3500/33本特利3500/333500/33本特利3500/33
编程需要敢于实践的信心
我曾经教过一个学生学AutoCAD，我对她的*要求就是实践。我告诉她：你随便怎么操作，大不了一张图重画；zui坏的结果是系统崩溃，没关系，系统重做，再来；只要电脑没被砸了，怎么都行。两年后，我再看到她做的CAD图纸，也自叹不如。
同样道理，只有不断地在PLC上运行这些指令，观察运行的结果，才能弄清PLC指令的作用。很多初学者对PLC一脸的迷茫，往往是出于一种畏惧，担心损坏设备。而这些畏惧是没有任何道理的。仔细的阅读手册是非常重要的，但是仅靠读书是成不了一个工程师的。更何况手册上的内容并非面面俱到。我在接触到那些不熟悉的指令时，喜欢单独编一个小程序，让PLC运行。然后逐个修改条件，观察运行的结果（MicroWin为用户提供了非常好的监控手段），反过来再重新理解手册的描述，这样就可以非常直观的理解这些指令的作用和使用方法。
郑娟萍
厦门仲鑫航自动化设备有限公司
不必担心自己写的程序会有什么问题，会影响PLC的正常工作。程序有没有问题，只有让PLC运行了才能发现。而发现问题并解决问题就是对自己能力的提高。撇开硬件操作不谈，单就软件来说，我还真没有遇到过由于软件问题而损坏PLC的事。在这里不必担心继电器电路接错线可能造成的后果。所以，大胆的实践是PLC编程的必由之路。
当然，大胆实践并不是野蛮操作，而是必须遵循必要的规范。还有一个要注意的，在程序未经可靠性证实之前，千万不要挂接负载，以免造成不必要的损失。数字量的输出有LED显示；而模拟量处理可以采用一些硬件或软件模拟手段来解决。
Hubbell HBL2321S Twist-Lock Plug
GE Duplex Receptacle 125V 15A Brown (Box of 6)
GE 5262-1 Duplex Receptacle 125V 15A Brown (Box of 8)
WOODHEAD TURNEX L6-30R 30 AMP 250V Grounded Twistlock Receptacle
Meltric Corp. 89-66043-080 Inlet/Connector/Housing 480V 60A 3P 3PH
Cooper 1547 Cord Connector 15A 125V 2P 3W
Hubbell HBL2323 Receptacle 20A 250V
Hubbell HLD Lockout Device
Hubbell 231A Receptacle 30A 250V
Hubbell Twist-Lock Receptacle 20A 125/250V
Hubbell Twist-Lock Plug 20A 250V
Pass & Seymour Duplex Receptacle 125V 15A
General Electric WC596 65-1 Receptacle 250V 20A
Hubbell Brown Single Receptacle 125V 15A
Bryant L5-20 Flanged Inlet 20A 125V
Carlon 93C6 Outlet Box with Leviton Receptacle and Ground Fault Interrupter
Unicor 8CERW Office Furnishings Plug 15A (Orange)
Bryant S611 Wall Plates Single Receptacle
TayMag Low Profile Weatherproof Cover Gray
Pass & Seymour 2095-I GFCI Duplex Receptacle w/ Trip Indicator Light 125VAC 20A
Leviton B 271887 Ground Fault Circuit Interrupter 125V 60Hz 20A GFCI.A DDFT.A
TayMac MM110W Weatherproof Receptacle Cover
Pass & Seymour Double Electrical Outlet 125V 20A (Ivory)
Pass & Seymour Double Electrical Outlet 125V 15A (Ivory)
Cooper AH460M17W Interlocked Receptacles Enclosure Series 309 (No Cap)
Pass & Seymour Double Electrical Outlet 125V 15A (White)
Cantex FSC/FSE Junction Boxes with (2) Outlets
Weidmuller 991548 Rail Mount Outlet Module 125V 15A
Amphenol 97-3102A28-12P Pin Receptacle
daykin PPD-09 Program Port
Hubbell Twist-Lock Outlet 20A 480V
Thomas & Betts Russellstoll 9C54U2 DuraGard Waterproof Connector
Panduit CF1062EIY Mini-Com Module Frame
Pass & Seymour 5362-AI Duplex Receptacle 125V 20A
Pass & Seymour 5262 Duplex Receptacle 125V 15A
GE GE4069-2 Single Receptacle 250V 15A 2P
Thomas & Betts Steel City 58 C 7 Handy Box Duplex Receptacle Cover
Crouse-Hinds GUAT 36 CONDULET Conduit Outlet Box 1"
Cooper Crouse-Hinds Ground Fault Circuit Interrupter 125V 20A 2P
