Mitsubishi Electric FR-A800, Instruction Manual

Page: 171 / 1042

Basic operation Basic operation procedure (External operation)
FR-A800 4 - 23
쑶
Example
쑴
Operation example: Operate at 30 Hz.
Operation
Changing the operation mode
Set "3" in Pr. 79. [PU] and [EXT] indicators are lit. (For setting value change, refer to page 4-6.)
Setting the frequency
Turn to until the target frequency, " " (30.00 Hz), appears. The frequency flickers for about 5 s.
While the value is flickering, press to enter the frequency. " " and " " flicker alternately.
After about 3 s of flickering, the indication goes back to " " (monitor display).
(If is not pressed, the indication of the value goes back to " " (0.00 Hz) after about 5 s of flickering.
In that case, turn again and set the frequency.)
Start
➔
acceleration
➔
constant speed
Turn ON the start switch (STF or STR). The frequency value on the indication increases in Pr. 7 "Acceleration time",
and " " (30.00 Hz) appears. [FWD] indicator is lit during the forward rotation, and [REV] indicator is lit
during the reverse rotation.
(To change the set frequency, perform the operation in above step
. The previously set frequency appears.)
#
Deceleration
➔
stop
Turn OFF the start switch (STF or STR). The frequency value on the indication decreases in Pr. 8 "Deceleration
time", and the motor stops rotating with " " (0.00 Hz) displayed.
Tab. 4-15: Operate the inverter by using external signals
NOTES When both the forward rotation switch (STF) and the reverse rotation switch (STR) are ON, the
motor cannot be started. If both are turned ON while the inverter is running, the inverter 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"). (All are initial values.)
Setting Pr. 79 "Operation mode selection" = "3" also enables multi-speed operation.
If stopped using STOP/RESET key on the operation panel during the External operation, the
inverter enters the PU stop status.
("PS" appears on the operation panel.)
To reset the PU stop status, turn OFF the start switch (STF or STR), and then press PU/EXT key.
(Refer to page 5-194.)
Parameters referred to
Pr. 4 to Pr. 6 (multi-speed setting) => page 5-288
Pr. 7 Acceleration time => page 5-233
Pr. 8 Deceleration time => page 5-233
Pr. 178 STF terminal function selection => page 5-422
Pr. 179 STR terminal function selection => page 5-422
Pr. 79 Operation mode selection => page 5-263