ABL8RED24400

详细内容：ABL8RED24400 工作原理 编辑 当PLC投入运行后，其工作过程一般分为三个阶段，即输入采样、用户程序执行和输出刷新三个阶段。完成上述三个阶段称作一个扫描周期。在整个运行期间，PLC的CPU以一定的扫描速度重复执行上述三个阶段。 输入采样 在输入采样阶段，PLC以扫描方式依次地读入所有输入状态和数据，并将它们存入I/O映象区中的相应得单元内。输入采样结束后，转入用户程序执行和输出刷新阶段。在这两个阶段中，即使输入状态和数据发生变化，I/O映象区中的相应单元的状态和数据也不会改变。因此，如果输入是脉冲信号，则该脉冲信号的宽度必须大于一个扫描周期，才能保证在任何情况下，该输入均能被读入。 用户程序执行 在用户程序执行阶段，PLC总是按由上而下的顺序依次地扫描用户程序(梯形图)。在扫描每一条梯形图时，又总是先扫描梯形图左边的由各触点构成的控制线路，并按先左后右、先上后下的顺序对由触点构成的控制线路进行逻辑运算，然后根据逻辑运算的结果，刷新该逻辑线圈在系统RAM存储区中对应位的状态；或者刷新该输出线圈在I/O映象区中对应位的状态；或者确定是否要执行该梯形图所规定的特殊功能指令。 即，在用户程序执行过程中，只有输入点在I/O映象区内的状态和数据不会发生变化，而其他输出点和软设备在I/O映象区或系统RAM存储区内的状态和数据都有可能发生变化，而且排在上面的梯形图，其程序执行结果会对排在下面的凡是用到这些线圈或数据的梯形图起作用；相反，排在下面的梯形图，其被刷新的逻辑线圈的状态或数据只能到下一个扫描周期才能对排在其上面的程序起作用。 输出刷新 当扫描用户程序结束后，PLC就进入输出刷新阶段。在此期间，CPU按照I/O映象区内对应的状态和数据刷新所有的输出锁存电路，再经输出电路驱动相应的外设。这时，才是PLC的真正输出。 同样的若干条梯形图，其排列次序不同，执行的结果也不同。另外，采用扫描用户程序的运行结果与继电器控制装置的硬逻辑并行运行的结果有所区别。当然，如果扫描周期所占用的时间对整个运行来说可以忽略，那么二者之间就没有什么区别了。 保养 编辑 设备定期测试、调整 （1） 每半年或季度检查PLC柜中接线端子的连接情况，若发现松动的地方及时重新坚固连接； （2） 对柜中给主机供电的电源每月重新测量工作电压； 设备定期清扫 （1） 每六个月或季度对PLC进行清扫，切断给PLC供电的电源把电源机架、CPU主板及输入/输出板依次拆下，进行吹扫、清扫后再依次原位安装好，将全部连接恢复后送电并启动PLC主机。认真清扫PLC箱内卫生； （2） 每三个月更换电源机架下方过滤网； 检修前准备 （1） 检修前准备好工具； （2） 为保障元件的功能不出故障及模板不损坏，必须用保护装置及认真作防静电准备工作； （3） 检修前与调度和操作工联系好，需挂检修牌处挂好检修牌； 设备拆装顺序及方法 （1） 停机检修，必须两个人以上监护操作； （2） 把CPU前面板上的方式选择开关从“运行”转到“停”位置； （3） 关闭PLC供电的总电源，然后关闭其它给模坂供电的电源； （4） 把与电源架相连的电源线记清线号及连接位置后拆下，然后拆下电源机架与机柜相连的螺丝，电源机架就可拆下； （5） CPU主板及I/0板可在旋转模板下方的螺丝后拆下； （6） 安装时以相反顺序进行； 检修工艺及技术要求 （1） 测量电压时，要用数字电压表或精度为1%的万能表测量 （2）电源机架，CPU主板都只能在主电源切断时取下； （3） 在RAM模块从CPU取下或插入CPU之前，要断开PC的电源，这样才能保证数据不混乱； （4） 在取下RAM模块之前，检查一下模块电池是否正常工作，如果电池故障灯亮时取下模块RAM内容将丢失； （5） 输入/输出板取下前也应先关掉总电源，但如果生产需要时I/0板也可在可编程控制器运行时取下，但CPU板上的QVZ（超时）灯亮； （6） 拨插模板时，要格外小心，轻拿轻放，并运离产生静电的物品； （7） 更换元件不得带电操作； （8） 检修后模板安装一定要安插到位 RELIANCE ELECTRIC 600434-37V 60043437V RELIANCE ELECTRIC 600434-33V 60043433V Reliance Electric 6 Slot Rack 45C913 Reliance Electric 5mA - 50mA Inst. Interface 705354 79A Reliance Electric 57C492 Battery Backup Unit PLC B/M 803623-R M/N 803623R RELIANCE ELECTRIC 57C-427 57C427 Reliance Electric 57C422B Reliance Electric 57C420 57420 32-Channel 5-24VDC Output Module J-3633 Reliance Electric 57C419 57419-1B 32-Channel Input Module 5-24 VDC J-3632-2 Reliance Electric 57C419 57419-1B 32-Channel 5-24VDC Input Module J-3632 RELIANCE ELECTRIC 57C419 5-24V DC INPUT MODULE 57419-1B S-67107-1A 57419 Reliance Electric 57C411 Resolver Input Module 0-57411-2J - Refurbished RELIANCE ELECTRIC 57C411 RESOLVER INPUT MODULE Reliance Electric 57C409-H 2-Channel Analog Input Module Reliance Electric 57C404C Network Communications Automax Network Module 0574043A Reliance Electric 57C404B 57C-404B Module 57404-2F 0-57404 - Refurbished Reliance Electric 57C404A 57C404 57404-2 Network Communications PLC AutoMax Reliance Electric 57C404 Communication Module Reliance Electric 57C403-G High Output Module, 16-Channel, 115VAC Reliance Electric 57C402 Output Module Reliance Electric 57C380 Passive Tap RELIANCE ELECTRIC 57C370 16 DIGIT CONNECTOR * IN A BOX* RELIANCE ELECTRIC 57552-4 Reliance Electric 57412 Field Regulator Module Reliance Electric 57411-2 Resolver Input Module Reliance Electric 57409 Isolated Control Reliance Electric 57407-4J DCS Processor - Parts