3500/15本特利3500/153500/15本特利3500/15
编程需要有缜密的逻辑思维
编程本身就是一种逻辑思维过程。在高级语言中，使用zui多的是if then else、select这些条件判别语句，这就是逻辑中的因果关系。PLC程序就是由这些因果关系组成的：判别条件是否成立，进而决定执行相应的指令。zui初的PLC是用来替代继电器逻辑电路的，所以继承了继电器电路以触点作为触发条件的描述方式。在PLC中，以虚拟触点代替了继电器的金属触点，而继电器电路所表达的逻辑关系还是被完整的保留下来。
郑娟萍
厦门仲鑫航自动化设备有限公司
即使引入了继电器电路难以胜任的数值处理过程，PLC从根本上还是在执行一个个因果关系。所以，理顺对象的各个事件之间的逻辑关系，是编程之前必须精心做好的准备工作。我在接到一项任务后，*件事就是整理出一份逻辑关系图，与用户反复商讨，取得用户的认可，然后才真正进入程序的编写过程。
Honeywell Micro Switch GLAA01E7B Limit Switch
Micro Switch 4LS1 Precision Limit Switch 600V 10A
Automation Direct ABM2E92Z11 Limit Switch
Micro Switch 2DM409 Snap Action Basic Switch
Micro Switch YA-3R64-A2 Snap Action Basic Switch (Missing Screw)
Westinghouse NP28080-E Voltmeter Switch 600V 20A
Westinghouse NP28894-G Ammeter Switch 600V 20A
Westinghouse 100P264H01 Circuit Breaker Control Switch 600V 20A
GE THMS31 QMR Switch 3P MR-30 Mod. 2
Neilsen-Kuljian D150-1A-NL Current-Operated Switch 30 VDC 0.15A
Allen Bradley 800T-FC16F Maintained Contact Push Button Unit
Honeywell L404A1354 Pressuretrol Pressure Switch
Micro Switch BZLN-2-RH Snap Switch 250V 15A 1/4HP
Micro Switch AS452A39 Mercury Switch
GE CR2940AB402PH Control Selector Switch and Pilot Light in Enclosure
GE Pushbutton Square Green with P9B10VN (White Stripe)
GE Selector Switch with P9B10VN (Missing Colored Knob Cover)
GE Emergency Stop Pushbutton with P9B01VN
emecanique GS1 EERU 30 General Purpose Switch 600V 30A 3PH
Allen Bradley 800T-N18 Locking Attachment for Extended Head
Micro Switch BZ-3R155557T Switch
Allen Bradley Selector Switch Set W/ 800MR-H33B / 800MR-H31B / 800MR-H48B / Key
Mercoid PRL-153-P1 Differential Pressure Switch
Siebe Environmental Controls PC 110 Pressure Switch
Allen Bradley 802T-N2 Lamp and Cover Kit for Neutral Position Switch Unit
Allen Bradley 802T-N1 Lamp and Cover Kit for Standard Switch Unit
Allen Bradley 800T-2TA Oiltight Start-Stop Surface Mounting Pushbutton
Johnson Controls Penn P67CA-1 Pressure Switch
Hammond Manufacturing 1437A Pushbutton Enclosure
Square D 9001KY2 2-Unit Pushbutton Enclosure
Omron ZE-N22-2S Limit Switch 480V 15A
Square D 9007-CT-52 Limit Switch Receptacle
Square D 9001-TR-11 Pushbutton Operator
Square D 9007-AA-1S Lever Arm
Square D 9007-AA-2 Lever Arm
Carrier HH12HB-126 Switch
Honeywell L4079A 1035 3 Pressure Switch
Honeywell L411A1029 Pressure Switch
Johnson Controls Penn P70AB-12 Pressure Switch
Gems Sensors GEMS #FS-380 BR 2.0 GPM Flow Switch
Allen Bradley 194R-NN030P3 Disconnect Switch 600V 30A 3PH (With Switch Arm)
Allen Bradley 194R-NN030P3 Disconnect Switch 600V 30A 3PH (Base Only)
Omron A3G3-6011-3 Push Button Green
Omron A3G-3011
Allen Bradley Z-26693 Operating Head Complete with Lever
