51305072-300 CLCN-B 伺服系统

51305072-300 CLCN-B  伺服系统

51305072-300 CLCN-B  伺服系统

51305072-300 CLCN-B  伺服系统是一种可以直接贴装在印刷电路板上的电源转换器，按变换方式一般分为AC转DC或DC转DC。随着科技的发展，电源体积趋向模块化和小型化，于是出现了电源模块。其集成度最高，将开关电源的主要电路集成在芯片中，可以实现宽频调制、隔离及多种保护等功能。

常见的基本原理由以下部分组成，输入整流滤波器，包合整流桥和输入滤波电容。单片开关电源，包括功率开关管、控制器及MOSFET。还有高频变压器、漏级钳位保护电路、光耦反馈电路、输出整流滤波器、偏置电路等部分组成。电源模块通过输入整流滤波器一般可以适配交流85~265V或直流100~370V的输入电压范围，频率有47~400H选择，常规一般为50/60Hz。因为它具有小体积、高集成度、高性价比和最佳性能指标，只需要最简的外围电路，配上少量分立式元件即可使用。并且拥有高效率、高可靠性、设计灵活等优点，现已成为开发设计中小功率开关电源的优选集成电路。

51305072-300 CLCN-B  伺服系统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RA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。

51305072-300 CLCN-B  伺服系统 根据用户按控制要求编制好并存于用户存储器中的程序，按指令步号(或地址号)作周期性循环扫描，如无跳转指令，则从条指令开始逐条顺序执行用户程序,直至程序结束。然后重新返回条指令,开始下一轮新的扫描。在每次扫描过程中，还要完成对输入信号的采样和对输出状态的刷新等工作。PLC的一个扫描周期必经输入采样、程序执行和输出刷新三个阶段。PLC在输入采样阶段:首先以扫描方式按顺序将所有暂存在输入锁存器中的输入端子的通断状态或输入数据读入,并将写入各对应的输入状态寄存器中，即刷新输入。随即关闭输入端口，进入程序执行阶。PLC在程序执行阶段:按用户程序指令存放的先后顺序扫描执行每条指令,经相应的运算和处理后,其结果再写入输出状态寄存器中，输出状态寄存器中所有的内容随着程序的执行而改变。输出刷新阶段:当所有指令执行完毕,输出状态寄存器的通断状态在输出刷新阶段送至输出锁存器中，并通过一定的式(继电器、晶体管或晶闸管)输出，驱动相应输出设备工作。PLC的工作过程，PLC的运行方式初研制生产的PLC主要用于代替传统的由继电器接触器构成的控制装置，但这两者的运行方式是不相同的:

51305072-300 CLCN-B  伺服系统采用硬逻辑并行运行的方式，即如果这个继电器的线圈通电或断电,该继电器所有的触点(包括其常开或常闭触点)在继电器控制线路的哪个位置上都会立即同时动作。

51305072-300 CLCN-B  伺服系统即如果一个输出线圈或逻辑线圈被接通或断开，该线圈的所有触点(包括其常开或常闭触点)不会立即动作，必须等扫描到该触点时才会动作。为了消除二者之间由于运行方式不同而造成的差异，考虑到继电器控制装置各类触点的动作时间一般在100ms以上,而PLC扫描用户程序的时间一般均小于100ms,因此，PLC采用了 -种不同于一般微型计 算机的运行方式扫描技术。这样在对于I/O响应要求不高的场合, PLC 与继电器控制装置的处理结果上就没有什么区别了。

51305072-300 CLCN-B  伺服系统

51305072-300 CLCN-B servo system is a kind of power converter that can be directly mounted on printed circuit board. According to the conversion mode, it is generally divided into AC to DC or DC to DC. With the development of science and technology, the volume of power supply tends to be modular and miniaturized, so power supply module appears. It has the highest integration, and the main circuits of switching power supply are integrated in the chip, which can realize the functions of broadband modulation, isolation and various protections.

The common basic principle consists of the following parts: input rectifier filter, inclusion rectifier bridge and input filter capacitor. Single-chip switching power supply includes power switch tube, controller and MOSFET. It also consists of high-frequency transformer, drain clamp protection circuit, optocoupler feedback circuit, output rectifier filter, bias circuit and so on. The power supply module can generally adapt to the input voltage range of 85~265V AC or 100~370V DC through the input rectifier filter, and the frequency is 47~400H, which is generally 50/60Hz. Because it has small volume, high integration, high cost performance and the best performance index, it can be used with the simplest peripheral circuit and a few discrete components. And it has the advantages of high efficiency, high reliability and flexible design, and has now become the preferred integrated circuit for developing and designing small and medium power switching power supplies.

