57310001-CC/DSPC-CC/DSPC-CC/DSPC171

 PLC的外部設(shè)備主要是指控制系統(tǒng)中的輸入輸出設(shè)備，其中輸人設(shè)備是對系統(tǒng)發(fā)出各種控制信號的主令電器，在編寫控制程序時必須注意外部輸入設(shè)備使用的是常開還是常閉觸點(diǎn)，并以此為基礎(chǔ)進(jìn)行程序編制。否則易出現(xiàn)控制錯誤。

在PLC內(nèi)部存儲器中有于輸入狀態(tài)存儲的輸入繼電器區(qū)，各輸入設(shè)備（開關(guān)、按鈕、行程開關(guān)或傳感器信號）的狀態(tài)經(jīng)由輸入接口電路存儲在該區(qū)域內(nèi)，每個輸入繼電器可存儲一個輸入設(shè)備狀態(tài)。PLC中使用的"繼電器"并非實(shí)體繼電器，而是"軟繼電器"，可提供無數(shù)個常開、常閉觸點(diǎn)用于編程。每個"軟繼電器"僅對應(yīng)PLC存儲單元中的一位（bit），該位狀態(tài)為"1"，表示該"軟繼電器線圈"通電，則程序中所有該繼電器的觸點(diǎn)都動作。輸入繼電器作為PLC接收外部主令信號的器件，通過接線與外部輸入設(shè)備相，其"線圈"狀態(tài)只能由外部輸入信號驅(qū)動。

鄭娟萍

廈門仲鑫航自動化設(shè)備有限公司 

 PLC的各種功能主要是通過運(yùn)行控制程序來實(shí)現(xiàn)。編制程序時，需要合理使用PLC提供的編程元件（即軟元件）。FPO型PLC中常用的編程元件有兩種：位元件（bit）和字元件（word）。位元件實(shí)際上是PLC內(nèi)存區(qū)域所提供的一個二進(jìn)制位單元，又被稱為軟繼電器，主要用作基本順序指令的編程元件，如輸入繼電器Xn、輸出繼電器Yn、內(nèi)部通用繼電器Rn、定時（計數(shù)）器等，其參與控制的方式主要是通過對應(yīng)觸點(diǎn)的通斷狀態(tài)改變影響邏輯運(yùn)算結(jié)果即輸出。

    字元件則為PLC內(nèi)存區(qū)域內(nèi)的一個字單元（16bit），主要用作功能指令和高級指令的編程元件，通常用以存放數(shù)據(jù)，如數(shù)據(jù)寄存器DTn，定時(計數(shù))器的設(shè)定值SVn、經(jīng)過值EVn等。字元件沒有觸點(diǎn)，通常以整體內(nèi)容參與控制。

