基于PLC的电梯远程监控系统通信的实现

COMMUNICATION IMPLEMENTATION OF PLC-BASED ELEVATOR REMOTE MONITORING SYSTEM

以一个电梯远程监控系统为例,介绍了计算机与PLC的串行通信技术,计算机之间通过公用电话交换网的通信技术.计算机程序采用VC6.0编制,电梯运行状态数据采集的定时采用多媒体定时器来定时,增强了系统的实时性和可靠性.

With an example of elevator remote monitoring system,introduced the technology of serial communication between the computer and the PLC,and the technology of communication between computers through the PSTN. The application was developed by using VC6 0. The system used a multimedia timer to make the elevator running status data being collected on time. These methods enhanced the real time capability and the reliability of the system.