The penetration function of the touch screen of Weiluntong

Create Date: 2024-8-30 12:03:23|Source: Weinview

Sometimes we need to monitor and change the program of PLC equipment, and when it is inconvenient to connect to PLC or there is no communication line, we can choose to achieve it through the penetration function of the touch screen.

The traversal communication function consists of the following two modes:

Ethernet

Before using the [Ethernet] pass-through function, you need to install the virtual serial port driver, and you can change the virtual serial port number after the installation is complete.

Once the virtual serial port driver is installed, simply follow the steps below to use the traversal communication feature.

1. Set the HMI IP address of the connected device.

2. Specify the HMI communication port number, which can also be adjusted in [System Parameter Settings\ HMI Properties].

3. Specify the penetration port number, which can also be adjusted in [System Parameter Settings \ HMI Properties].

4. Specify the serial port number of the HMI-connected device.

5. After all the settings are completed, you need to press the [Apply] button for all properties to take effect.

6. When executing applications on your PC, the serial port number used should point to the virtual serial port number. For example, if the virtual serial port is COM 3, COM 3 must be selected in the [PC side I/F Serial setting] window.

  002.JPG

7. Once the above settings are complete, the HMI will automatically switch to pass-through mode when the user executes the application on the PC, and the application can be treated as if it were directly using the virtual serial port to control the device. When the application is closed, the HMI also automatically switches off the pass-through mode.

serial port

Before using the [Serial Port] traversal communication function, you need to set the properties of the [Data Source Serial Port] and [Data Destination Serial Port] two serial ports correctly.

Click on each section below to see the detailed description.

  001.JPG

Serial port traversal communication can also be enabled via the associated system registers.

LW-9901 (16bit) : Penetrates serial port of communication data source (1-3 : COM 1-COM 3)

LW-9902 (16bit) : Penetrates the serial port of the communication data target (1-3 : COM 1-COM 3)

LW-9903 (16bit) : Pass-through Control (0 : Normal, 1 : Pause, 2 : Stop communication between HMI and device when traversal function is performed)

When the data in the LW-9901 and LW-9902 meet the following criteria, the HMI will automatically activate the traversal communication function.

- The data in LW-9901 and LW-9902 must be 1 - 3 (1 - 3 means COM 1 - COM 3, respectively).

- The data in LW-9901 and LW-9902 are not identical.

If you need to change the communication parameters of each serial port, you only need to change the data in the system registers corresponding to each parameter and set ON to LB-9030 - LB-9032.

Note:

■ To disable the serial port traversal communication function of the HMI, simply change the data in the LW-9901 and LW-9902 to 0.

■ Due to the limited communication speed of the serial port, the LW-9903 can be set to 2 to suspend the communication between the HMI and the device, so as to speed up the upload/download of the device program.
The penetration function of the touch screen of Weiluntong

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