I have a communication problem between the V10/V9 and Mitsubishi Q series CPU via Ethernet unit.

Please check the settings below:

Screen program settings:

[System Setting] → [Hardware Setting]

• Select [QnH (Q) series (Ethernet)] at [Device Select].
• [Device Select] → [Target Port no.] and select appropriate port to connect.

For the V10/V9's built-in LAN port, select [LAN].
(For the V10/V9 with an extra LAN port, [LAN2] option is also available.)
For connection with the V9's optional Ethernet unit (CUR-03), select [LAN unit].

• [PLC1 Property] → [Property] → [Target Setting] → [PLC Table] and set an IP address and a port number of the PLC.
    * Set the same IP address and Host station port No. as the PLC settings
       described in the section below.
• Select the PLC for connection from those registered on the PLC table at [PLC1 Properties] → [Target Settings] → [Connect To].
  (Valid only for 1 : 1 connection)

PLC settings:

Set [Network Parameter] of Mitsubishi's programming tool.

Network Parameter

Network type: Ethernet

Ethernet operations

IP address and other settings must be made here.

 Port No. setting

For an Ethernet unit, there are two different ways to set port numbers. With the [Automatic open UDP port] setting, communication is performed without discriminating between connecting units. With the [Open setting] setting, communication is performed only with units for which a connection has been established.

• Automatic open UDP port:
  The port number is changed using the ladder. The default setting is 5000 (DEC).
  
   
• Open setting:
  [Open setting] under [Network Parameter]
  
   

IP address of V10/V9 series unit

When specified in the screen program

Select the [Set IP] checkbox located at [System Setting] → [Ethernet Communication] → [Local Port Address] → [LAN] tab and set the IP address.
Leave the port number with the default value of "10000".
(This port number is used for reading and writing (EREAD/EWRITE) between MONITOUCH units and is unrelated to PLC communication.)

When specified on the V10/V9 series unit

Set the IP address on the [LAN Setting] menu in Local mode on the V10/V9 series unit and press the [Apply] switch at the lower right of the screen to confirm.
Leave the service port with the default value of "10000".
(This port number is used for reading and writing (EREAD/EWRITE) between MONITOUCH units and is unrelated to PLC communication.)

V10/V9 series unit   Local mode

• If a setting is changed in Local mode on the V10/V9 series unit, the changed setting takes priority.
  Check that the settings displayed on the [LAN Setting] menu and [Comm. Setting] menu in Local mode are configured as desired.
  To restore the screen program settings, press the [Restore Screen Data Settings] switch and confirm by pressing the [Apply] switch at the lower right of the screen.
  (On the [Comm. Setting] menu, press the [Reset All] switch after pressing the [Restore Screen Data Settings] switch.)
  
   
   
• A network test for the IP address of the PLC can be performed on the [Network Test] tab on the [I/O Check] menu in Local mode.
  For more information on network tests, click here.