5 V power to the frequency setting potentiometer (terminal 10).)
Fig. 4-10:
Example Operation example: Operate at 60 Hz.
Turning ON the power of the inverter
The monitor display turns ON.
Start
Turn ON the start switch (STF or STR). [FWD] or [REV] indicator flickers as no frequency command is given.
Acceleration ➔ constant speed
Turn the frequency setting potentiometer clockwise slowly to full. The frequency value indicated on the display
increases for the time set in Pr. 7 "Acceleration time", and is fixed at "
ON during the forward rotation, and [REV] indicator turns ON during the reverse rotation.
Deceleration
Turn the frequency setting potentiometer counterclockwise slowly to full. The frequency value indicated on the
display decreases for the time set in Pr. 8 "Deceleration time", and the motor stops rotating at "
[FWD] or [REV] indicator flickers.
Stop
Turn OFF the start switch (STF or STR). [FWD] or [REV] indicator turns OFF.
Tab. 4-17:
NOTES When both the forward rotation switch (STF) and the reverse rotation switch (STR) are turned ON,
the motor cannot be started. If both are turned ON while the motor is running, the motor deceler-
ates to a stop.
Pr. 178 "STF terminal function selection" must be set to "60" (or Pr. 179 "STR terminal function
selection" must be set to "61"). (Both settings are initial values.)
Parameters referred to
Pr. 7
Pr. 8
Pr. 178
Pr. 179
4 - 26
Forward rotation start
Reverse rotation start
Switch
Frequency setting
Potentiometer
Frequency setting by analog voltage input
Operate the inverter by using the analog voltage input
Acceleration time
Deceleration time
STF terminal function selection
STR terminal function selection
Inverter
STF
STR
PC
10
2
potentiometer
5
Operation
Basic operation
I002446E_G
" (60.00 Hz). [FWD] indicator turns
" (0.00 Hz).
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