SQUARE D STAINLESS HIGH LOW STOP PUSHBUTTON 9001KYSS304 9001 KY-SS304 NEW

ALLEN BRADLEY 800T-H2 8800T-J2KC7B SERIES T 3 POSITION SELECTOR SWITCH  NEW 

Rafi 1.20 113 Pushbottom 250V 10A 120113 30V 2 W New

HYSTER 0176409 176409 SWITCH NEW

P&H PARTS 100E2397-2 100E23972 SINGLE SPEED PUSH BUTTON NEW  

NEW ALLEN BRADLEY SELECTOR SWITCH 800T-J91AP 800TJ91AP SER T TYPE 4,13

NEW ALLEN BRADLEY 800T-N17KG4B SELECTOR SWITCH  SER T 800T-N17KG4

CAT SOLAR E138180-100 E138180100 FUEL CONTROL CONTROLLER W/ 19580-40 FUEL FILTER

(10) Honeywell BZ-2R710-PC2 Micro Switch BZ2R710PC2

NEW EMECANIQUE XBF-Z15 SELECTOR SWITCH XBF-Z21 XBF-Z22

(LOT OF 2) EMECANIQUE ZB5AA2 ZB5-AA2 PUSHBUTTON NEW 

(LOT OF 4) IDEC ASWHHY-RPN02 ASWHHY RPN02 RED SELECTOR SWITCH KNOBS NEW

SIEMENS RELAY 3RN1010-1CG00 110-120Vac  3RN10101CG00

SQUARE D MG27121 AUXILIARY SWITCH FOR NC100H 6A 6 AMPS A 89235 NIB

Allen Bradley Illum Extended Pushbutton Clear 800EM-LE7

Junior Super Single Pump Switch 8JSD1WP 120 VAC 1PH 1/2 HP 40A 40 A Amp Used

NEW KLOCKNER MOELLER PLUNGER SWITCH AT 11 a-1-i AT11a1i 600v

KRAUS & NAIMER 2 POSITION CONTROL SWITCH D10A A320 D10AA320 10 AMP A 10A 600VAC 

NEW PARKER ELECTRICAL INDICATOR CONNECTOR 929596 NN 929596NN 

NEW ROSS SOLENOID VALVE PALM BUTTON 1223B2001 0.3-10 BAR

New Allen Bradley Pilot Light Green 800EM-P3 800EMP3 A

RITTAL FUSE SWITCH DISCONNECT SV 3488.00 SV348800 690V 60HZ 12W 160A 160 A AMP

NEW SQUARE D START PUSH BUTTON STATION 9001BG101 SER A 

NOS MOELLER START EMERGENCY STOP RESET PUSHBUTTON PUSH BUTTON CONTROL STATION

Square D 4-Hole Start/Stop/On Surface Mount Enclosure 9001 DTYN-4 DTYN4 New

Square D Selector Switch 9001 TS1K2 9001TS1K2 A NQ1101

CUTLER-HAMMER GREEN OPERATOR FLUSH PUSHBUTTON E22MPG NIB

BUERSTENRAD PSP-ELEMENT A70405151 A70405151.58.860 NEW

ALLEN BRADLEY 800EP-HL31 800EPHL31 SERIES A SPRING RETURN SELECTOR SWITCH NEW  

Square D Selector Switch 9001KXSDC 9001 KXSDC New

NEW SPRECHER & SCHUH D7M-E3 GREEN PUSH BUTTON 7M043 D7ME3

Crisplant Switch with Key 932331 CI-T0 NEW

Allen Bradley Optic Pilot Light 800EM-PL1 White Lot 2

NEW SPRECHER & SCHUH 7M062MX10 MUSHROOM PUSHBUTTON W/ CONTACT BLOCK D7M-MM42MX10

IDEC MC MC2D-M20B MC2D-M 12511K, 12131K PUSHBUTTON NEW

NEW ALLEN BRADLEY 800T-N2KK4B SELECTOR SWITCH SER T BULL 800T 800T-N2KK4

EMECANIQUE ZB4 BW653 066662 AMBER ELECTRIC PUSH BUTTON NEW  

(LOT OF 5) MEYN AMERICA LLC / MOELLER 06.02.004.205 0602004205 PUSH BUTTON NEW 

Cutler Hammer Plastic Lens 10250TC19N Series A1 Lot of 3 New

NEW SPRECHER & SCHUH 7M013MX10 GREEN PUSHBUTTON WITH CONTACT BLOCK D7M-F3MX10

NEW GE GENERAL ELECTRIC PUSH BUTTON CR 2940AA402M CR2940AA402M 600V MAX

NEW GENERAL ELECTRIC LAMP BULB HOLDER  ALF 475-02 ALF47502 660W 1000V

NEW GE C-2000 LEVER SELECTOR SWITCH P9CSVW0N 90395  MAINTAINED 5 POSITION 

NEW EMECANIQUE SELECTOR SWITCH ZB2-BD2 ZB2BD2 

CUTLER HAMMER 10250T563C53-51 10250T563C5351 SER A2 2 POS RED EMERGENCY STOP NEW

