User guide

M-4662
2-30
2.8 Reading/Writing the MV Data from Another Device
via Modbus
The MV is a Modbus server.
For Modbus specifications, see section 7.3.
ConguringtheModbusServer
You can configure the Modbus server so that another device will be able to read or write
the MV data via Modbus.
◊ Press MENU and then select Menu tab > Basicsettingmode > Menu tab >
Communication(Ethernet) > Server
• Modbus
Set the Modbus parameter under Server to Use. If you select Not (not use), you will
not be able to use the Modbus server function.
PortNumber
The default value is 502. To change the value:
◊ Press MENU and then select Menu tab > Basicsettingmode > Environment tab >
Communication > Serviceport
For the selectable range, see section 7.1.
ReadingorWritingtheMVDatafromAnotherDevice
Another device (client device) sends commands to the MV to read data from the MV or
write data to the MV.
For the function codes that the MV supports and the MV registers that the client device
can access, see “Modbus Server Function” in section 7.3.