Mitsubishi Electric 800 Series Instruction Manual page 296

External operation mode (Pr.79 = "0" (initial value), "2")
• Select the External operation mode when the start command and the frequency command are applied from a frequency
setting potentiometer, start switch, etc. which are provided externally and connected to the control circuit terminals of the
inverter.
• Generally, parameter change cannot be performed in the External operation mode. (Some parameters can be changed.
Refer to Pr.77 Parameter write selection
• 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 page
• 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 applying 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.
• 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
(D) Operation command and frequency command
page 251.)
300.)
of the operation panel. After switching to the PU operation mode, always
Inverter
STF
STR
SD
10
2
5
295
PARAMETERS
5
GROUP
D