第六章 PLC设计 ⒍1 PLC的选择 PLC控制系统输入信号有20个,均为开关量,其中手动开关有两个,选择开关有3个延时,开关有2个,接近开关有7个,压力辅助1个。 PLC控制系统的输出信号有14个,其中12驱动中间继电器KA1~KA10,2个驱动延时继电器。 根据输入和输出信号个数,PLC可选三菱FX1N-40MR-001,其输入点数有24,输出点数有16,满足要求而且留有一定裕量。 ⒍2现场器件与PLC内部等效继电器地址编号对照表 输入信号 | 名称 | 功能 | I/O编号 | SA2 | 点动/半点动 | X0 | SA3 | 脱模方式 | X1 | SA4 | 压制方式 | X2 | SB4 | 静止 | X3 | SB5 | 慢下 | X4 | SB6 | 回程 | X5 | SB7 | 顶出 | X6 | SB8 | 退回 | X7 | SB9 | 工作1 | X10 | SB10 | 工作2 | X11 | KT1 | 保压延时 | X12 | KT2 | 取坯延时 | X13 | SP1 | 主缸压力 | X14 | SQ1 | 滑块下限 | X15 | SQ2 | 滑块快转慢 | X16 | SQ3 | 滑块浮动 | X17 | SQ4 | 滑块下限 | X20 | SQ5 | 顶缸上限 | X21 | SQ6 | 顶缸下限 | X22 | | 光电保护 | X23 | 输出信号 | KA1 | | Y0 | KA2 | | Y1 | KA3 | | Y2 | KA4 | | Y3 | KA5 | | Y4 | KA6 | | Y5 | KA7 | | Y6 | KA8 | | Y7 | KA9 | | Y10 | KA10 | | Y11 | KA11 | | Y12 | KA12 | | Y13 | KT1 | | Y14 | KT2 | | Y15 | ⒍3工作流程与动作顺序 工作方式 | 序号 | 动作名称 | 液压阀(YA) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 点动 | 1 | 滑块快下 | + | | | + | + | | | | | | | | 2 | 滑块回程 | + | + | | | | + | | | + | | | | 3 | 顶缸顶出 | + | | | | | | | + | | | + | | 4 | 顶缸退回 | + | | | | | | + | | | | | | 半自动 | 浮动压制 | A一般脱模 | 1 | 滑块快下 | + | | + | | + | | | | | | | | 2 | 滑块慢下预压 | + | | | + | + | | | | | | | | 3 | 浮动压制 | + | | | | + | | | | | + | | + | 4 | 保压 | | | | | | | | | | | | | 5 | 泄压 | | + | | | | | | | + | | | | 6 | 滑块回程 | + | | | | | + | | | + | | | | 7 | 顶缸退回 | + | | | | | | + | | | | | | 8 | 手动取坯 | | | | | | | | | | | | | 9 | 顶缸顶出 | + | | | | | | | + | | | + | | 10 | 手动加料 | | | | | | | | | | | | | 11 | 转下一循环 | | | | | | | | | | | | | B保护脱模 | 1 | 滑块快下 | + | | + | | + | | | | | | | | 2 | 滑块慢下预压 | + | | | + | + | | | | | | | | 3 | 浮动压制 | + | | | | | | | | | + | | + | 4 | 保压 | | | | | | | | | | | | | 5 | 泄压 | | + | | | | | | | + | | | | 6 | 顶缸退回 | + | | | | | | + | | | | | | 7 | 滑块回程 | + | | | | | + | | | + | | | | 8 | 手动取坯 | | | | | | | | | | | | | 9 | 顶缸顶出 | + | | | | | | | + | | | + | | 10 | 手动加料 | | | | | | | | | | | | | 11 | 转下一循环 | | | | | | | | | | | | | 单向压制 | C一般脱模 | 1 | 滑块快下 | + | | + | | + | | | | | | | | 2 | 滑块慢下压制 | + | | | + | + | | | | | | | | 3 | 保压 | | | | | | | | | | | | | 4 | 泄压 | | + | | | | | | | + | | | | 5 | 滑块回程 | + | | | | | + | | | + | | | | 6 | 顶缸顶出 | + | | | | | | | + | | | + | | 7 | 手动取坯 | | | | | | | | | | | | | 8 | 顶缸退回 | + | | | | | | + | | | | | | 9 | 手动加料 | | | | | | | | | | | | | 10 | 转下一循环 | | | | | | | | | | | | | D保护脱模 | 1 | 滑块快下 | + | | + | | + | | | | | | | | 2 | 滑块慢下压制 | + | | | + | + | | | | | | | | 3 | 保压 | | | | | | | | | | | | | 4 | 泄压 | | + | | | | | | | + | | | | 5 | 顶缸顶出 | + | | | | | | | + | + | + | | | 6 | 滑块回程 | + | | | | | + | | | + | | | | 7 | 手动取坯 | | | | | | | | | | | | | 8 | 顶缸退回 | + | | | | | | + | | | | | | 9 | 手动加料 | | | | | | | | | | | | | 10 | 转下一循环 | | | | | | | | | | | | | 其它 | 1 | 静止 | | | | | | | | | | | | | 2 | 紧急回程 | + | | | | | + | | | + | | | | 3 | 紧急停止 | | | | | | | | | | | | | |