ZCP270--P0926CP-  控制器  使用高速通信功能

·品牌: Foxboro ( by Schneider Electric )

产品编号:PO926CP

·型号:ZCP270 Control Processor

·类型:基于微处理器的AMD Elan SC520 (运行频率为100 MHz)，带有存储程序，使用高速通信功能

·内存(每个处理器): 16 MB SDRAM，32 MB闪存

工作温度:О至60°C (32至140°F)

工作相对湿度:5至95%(非冷凝)

·工作海拔:-300至+3,000米(-1,000至+10,000英尺)

·工作振动:0.5g (5至500 Hz)

。单宽处理器模块。容错版本由两个单宽处理器模块组成，带有一个互连的容错连接器。

尺寸(高x宽x深)，约:22.8cm x 3.43cm x 44.7cm

装运重量:4 Kg

ZCP270--P0926CP- 控制器是指按照预定顺序改变主电路或控制电路的接线和改变电路中电阻值来控制电动机的启动、调速、制动和反向的主令装置。

控制器是由程序计数器、指令寄存器、指令译码器、时序产生器和操作控制器组成，它是发布命令的“决策机构”，即完成协调和指挥整个计算机系统的操作。

控制器的基本功能与工作原理如下：

ZCP270--P0926CP- 控制器的基本功能。从主存中取出一条指令，并指出下一条指令在主存中的位置；对指令进行译码或测试，产生相应的操作控制信号，以便启动规定的动作；指挥并控制CPU、主存、输入和输出设备之间的数据流动方向。

控制器的工作原理。ZCP270--P0926CP- 根据控制器产生微操作控制信号的方式不同，控制器可分为硬布线控制器和微程序控制器，两类控制器中的PC和IR是相同的，但确定和表示指令执行步骤的办法以及给出控制各部件运行所需要的控制信号的方案是不同的。硬布线控制器的基本原理是根据指令的要求，当前的时序及外部和内部的状态，按时间的顺序发送一系列微操作控制信号。它由复杂的组合逻辑门电路和一些触发器构成，因此又称为组合逻辑控制器。

(1)ZCP270 P0926CP福克斯波罗控制器输入采样阶段。在这一阶段中，PLC以扫描方式读入所有输入端子上的输入信号，并将各输入状态存入对应的输入映像寄存器中。此时，输入映像寄存器被刷断。在程序执行阶段和输出刷新阶段中，输入映像存储器与外界隔离，其内容保持不变，直至下一个扫描周期的输入扫描阶段，才被重新读入的输入信号刷新。可见，PLC在执行程序和处理数据时，不直接使用现场当时的输入信号，而使用本次采样时输入到映像区中的数据。一般来说，输入信号的宽度要大于一个扫描周期，否则可能造成信号的丢失。

ZCP270--P0926CP-  控制器  使用高速通信功能

· Brand: Foxboro (by Schneider Electric)

Product Number :PO926CP

· Model :ZCP270 Control Processor

· Type: Microprocessor-based AMD Elan SC520 (operating at 100 MHz) with a stored program, using high-speed communication capabilities

Memory (per processor): 16 MB SDRAM, 32 MB flash

Operating temperature: 60°C (32 to 140°F)

Operating relative humidity :5 to 95%(non-condensing)

· Working altitude :-300 to +3,000 m (-1,000 to +10,000 ft)

· Working vibration :0.5g (5 to 500 Hz)

. Single width processor module. The fault-tolerant version consists of two single-width processor modules with an interconnected fault-tolerant connector.

Dimensions (H x W x D), approx. 22.8cm x 3.43cm x 44.7cm

Shipping weight :4 Kg

ZCP270-- P0926CP-controller refers to the main command device that changes the wiring of the main circuit or control circuit and changes the resistance value in the circuit to control the start, speed regulation, braking and reverse of the motor in accordance with the predetermined sequence.

The controller is composed of program counter, instruction register, instruction decoder, timing generator and operation controller, which is the "decision mechanism" of issuing commands, that is, to complete the coordination and command of the operation of the entire computer system.

The basic functions and working principles of the controller are as follows:

ZCP270- P0926CP- Basic functions of the controller. Fetch an instruction from main memory and indicate the position of the next instruction in main memory; Decode or test instructions to generate corresponding operational control signals in order to initiate specified actions; Direct and control the direction of data flow between CPU, main memory, input and output devices.

The working principle of the controller. ZCP270- P0926CP- According to the controller generates the microoperation control signal in different ways, the controller can be divided into hardwired controller and microprogram controller, PC and IR in the two types of controllers are the same, but the method of determining and indicating the execution of instructions and giving the control signal needed to control the operation of each part is different. The basic principle of the hard-wired controller is to send a series of microoperating control signals in the order of time according to the requirements of the instruction, the current timing and the external and internal states. It is composed of complex combinational logic gate circuit and some triggers, so it is also called combinational logic controller.

(1)ZCP270 P0926CP Foxboro controller input sampling phase. In this stage, the PLC reads input signals on all input terminals by scanning, and stores each input state into the corresponding input image register. At this point, the input image register is brushed off. During the program execution phase and the output refresh phase, the input image memory is isolated from the outside world and its contents remain unchanged until the input scan phase of the next scan cycle, when it is refreshed by the input signal that is re-read. It can be seen that when the PLC executes the program and processes the data, it does not directly use the input signal at the time of the scene, but uses the data input to the image area during this sampling. Generally speaking, the width of the input signal should be greater than one scan cycle, otherwise the signal may be lost.