3.A typewriter character indicating that no action whatsoever be taken. Usually, in teletypewriter code, a charactercode consisting of holes punched in every hole position is an ignore character, this convention makes possible erasing any previously punched character.
5.Based on the power industry standards (DL-511-93), the automatic classified encoding for power station fittings and automatic transformation between charactercode and bar code are implemented.
8.The code 39 of bar code is used in automatic system of library at present. The article introduces the cod principle and character of the code 39,the design method of printing and brief programmed code of visual C++.
9.the last character is also 14H. When monitor PC received alarm information from digital receiver, it also needs to send a character which ASCII code is 06H back.
