Mitsubishi Electric 800 Series Instruction Manual (Function page 257

• Set "4" in Pr.79. The mode cannot be changed to other operation modes.
Frequency setting
potentiometer
Potentiometer
 Operation mode switchover during operation (Pr.79 = "6")
• During operation, the inverter operation mode can be switched from among the PU, External, and Network (Network
operation mode is selectable via RS-485 communication or Ethernet communication, or when a communication option is
used).
Operation mode
switchover
External operation→PU
operation
External operation→NET
operation
PU operation→External
operation
PU operation→NET
operation
NET operation→External
operation
NET operation→PU
operation
 PU operation interlock (Pr.79 = "7")
• The operation mode can be forcibly switched to the External operation mode by turning OFF the PU operation external
interlock (X12) signal. This function will be usable in a case where the inverter does not reply to external command signals
during operation due to the operation mode accidentally unswitched from the PU operation mode to the External operation
mode.
• To input the X12 signal, set "12" in any parameter from Pr.178 to Pr.184 (Input terminal function selection) to assign
the function. (For details on Pr.178 to Pr.184, refer to
• Set Pr.79 = "7" (PU operation interlock).
• If the X12 signal is not assigned, the function of the MRS signal is switched to the PU operation interlock signal from MRS
(output stop).
X12 (MRS) signal
ON
OFF
*1 Depends on the Pr.77 Parameter write selection setting and other parameter write conditions. (Refer to
256
11. (D) Operation Command and Frequency Command
11.1 Operation mode selection
Inverter
10
2
5
Use the operation panel to change the operation mode to the PU operation mode.
• The direction of motor rotation does not change due to the operation mode change from the External
operation mode.
• The previous setting of frequency which has been set using a potentiometer (frequency command) is taken
over. (However, note that the setting disappears when the power is turned OFF or when the inverter is reset.)
Give the command through communication to change the operation mode to the Network operation mode.
• The direction of motor rotation does not change due to the operation mode change from the External
operation mode.
• The previous setting of frequency which has been set using a potentiometer (frequency command) is taken
over. (However, note that the setting disappears when the power is turned OFF or when the inverter is reset.)
Press the key on the operation panel to change the operation mode to the External operation mode.
• The direction of operation is determined by external input signals used in the External operation mode.
• The setting frequency is determined by the external frequency command signal.
Give the command through communication to change the operation mode to the Network operation mode.
• The direction of motor rotation and the frequency setting does not change due to the operation mode change
from the PU operation mode.
Give the command through communication to change the operation mode to the External operation mode.
• The direction of operation is determined by external input signals used in the External operation mode.
• The setting frequency is determined by the external frequency command signal.
Use the operation panel to change the operation mode to the PU operation mode.
• The direction of motor rotation and the frequency setting does not change due to the operation mode change
from the Network operation mode.
Operation mode
Switching of the operation mode (External, PU, and NET) is
enabled. The signal is OFF during External operation.
Operation mode is forcefully changed to the External operation
mode.
External operation is enabled.
Switching to the PU or NET operation mode from the External
operation mode is disabled.
Operation panel
Operation/operating status
page 368.)
Function/Operation
Enabled.
Disabled except for Pr.79.
*1
Parameter writing
page 209.)