Hubbell Twist-Lock Connector Outlet 120/208V 20A
Wiremold Shallow Switch and Receptacle Box
Leviton Receptacle 125V 20A
Hubbell Outlet 15A 125V with Outlet Cover (Suitable For Damp Locations)
Pass & Seymour Flanged Mount Plug 15A 125V with Metal Gang Box
Hubbell Twist-Lock Flanged Inlet Plug 30A 125V
Hubbell Double Outlet 15A 125V with Crouse-Hinds Enclosure, Red Dot Cover
Crouse-Hinds X877128A Receptacle with FDC2 Condulet Box
Appleton EFS150-2023 Receptacle Interlocked with Switch (Connector Broken)
Crouse Hinds AR342 Receptacle 30A 3W 4P 600V Model M54
Crouse-Hinds AR 342 B Arktite Receptacle 600V 30A
Appleton EFS150-2023 Receptacle Interlocked with Switch (Missing Cap)
Wiremold G3027AE Single Receptacle Plate Gray
Crouse-Hinds X877128A Receptacle with FD2 Condulet Box
Hubbell Receptacle 15A 125V with Wiremold G-3043GE Metal Cover
Arrow-Hart Duplex Outlet 15A 125V
Arrow-Hart Single Outlet 125V 15A NEMA 5-15
Arrow-Hart Duplex Outlet, FS2 Enclosure, Tay-Mac Outdoor Cover (Latch Broke)
Hubbell Duplex Outlet 125V 15A with Wiremold G-3043GE Metal Outlet Cover
Hubbell Duplex Outlet 125V 15A, Wiremold G-3043GE Metal Outlet Cover, Cover Bent
Arrow-Hart Duplex Outlet 125V 15A W/ Steel City Metal Outlet Cover
Arrow-Hart Duplex Outlet 125V 15A W / Raco Metal Outlet Cover Square
Eagle Single Outlet 125V 15A
HART-LOCK Receptacle with FD2 Condulet Enclosure and P-5256 Cover Plate
Arrow Hart 2-Gang Receptacle with FS1 Device Box and 16807 Double Door Cover
Crouse-Hinds AR 642 Arktite Receptacle with ARE 36 Outlet Box (Cover Broken Off)
Hubbell Twist-Lock Receptacle with FS1 Device Box and Hubbell P-5256 Cover Plate
Hubbell Twist Lock Connector Outlet 20A 125V
Hubbell P-1660 Twist Lock Plug 10A/250V, 15A/125V W/ Crouse-Hinds FSC1 Enclosure
Hubbell HBL2326 Twist-Lock Flanged AC Outlet 250V 20A (Used)
Crouse-Hinds AR 642 Receptacale with ARE 36 Condulet (With Lockout)
Crouse Hinds AR342 Receptacle 30A 3W 4P 600V
Cooper 5361B Single Receptacle Brown
GE ML-114 Midget Locking Flanged Receptacle Black (Box of 10)
GE 5462-1 Duplex Receptacle 250V 20A Brown (Box of 8)
GE 5251-1 Single Grounding Receptacle 15A 125V Brown
Pass & Seymore 2094-SI GFCI Duplex Receptacle 125V 20A Ivory
Pass & Seymour L520-C Turn & Pull Connector/Receptacle 20A 125V
Killark FCLA Handy Box Duplex Receptacle Cover
Pass & Seymour 7420 Single Receptacle Cover
Hubbell HBL2611 HBL INSULGRIP Twist-Lock Plug 125V 30A (NIB)
Hubbell DRUB15CB5 Utility Box 125V 5A
Intermatic WP1020C Guardian Double Gang Weatherproof Receptacle Cover
Hubbell HBL2351 Locking Plug 600V 20A (Head Only)
Pass & Seymour L520P Locking Plug 125V 20A (Head Only)
