描述

在S7-200系列中，尋址方式分為兩種：直接尋址和間接尋址。直接尋址方式是指在指令中直接使用存儲器或寄存器的元件名稱和地址編號，直接查找數(shù)據(jù)。間接尋址是指使用地址指針來存取存儲器中的數(shù)據(jù)，使用前，首先將數(shù)據(jù)所在單元的內(nèi)存地址放入地址指針寄存器中，然后根據(jù)此地址存取數(shù)據(jù)。本書僅介紹直接尋址。

直接尋址時，操作數(shù)的地址應(yīng)按規(guī)定的格式表示。指令中數(shù)據(jù)類型應(yīng)與指令相符匹配。

在S7-200系列中，可以按位、字節(jié)、字和雙字對存儲單元進行尋址。尋址時，數(shù)據(jù)地址以代表存儲區(qū)類型的字母開始，隨后是表示數(shù)據(jù)長度的標(biāo)記，然后是存儲單元編號；對于按位尋址，還需要在分隔符后指定位編號。

在表示數(shù)據(jù)長度時，分別用B、W、D字母作為字節(jié)、字和雙字的標(biāo)識符

歐美品牌停產(chǎn)的，常用的“PLC”備品備件

我司產(chǎn)品應(yīng)用于以下領(lǐng)域：

1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》

2,《智能平鋼化爐系統(tǒng)制造》

3,《PLC可編程輸送控制系統(tǒng)》

4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》

6,《化工廠藥液恒流量計算機控制系統(tǒng)》

7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列

本特利，英維思，伍德沃德，?？怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂，ACSO，力士樂等各大品牌的DCS系統(tǒng)配件，機器人系統(tǒng)配件，大型伺服系統(tǒng)備件。

G72011 Varian ProStar 420 Autosampler

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A69318 Thermo Forma-86C ULT Freezer,Model 8558

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A68353(2)Lindberg Tube Furnaces Type 54357,54357A

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C70101 Blue M OV-490A-3 Mechanical Convection Oven

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G72042 THK GL15S16+1250L Positioning Linear Stage

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AT51338 Daikin Industries UBR3E6 Brine Chilling Unit

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A72763 HP 59864A Ionization Gauge Controller

CT50715 Asyst CS-3500NS UTM-3500NS Wafer Robot Control

C52037 Reznor Dual Natural Gas Heater System(1.66CFM)

C53165 SensArray 8″Instrumented Wafer 1501B-8-0053

C53164 SensArray 8″Instrumented Wafer 1530B-8-0109

C53162 SensArray 8″Instrumented Wafer 1530B-8-0110

C53160 Lot 2 LSI Logic 8″Instrumented Test Wafers

C54964 Accu-Fab Accubot Robot&1250 Motion Controller

C58258 HP E7104A-115 Cerprobe Prober Test Head Interfac

A69918 Norlake Specialty Transformers ST-5548,45 kVA

A67817 Lakeshore VSM Controller Model 7300

A68752 Goulds Pump SST 1X2-6 w/Baldor Motor HP5

A68350 Westinghouse Reduced Voltage Starter,Vectrol

A68354 Varian Polychrom 9065 Diode Array Detector

A68753 Baldor HP5 Motor w/Goulds Pump SST 9STK1

A68754 US Electric Motor Unimount 125 HP10 w/Blower

N71773 Eurotherm TU1451 SCR Power Controller

C72849 Applied Biosystems 373A DNA Sequencer Stretch

A72855 Panasonic AJ-D455 DVCPRO Editor

A72857 Olympus CLV-U20 EVIS Light Source

N65703 Nilfisk GSJ-115 Dry Vacuum Cleaner GSJ115

A69509 Vemco Mark XII V-Track Drafting Machine

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C54757 Thermonics T-2420B Precision Temp Forcing System

CP41904 Parker HPD45N High Performance Servo Drive/Amp

CP41902 Parker Z920-MO Compumotor Brushless Servo Motor

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C69263 Brooks Automation Wafer Loader Robot 002-7200-21

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C64503 General Radio GenRad 1272 Board Test Workstation