How does the touch screen communicate with the PLC?

Create Date: 2024-8-30 12:03:23|Source: Kunlun Tongs/MCGS

1. Connect the touch screen with the PLC

We know the communication between two pieces of hardware, whether wireless or wired.

The first step is to establish a connection.

The most common connection between PLC and touch screen is serial data cable connection.

The data cable can be purchased in a treasure, and there are special customized models for selection.

You can also weld it yourself.

How to exchange data between Weilun touch screen and Yonghong PLC.

The nine-pin side of the PLC communication port, 3 is the receiving data RxD, 2 is the sending data TxS, and 5 is the common ground GND.

On the touch screen communication port side, 6 is the transmit data TxD, 9 is the received data RxD, and 5 is the common ground GND.

Therefore, the pins 3 to 6, 2 to 9, 5 to 5 can be made into a data cable.

2. Add PLC

After connecting the two hardware, the PLC can be added to the touchscreen programming software.

Only when a PLC is added can the PLC register be read and written.

As shown in the figure below, Yonghong PLC is added to the Weilun touch screen programming software.

3. Realize data exchange

The hardware is connected, and the hardware is added to the touch screen software.

You can read and write the registers of the PLC in the touch screen element.

As shown in the figure below.

We've added a numerical display component. You can set the read/write address of the component to PLC.

And set which register to read and write the PLC, and then realize the exchange of data.
How does the touch screen communicate with the PLC?

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