Leviton L1520P Locking Plug 250V 20A 3PH (Head Only)
Pass & Seymour L1520-P Turnlok Plug
Pass & Seymour 5362-I Duplex Receptacle
Leviton CR20-I Duplex Receptacle 125V 20A
Leviton 8899-I Smart Lock GFCI Receptacle 125V 20A
Hubbell HBL5252GY HBL Receptacle 125V 15A
Hubbell IG-5651 Single Receptacle 250V 15A
Hubbell HBL2351 Twist-Lock Plug 600V 20A
Hubbell 231A Twist-Lock Plug 120/208V 30A 3PH
GE Locking Plug 250V 20A Yellow
GE Locking Plug 250V 20A
GE Locking Plug 250/600V 10/20A
GE Locking Plug 125/250V 30A
GE Locking Plug 125V 30A
GE Locking Connector Body 125V 30A
GE Locking Plug 125/250V 20A
GE GLD0531 Locking Plug 125V 30A
GE GL0820 Locking Receptacle
GE GE5251-1 Receptacle
Cooper CWL515P Locking Plug 125V 15A
Arrow Hart Locking Plug 250V 15A
Amerace 3753 Receptacle 250/600V 20/30A
Meltric D860A Plug 250V 33-61237
Meltric DS68A Receptacle 250V 33-67237
Thomas & Betts Steel City 58 C 7 Utility Box Cover 4" x 2-1/8" (Box of 25)
Pass & Seymour L630-P Turnlok Plug 250V 30A
Pass & Seymour 8300 Duplex Receptacle 125V 20A
Hubbell 9432C Right Angle Plug 125/250V 30A 3P
Slater L5-30R Medalist Twist-Lock Receptacle 125V 30A
Hubbell HBL2710 Twist-Lock Receptacle
Fusetron SRU Fuse Holder and Receptacle
Arrow-Hart Single Receptacle 125V 15A NEMA 5-15R
56422 Faceplate Kit
Balluff BKS-Z/RKF-4-S4 Receptacle
Hubbell HBL2613 Twist-Lock Connector Body 125V 30A
Woodhead 891L Connector Plug 125V 20A
Hubbell HBL2311S Safety-Shroud Twist-Lock Plug 125V 20A
Hubbell 231A Twist-Lock Plug 125/250V 30A
Hubbell HBL5366C Insulgrip Straight Blade Plug 125V 20A 2P
Midwest U011 Rainproof Power Outlet 120V 20A
Pass & Seymour Legrand 691-I Combination Switch/Receptacle Device
ex WP-1 96136-000 Wall Plate Passive Junction Box
Cooper Crouse-Hinds GFS1 Ground Fault Circuit Interrupter 120V 20A
Cooper Crouse-Hinds ENR5201 Explosion-Proof Straight Blade Receptacle 125V 20A
Wiremold V5748-2 2-Gang Switch and Receptacle Box
Dukane 438-645 1-Gang Rubber Gasket
Wiremold V5748S Shallow Switch and Receptacle Box
Wiremold V5748 Switch and Receptacle Box
Intermatic WP1220C Flexi-Guard Double Gang In-Use Weatherproof Receptacle Cover
Leviton SJ262-SA 2-Gang Decora Plus Device Wallplate
Leviton SJ26-SA 1-Gang Decora Plus Device Wallplate
Leviton SJ26-SA 1-Gang Decora Plus Device Wallplate (Used)
Wiremold G3043BE 3000 Series Raceway Duplex Receptacle Plate
Wiremold 5507B Blank Faceplate (Box of 5)
Wiremold 5507S Spacer (Box of 9)
Wiremold 5507S Spacer (Box of 10)
Leviton Receptacle 125/250V 50A NEMA 10-50R
Pass & Seymour L1020-R Turnlok Receptacle 125/250V 20A 3P
Pass & Seymour L1020-P Turnlok Plug 125/250V 20A 3P
