Using An Analog Signal (Current Input) To Give A Frequency Command - Mitsubishi Electric FR-A820-00046 Instruction Manual

Basic operation procedure (PU operation)
4.5.5

Using an analog signal (current input) to give a frequency command

NOTES Use the operation panel (FR-DU08) (FWD or REV key) to give a start command.
Use the outputs from the current signal source (4 to 20 mA) to give a frequency command (by con-
necting it across terminals 4 and 5 (current input)).
Turn ON the AU signal.
Set Pr. 79 "Operation mode selection" ="4" (External/PU combination operation mode 2).
Connection diagram
Fig. 4-7:
Example Operation example: Operate at 60 Hz.
Screen at power-ON
The monitor display appears.
Changing the operation mode
Set "4" in Pr. 79. [PU] and [EXT] indicators are lit. (For setting value change, refer to page 4-6.)
Terminal 4 input selection
Turn ON the terminal 4 input selection signal (AU). Input to the terminal 4 is enabled.
Start
Press
Acceleration ➔ constant speed
Input 20 mA. The frequency value on the indication increases in Pr. 7 "Acceleration time", and "
appears.
Deceleration
Input 4 mA or less.The frequency value on the indication decreases in Pr. 8 "Deceleration time", and the motor stops
rotating with "
Stop
Press
Tab. 4-14:
4 - 20
AU signal
Current signal
source
(4 to 20 mA DC)
Frequency setting by analog current input
or . [FWD] or [REV] flickers as no frequency command is given.
" (0.00 Hz) displayed. [FWD] or [REV] indicator flickers.
. [FWD] or [REV] indicator turns OFF.
Operate the inverter by using the analog current input
Inverter
Operation panel
AU
(FR-DU08)
SD
4(+)
5(-)
Operation
Basic operation
I002448E
" (60.00 Hz)