51305072-300 CLCN-B Servo System In the execution stage of user program, PLC always scans user program (ladder diagram) from top to bottom. When scanning each ladder diagram, always scan the control circuit composed of contacts on the left side of the ladder diagram first, and perform logical operation on the control circuit composed of contacts in the order of first left and then right, first up and then down, and then refresh the state of the corresponding bit of the logic coil in the system RAM storage area according to the result of logical operation; Or refresh that state of the corresponding bit of the output coil in the I/O map area; Or determine whether to execute the special function instruction specified in the ladder diagram. That is, in the process of user program execution, only the state and data of the input point in the I/O image area will not change, while the state and data of other output points and soft devices in the I/O image area or the system RA storage area may change, and the program execution result of the ladder diagram ranked above will play a role in the ladder diagram ranked below that uses these coils or data; On the contrary, in the ladder diagram arranged below, the status or data of the refreshed logic coil can only work on the program arranged above it in the next scanning cycle.

The 51305072-300 CLCN-B servo system periodically scans according to the instruction step number (or address number) according to the program compiled by the user according to the control requirements and stored in the user memory. If there is no jump instruction, the user program will be executed one by one from the instruction until the program ends. Then return to instructions and start the next round of new scanning. In each scanning process, it is necessary to sample the input signal and refresh the output state. A scanning cycle of PLC must go through three stages: input sampling, program execution and output refresh. In the input sampling stage of PLC, firstly, the on-off state or input data of all the input terminals temporarily stored in the input latch are read in sequence by scanning mode, and will be written into each corresponding input state register, that is, the input is refreshed. Then close the input port and enter the program execution stage. In the program execution stage, PLC scans and executes each instruction according to the sequence in which the user's program instructions are stored. After corresponding operation and processing, the result is written into the output status register, and all the contents in the output status register change with the execution of the program. Output refresh stage: when all instructions are executed, the on-off state of the output status register is sent to the output latch in the output refresh stage, and it is output through a certain formula (relay, transistor or thyristor) to drive the corresponding output equipment to work. The working process and operation mode of PLC PLC is mainly used to replace the traditional control device composed of relay contactors, but the operation modes of the two are different:

The 51305072-300 CLCN-B servo system adopts the mode of hard logic parallel operation, that is, if the coil of this relay is powered on or off, all the contacts of the relay (including its normally open or normally closed contacts) will act at the same time in which position of the relay control line.

51305072-300 CLCN-B servo system means that if an output coil or logic coil is turned on or off, all contacts of the coil (including its normally open or normally closed contacts) will not act immediately, and they will only act when the contact is scanned. In order to eliminate the difference caused by different operation modes between them, considering that the action time of various contacts of relay control devices is generally more than 100ms, and the time for PLC to scan user programs is generally less than 100ms, therefore, PLC adopts a scanning technology of operation modes different from that of general microcomputers. In this way, there is no difference in the processing results between PLC and relay control device when I/O response is not high.

51305072-300 CLCN-B  伺服系统

主营产品，供应，充足库存
Foxbore (福克斯波罗) : I/A Series 系统，FBM 全系列(现场输入/输出模块)
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数据通信及处理等。
Vestinghouse (西屋) : 1C31 系列DCS系统、CPU、OVATI0N 系统、WDPF系统、WEStation系统备件。
Triconex (英维思) :冗余容错控制系统、基于三重模件冗余(TMR) 结构的现代化的容错控制器。
EMERSON (艾默生) :模块、卡件、驱动器等各类备件。
XYCOM: XVME 系列
Bently (本特利) : 3500/3300 系统。
Rockwell (罗克韦尔) : ICS 系统。;
ABB: PM全系列DCS系统、ICT高压变频器系列、工业机器人备件DSQC系列、INFI 90等。
Bailey (贝利) : BRC 系列DCS系统等。
Allen-Bradley: 1756、 1785、 1771、 1746 全系列系统等。
Yokogawa (横河) : CP系列等。
Honeywell (霍尼韦尔) : TK/TC/CC 系统等。
Reliance (瑞恩) : 57C 系列等。
Modicon (莫迪康) : AS系列PLC系统备件。
MOORE,西某子数控系统等。
Motorola (摩托罗拉) : MVME 162、 MVME 167、 MYVME1772、MVME177等系列。
XYCOM: I/0、VmeE 板和处理器等。
GE (通用电气) : IC698/IC697 全系列PLC系统、模块、卡件、驱动器等各类备件。
Yaskawa (安川) :伺服控制器、伺服马达、伺服驱动器。
Bosch Rexroth (博世力士乐) : Indramat, I/O模块，电机，PLC控制器,驱动模块等。
Woodward (伍德沃德) : SPC 阀位控制器、PEAK150 数字控制器。
WINGREEN 自动化控制模块