Mitsubishi Electric FR-F740 EC Instruction Manual page 395

Parameter
Select the control source of the PU operation mode (Pr. 551)
Either the PU connector or inverter RS485 terminals can be specified as the source of control
in the PU operation mode.
In the PU operation mode, set Pr. 551 to "1" when executing parameter write, start command or
frequency setting through communication from the inverter RS485 terminals.
NOTE The PU operation mode has a higher priority when Pr. 550 = 1 (NET mode RS485 terminals)
and Pr. 551 = 1 (PU mode RS485 terminals). When the communication option is not fitted,
therefore, the operation mode cannot be switched to network operation mode.
Pr. 550
0
1
9999
(initial
value)
Tab. 6-50:
The Modbus-RTU protocol cannot be used in the PU operation mode. When using the
Modbus-RTU protocol, set Pr. 551 to "2".
When the communication option is not fitted, the operation mode cannot be switched to
network operation mode.
FR-F700 EC
Operation Mode of Control Source
Pr. 551
PU connector
1 —
2
PU
(initial
operation mode
value)
1 —
2
PU
(initial
operation mode
value)
1 —
2
PU
(initial
operation mode
value)
Parameter 550 and 551 settings
Selection of operation mode and operation location
Communication
RS485 terminals
option
PU NET
operation mode operation mode
NET
—
operation mode
PU
operation mode
NET
operation mode
PU NET
operation mode operation mode
NET
—
operation mode
NET
operation mode
Remarks
Switching to NET
—
operation mode disabled
—
Communication option
fitted
Communication option not
—
fitted
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