Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 375

• When Pr.79 = "0 or 2", the inverter starts up in the External operation mode at power-ON. (When using the Network
operation mode, refer to
• When parameter changing is seldom necessary, setting "2" fixes the operation mode to the External operation mode.
When frequent parameter changing is necessary, setting "0" (initial value) allows the operation mode to be changed easily
to the PU operation mode by pressing
return to the External operation mode.
• The STF and STR signal are used as a start command, and the voltage to terminal 2 and 4, current signal, multi-speed
signal, and JOG signal are used as a frequency command.
Forward rotation start
Reverse rotation start
Switch
Frequency setting
potentiometer
Potentiometer
 PU operation mode (Pr.79 = "1")
• Select the PU operation mode when giving start and frequency commands by only the key operation of the operation panel
or the parameter unit.
Also select the PU operation mode when making communication using the PU connector.
• When Pr.79 ="1", the inverter starts up in the PU operation mode at power-ON. The mode cannot be changed to other
operation modes.
• The setting dial of the operation panel can be used for setting like a potentiometer. (Refer to Pr.161 Frequency setting/
key lock operation selection on
• When the PU operation mode is selected, the PU operation mode signal (PU) can be output.
For the terminal used for the PU signal, set "10 (positive logic)" or "110 (negative logic)" in any of Pr.190 to Pr.196 (Output
terminal function selection) to assign the function.
Operation panel (FR-DU08)
 PU/External combined operation mode 1 (Pr.79 = "3")
• Select the PU/External combined operation mode 1 when giving a frequency command from the operation panel or the
parameter unit and giving a start command with the external start switches.
• Set "3" in Pr.79. The mode cannot be changed to other operation modes.
• When a frequency command is given from the external signal by multi-speed setting, it has a higher priority than the
frequency command from the PU. Also, when AU is set to "ON", the command signal is output via terminal 4.
Forward rotation
start
Reverse rotation
start
Switch
 PU/External combined operation mode 2 (Pr.79 = "4")
• Select the PU/External combined operation mode 2 when giving a frequency command from the external potentiometer,
or multi-speed and JOG signals, and giving a start command by key operation of the operation panel or the parameter unit.
374
5. PARAMETERS
5.9 (D) Operation command and frequency command
page 378.)
of the operation panel. After switching to the PU operation mode, always
Inverter
STF
STR
SD
10
2
5
page 324.)
Inverter
STF
STR
SD
Operation panel
(FR-DU08)