METHOD FOR DATA TRANSMISSION CONTROL

PURPOSE:To simply if the equipment by applying a specific transmission procedure. CONSTITUTION:After an inquiry signal is sent in the transmission sequence, an affirmative acknowledgement signal (ACK) is awaited and when the signal ACK is received, the process is proceeded to the information transmission, but when no ACK is received, the transmission operation is finished. In the information transmission, a signal (STX) at the start of text, transmission information (TEXT), a text end signal (ETX) and an error detection character (BCC) are sent in this order and the signal ACK is awaited as the reply awaiting after the transmission. When the signal ACK is received, a communication end signal is sent and when no ACK is received, the transmission operation is finished. When no ACK is received, The signal ACK is sent to the reception of the inquiry signal in the A reception sequence to await the signal STX, and when the signal TEXT is received and when no STX is received, the reception operation is finished. When the signal STX is received, the signals TEXT, ETX, BCC are received succeedingly, and when they are received correctly, the signal ACK is sent and when not correctly received, the reception is finished.