Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 382

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 no
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
*3
mode
value)
1 ×
2 PU operation mode ×
1
3 ×
9999
PU operation
(initial
*3
mode
value)
1 ×
2 PU operation mode ×
9999
(initial
value)
3 ×
9999
PU operation
(initial
*3
mode
value)
*1 The MODBUS RTU protocol cannot be used in the PU operation mode. To use the MODBUS RTU protocol, set Pr.551 = "2".
*2 If the communication option is not mounted, switching to the NET operation mode is not possible.
*3 When Pr.551= "9999", the priority of the PU command source is USB connector > PU connector.
Command source
USB connector RS-485 terminals
PU operation
×
*1
mode
×
PU operation mode ×
PU operation
×
*3
mode
PU operation
×
*1
mode
NET operation
mode
NET operation
PU operation mode
mode
PU operation
NET operation
*3
mode
mode
PU operation
×
*1
mode
×
NET operation
mode
×
PU operation mode
NET operation
mode
×
PU operation
*3
mode
NET operation
mode
Communication
option
NET operation
*2
mode
NET operation
*2
mode
NET operation
*2
mode
NET operation
*2
mode
Switching to NET operation mode
×
disabled
×
×
×
NET operation
*2
mode
NET operation
With communication option
*2
mode
× Without communication option
NET operation
With communication option
*2
mode
× Without communication option
NET operation
With communication option
*2
mode
× Without communication option
5.9 (D) Operation command and frequency command
1
2
Remarks
3
4
5
6
7
8
9
10
381
5. PARAMETERS