Allen Bradley 800HPP46G Pilot Light 800H-PP46*

NEW ALLEN BRADLEY LOT OF 2 ILLUMINATED PUSHBUTTON 800E-LE3 800ELE3 SER A

Square D Selector Switch w/o Knob 9001 SKS 88 9001SKS88 Series K New

NEW ALLEN BRADLEY LOT OF 2 ILLUMINATED PUSHBUTTON 800E-LE3 800ELE3 SER A

Square D Selector Switch w/o Knob 9001 SKS 88 9001SKS88 Series K New

CUTLER HAMMER E34EB2-1X E34EB21X LONG BUTTON-RED PUSHBUTTON 

GENERAL ELECTRIC PUSHBUTTON CR2940AA401A 2940AA401A NEW

ENTRELEC ROTARY SWITCH SWI-0131A VY80+VY20/S/32617D I-80 660V 80A 6 NIB

GE Start-Stop Push Button Kit CR205X12ON for use with CR205-208 Nema Size 00-1 

New Allen Bradley Voltage Module w/ Latch 800E-2DL0X20

NEW CUTLER HAMMER PUSHBUTTON OPERATOR W/ LIGHT E30JG

New Dialco Pushbutton Switch 513-0301-604 5130301604

ALLEN BRADLEY ILLUM PUSH BUTTON 800T-PB16XA14 SER T NEW

GE General Electric White Pilot Light CR104C232 115 Volt New in Box

LAFERT AMH132STA2 30114641 0002 H 10HP 10 HP 230/460V 3PH ELECTRIC MOTOR NEW

(LOT OF 10) ALCO TPF11 0.4VA SUBMIN PUSHBUTTON SWITCH NEW

(LOT OF 3) US SALES LBKBACO RED PUSH BUTTON NEW 

HYSTER 369334 RED HORN SWITCH NEW

NEW EATON PADLOCK PUSHBUTTON LOCK 10250TA38

PACK OF 100 KOA Metal Oxide Resistors RSF1B J 681 680 RSF1BJ NEW

New Cutler Hammer Std. Ind. Light 10250T206 24V 

NEW PNEUMADYNE PUSH BUTTON A0-31-3-3 A03133

SQUARE D 9001 K-3 K3 SER A MECHANICAL INTERLOCK PUSH BUTTON NEW

ENTRELEC ROTARY SWITCH SWI-0134A VY80+VY20/S/32615B/SWI-0134A 600 VAC 80 A NIB

NEW EMECANIQUE XB4BW35G5 YELLOW PUSH BUTTON 

Square D Pushbutton 9001 KXRB1R 9001KXRB1R Red Lens New

NEW SQUARE D 9001BG223 HAND AND AUTO CONTROL STATION 

EATON / CUTLER HAMMER 10250T102-2 10250T1022 NON-ILLUMINATED PUSH BUTTON NEW  

NEW BARKSDALE IMO PRESSURE VACUUM SWITCH DPD1T-A3 SS DPD1TA3SS .03-3 PSI 10 PSI 

New Total Source Switch Kit N0I40/00 3012821 034600

NEW SQUARE D PUSH BUTTON OPERATOR SWITCH 9001KXRG1GGR 9001KM1 

LINCOLN 82663 CENTRO-MATIC GREASE LUBRICANT RAM PUMP SERIES H 31:1 RATIO

HONEYWELL MICROSWITCH CONNECTOR SDS-C2SUB-4 SDSC2SUB4

Square D Pilot Light KM35LR 24-28V Ser. H

Square D Pushbutton 9001 SK2L35LH13 9001SK2L35LH13 New

GE GENERAL ELECTRIC HEAVY DUTY START STOP PUSHBUTTON STATION CR2940NA403C NIB

ENTRELEC ROTARY SWITCH SWI-0125A VY80/S/32950// 600 V 80A 80 A AMP 3 PH NIB

Crouse-Hinds Explosive Explosion Proof Select Switch EDSC21272 3/4" NPT 600V New

Allen Bradley Square Selector Switch 800MS-H31BLAK 

NEW EFECTOR PROXIMITY SWITCH DIA 12 313A191F 

Allen Bradley Green Push Button Accessory 800T-N246G Series A New

NEW CEMA 077SCZ22RC03 SELECTOR SWITCH W/ KEY SER 077

NEW SIEMENS 52SA3Q1 OIL TIGHT SELECTOR PUSH BUTTON SWITCH TYPE 1,3,4,12,13

NEW ALLEN BRADLEY FLUSH HEAD PUSHBUTTON 800MR-A1 800MRA1 SER A 

ALLEN BRADLEY AMBER PUSH BUTTON 800H-QRAH10A New in Box

EMECANIQUE ZB5-AW313 ZB5AW313 PUSH BUTTON SWITCH NEW

ALLEN BRADLEY 800T-H33C 800TH33C 2 POS CYLINDER LOCK W/KEY SELECTOR SWITCH NEW  

NEW NO NAME SENSOR SWITCH 1010566A

