Mitsubishi Electric FR-E720-600 Instruction Manual page 197

(2) Selects the command source of the PU operation mode (Pr. 551)
Any of the operation panel, PU connector, or USB 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 RS-485 communication with PU communication.
NOTE
When performing the RS-485 communication with the PU connector when Pr. 551 = "9999", PU mode command
source does not automatically change to the PU connector. Change to the network operation mode to change the
command source.
When "2" (NET mode PU connector) is set in Pr. 550 and "2" (PU mode PU connector) is set in Pr, 551, PU operation
mode has priority. When the communication option is not fitted, therefore, 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 operation mode (NET mode
command source).
PU...PU operation mode, NET...network operation mode, —....without command source
Pr. 550 Pr. 551
Operation
Setting Setting
panel
2 —
3 —
4 PU
0
9999
PU ∗3
(initial
value)
2 —
3 —
2
4 PU
9999
PU ∗3
(initial
value)
2 —
3 —
9999
(initial
4 PU
value)
9999
PU ∗3
(initial
value)
∗1
The Modbus-RTU protocol cannot be used in the PU operation mode. When using the Modbus-RTU protocol, set Pr. 550 to "2".
∗2
When the communication option is not fitted, the operation mode cannot be switched to the network operation mode.
∗3 When Pr. 551 = "9999", the priorities of the PU control source is USB connector > parameter unit (FR-PU04/FR-PU07) > operation panel.
Selection of operation mode and operation location
Command Source
PU connector
USB
Parameter
connector
unit
— PU
PU —
— —
PU ∗3 PU ∗3
— PU
PU —
— —
PU ∗3 PU ∗3
— PU
—
PU
—
—
—
—
PU ∗3
PU ∗3
—
Communication
RS-485
option
communication
PU ∗1 NET ∗2
NET ∗2
—
NET ∗2
—
PU ∗1 NET ∗2
PU ∗1
—
NET —
NET —
NET NET
PU ∗1 NET ∗2
NET ∗2
—
NET —
NET ∗2
—
NET —
NET ∗2
—
NET —
Remarks
Switching to NET
operation mode disabled
Communication option
fitted
Communication option
not fitted
Communication option
fitted
4
Communication option
not fitted
Communication option
fitted
Communication option
not fitted
195