A synchronous motor Angle encoder with low cost, high practicality and RS-232 serial output interface based on PIC16F874 MCU is introduced in the paper.
本文基于PIC 16f874单片机，介绍了一种低成本、实用性强并提供RS - 232串口输出的高精度同步机角度编码器。
Serial interface supports three communication criterions and can easily embeds itself to network nodes being composed of RS-485, RS-232 and circuit.
串行口支持3种通讯规范，可以很方便地嵌入到使用RS-485通讯接口、RS-232通讯接口和电流环通讯接口的网络节点中；
The system is composed of GPRS network technology, serial interface RS-232/RS-485 transmission protocol, network communication protocol and anti-disturbance circuit design.
本系统涉及GPRS网络技术、串口RS-232/RS-485传输协议、网络通讯协议、系统抗干扰电路设计等相关技术。
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