詳細參數(shù) | |||
---|---|---|---|
品牌 | Schneider | 型號 | 490NRP25400 |
結構形式 | 模塊式 | 安裝方式 | 控制室安裝 |
LD指令處理器 | 硬PLC | 功能 | 光纖中繼器 |
工作電壓 | 電源組24VDC | 輸出頻率 | 266兆赫 |
處理速度 | 50MHz | 程序容量 | 256MB |
產品認證 | UL | 環(huán)境溫度 | -40,85°C |
環(huán)境濕度 | 93%符合IEC60068 | 加工定制 | 否 |
重量 | 2.856公斤 | 產地 | 法國 |
施耐德 490NRP25400 光纖中繼器
制造商:施耐德電氣
產品編號:490NRP25400
產品類型 : 光纖中繼器
重量 : 2.856 公斤
490NRP25400 描述:
1、中央處理器(CPU)
中央處理器(CPU)一般由控制電路、運算器和寄存器組成,這些電路一般都集成在一個芯片上。CPU通過地址總線、數(shù)據(jù)總線和控制總線與存儲單元。輸入輸出(I/O)接口電路相連接。
490NRP25400 主要完成以下的功能:
(1)將輸入信號送入PLC中存儲起來。
(2)按存放的先后順序取出用戶指令,進行編譯。
(3)完成用戶指令規(guī)定的各種操作。
(4)將結果送到輸出端。
(5)響應各種外圍設備(如變程器、打印機等)的請求。
2、490NRP25400 存儲器
PLC內部存儲器有兩類:一類是RAM(即隨機存取存儲器),可以隨時由 CPU對它進行讀出、寫入;另一類是ROM (即只讀存儲器),CPU只
從中讀取而不能寫入。RAM主要用來存放各種暫存的數(shù)據(jù)、中間結果能及用戶正在調試的程序,ROM主要存放監(jiān)控程序及用戶已調試好的程序,這些程序都事先燒在ROM芯片中,開機后便可運行其中程序。
490NRP25400 Central processing unit (CPU) is generally composed of control circuit, arithmetic unit and register. These circuits are generally integrated on one chip. CPU is connected with storage unit and b / output (I / O) interface circuit through address bus, data bus and control bus.
It mainly perbs the following functions:Send the b signal to PLC for storage.Take it out in the order of storage
User instructions for compilation.Complete various operations specified by user instructions.Send the result to the output.Respond to requests from various peripheral devices (such as range changers, printers, etc.).
There are two types of PLC internal memory: one is RAM (random access memory), which can be read and written by CPU at any time; the other is ROM (read only memory), which is only used by CPU490NRP25400 Read from but not write to. Ram is mainly used to store various temporary data, intermediate results and programs being debugged by users. ROM is mainly used to store monitoring programs and programs debugged by users. These programs are burned in ROM chip in advance, and the programs can be run after startup.
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