The Kunlun Tongtai touch screen has a wide application in the industrial control field due to its high cost-performance ratio, strong script language support, mature supply chain channels, and flexible development model. The Siemens 200Smart PLC is widely used in China, with a large user base. The all-in-one machine integrates the functions of the Kunlun Tongtai touch screen and the 200Smart PLC, featuring a compact overall size and excellent cost-effectiveness.
The PLC configuration supports the following:
| Model | Input/Output | Analog | 485 | Ethernet |
| SR20 | 12DI,8DO (Relay) | None | 2 channels | 1 channel |
| SR20XP | 12DI,8DO (Relay) | 4AI,2AO | 2 channels | 1 channel |
| SR30 | 18DI,12DO (Relay) | None | 2 channels | 1 channel |
| SR30XP | 18DI,12DO (Relay) | 4AI,2AO | 2 channels | 1 channel |
There are various types of touch screens, which can generally be divided into three categories: those without Ethernet ports, those with Ethernet ports, and IoT-enabled ones. Touch screens without Ethernet ports need to communicate with the PLC via PPI, while those with Ethernet ports can communicate directly through the Ethernet port. Communication between the touch screen and PLC-PPI The internal connection of the all-in-one machine has connected the COM2 of the touch screen to the CM01 of the PLC, so the device configuration for the touch screen is as follows:
Add the CM01 module in the PLC project
CM01 corresponds to the PLC terminals A1 and B1, which have already been brought out on the all-in-one machine. If PPI communication is used, this function cannot be used in the PLC.Communication between the touch screen and PLC-EthernetUsers need to connect the Ethernet port of the touch screen to the Ethernet port of the PLC using an Ethernet cable. Add the device S7_Smart200_Ethernet.
Analog UsageExplanation of Analog Parameter Channels
Input Channels IW0,IW2 form a group, meaning IW0 and IW2 must connect to the same signal type; one channel cannot connect to current while the other connects to voltage; they must both be current or both be voltage (IW4 and IW6 follow the same principle).
Output channels can be set to output signal types individually.
Using analog requires adding a dedicated library file,
Library Usage Instructions
Note: This library will only execute once when the CPU transitions from STOP to RUN , so to make the modified parameters take effect, the CPU must be executed once from STOP to RUN operation.
The author has written a simple usage case based on the all-in-one machine, which can be referenced. Download the materials from the link below.
https://pan.quark.cn/s/63f8bbdd71c4Zhengzhou Kuntong Automation Technology Co., Ltd. has been deeply engaged in the automation industry for over ten years. It gathers high-quality domestic industrial control products and represents multiple brands, including Kunlun Tongtai touch screens, Oulu frequency converters, switch power supplies, signal isolators, and safety barriers. For product needs or technical issues, please contact Engineer Cui at wx18637130270.