METHOD FOR TRANSMITTING REAL TIME PERIODIC AND NON-PERIODIC DATA IN CONTROL COMMUNICATION NETWORK OF DISTRIBUTED CONTROL SYSTEM

• Main Authors: LEE, JAE YEONG, KIM, HYEONG SEOK, KIM, GWANG HYEON, LEE, JAE MIN, KWON, UK HYEON, PARK, JE HYEONG, LEE, SEONG U, SHIN, CHANG HUN, YOON, MYEONG HYEON, JUN, TAE SU, KIM, YEONG SIN, LEE, BYEONG YUN, MUN, HONG JU, MUN, SANG YONG
• Format: Patent
• Language: English; Korean
• Published: 15.03.2001
• Edition: 7
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

PURPOSE: A method for transmitting real time periodic and non-periodic data in a control communication network of a distributed control system is provided to secure transmissions of the real time non-periodic data and transmissions of hard real time periodic data, by using one communication network, and to secure transmissions of soft real time periodic data. CONSTITUTION: A control communication network of a distributed control system sets up a THT(Token Hold Time) and a TTRT(Target Token Rotation Time), and assigns transmission priorities. The control communication network decides whether data transmissions are secured, and implements a communication network for transmitting real time non-periodic data and real time periodic data. If a TTRT1 is smaller than a deadline(d11) of the real time non-periodic data and is smaller than a minimum period(d12) among hard real time periodic data, the calculated TTRT1 is used. If the TTRT1 is bigger than the 'd11' of the real time non-periodic data or bigger than a minimum period(d12), the control communication network sets up a value calculated by subtracting a communication band relating to non-periodic non-real time data from the TTRT1, as a TTRT2.