PCC和HITECH触摸屏数据交换的研究

The Research on Data Exchange between PCC and HITECH （HMI）

触摸屏通常可以与多种型号PLC通讯，用户在触摸屏软件中可以直接针对PLC的变量地址进行读写编程，但是触摸屏和PCC的通讯不像与PLC那样简单。针对此问题，该文介绍了如何通过Modbus通讯协议使HITECH触摸屏能监视和修改PCC的变量数据。该解决方案的提出不但解决了PCC和HITECH触摸屏配套时的数据通讯问题，同时也为PCC的用户提供了一种设计方法和编程思路。

Usually, touch screen can communicate with PLC of many types. The user can directly program addresses of variables of PLC by reading and writing in the touch screen software. But the communication between touch screen and PCC is not so simple as it with PLC. Aiming at the problem,the paper introduces that how to use Modbus communication protocol to enable HITECH HMI to monitor and modify the variable data of PCC. The scheme not only achieves the data exchange between PCC and HITECH HMI, but also provides a new design method and programming idea for PCC users.