Allen Bradley 800T-A2A Flush Head Pushbutton Black (Used)
Allen Bradley Z-16070 Lever Type Head
Atlas B10M4-PHB High Bay Housing 1000 Watt 480 Volt
Square D 9001KN299WP Pushbutton Legend Plate White 10 in Box
Square D 9001KN244WP Pushbutton Legend Plate White Box of 2
Square D 9421V2W30 Control Station Enclosure Assembly
Square D 9001KYSK111 1-Unit Control Station
emecanique ZCK-E21 Limit Switch Roller Lever
emecanique ZCK-D15 Limit Switch Head
Allen Bradley 700-N2 Right Hand Auxiliary Contact
Rittal Electromate E2PBGM Enclosure (NIB)
Midwest Flex C-FS-06 Data Send Switch
Square D 9001SKR8RH25 Mushroom Pushbutton Red
Square D 9001KR131 Pushbutton with Lock (NIB)
Square D 9001KY3 3-Unit Enclosure
Microswitch BA-2RV22-A2 Limit Switch
Allen Bradley 1497-D-BASX-3-N Transformer
Allen Bradley 800T-XD1 Contact Block 600V Series C
Allen Bradley 800T-XD2 Contact Block 600V Series C
Allen Bradley 800T-XD6 Contact Block 600V Series B
Allen Bradley 800H-DP6A Pushbutton Red (Broken Contact Block)
Allen Bradley 800T-QB24A Illuminated Pushbutton Amber
Allen Bradley 800T-PA26 Illuminated Pushbutton Red
Allen Bradley 800T-J5A 3-Position Selector Switch Black
Allen Bradley 800H-HK2A 2-Position Selector Switch
Allen Bradley 800 DK1B Mushroom Pushbutton (no contact block)
Allen Bradley 800T-AK2B Flush Head Pushbutton Black
Allen Bradley 800T-XA4R Contact Block 150V Series A
Allen Bradley 800H-H2C 2-Position Selector Switch Black
Allen Bradley 800T-FX1A1 2-Position Push-Pull Button
Square D 2510KG1 Motor Starting Switch
Metal Limit Switch Arm 9"
Crouse Hinds EDS 1184 Explosion Proof Pushbutton Red
Turck NI4-M12-AP6X-H1141 Quick Connect Proximity Switch
UND Lab Inc. Toggle Switch
Button
Allen Bradley 802T-CW Oiltight Limit Switch
Pushbutton Green
Pushbutton Red
GE Pushbutton Black with P9B10VN
Cutler-Hammer Pushbutton Red
Allen Bradley Push-Pull Button Red with 800E-3D0
Conntrol 862-1000-00 Foot Switch
Barksdale D1H-H18 Pressure Switch
Microswitch JS-220 Basic Subminiature Switch with Cable
Selector Switch Black with (2) Contact Blocks
MSKTT-021 Control Knob
Balluff BES-516-3007-E5-C-S49 Proximity Switch
GE Twist-Lock Pushbutton Red with (2) CR104P
GE Twist-Lock Pushbutton Red with (2) P9B01VN
Allen Bradley Selector Switch Black with 800E-2X01V
Square D Selector Switch Black with 9001KA2
emecanique Pushbutton Red with (2) ZB2.R
GE Selector Switch Green with (2) P9B10VN
AMP 435986-1 Rotary Switch Black
GE Selector Switch Green with P9B10VN
Honeywell Microswitch V3L-2905 Basic Switch
GE Key Selector Switch Black with P9B10VN
GE 448 Pushbutton Red Box of 2
GE 243B10442 Twist-Lock Pushbutton Red Box of 2
Stahlin CF 2 PB Enclosure
Carlon E987R Fiberglass Enclosure with Controls