Only Reliance Electric 57407-4J CPU Module Reliance Electric 57407-4J 0574074J DCS Processor 57407-4 - RELIANCE ELECTRIC 57407-4J * * RELIANCE ELECTRIC 57405-E 57405 DRIVE ANALOG I/O MODULE Reliance Electric 57405-E 0- Analog I/O Drive Module O- - RELIANCE ELECTRIC 57403-E B/M DISTRIBUTION CONTROL SYSTEM Reliance Electric 57403 High Output Module RELIANCE ELECTRIC 57403 115 V AC HIGH OUTPUT 0-57403-E MODULE RELIANCE ELECTRIC 56313-1 INTERFACE PROCESS CONTROL Reliance Electric 5614 Reeves Vari-Speed Motor Pulley Mount Base Adjustable RELIANCE ELECTRIC 5533216 FUSE FERRAZ PROTISTOR F300178 STOCK*K590 RELIANCE ELECTRIC 5-24VDC DC OUTPUT MODULE 57420 RELIANCE ELECTRIC 5-24VDC 32 CHANNEL INPUT 57419-1 RELIANCE ELECTRIC 5-24V DC OUTPUT MODULE PLC 57420 57-420 S-67106A RELIANCE ELECTRIC 5-24V DC INPUT MODULE PLC 57419-1 57-419-1 S-67107-1A RELIANCE ELECTRIC 51381-13 0-51381-13 FLEXPAK CONTROL BOARD REMANNED AND TESTED RELIANCE ELECTRIC 50K POTENTIOMETER NIB 402374-B 102170 Reliance Electric 4RC034 Controller To Terminal Board Sequencing Cable 3ft RELIANCE ELECTRIC 4-CHANNEL 4CH ANALOG OUTPUT MODULE 57C410A 57C-410A 0-57410-1C RELIANCE ELECTRIC 49458-J 49458J RELIANCE ELECTRIC 49458-H 49458H RELIANCE ELECTRIC 48267-B 48267B RELIANCE ELECTRIC 45C98 ENHANCED MEMORY MODULE *NICE* RELIANCE ELECTRIC 45C98 AUTOMATE ENHANCED MEMORY MODULE RELIANCE ELECTRIC 45C-966 45C966 Reliance Electric 45C964 RELIANCE ELECTRIC 45C71 COAX BNC 75OHM LOAD * IN A BOX* RELIANCE ELECTRIC 45C-70 45C70 RELIANCE ELECTRIC 45C-66A 45C66A RELIANCE ELECTRIC 45C-66 45C66 RELIANCE ELECTRIC 45C-65 45C65 Reliance Electric 45C63 Output Module, AutoMate Dual 24VDC, 2A RELIANCE ELECTRIC 45C63 DUAL 24V DC2A OUTPUT * * Reliance Electric 45C63 Automate Dual 24DC Output Module Reliance Electric 45C50 Dual Input Module Reliance Electric 45C46 Input Module RELIANCE ELECTRIC 45C-44 45C44 Reliance Electric 45C44 AutoMate Dual 24V AC/DC Input Module Circuit Rev1 * * RELIANCE ELECTRIC 45C-42 45C42 RELIANCE ELECTRIC 45C42 DUAL INPUT MODULE ELECTRONIC * IN A BOX* Reliance Electric 45C41 Reliance Electric 45C40 Input Module RELIANCE ELECTRIC 45C40 DUAL INPUT MODULE 115VAC/DC * IN A BOX* Reliance Electric 45C40 Dual Input Module RELIANCE ELECTRIC 45C40 DUAL 115 VAC/DC INPUT--SA Reliance Electric 45C40 Automate Input Module AC/DC RELIANCE ELECTRIC 45C-3-EACH 45C3EACH RELIANCE ELECTRIC 45C1A PROGRAMMABLE CONTROLLER 802802-7RD * * RELIANCE ELECTRIC 45C1A AUTOMATE CONTROLLER Reliance Electric 45C166A Output Module, AutoMate Dual 3A RELIANCE ELECTRIC 45C166 * OUT OF BOX* RELIANCE ELECTRIC 45C-108 45C108 RELIANCE ELECTRIC 447-9069 (76624-V) RELAY * OUT OF A BOX* RELIANCE ELECTRIC 447-9047 (76624-W) POLE RELAY * OUT OF A BOX* RELIANCE ELECTRIC 447-9045 (46624-T) RELAY * OUT OF A BOX* RELIANCE ELECTRIC 447-9044 (46624-S) RELAY * OUT OF A BOX* RELIANCE ELECTRIC 447 447 Reliance Electric 425.06.03 Resistor 425.06.03 * in Box* Reliance Electric 424360-EY Motor .5HP, 1725RPM, 3PH, 230/460V Gearbox 445214-FY RELIANCE ELECTRIC 422962-51AL 42296251AL RELIANCE ELECTRIC 422016-RA 422016RA RELIANCE ELECTRIC 419953-1A COUPLING IN BOX!! 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