PXI-6542现货 in stock! 欢迎来电咨询~！！

PXI-6542,

PXI-6542

有福之州-福州聚福兴供应进口工业控制系统成套备件：DCS PLC模块卡件，底板机架机槽，CPU模块，输入输出模块，模拟量模块，电源模块，通讯模块，工业交换机，触摸屏人机界面显示器，插头连接器，连接电缆接插电缆，伺服控制器，电机马达，伺服驱动器，驱动板电源板电路板，采集卡，影像卡，工控机，示教器，工业机器人配件..........
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　　1 引言

　　纺丝机纺出的涤纶原丝需经过牵伸定型后,才具有一定的纤度、强度、伸度和其它的物理性能。VC443A牵伸加捻机用于涤纶复丝生产过程中牵伸加捻工序。牵伸丝为低捻复丝，可直接或经加弹工序后供绸厂使用。它的电气部分由电源控制系统、程序控制系统、锭子交流变频调速系统、热盘控制系统、热板控制系统组成。随着机电一体化技术的发展，对系统的可靠性要求愈来愈高，因PLC具有控制可靠、体积小、功能强、速度快,组态灵活和可扩展性的特点而得到了广泛的应用，成为自动化系统中的基本电控装置，故VC443A牵伸加捻机选用PLC可编程控制器，实现了生产的自动控制。

　　2 PLC选型设计

　　系统选用了日立公司的产品:E-64HR可编程控制器,作为主控单元，它有64个输入/输出点,其中40个开关量输入点，24个输出点，内置式电擦除EEPROM可以保护用户方便的完成程序和参数的修改和存储, PLC根据各输入点所接按钮，接近开关，接触器等电器信号的状态以及编制的软件程序自动控制各电机，电磁阀，指示灯等，完成整个生产的工艺动作程序，钢领板换向及成型自动控制。E-64HR具有多种编程工具:通用编程器PGMJ-R和标准编程器PGNJ等，体积小携带方便，可在现场实地进行程序调整和传送。全部控制程序约276条，可见该系统软硬件资源得到了相当充分的利用。

　　3 VC443A牵伸加捻机工艺

　　3.1 输入信号

　　VC443A牵伸加捻机控制系统的输入信号:主令按钮、限位开关、接近开关、钮子开关、拨盘开关的投入信号，全部为直流输入，共有40点。

　　3.2 输出信号

　　控制的负载主要分成三类:一是7台交流电机:牵伸双速电机M1、油泵电机M2、靠模升电机M3、靠模降电机M4、移丝电机M5、锭子电机M6、风机M7;二是用于控制钢领板升降及侧压辊压差的电磁阀;三是信号灯;四是计数器，共有24点，全部为继电器接点输出信号。

　　3.3 开车主要控制过程

　　(1) 按“油泵开”按钮SB7，使接触器KM5吸合， 油泵开指示灯亮, 油泵电机M2运转。(程序器的输出50对应的LED发光)。

　　(2) 按“低速开”按钮SB9。

　　●辅助接触器KA1吸合，锭子低速运转。(程序器的输出51对应的LED发光)

　　●程序器控制下，使计数器复零，进入准备工作状态，内部定时器T01 T02接通，使钢领板强迫进入废丝盘位置，待TO0延时到断开快速阀YV3，钢领板在程序器控制下微动。(程序器的输出76、65对应的LED发光，延时到熄灭，66、67对应LED交替发光)

　　●定时器TO1延时到，使接触器KM3吸合，牵伸双速电机M1带动牵伸罗拉和上下牵丝盘低速运转，低速指示灯亮，进入挂丝阶段。(程序器的输出52对应的LED发光)

　　(3) 按“高速开”按钮SB11。

　　●辅助接触器KA2吸合，使锭子高速运转。(程序器的输出53对应的LED发光)

　　●程序器控制使电磁阀YV4断电，侧压辊加压。(程序器输出64对应LED发光)

　　●定时器T02接通，延时到后接触器KM4得电，牵伸双速电机M1切换为高速运转，高速指示灯亮，继电器KA3吸合，移丝电机M5运转。(程序器输出54对应的LED发光。55对应的LED发光)

　　●定时器T03延时到后，钢领板强迫上升，靠模上撞块使底部打结开关SA2接通，定时器T04得电，使上升阀失电，实现底部打结，T04延时到上升阀YV1/1再次得电，强迫钢领板快速上升，进入正常牵捻区，待T05延时到后切断快速阀YV3，钢领板在程序器控制下，以正常速度运动，同时接通继电器KA4，靠模升电机M3运转，带动靠模缓慢上升，计数器开计长(程序器56对应的LED发光。65对应的LED在接通快速阀时发光，74对应的LED发光，有计长信号时发光指示)。

　　至此开车过程结束，机器进入正常纺丝。
 

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