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Selection of operation mode and operation location
4
PARAMETERS
(2) Select 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 the RS-485 terminals to write parameters or send start and frequency commands in the PU
operation mode. Set Pr.551="3 or 9999" to use the USB connector to do those in the PU operation mode.
*1 The Modbus-RTU protocol cannot be used in the PU operation mode. When using the Modbus-RTU protocol, set Pr. 551 to "2".
*2 When the communication option is not fitted, the operation mode cannot be switched to Network operation mode.
*3 When Pr. 551 = "9999", the priorities of the PU command source is USB connector > PU connector.
CAUTION
⋅ The PU operation mode has a higher priority when Pr. 550 = "1" (NET mode RS-485 terminals) and Pr. 551 = "1" (PU mode RS-485
terminals). When the communication option is not fitted, therefore, the operation mode cannot be switched to Network operation
mode.
⋅ Changed setting value is valid when powering ON or resetting the inverter.
Pr. 550
Setting
Pr. 551
Setting
Command Source
Remarks
PU connector USB connector RS-485 terminals
Communication option
0
1 ××
PU operation mode
*1
NET operation mode *2
2 PU operation mode ××NET operation mode *2
3 × PU operation mode × NET operation mode *2
9999
(initial
value)
PU operation mode
*3
PU operation mode
*3
× NET operation mode *2
1
1 ××
PU operation mode
*1
×
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
*3
PU operation mode
*3
NET operation mode ×
9999
(initial
value)
1 ××PU operation mode
*1 NET operation mode *2
2 PU operation mode ×
× NET operation mode
*2
Communication option
fitted
NET operation mode ×
Communication option
not fitted
3 ×
PU operation mode
× NET operation mode *2
Communication option
fitted
NET operation mode ×
Communication option
not fitted
9999
(initial
value)
PU operation mode
*3
PU operation mode
*3
× NET operation mode *2
Communication option
fitted
NET operation mode ×
Communication option
not fitted