DIALCO DIALIGHT YELLOW PUSH BUTTON SWITCH PANEL LIGHT 913-1606 913-1606-1633-525

HIRSCHMANN VM5-C.0 VM5C.0 W/12-B-GDM 12BGDM 10A CLOGGING INDICATOR SWITCH NEW

FLEXONICS EXPANSION JOINT 205735 3" DIA 16 3/4" LENGTH STAINLESS SS NEW

Allen Bradley Pushbutton 800T-FXTQ10RD4 Series T 120VAC 120 V Volt New

Allen Bradley Pushbutton 800H-BK6B 800HBK6B Series B New

No Name Cast Steel Spring Stop Mushroom Button VLIER DS-2 New

Rees Pushbutton Operator w/ Padlock Attachment 40102-002 Missing Button Top

ALLEN BRADLEY 800T-JG16 800TJG16 SERIES T SELECTOR SWITCH NEW

Square D Pushbutton 9001 SKR3BH5 9001SKR3BH5 New

NEW ALLEN BRADLEY SELECTOR SWITCH 800T-J91KT1B 800TJ91KT1B SER T TYPE 4,13

NEW ALLEN BRADLEY 800T-16JA5KB7AX SELECTOR SWITCH / AMBER 120V BULL 800T SER T 

P/R SWITCH 4 POSITION SWITCH S-104-S 100A 100 A AMP 600VAC 600 VAC 60HZ

NEW NO NAME V5/54101010 MUSHROOM HEAD PUSH BUTTON / RED V554101010

KRAUS NAIMER ROTARY SWITCH KG 161 KG161  3 PH 200 A AMP 600 VAC NEW 

NEW EMECANIQUE BLACK MUSHROOM PUSH BUTTON SWITCH ZB4BT2 

WESTINGHOUSE OT1A1 OIL TIGHT BLACK PUSH BUTTON NEW  

Square D Pushbutton 9001 KXRB1L 9001KXRB1L New

New Turn-Act AC/DC Reed Proximity Switch GRR-25 GRR25 

Square D Pilot Light 9001 KXPA108 120 V Volt VAC New

BDC ELECTRONIC DCA5/4609 DCA5 4609 PROXIMITY SWITCH NEW

NEW GE ROTARY SWITCH 16SB1CG29X2 TYPE SB-1 W/O HANDLE

NEW LOT OF 2 CUTLER HAMMER 10250TC6N NEW TYPE WHITE PLASTIC LENS COVER

NEW ALLEN BRADLEY 800T-KD1AAXX PUSH BUTTON SELECTOR / GREEN SER T BULL 800T 

(LOT OF 3) US SALES LBKBACO GREEN PUSH BUTTON NEW 

New Allen Bradley Voltage Module w/ Latch 800E-2DL0X11

emecanique Selector Switch Replacement D3G3S New

ELECTRO SWITCH ELECTROSWITCH VOLTMETER 2405C SER 24 3 PHASE 3 PH 

Allen Bradley Sel Switch 800T-J2KA1 No Knob or Contact

NEW FURNAS 52PA6E3WJK OIL TIGHT PUSH BUTTON-GREEN 120V

NEW EMECANIQUE XB2MA501 YELLOW PUSH BUTTON XB2 MA501

NEW AMETEK GAUGE P500 140671 0-300 PSI 0-2000 KPA 2-1/2" FACE 1/8" NPT 

NEW G.I. 3W720 8536 PUSHBUTTON S83010 LOT OF 15

NEW GENERAL ELECTRIC SELECTOR SWITCH CR104B122 SER A 2 POS 150V 

NEW GE C-2000 LEVER SELECTOR SWITCH P9CSVE3N 90388 MAINTAINED 3 POSITION 

EMECANIQUE ZA2BW33 64840 GREEN OPERATOR FLUSH BUTTON

GE GENERAL ELECTRIC MAINTAINED 2 POSITION RED PUSH BUTTON CR104PTY209300 

NEW WESTINGHOUSE CONTROLS ELECTRICAL RESET W/TRIP INDICATOR WRSKL72

NEW SQUARE D 9001KS54FB SELECTOR SWITCH 

NEW ALLEN BRADLEY SELECTOR PUSH BUTTON SWITCH 800T-KD1AAXX 800TKD1AAXX SER T

NEW SIEMENS KABELVERTEILER F. CENTRAL SERVICE BOARD 6FX2006-1BA02 6FX20061BA02

GE GENERAL ELECTRIC CR104PXF12 MODIFICATION KIT LATCH FOR 2 PUSHBUTTON NEW

AUTOMATION DIRECT PUSH BUTTON FLUSH CLEAR ILLUMINATED GCX1205-24L GCX120524L NIB

NEW ALLEN BRADLEY PUSH BUTTON SWITCH 800T-KE1 880TKE1 SER T 

ENTRELEC ROTARY SWITCH VY40 S7024152 REV01 30414815 600 V 40 A NIB

NEW DIALCO PUSHBUTTON W/O LAMP 513-0301-604 5130301604 3A 3 A AMP 125 VAC

NEW GE GENERAL ELECTRIC INDICATOR LIGHT CR104PLG17 CR104PXG47

