Mitsubishi Electric FR-D720S SC EC Instruction Manual page 337

Parameter
Selects the command source of the PU operation mode (Pr. 551)
Any of the operation panel or PU connector can be specified as the command source in the PU
operation mode.
In the PU operation mode, set Pr. 551 to "2" when executing parameter write, start command or
frequency command during the RS485 communication with PU connector.
Pr. 551
9999
(initial value)
Tab. 6-43: Parameter 551 settings
The Modbus-RTU protocol cannot be used in the PU operation mode. When using the
Modbus-RTU protocol, set Pr. 551 ≠ "2".
When Pr. 551 = "9999", the priorities of the PU control source are: parameter unit (FR-PU04/
FR-PU07) > operation panel.
NOTES
When performing the RS485 communication with the PU connector when Pr. 551 = 9999,
PU mode command source does not automatically change to the PU connector.
When "2" (PU mode PU connector) is set in Pr. 551, the operation mode cannot be switched
to the network operation mode.
Changed setting value is made valid when powering on or resetting the inverter.
The Modbus-RTU protocol cannot be used in the PU operation mode. Select network opera-
tion mode (NET mode command source).
All of the operation mode indicator (
command source is not operation panel.
FR-D700 SC EC
Operation
Parameter Unit
Panel
2 —
4 PU
PU
Selection of operation mode and operation location
Command Source
RS485 Communication
PU PU
— NET
PU NET
) of the operation panel turns OFF when
Remarks
Switching to NET operation
mode disabled
6 - 187