Hubbell HBL2331 Plug 277V 20A
Hubbell ONE 2511 Insulgrip Twist-Lock Plug 120/280V 20A 3PH 4P (NIB)
Hubbell Twist-Lock Connector Outlet 125/250V 20A
B Twist-Lock Connector Outlet 120/208V 20A 3PH
Raco B 103-W Handy Box 4" x 2-1/2" x 1-7/8" (Box of 50)
Walker Parkersburg Textron 501 97590 Service Fitting Receptacle
Meltric Corp. 19-64181 DN20 Receptacle
Walker Parkersburg Textron 803-DGC Service Fitting Receptacle
Walker Parkersburg Textron 501 AL-G 97590 Service Fitting Receptacle
Outlet Face Plate
Electrical Outlet 120V 15A
Leviton Outlet with Redodot Oiltight Enclosure
Double Electrical Outlet 125V 15A
Single Electrical Outlet 125V 15A
Pass & Seymour Plug 15A 125V Male Ended
Arrow Hart F3345 Plug 5-15P 15A 125V Extension Cord End
Pass & Seymour 4720SSAN Right Angle Twist Lock 15A 125V
Marinco 4720 Twist Lock 15A 125V
Appleton FD-2-75 FDE 3/4" Unilet Box
GE GE4310-1 Plug Body Single Tab 125 V 660 Watt Brown
GE GE4182-1 Single Receptacle 20 Amp 250 Volt 2 P 3 W
GE GE4132-2 Flush Dryer Receptacle 3 Pole 3 Wire Black
GE GE4064-1 Single Grounding Outlet 15 A 125 V Brown
GE GLD0221 Dyna-Mate Locking Plug 20 A 250 V 2 P 2 W
GE GLD0513 Dyna-Mate Locking Plug 15 A 125 V 2 P 3 W
GE GLD7572 Dyna-Mate Locking Plug 10/15 A 125/250 V
GE GED0711 Dyna-Mate Straight Plug 15 A 277 V 2 P 3 W
GE GED0711 Dyna-Mate 10 Straight Plugs 15 A 277 V 2P 3W
GE GE5261-1 Single Ground Receptacle 15 A 125V 2 P 3 W
GE GE5261-1 Single Ground 10 Receptacles 15A 125V 2P 3W
GE GE5261-9 Single Ground Receptacle 15 A 125 V 2P 3W
GE GL7310 Single Locking Receptacle 20 A 125/250 V 3P
GE GE4124-1 3 Wire Sngle Outlet 20 A 250 V Brown
GE GE4124-1 3 Wire Sngle Outlet 20 Amp 250 Volt Brown
GE GE4124-1 3 Wire 10 Single Outlets 20A 250 Volt Brown
GE GE4333-5 Connector 3 Wire 10/15 Amp 125/250 Volt
Leviton 2311 Locking Plug 20 A 125 V 2 P 3 W Black
Bryant 8430-FR Single Flush Receptacle 30 A 250 V 3 PH
Hubbell HBL5366C Straight Plug 20 Amp 125 Volt 2P 3W
Pass & Seymour TPJ1 Wall Plate Oversize 1 Gang/Toggle
20 Pass & Seymour TPJ1 Wall Plate Oversize Gang/Toggle
20 Pass & Seymour TP18-I Wall Plate 2 Gang 1 Duplex/Tog
Pass & Seymour TP8-I Wall Plate 1 Gang 1 Duplex Ivory
Pass & Seymour PSSB2-OW DataCom Surface Box 2 Port
Pass & Seymour 5651 Single Receptacle 15 A 250 V Brown
Pass & Seymour CR20-I Duplex Receptacle 20 Amp 125 Volt
Pass & Seymour 3804 Power Outlet 50 A 250 V Flush Mount
Pass & Seymour L820-C Turnlok Connector 20 Amp 480 Volt
Pass & Seymour 4700 Turnlok Receptacle 15 Amp 125 Volt
Pass & Seymour 6810 Single Receptacle 20 A 125/250 Volt
Pass & Seymour 8200-ILRED LED Receptacle 15 A 125 V
