Mitsubishi Electric FR-F800, Instruction Manual

Page: 150 / 834

Basic operation procedure (PU operation) Basic operation
4 - 20
4.5.5 Using an analog signal (current input) to give a frequency command
Connection diagram
쑶
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).
I002448E
Fig. 4-7: Frequency setting by analog current input
Example
쑴
Operation example: Operate at 60 Hz.
Operation
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 or . [FWD] or [REV] flickers as no frequency command is given.
"
Acceleration
➔
constant speed
Input 20 mA. The frequency value on the indication increases in Pr. 7 "Acceleration time", and " " (60.00 Hz)
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 " " (0.00 Hz) displayed. [FWD] or [REV] indicator flickers.
Stop
Press . [FWD] or [REV] indicator turns OFF.
Tab. 4-14: Operate the inverter by using the analog current input
5(-)
4(+)
SD
AU
Operation panel
(FR-DU08)
Inverter
AU signal
Current signal
source
(4 to 20 mA DC)