Communication operation and setting
4.20.2 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 120, Pr. 123, Pr. 124, Pr. 549)
Used to perform required settings for RS-485 communication between the inverter and personal computer.
Use PU connector of the inverter for communication.
You can perform parameter setting, monitoring, etc. using Mitsubishi inverter protocol or Modbus-RTU protocol.
To make communication between the personal computer and inverter, initialization of the communication
specifications must be made to the inverter.
Data communication cannot be made if the initial settings are not made or there is any setting error.
PU communication speed
PU communication stop
PU communication parity
waiting time setting
PU communication CR/LF
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 179)
When "1" (Modbus-RTU protocol) is set in Pr. 549, the setting range within parenthesis is applied.
Always reset the inverter after making the initial settings of the parameters. After you have changed the
communication-related parameters, communication cannot be made until the inverter is reset.
Inverter station number specification
0 to 31 (0 to 247)
Set the inverter station numbers when two or more
inverters are connected to one personal computer.
The setting value X 100 equals the communication
48, 96, 192, 384
Example)19200bps if 192
Stop bit length
Without parity check
With odd parity check
With even parity check
Set the waiting time between data transmission to
0 to 150ms
the inverter and response.
Set with communication data.
Mitsubishi inverter (computer link operation) protocol