Research on the relationship between small computers and production stations

RS-232-C provides 25 signals in the standard for different purposes, but in actual use, most signals are not used. Generally, more than 10 signals are used for communication between computers and peripherals. The primary task of the interface line is to connect two different types of lines together. And call it asynchronous communication. Asynchronous communication is divided into serial and parallel. This type of asynchronous digital data is in bytes. One byte of data is sent from one side at a time, and the other side receives the byte of data. Bytes are transmitted asynchronously, so there is no clock signal indicating the start and end points of the data. Therefore, the start bit and the stop bit are included in the data byte. The start bit is usually placed at the beginning of each data, and the data line containing the byte data remains high. When the data is output, the line goes low. Therefore the start bit is a low level data. After the start bit is byte data, at the end of the byte data, the data line goes high again and remains two bits (Bit). The two bits are stop bits and are high. Thus, a data frame format consists of 11-bit binary numbers, of which 8 bits are data, 1 bit is the start bit, and 2 bits are the stop bits. A data transfer error may occur during data transfer, so a 1-bit parity bit can be added to the data byte. The parity bit is placed before the stop bit. The odd parity is to count the number of 1 in the transmitted data byte. When the number of 1 is odd, the odd parity bit is 0, and the odd parity guarantees the number of 1 in the data byte. It is an odd number. Even parity is the same as odd parity.

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We have supplied our Lighting poles to Australia, Columbia, England, Kuwait, Iraq, Philippines, Pakistan and etc.

Our Lighting poles are made from quality sheet through bending, forming, automatic welding and hot galvanization. We can reach one-run machining length of 14m and can bend sheet of thickness up to 45mm. We adopt advanced welding procedures, automatically weld main joints and reach rank-II welding quality.