描述

S7-200的程序有三種：主程序、子程序、中斷程序。

主程序只有一個，名稱為OB1。

子程序可以達到64個，名稱分別為SBR0~SBR63。子程序可以由子程序或中斷程序調(diào)用。

中斷程序可以達到128個，名稱分別為INT0~INT127。中斷方式有輸入中斷、定時中斷、高速計數(shù)中斷、通信中斷等中斷事件引發(fā)，當CPU響應中斷時，可以執(zhí)行中斷程序。

由這三種程序可以組成線性程序和分塊程序兩種結構。

一、線性程序結構

_線性程序是指一個工程的全部控制任務都按照工程控制的順序?qū)懺谝粋€程序中，比如寫在OB1中。程序執(zhí)行過程中，CPU不斷地掃描OB1，按照事先準備好的順序去執(zhí)行工作，如圖：

顯然，線性程序結構簡單，一目了然。但是，當控制工程大到一定程序之后，僅僅采用線性程序就會使整個程序變得龐大而難于編制、難于調(diào)試了。

二、分塊程序結構

分塊程序是指一個工程的全部控制任務被分成多個小的任務塊，每個任務塊的控制任務根據(jù)具體情況分別放到子程序中，或者放到中斷程序中。程序執(zhí)行過程中，CPU不斷地調(diào)用這些子程序或者被中斷程序中斷，

分塊程序雖然結構復雜一些，但是可以把一個復雜的過程分解成多個簡單的過程。對于具體的程序塊容易編寫，容易調(diào)試。從總體上看，分塊程序的優(yōu)勢是十分明顯的。

歐美品牌停產(chǎn)的，常用的“PLC”備品備件

我司產(chǎn)品應用于以下領域：

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。

A72127 Waters 600 Multisolvent Delivery System HPLC

A72125 Waters 4000 Pump System Controller HPLC

A72126 Coherent Innova 90 Argon Ion Laser System

C74126 Laserscope KTP/532 Nd:YAG Surgical Laser System

C73470 Spectra-Physics T20-8S40 Diode Laser System

C65584 Perkin Elmer 1002700 Vacuum Ion Pump System

C51594 Agilent 16950A 600MHz State/4GHz Timing/1Meg Mem

A73479 Blue M Oven CR07-1406F-2,204°C/400°F

C61589 Varian G-292 Rotating Anode X-Ray Tube in B-130H

C73507 Cartesian HONEYBEE Protein Crystallization Syste

C71355 Isel Wafer Handling Robot w/Built-In Controller

G75594 Sanyo CO2 Incubator MCO-18AIC(UV)

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C70346 Veeco Dektek SXM Atomic Force Microscope Control

G75595 Sanyo CO2 Incubator MCO-18AIC(UV)

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L75707 Nikon Optiphot-2 Microscope&Camera/Controll?er

L75708 Precision 200R Durafuge Refrigerated Centrifuge

G73928 HP G1330A ALS Therm Series 1100

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G71854 NSK XY-HRS120-RH2SN?F Linear Stage w/Ballscrew

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G74627 Labsystems Flouroscan II Fluorescent Type 373

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G71680 Valhalla Scientific D6100 Spectral Pwr.Analyzer

G54942 Alcatel IPUP A100L Dry Vacuum Pump

G75678 Argonaut Tech.Quest 210 SLN Control&Quest 210

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G54937 Alcatel IPUP A100L Dry Vacuum Pump

C72909 Isel Robotik IPA-58-VKS3-1 5-8″Wafer Prealigner

AC44258 Prometrix Spectromap Film Wafer System SM200/e

C69221 Wentworth FIX-R-1-E Probe Card Repair Station

A34721 Thermotron Environmental Chamber,460/3/60

L75904 Karl Storz Equimat&Endomat System w/stand

C67797 R&K Rucker Kolls 300 Probe Card Building Station

A74366 Sartorius Sartocheck 3 Filter Integrity Tester

A74400 V&P Scientific VP 707 Magnetic Levitation Stirr

C54282 Hot Cold Temp Vacuum Wafer Chuck 11″Stage

C67233 Adept Robot Module 90400-04318/XY-P177S180-1

C56452 Tektronix TLA715 Logic Analyzer(Calibrated 2010

G71828 DeHaart MPC 24/29 Screen Printer

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A73306 Mar Research Mar345 Image Plate Detector

