Mitsubishi FR-A800

(D) Operation command and frequency command
PARAMETERS
317
5
GROUP
D
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.
 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.
Pr.550
setting
Pr.551
setting
Command source
REMARKS
PU connector USB connector
RS-485
terminals
Communication
option
0
1

PU operation
mode

NET operation
mode

2 PU operation mode

NET operation
mode

3

PU operation mode

NET operation
mode

9999
(initial
value)
PU operation
mode

PU operation
mode


NET operation
mode

1
1

PU operation
mode


Switching to NET
operation mode disabled
2 PU operation mode

NET operation
mode

3

PU operation mode
NET operation
mode

9999
(initial
value)
PU operation
mode

PU operation
mode

NET operation
mode

9999
(initial
value)
1

PU operation
mode

NET operation
mode

2 PU operation mode


NET operation
mode

With communication
option
NET operation
mode

Without communication
option
3

PU operation mode

NET operation
mode

With communication
option
NET operation
mode

Without communication
option
9999
(initial
value)
PU operation
mode

PU operation
mode


NET operation
mode

With communication
option
NET operation
mode

Without communication
option