描述

在生產(chǎn)機(jī)械的自動控制領(lǐng)域，PLC順序控制系統(tǒng)的應(yīng)用量大面廣。然而，工藝不同的生產(chǎn)機(jī)械要求設(shè)計(jì)不同的控制系統(tǒng)梯形圖。目前，不少電氣設(shè)計(jì)人員仍然采用經(jīng)驗(yàn)設(shè)計(jì)法來設(shè)計(jì)PLC順序控制系統(tǒng)，不僅設(shè)計(jì)效率低，容易出差錯，而且設(shè)計(jì)階段難以發(fā)現(xiàn)錯誤，需要多次調(diào)試、修改才符合設(shè)計(jì)要。本文提出的4種簡易設(shè)計(jì)方法，能快速地一次設(shè)計(jì)成功PLC順序控制系統(tǒng)。

順序控制系統(tǒng)的特點(diǎn)及設(shè)計(jì)思路

1．特點(diǎn)順序控制系統(tǒng)是指按照預(yù)定的受控執(zhí)行機(jī)構(gòu)動作順序及相應(yīng)的轉(zhuǎn)步條件，一步一步進(jìn)行的自動控制系統(tǒng)。其受控設(shè)備通常是動作順序不變或相對固定的生產(chǎn)機(jī)械。這種控制系統(tǒng)的轉(zhuǎn)步主令信號大多數(shù)是行程開關(guān)（包括有觸點(diǎn)或無觸點(diǎn)行程開關(guān)、光電開關(guān)、干簧管開關(guān)、霍爾元件開關(guān)等位置檢測開關(guān)），有時也采用壓力繼電器、時間繼電器之類的信號轉(zhuǎn)換元件作為某些步的轉(zhuǎn)步主令信號。

為了使順序控制系統(tǒng)工作可靠，通常采用步進(jìn)式順序控制電路結(jié)構(gòu)。所謂步進(jìn)式順序控制，是指控制系統(tǒng)的任一程序步（以下簡稱步）的得電必須以前一步的得電并且本步的轉(zhuǎn)步主令信號已發(fā)出為條件。對生產(chǎn)機(jī)械而言，受控設(shè)備任一步的機(jī)械動作是否執(zhí)行，取決于控制系統(tǒng)前一步是否已有輸出信號及其受控機(jī)械動作是否已完成。若前一步的動作未完成，則后一步的動作無法執(zhí)行。這種控制系統(tǒng)的互鎖嚴(yán)密，即便轉(zhuǎn)步主令信號元件失靈或出現(xiàn)誤操作，亦不會導(dǎo)致動作順序錯亂。

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(jì)算機(jī)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，福克斯波羅、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(jī)器人系統(tǒng)配件，大型伺服系統(tǒng)備件。