emecanique PushButton Red Mushroom Head in enclosure
Allen Bradley 800T-J91 Selector Switch with 800T-XA No Top
Kilo DD-90-4-5 Knob
Allen Bradley 800T-Q24 Pilot Light Red
Allen Bradley 800T-X504 Emergency Stop Legend Plate
Allen Bradley 800T-B6 Pushbutton Red W/ 800T-XD2
Allen Bradley 800T-B Pushbutton Red W/ 800T-XD2
Allen Bradley 800T-B Pushbutton Grey W/ 800T-XA
Allen Bradley 800T-B Pushbutton Green with (2) 800T-XD1
Allen Bradley 800T-B Pushbutton Black W/ 800T-XD1
Allen Bradley 800T-A2 Pushbutton Black W/ 800T-XA
Allen Bradley 800T-A2 Pushbutton Black Ser N W/ 800T-XA
Allen Bradley 800T-A1 Pushbutton Green with 800T-XD1
Allen Bradley 800T-A Pushbutton Green W/ 800T-XD1
Allen Bradley 800T-A Pushbutton Green Series T with 800T-XA
Allen Bradley 800T-A Pushbutton Black W/ 800T-XD1
Allen Bradley 800T-A Pushbutton Black W/ 800T-XA
Allen Bradley 800EM-HM32C1 Maintained Selector Switch
Allen Bradley 800EM-F2 Flush Pushbutton Black
Allen Bradley 800E-3X01 Contact Block Used
Allen Bradley 800T-PS16 Pilot Light Red
Allen Bradley 800T-QB10 Illum Pushbutton Red W/ 800T-XA
Allen Bradley 800T-QBH10A Illum Button Orange W/800T-XA
Allen Bradley 800T-QBH10A Illum Button Blue W/ 800T-XA
Allen Bradley 800T-Q10 Pilot Light Red Series A
Allen Bradley 800T-PT16 Illum Pushbutton Red W/ 800T-XA
Allen Bradley 800T-PT16 IllumButton Red Ser N W/800T-XA
Allen Bradley 800T-PT16 Button Red Bubble with X-208238
Allen Bradley 800T-PRT16 Illum Button White W/ 800T-XA
Allen Bradley 800T-PB16 Pushbutton Green W/ Transformer
Allen Bradley 800T-PA16 Illum Button Orange W/ 800T-XA
Allen Bradley 800T-PA16 Illum Button Green W/ 800T-XA
Allen Bradley 800T-P16 Pilot Light Red with Transformer
Allen Bradley 800T-P16 Pilot Light Orange Ser N W/Trans
Allen Bradley 800T-P16 Pilot Light Orange Ser B W/Trans
Allen Bradley 800T-P16 Pilot Light Green W/ Transformer
Allen Bradley 800T-P16 Pilot Light Green Ser N W/Trans
Allen Bradley 800T-P16 Pilot Light Blue W/ Transformer
Allen Bradley 800T-H2A Selector Switch
Allen Bradley 800T-H2 Selector Switch with 800T-XD1
Allen Bradley 800T-H2 Selector Switch with 800T-XA2
Allen Bradley 800T-H2 Selector Switch with 800T-XA1
Allen Bradley 800T-H2 Selector Switch with (2) 800T-XA Series D
Allen Bradley 800T-H2 Selector Switch Ser N W/ 800T-XA
Allen Bradley 800T-H17 Selector Switch with 800T-XA
Allen Bradley 800T-FXPH16RA1 Button Red with 800T-XA1
Allen Bradley 800T-FXP16 A1 Button Orange with 800T-XA1
Allen Bradley 800T-FXNQ10BA Illum Button Blue with 800T-XA7
Allen Bradley 800T-D Pushbutton Red W/ 800T-XD2
Allen Bradley 800T-D Pushbutton Red with 800T-XA
Allen Bradley 800T-D Pushbutton Black with 800T-XD1
