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P (50H) (RAM
*1
write)
This command is used to rewrite data into the parameter specified using a communication number. It
writes data into the RAM only. It cannot be used to write data into any read-only parameters. Each
time an attempt to write data is made the inverter checks whether the data falls within the specified
range. If this check reveals that the data falls outside the range, the inverter will reject it and return an
error code.
- Ex.: Entering the emergency stop command (communication number: FA00) from the computer
<ASCII mode>
Computer → Inverter Inverter
→ Computer
(PFA009000)CR (PFA009000)CR …Command priority, emergency stop
command
<Binary mode>
Computer →
Inverter Inverter → Computer
2F 50 FA 00 90 00 09 2F 50 FA 00 90 00 09
R (52H) (Data read)
This command is used to read the setting of the parameter specified using a communication number.
(When multiple inverters are operated in binary mode via RS485 converter connected to a two-wire
line, the execution of the R command could result in a communication error. To avoid this, use the G
command in binary mode when inverters are connected to a two-wire line.)
- Ex.: Monitoring the electric current (communication number: FE03)
<ASCII mode>
Computer →
Inverter Inverter → Computer
(RFE03)CR (RFE03077B)CR …Current: 1915 / 100 = 19.15%
<Binary mode>
Computer →
Inverter Inverter → Computer
2F 52 FE 03 82 2F 52 FE 03 07 7B 04
Notice
When multiple inverters are operated in binary mode via RS485 converter connected to a two-wire line, use
the G command to read data.
G (47H) (Data read)
This command is used to read the parameter data specified using a communication number.
To send this command to an inverter with two-wire type RS485 network, 2bytes of dummy data are
needed. This command is available only in binary mode.
- Ex.: Monitoring the electric current (communication number: FE03)
Computer → Inverter Inverter
→ Computer
2F 47 FE 03 00 00 77 2F 47 FE 03 07 7B F9
* In this example, the data 00H sent from the computer to the inverter is dummy data.