Omron Sysmac CPM1A-40CDR-D+CPM1A-8ER Extension Module

Pacific Scientific 5240 Indexer Drive 115VAC

YASKAWA SERVOPACK CPCR SWA6B Y12

ACROSSER INDUSTRIAL COMPUTER SYSTEM

IBM R52 R51 R50 R60 CDRW DVD Drive UJDA770 39T2667

Dell 8H352 Dazzle dv.now-AV V1.4 Video Card NEW

Mitsubishi Melsec AJ72 P25 AX41 AY51 AY13 Full PLC

National Instruments NI SB-GPIB/TNT Module

Cetia MD-RAM-34 S-RAM 3.3.6

Cyber Optics LFM25 Sensor NEW

ADVANTECH PCA-6187 A2 Single Board Computers

AL81G Digitizer 8bit 1GHz A/D High Speed scanning Board

National Instruments NI PCI-GPIB IEEE 488.2 188513B-01

NI National Instruments PCI-GPIB IEEE 488.2 183617J-01

RVSI 63552 REV-B with TTM610

SONIX SMC870 4 Axis Motion Control Driver Card

TEKNIC SST-1500-103 SERVO STEPPER DRIVE 2 units

Panasonic AC Servo MDDDT5540 1.5KW Driver

OMRON SYSMAC CS1H-CPU65H CS1HCPU65H CPU Unit

KEYENCE LK-2001 CCD LASER DISPLACEMENT CONTROLLER

FORCE SPARC CPU-5V CPU-5V/64-100-2 VME MAINFRAME CARD

NATIONAL INSTRUMENTS NI PCI-DIO-96 CARD 182920D-01

NI National Instruments PCI-GPIB IEEE 488.2 183617H-01

NI National Instruments PCI-GPIB IEEE 488.2 183617K-01

PCI-6308 REV A2 Isolated 8-Ch 12-bit Vol Output Card

Narda 4372-2 POWER DIVIDER 0.8-2.5 GHz NEW

MELLES GRIOT 59LLS393 LASER SCAN LENS

SPECIAL OPTICS LASER BEAM EXPANDER P/N 3001714

NEWPORT MM-1 OPTICAL LASER MIRROR Qty:2

SPECIAL OPTICS 56-30-2-8X LASER BEAM EXPANDER

COGNEX IN-SIGHT I/O EXPANSION MODULE

COGNEX IN-SIGHT 3400 ISS-3400 Vision controller system

Lot of 2 Gore ReadyFlex Microwave Cable Assemblie 18GHz

AGILENT 1163A Infiniium 1.5GHz PASSIVE PROBE Full Set

JSR Ultrasonics SONIX RP-H2 remote pulser

Agilent HP E3614A 0-8VDC 6A DC Power Supply

NCC KZJ 6.3V 2200UF LOW ESR Motherboard Cap QTY=200pcs

HP/Agilent N2298A 1.5m Cable Module NEW

Digi AccelePort EIA-232 30002342-03 55000536-05 REV F

OREGON MICRO SYSTEMS PC39-8 MOTION CONTROLLER

POWEREDGE 1950 670 Watt 1U REDUNDANT POWER SUPPLY A670P

HP 8493B Fixed Attenuator 3dB 6dB 20dB 30dB DC to 18GHz

IMAGING TECHNOLOGY OFG-VP1100 OFGVP1100 Frame Grabbers

Agilent HP E3614A 0-8VDC 6A DC Power Supply

ANNAPOLIS MICRO SYSTEMS Foxfire II Rev F

MICOM DIS MegaPAC Display-Clock-M?em 100-3224-001A

GE Fanuc 90-30 PLC CPU323P IC693CPU323P 10 SLOT SYSTEM

GE Fanuc 90-30 PLC CPU351 IC693CPU351-FN 10 SLOT SYSTEM

ADTECH SPIRENT 401311 GENERATOR+400302A DS3 Interface

Comtrol 5002200 Rocketport Plus uPCI Quad/Octa

Dell Qlogic QLA200 2Gbps PCI-x Fibre Channel HBA

Spirent Adtech AX/4000 Ethernet Control Module 401427

Force SYS68K CPU-33B/4 VME Board

MODCOMP CPU VLAN-E PCB 25142 REV A2

MODCOMP CPU PCB 01-W3623B-03B 01 W3623B 03B

ADEPT TECH 10332-00655 ENHANCED VME VISION INTERFACE

ADLINK PCI-8124 4-CH High-speed Triggering Board

AUTOMATE MULTI E/A VME GRUNDKARTE D-2100

ANIMATICS Motion Controler RTC3000 with DEMEX

OMRON E5AK-AA2-500 DIGITAL CONTROLLER

DELL ND674 4GB/S PCI-E HOST BUS ADAPTER HBA NEW

YASKAWA SERVOPACK SGDE-04AP 400WATT SERVO DRIVE

Agilent 87222C Coaxial Transfer Switch DC to 26.5 GHz

JSR Ultrasonics DPR500 Dual Channel Pulser/Receiver

Agilent 87222D Coaxial Transfer Switch DC to 40 GHz NEW

Asymtek Multi-Axis Controller A-201D

Beckhoff BK3110 Profibus Koppler 24V BK 3110 2X KL1104

Omron ES100P AAHFE DIGITAL CONTROLLER Meters

Omron F300S2R F300-S2R SHUTTER CAMERA

CyberOptics 6604044 Laser Module

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Agilent A8495B Manual Step Attenuator 18GHz 0-70dB

Agilent E6392-60001 Universal DC Power Adaptor NEW

Finisar FTRJ8519P1BNL 2GB SFP Transceiver GBIC X12pcs

OMRON 3G8C2-CK000 3G8C2CK000 CARD

Agilent N2772A 20 MHz Differential Probe

RVSI 53128 P/N 49335-1

METCAL SSC 626A SSC-626A SOLDER TIPS Lot of 8

OMRON C200HE CPU42 NC113,OC225,ID212 PLC

Agilent N2780A 2 MHz 500A AC/DC Current Probe

RVSI 375501 Anorad VPC-2000A&VPC-2000B

KEYENCE KV-U4 AC POWER SUPPLY FOR KV-300 PLC

Olympus WHSZ15X-H 16 5 TO-5 Adjustable eye piece

Agilent 3458A Digital Multimeter 8.5 Digits

KOLLMORGEN SERVOSTAR 400-M 443M-S SERVO AMPLIFIER

SCION LG-3 Frame Grabber REV C ACUITY IMAGING PCI

GSI lumonics 6056049 P/N:6056049 Board

National Instruments NI PCI-DIO CARD 185183C-01 PCI

PCL-728 Isolated 2-channel D/A Output Card

RVSI Video Capture card 070-200000 Rev B

RVSI Video Capture card 070-200200 Rev C

Imaging Technology Incorporated IC-PCI Frame Grabber

Omron G3B-205S Solid state relay Qty:2

BECKHOFF BK5120 KL1418 KL2408 KL1114 KL2134 KL3202 BUS