现代炼油、化工、石油化工、化纤、发电等生产装置,都日趋大型化、连续化、联合化并向高速、高温、高压方向发展。为了确保这些生产装置安全生产而设置的报警、联锁系统的数量也愈来愈多,其复杂程度也愈来愈繁杂多样。例如:大型化肥生产装置 Modern refining, chemical, petrochemical, chemical fiber, power generation and other production facilities, are increasingly large-scale, continuous, integrated and to high-speed, high temperature, high pressure direction. In order to ensure the safe production of these production facilities and set the alarm, the number of interlocking systems are also more and more complex and more complex and diverse. For example: large-scale fertilizer production plant