Ward call system is a communication equipment used frequently in ward.

The paper mainly introduces Malaysia communication equipment market access rules.

On the basis of introducing the architecture of device communication subsystem based on Windows CE.

Implementation of data communication action and function of LF level 2 computer system;

Realization of Data Communication between PC and PLC in Fault Online Monitor System under DELPHI Platform;

A design for data communication of multiple-rate timeshare Watt-hour meter;

Communication Between GEPAC71 and VersaMax_I/O;

According to the characteristics of wide coverage, large number of users and complicated situation of power consuming in Shengli Oil Field, a set of remote metering systems is set up with the help of data communication service provided by the mobile communications company and GPRS data collecting terminal station.

In order to accomplish the control on-line in systems, it s very important for the reliable data communication between computer and subsidiary systems, It s introduced that way of network control system with ARLNC429 and CAN bus in the text.

Prospects of data transmission of the DCS systems are discussed.

It is introduced how to realize method of data transmission between Siemens AC-DC all digital speed control device and Siemens PLC, and make all digital speed control device can sent out instruction through computer control system, finish to driver system control, finally realize central control of many drive control system.