PLC编程实例PLC经典练习第八章二.doc

PLC编程实例PLC经典练习第八章二I0.2M0.2I1.0M0.2M0.1升降极限到达信号。M1.0 I0.1I0.0M0.0 系统总电源合闸。M0.1升起。M0.1 I1.0M0.2I1.1M0.0下降。M0.2 I1.1M0.1M0.0M0.6M0.5I1.4左右极限到达信号。M1.2 I1.5I0.6M0.6I0.5M0.5左行。I1.4M0.6M0.0M0.4M0.3I0.4M0.4I0.3M0.3前进。M0.3 I1.2M0.4M0.0后退。M0.4 I1.3M0.3M0.0I1.2前进后退极限到达信号。M1.1 I1.3M0.5 右行。M0.6 I1.5M0.5M0.0Q0.0Q0.1M0.7 Q0.2M1.0M1.1报警指示灯。Q0.6 M1.2M0.63#电机反转。Q0.5 M0.21#电机反转。Q0.1 M0.53#电机正转。Q0.4 M0.4M0.32#电机正转。2#电机反转。Q0.2 Q0.3 M0.11#电机正转。Q0.0 Q0.3M0.7Q0.4Q0.7 Q0.5警示铃。图8-6 桥式起重机控制的梯形图1#给料器1#皮带2#给料器粉碎机2#皮带3#皮带1#皮带10秒20秒10秒10秒10秒10秒10秒10秒10秒20秒30秒10秒停车顺序启动顺序图8-7 供料系统启停控制工艺要求CPU输入单元输出单元启动I0.0停止I0.11#给料器允许I0.21#皮带允许I0.3粉碎机允许I0.42#给料器允许I0.52#皮带允许I0.6升降机允许I0.73#皮带允许I1.02#皮带Q0.4粉碎机Q0.22#给料器Q0.31#皮带Q0.11#给料器Q0.0故障指示Q0.7升降机Q0.53#皮带Q0.6图8-8 供料系统控制PLC配置图M0.1M1.0M1.0I0.1停止信号。C1R 复位计数器1。T1M0.0M0.0M0.0M0.1I0.0启动信号。T110S 脉冲发生器1。T1C1CU 启动计数器1。M0.7M0.7C2R 复位计数器2。T2M1.0T210S 脉冲发生器2。T2C2CU 启动计数器2。启动信号1。L 1L C1= = IM2.0启动信号2。L 2L C1= = IM2.1启动信号3。L 3L C1= = IM2.2启动信号4。L 4L C1= = IM2.3启动信号5。L 5L C1= = IM2.4启动信号6。L 6L C1= = IM2.5停止信号1。L 1L C2= = IM1.1停止信号2。L 3L C2= = IM1.2停止信号3。L 4L C2= = IM1.3停止信号4。L 6L C2= = IM1.4停止信号5。L 9L C2= = IM1.5M2.2M0.4M1.3M0.42#给料器启动信号。M2.1M0.5M1.4M0.52#皮带启动信号。M2.0M0.6M1.5M0.6升降机启动信号。I0.0M0.7M1.6M0.73#皮带启动信号。停止信号6。L 10L C2= = IM1.6M0.5I0.6Q0.4 2#皮带动作。M0.4I0.5Q0.3 2#给料器动作。M0.3M0.2I0.3Q0.1 1#皮带动作。M2.5M0.1I0.1M0.11#给料器启动信号。M2.4M0.2M1.1M0.21#皮带启动信号。M2.3M0.3M1.2M0.3粉碎机启动信号。M0.1I0.2Q0.0 1#给料器动作。I0.4Q0.2 粉碎机动作。M0.6M0.3M0.1M0.6M0.5M0.4M0.7I1.0Q0.6 3#皮带动作。M0.7M0.2I0.1Q0.7故障报警信号。I0.0M1.7M1.7已启动信号。M0.6I0.7Q0.5 升降机动作。图8-9 供料系统控制梯形图低温I2.5高温I2.4温度上限I2.3液位下限I2.2低液位I2.1液位上限I2.0温度报警Q1.2电加热器控制Q1.1报警铃Q1.4液位报警Q1.3冷却泵控制Q1.01#溢流阀控制Q0.5CPU输入单元1输出单元1#液压泵启I0.04#溢流阀控制Q0.74#液压泵控制Q0.41#液压泵控制Q0.01#液压泵停I0.14#液压泵启I0.64#液压泵停I0.7冷却泵启I1.0冷却泵停I1.11#液压泵允许I1.22#液压泵允许I1.5冷却泵允许I1.6输入单元2电加热器允许I1.7温度下限I2.6图8-10液压站系统控制PLC配置图&液压泵允许启动停止液位下极限信号液压泵运转信号温度上极限信号温度下极限信号图8-11 液压泵的逻辑控制示意图与冷却泵允许启动停止冷却泵运转信号高温信号或图8-12 冷却泵的逻辑控制示意图Q0.1T21S Q0.5T22#溢流阀打开。延时闭合。2#液压泵启动。I1.3Q0.1M0.1M0.1I0.3I0.22#液压泵启动信号。M0.1I2.2I2.3I2.6Q0.0T11S 1#液压泵启动。I1.2Q0.4T11#溢流阀打开。Q0.0M0.0M0.0I0.1I0.01#液压泵启动信号。M0.0I2.2I2.3I2.6延时闭合。M0.4I1.1I1.0冷却泵启动信号。M0.4Q0.3T41S Q0.7T44#溢流阀打开。延时闭合。4#液压泵启动。I1.5Q0.3M0.3M0.3I0.7I0.64#液压泵启动信号。M0.3I2.2I2.3I2.6Q0.3T31S 3#液压泵启动。I1.4Q0.6T31#溢流阀打开。Q0.3M0.2M0.2I0.5I0.43#液压泵启动信号。M0.2I2.2I2.3I2.6延时闭合。温度报警信号。I2.6M0.6I2.3T5温度故障信号。I2.5M0.5I2.4M1.1T5T51S I2.4I2.5电加热器启动信号。Q1.1M0.2M0.3I2.4M0.1M1.0M0.0I1.6冷却泵启动。M1.0Q1.