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我厂丁苯橡胶后处理自动线系全套进口设备,其控制程序由继电逻辑组成.自1987年7月投运以来,由于继电器动作过于频繁,且触点联锁错综复杂,经常因继电器铁心断裂或触点烧坏而造成控制系统故障,使自动线全部停车。鉴于上述原因,我们利用停车大检修机会、拆除全部控制继电器,根据工艺条件,简化不必要的联锁,将控制程序重新组合,编制为PC控制逻辑,由CPU(中央处理机)输出控制中间继电器及电磁阀,从而提高了控制系统的可靠性,解决了因继电器损坏而影响椽胶生产的问题,
I plant styrene butadiene rubber automatic processing line imported a full set of imported equipment, the control program by the relay logic since commissioning in July 1987, due to the relay movements are too frequent, and the contact interlocking complex, often because of the relay core break or Contact burned and cause control system failure, so that all automatic parking line. In view of the above reasons, we take advantage of parking overhaul opportunities, remove all control relays, according to process conditions, simplify unnecessary interlocking, the control program re-combination of preparation for the PC control logic, the CPU (central processing unit) output control intermediate relay And solenoid valve, thereby improving the reliability of the control system to solve the relay damage caused by rafters glue production problems,