摘要:某石化厂SC-05型石蜡成型机是明注液体石蜡、两面水冷成型、人工卸成型蜡、液压加紧和松开式的成型机。其控制柜中应用9只中间继电器和3只时间继电器,联锁及接线很复杂,容易出现故障,维护比较困难。自带编程器的LOGO!超小型可编程序控制器,包含时间继电器、脉冲继电器、
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