Selection Of The Command Source Of The Pu Operation Mode (Pr.551) - Mitsubishi Electric FR-F800 Instruction Manual

Selection of the command source of the PU operation mode (Pr.551)
• Any of the PU connector, RS-485 terminals, or USB connector can be specified as the command source in the PU
operation mode.
• Set Pr.551="1" to use communication connected to the RS-485 terminals to write parameters or execute start and
frequency commands in the PU operation mode. Set Pr.551="3" or "9999" to use the USB connector.
NOTE
• When Pr.550 ="1" (NET mode RS-485 terminals) and Pr.551 ="1" (PU mode RS-485 terminals), the PU operation mode has
a precedence. For this reason, if the communication option is not mounted, switching to the Network operation mode is not
longer possible.
• Changed setting values are enabled at power-ON or inverter reset.
Pr.550 Pr.551
setting setting
PU connector

1
2 PU operation mode
0

3
9999
PU operation
(initial
mode

value)

1
2 PU operation mode
1

3
9999
PU operation
(initial
mode

value)

1
2 PU operation mode
9999
(initial

value)
3
9999
PU operation
(initial
mode

value)

The Modbus-RTU protocol cannot be used in the PU operation mode. To use the Modbus-RTU protocol, set Pr.551="2".

If the communication option is not mounted, switching to the Network operation mode is not longer possible.

When Pr.551= "9999", the priority of the PU command source is USB connector > PU connector.
(D) Operation command and frequency command
Command source
RS-485
USB connector
terminals
PU operation

mode

 

PU operation mode
PU operation

mode

PU operation

mode

NET operation

mode
NET operation
PU operation mode
mode
PU operation NET operation
mode mode

PU operation

mode



NET operation
mode

PU operation mode
NET operation
mode

PU operation
mode
 NET operation
mode
Communication REMARKS
option
NET operation
mode

NET operation
mode

NET operation
mode

NET operation
mode

Switching to NET

operation mode disabled



NET operation
mode

NET operation With communication
mode option

Without communication

option
NET operation With communication
mode option

Without communication

option
NET operation With communication
mode option

Without communication

option
PARAMETERS
5
GROUP
D
211