A75549 Shimadzu RF-1501 Spectrofluoroph?otometer

C74536 Markem 590 SGT Pad Printer&Touch Panel Display

A69922 Lot of(2)EPE Computer Power Center PowerPacs

C51252 Tektronix TLA715 Logic Analyzer(Calibrated 2010

C53849 Precision Measurement Microscope Sys w/X-Y Stage

A73329 Oxford Cryosystems Cooler Evap Probe,Pump Unit

CC44406 MRL 14TC-45 Conveyer Furnace/Reflow Oven

L75274 Cleansorb C5095DCC Dry Bed Absorber Cabinet

K67775 K&S Kulicke&Soffa 6490 Semi-Auto DieBonder

K72692 Quester Tech UFT10-02 Liquid Source Gas Cabinet

L70515 Varian DS 102 Dual Stage Rotary Vane Vacuum Pump

C72407 Flexus 2 Thin Film Stress Measurement System

C72662 Powervar GPI 3-Phase Power Conditioner 125kVA

A75741 Lab Products 59015HD Vet/Animal Caging System

C75836 Leitz Diavert Trinocular Inverted Microscope

C69606 Intevac NCT 200L Assy Sputtering Source Gun

C70441 Intevac Sputtering Source NCT Intervace Mark V

A39173 Carbolite Type GPC 12/65 Chamber Furnace,1200°C

AH43124 UTE SCS i 124 Substrate Vertical Lap Cleaner

A60926 ALPHASEM AG DB608-PRL Die Bonder w/Selectron

AC44359 Prometrix Resistivity Prober 6″VR-30A System

C71872 CTI-Cryogenics Cryo-Torr 100 Cryopump Cryo Pump

K68523 Kern CPM1 Stereocomparato?r Mono/Stereo

K75665 Nikon Optiphot-2 Trinocular Lab Microscope

R75873 UNISEM Model PPD1500A-A02-AM?T Chiller

L75702 GE Fractionation Kit*NIB*11-0035-99

AT51403 Hughes Model 2500 Automatic Die Bonder

A64698 Advanced Energy PEP-2500 Plasma RF Power Supply

G74798 Alphasem AG DB 608-PRL Die Bonder w/Selectron

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A72761 AMC Automation&Modular Component Modu-Con MX2

CT74225 Kevex 7078 Wafer Analysis,X-Ray Source Control

G61761 Applied Biosystems 373 DNA Sequence Stretch

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A75223 Power-One 3G37-36 Power Distrubution Unit 40 kVA

C56823 Dage Microtester 22 10kg Shear Test Load Cell

C70560 Royce MBS200 Wire Bond Pull Tester MBS 200

A58949 ESEC SA Wafer Mounter 650.010/6

A72207 Lot of Quality Transformers Corp.10kVA,7.5kVA

A72210 Lot of Lithonia Lighting Reflectors,HID Housing

A74404 Wave Biotech O2MIX Controller,O2MIX20

C53689 Tenney 5 Environmental Chamber(m/n T5-2-100350)

C52722 MCT 4600 Chip Carrier IC Handler for 84PLCC

C52721 MCT 4610 Chip Carrier IC Handler for 28PLCC

C52701 MCT 4600 Chip Carrier IC Handler for 52PLCC

L74808 Welch Allyn Video Path Colposcope 89021A

G63902 Forma Scientific 8325 Bio Freezer

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C52694 MCT 3608E IC Handler for 300mil 20pin DIP 3608E3

C52696 MCT 3616E IC Handler(m/n 3616E48P)

C70012 Dage Microtester 22 500gm Shear Test Load Cell

C68808 Davidson Optronics D657-100A Autocollimator

K72695 Innovate 9000 Semiconductor Test Head 220V

C52790 Dage Microtester BT22 5kg Pull Test Load Cell

C52792 Dage Microtester BT22 200g Pull Test Load Cell

C52791 Dage Microtester BT22 1.5kg Pull Test Load Cell

C67867 Dage BT22-LC02 50gm Pull Test Load Cell for BT22

L75273 Asymtek MM-FSLU-STD Upstream Wafer Loader

L75438 Varian DS-102 Dual Stage Rotary Vane Vacuum Pump

C67115 HP Agilent 2090-0357 Vacuum Fluorescent Display

C67234 Adept Robot Module 90403-41063R XY-HRS063CS110A?D