可擦除、可编程只读存贮器(EPROM)是一种半导体存贮器件,它具有集成度高、价格低廉、便于编程及能多次使用等优点。在顺序控制器中,采用这种器件取代传统的步进式和时序式顺序控制器中的矩阵板来进行工艺信息的记忆存贮,无疑对顺序控制器的结构和性能均有明显的改进。 Erasable and Programmable Read Only Memory (EPROM) is a semiconductor memory device that has the advantages of high integration, low cost, ease of programming, and multiple use. In the sequence controller, adopting this kind of device to replace the traditional step-by-step and sequence-based sequence controller in the matrix board for process information memory storage, no doubt the structure and performance of the sequence controller are significantly improved.