Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 376

• Set "4" in Pr.79. The mode cannot be changed to other operation modes.
Frequency setting
potentiometer
Potentiometer
 Switchover mode (Pr.79 = "6")
• PU, External and Network operation (when RS-485 terminals or communication option is used) can be switched among
during operation.
Operation mode
switchover
Set to the PU operation mode on the operation panel and parameter unit.
External operation→PU • As the direction of rotation, the direction that was active by External operation is continued.
operation • For the setting frequency, the setting of the potentiometer (frequency command) is continued. (However,
The switchover command to the Network operation mode is transmitted via communication.
External operation→NET • As the direction of rotation, the direction that was active by External operation is continued.
operation • The setting by the setting potentiometer (frequency command) is kept. (However, note that the setting
Press the External operation key on the operation panel and parameter unit.
PU operation→External
• The direction of operation is determined by the External operation input signal.
operation
• The setting frequency is determined by the external frequency command signal.
PU operation→NET The switchover command to the Network operation mode is transmitted via communication.
operation • For the direction of operation and setting frequency, the status during PU operation is continued.
The switchover command to the External operation mode is transmitted via communication.
NET operation→External
• The direction of operation is determined by the External operation input signal.
operation
• The setting frequency is determined by the external frequency command signal.
NET operation→PU Switch to the PU operation mode on the operation panel and parameter unit.
operation • For the direction of operation and frequency, the status during Network operation is continued.
 PU operation interlock (Pr.79 = "7")
• The operation mode can be forcibly switched to the External operation mode by input of the PU operation external interlock
(X12) signal. This function prevents the operation mode from being accidentally unswitched from the PU operation mode.
If the operation mode left unswitched from the PU operation mode, the inverter does not reply to the commands sent
through external commands.
• To input the X12 signal, set "12" in any of Pr.178 to Pr.189 (Input terminal function selection) to assign the function.
(For details on Pr.178 to Pr.189, 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
Switching of the operation mode (External, PU, and NET) is
ON enabled
Output is stopped during External operation.
Operation mode is forcefully changed to the External operation
mode.
OFF External operation is enabled.
Switching to the PU or NET operation mode from the External
operation mode is disabled.
*1 Depends on the Pr.77 Parameter write selection setting and other parameter write conditions. (Refer to
Inverter
Operation panel
(FR-DU08)
10
2
5
note that the setting disappears when the power is turned OFF or when the inverter is reset.)
disappears when the power is turned OFF or when the inverter is reset.)
page 496.)
Operation mode
Operation switchover/Operating status
Function/Operation
Parameter writing is enabled
Writing of parameters other than Pr.79 is disabled.
5.9 (D) Operation command and frequency command
*1
Parameter writing
page 328.)
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
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