In dealing with the communication between host computer and CNC system in FMS, EIA RS-232C serial interface and HDLC data link are used.
本文讨论用EIARS- 232c串行接口作为通讯线路，并选用国际链路层通讯协议HDLC进行FMS中主机与CNC系统的通讯。
The EIA Standard RS-422-A entitled "Electrical characteristics of Balanced Voltage Digital interface circuits" defines the characteristics of RS-422 interface circuits.
已授权的“平衡电压数字接口电路的电气特性”EIARS- 422 -A标准定义了RS - 422接口电路的特性。
The EIA Standard RS-422-A entitled "Electrical characteristics of Balanced Voltage Digital interface circuits" defines the characteristics of RS-422 interface circuits.
已授权的“平衡电压数字接口电路的电气特性”EIARS- 422 -A标准定义了RS - 422接口电路的特性。
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