Allen Bradley 800T-D Pushbutton Black W/ 800T-XD2
Allen Bradley 800T-B6A Pushbutton Red W/ CB
Allen Bradley 800T-16JR20KB7AX Switch Red with 800T-XA
Allen Bradley 800T-16HR17KB6AZ Switch Red with 800T-XA
Allen Bradley 800T-16HR17KB6AX Switch Red W/ 800T-XA
Allen Bradley 800T-16HR17KB6AX Selector Switch Red NIB
Allen Bradley 800E-2DL5 Full Voltage Module with Latch
SOR Inc. 5RB-M3-M4-F1A Static "O" Ring Pressure Switch
Chem-Tec LPH-375-BC Flow Switch
Generic Automation 56778 Limit Switch
Johnson Controls C-2220-13 Hgh/Low Press Selector (NNB)
Penn P74FA-1 Pressure Switch
Penn P74EA-1 Pressure Switch
Penn P74DA-10 Pressure Switch
Penn P74BA-8 Pressure Switch
MCC Powers 141-0518 Air Flow Switch (NIB)
Electro Cam EC-3008-10-ADO Double Ended Cam Switch
Square D 9007C54D Limit Switch
Micro Switch LSYPC1A Heavy Duty Limit Switch
Johnson Controls C-2220-13 High/Low Pressure Selector
Square D 9001 KY-1 Pushbutton Enclosure
Rosemount 1403-1 Adjustable Pressure Switch
Square D AB-43 Limit Switch
GE CR104PBG91R1 Oiltight Pushbutton Red
GE CR104P Series Pushbutton Red
idec HW1E-BV Twist Push Button Red
emecanique ZB2-BE102 Contact Block
Allen Bradley 800T-FXT Red Emergency Pushbutton W/ 2 CB
Legrand 21501 Switch
Dwyer 1823-40 Pressure Switch
emecanique 507 R.B. Denison Lox-Switch
IMO L2H-H202 Barksdale Temperature Switch
IMO 2AG11T-12C-01SW Barksdale Sld State Pressure Switch
Honeywell P643A 1007 Pressuretrol Controller
Honeywell C645C 1038 Industrial Pressure Switch
Allen Bradley 440K-T11131 Trojan 5 Sfty Swtch W/ Latch
Allen Bradley 440K-T11132 Trojan 5 Sfty Swtch W/ Latch
Transamerica Delaval T2H-H153S Barksdale Temp Switch
Namco Controls EA08013100 Snap-Lock Limit Switch
Dwyer 3002 Photohelic Pressure Switch/Gage Series 3000
emecanique ZCK-E67 Limit Switch Head With Roller
Square D 9001K68 Mushroom Button Guard
Square D 9001-KR5R05H6 Pushbutton
GE P9SPN0S Standard Pushbutton
GE P9SPN0G Standard Pushbutton
GE P9SPLOGO Standard Illuminated Pushbutton
GE P9SPL0S0 Standard Pushbutton
Allen Bradley 800T-B1A Push Button Extended Head Green
Square D AW12-BA1 Limit Switch Class 9007 Series C
Square D 79423 Lever Arm BA-1
Square D 87912 Lever Arm CA-4
Square D 79432 Lever Arm CA-1
Allen Bradley 802T R2TD Time Delay Limit Switch Ser 1
Allen Bradley 836T-T252JX15 Pressure Switch 14 Bar
emecanique XCKJ59 Safety Interlock 3 Amp 240 Volt AC
emecanique XCKJ59 Safety Interlock 3 Amp 240 Volt
Pass & Seymour 15AC3-I Three Way Switch 15 A 120/277 V
10 Cooper 1301-7B-Box Brown Switch 1 P Ground 15A 120V
Cutler Hammer E30AL Push Button Compact 2 Pos Maint
Joslyn Clark 5A10N Pushbutton Oil Tight Snap Action
Furnas 52PX2W2A Push Button Red 2 Pos Maint 1NC 4X
