I have a communication problem between the V10/V9 and Mitsubishi QnU series CPU built-in Ethernet.

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  • No : 4594
  • Displayed Date : 2025/12/01 13:47
  • Updated DTM : 2025/12/08 18:49
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I have a communication problem between the V10/V9 and Mitsubishi QnU series CPU built-in Ethernet.

I have a communication problem between the V10/V9 and Mitsubishi QnU series CPU built-in Ethernet.

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Answer

Please check the settings below:

 

Screen program settings:

[System Setting] → [Hardware Setting]

 

  • Select [Model: QnU series (Built-in 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 either [Built-in LAN(UDP)] or [Built-in LAN(TCP)].
(For the V10/V9 with an extra LAN port, [LAN2(UDP)] and [LAN2(TCP)] options are also available.
 *Protocol to use for the PLC must be correctly selected as will be described later.

For connection with the V10/V9's optional Ethernet unit (CUR-03), select [LAN unit].
  * Only UDP/IP protocol is supported.

 

  • [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:

For a CPU's built-in LAN port:

Set [PC parameter] of Mitsubishi's programming tool.

 

 

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.

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