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

Basic operation procedure (External operation)
4.6.5

Setting the frequency using an analog signal (current input)

NOTES 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
Fig. 4-11:
Example Operation example: Operate at 60 Hz.
Turning ON the power of the inverter
The monitor display turns ON.
Terminal 4 input selection
Turn ON the terminal 4 input selection signal (AU). Input to the terminal 4 is enabled.
Start
Turn ON the start switch (STF or STR). [FWD] or [REV] indicator flickers as no frequency command is given.
Acceleration ➔ constant speed
Input 20 mA. The frequency value indicated on the display increases for the time set in Pr. 7 "Acceleration time", and is
fixed at "
during the reverse rotation.
Deceleration
Input 4 mA or less. The frequency value indicated on the display decreases for the time set in Pr. 8 "Deceleration time",
and the motor stops rotating at "
Stop
Turn OFF the start switch (STF or STR). [FWD] or [REV] indicator turns OFF.
Tab. 4-19:
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. 184 "AU terminal function selection" must be set to "4" (initial value) (AU signal).
Parameters referred to
Pr. 7, Pr. 8
Pr. 184
4 - 28
Forward rotation start
Reverse rotation start
Switch
Current signal
source
(4–20 mA DC)
Frequency setting by analog current input
" (60.00 Hz). [FWD] indicator turns ON during the forward rotation, and [REV] indicator turns ON
" (0.00 Hz). [FWD] or [REV] indicator flickers.
Operate the inverter by using the analog current input
Acceleration time, Deceleration time
AU terminal function selection
Inverter
STF
STR
AU
PC
4(+)
5(-)
Operation
Basic operation
I002447E_G
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