Square D 9001KS11K1 Selector Switch 2 Position Key Main
Square D 9001KA3 Fingersafe Contact Block 1NC Ser H
Square D 9001KR1U Push Button 30mm Universal Colors
Square D 9001KS34 Selector Switch 2 Position 30mm Black
Square D 9001SKS402B Selector Switch Operator 30 mm
Square D 9001SKS402B Selector Switch Operator 30 mm
Allen Bradley 800H-FRXT9A1 Push Button Yellow 4,4x,13
GE CR104RBG01R1 Push Button Red Flush Mount 1 NC
Bryant 30103 Motor Starting Switch 30 Amp 600 Volt
GE CR2943NA101E Start Button Station 600 V
Cutler Hammer 10250T-N12 Oil Tight Enclosure 2 Element
Allen Bradley 801-CMC21 Limit Switch 1.2 Amp 600 Volt
MicroSwitch 1LS1 Limit Switch 10 Amp Oil Tight 600 Volt
MicroSwitch BZE6-2RQ 9824 Limit Switch 15 Amp
MicroSwitch BZE6-2RN 9937 Limit Switch 15 Amp
MicroSwitch BZE6-2RQ 0138 Limit Switch 15 A Side Mount
Killark FXS-1C 1 Pole Hazardous Location Tumbler Switch
Cutler Hammer Orange Push Button head
Cutler Hammer 07827876 Contact Block C-H 30mm (NIB)
Carling MA2-B-24-610-1-A26-7-D On/Off Switch 10 A 250 V
Square D 9001KS63FBH13 Selector Switch W/1 CB no knob
Lot of 2 Selector Switches and 2 Push Buttons
Allen Bradley 800T-J4 Selector Switch W/1 CB
Allen Bradley 800T-H2 Selector Switch W/2 CB Series A
Square D 9001KS63FBH13 Selector Switch W/1 CB no knob
Square D 9001KS63FBH13 Selector Switch W/1 CB (NIB)
Servalite 600CU Toggle Switch 3/4 HP
Cutler Hammer C4103 Contact Block (NIB)
Cutler Hammer C3603 Contact Block (NIB)
Arrow Hart 7465N Midget locking plug 15Amps 25V
Square D 9001KS63FBH13 W/1 CB no knob, no box
Square D 9001 KM1 Red Pilot Light
Allen Bradley 800T-P16 White Pilot Light W/1 CB
Allen Bradley 800T-B Red Push Button
Allen Bradley 800T-A Yellow Push Button W/1 CB
Allen Bradley 800T-A Yellow Push Button
Allen Bradley 800T-A Black Button W/2 CB
Allen Bradley 800H-BR F Red Push Button W/1 CB
Allen Bradley 800H-AR F Green Push Button W/1 CB
Allen Bradley 800H-AR F Yellow Push Button W/1 CB
Allen Bradley 800H-AR F Black Push Button W/2 CB
Red Push Button
Allen Bradley Selector Switch Cylinder Lock 800T-H33
Allen Bradley Selector Switch Cylinder Lock 800T-J44KD7
Allen Bradley Selector Switch 800H-HR2
Allen Bradley Selector Switch 800T-J91KQ1
Allen Bradley Selector Switch 800T-J17KC7
Allen Bradley Illuminated Push Button 800T-QT10
Allen Bradley Illum Push Button 800T-FXQ24 A1 W/3 CB
Allen Bradley Illum Push Button 800T-FXQ24 A1
Allen Bradley Illuminated Push Button 800T-PM16
Allen Bradley Selector Switch 800T-J2KU7
Allen Bradley Push/Pull Emerg Stop Button 800T-FRXTA1
Allen Bradley Illuminated Push Button 800T-FXPF16 A1
Allen Bradley Illuminated Push Button 800T-FXPF16 RA1
Cutler Hammer Selector Switch 1089