NEW SCHIELE FOOT SWITCH AKF-11 AKF11 A136M104

NEW GE C-2000 LEVER SELECTOR SWITCH P9CSVE0N 90376 MAINTAINED POSITION

Square D Pushbutton Green Cap 9001 KXRB35G 9001KXRB35G New

NEW CUTLER HAMMER PUSHBUTTON OPERATOR W/ LIGHT E30JN 

NEW GE GENERAL ELECTRIC OILTIGHT MUSHROOM HEAD PUSH BUTTON CR2940UK200C RED

NEW ENTRELEC SELECTOR SWITCH S7026369 36000026 TYPE I-80 600V 30HP 3PH 80A 4 POS

NEW ELAN SELECTOR SWITCH 1 POSITION VDE 0660 VDE0660

Allen Bradley 800H-PP46G Pilot Light 800H-PP46* Green

OMRON PHOTOELECTRIC SWITCH E3F2-DS10B4-N E3F2DS10B4N 10 TO 30VDC

NEW GENERAL ELECTRIC PUSHBUTTON CR104PBL11A3S2 125V 3W

NEW MICRO SWITCH PTKBC2241C-G00 SELECTOR SWITCH KIT W/ KEY PTCC KEY # T112

NEW EMECANIQUE 3 POSITION MAINTAINED SELECTOR SWITCH ZA2BD3 64531

CENTRALAB WN-402 4000 OHM LINEAR TAPER POTENTIOMETER

SCHNEIDER ELECTRIC / EMECANIQUE XB5AVB4 24VAC RED LED PILOT LIGHT NEW 

GENERAL ELECTRIC CR104A8102 150V SERIES A OIL TIGHT PUSH BUTTON NEW  

NEW ALLEN BRADLEY PUSH BUTTON SWITCH 800T-KD6AAXX 800TKD6AAXX SER T

Square D Pushbutton Green Cap 9001 SK2L35GH13 9001SK2L35GH13 New

NEW FURNAS 52PA6E3WJK OIL TIGHT PUSH BUTTON RED 110V

NEW SIEMENS EMERGENCY STOP PULLWIRE SWITCH 3SE7 120-1BF00 6A 6 A AMP 300V

Ingersoll Rand 24 VAC Amber Light for Pushbutton 39485032 New

NEW ALLEN BRADLEY 800T-16JX2KC1 SELECTOR SWITCH W/O KNOB SER T 120V BULL 800T 

NEW ALLEN BRADLEY 800T-16JX2KC1 SELECTOR SWITCH W/O KNOB SER U 120V BULL 800T 

KRAUS & NAIMER ROTARY CAM SELECTOR SWITCH C32 C28180 E 40A 600V

Square D Selector Switch 9001 SK43J1 9001SK43J1 Series K New

New Cutler Hammer E22SB53X44C ILL Green Selector Switch

New Cutler Hammer E22SB55X92A ILL White Selector Switch

ENTRELEC ROTARY SWITCH VY40/S/1023/APB/9001280// 051242301 SWI-0182A 600VAC NIB

GUARDIAN G1894 1/2" NPT IN 1 1/4" NPT OUT STAINLESS S/S EYEWASH STATION NIB

New Elan Red Pushbutton Push Button 380V~10A 

NEW CUTLER HAMMER COMPACT PUSHBUTTON OPERATOR W/IND LIGHT E30EB 240V 60HZ

ENTRELEC ROTARY SWITCH I-80 145205013-001 360 007 59 600 V 80A 80 A AMP NIB

NEW EATON ROTARY CAM SWITCH T0-4-15682/EA/SVB CT04-15682-DMCRQ T0415682EASVB

Square D Illuminated Pushbutton Blue Top 9001 SK2L35L21H13 9001SK2L35L21H13 New

NEW MICRO SWITCH PTKEE2381C-H00 SELECTOR SWITCH KIT W/ KEY PTCC & PTNH00 

NEW ALLEN BRADLEY PUSHBUTTON SWITCH 800HL-AP2 800HLAP2 SER A TYPE 7,9

ALLEN BRADLEY 800A-M2AA24 SER B MOMENTARY CONTACT AMBER PUSH BUTTON NEW

Square D Pushbutton w/o Interlock 9001 KXRL 9001KXRL Series A New

Allen Bradley Amber Cap Pilot Light 800MR-Q24A 800MRQ24A 24 VAC/DC Ser B New 

Square D Pushbutton Orange Top 9001 SK2L35AH13 9001SK2L35AH13 New

Allen Bradley 30mm Push-Button Selector Switch 800T-16HA5KL8AX Ser U New

NEW ALLEN BRADLEY PUSH BUTTON SWITCH 800T-K1AAXX 800TK1AAXX SER T TYPE 13

ENTRELEC ROTARY SWITCH 360 007 59 145205013-001 I-80 80 A 600 V 30 HP NIB

Allen Bradley Red Cap Pilot Light 800MR-Q24R 800MRQ24R 24 VDC/AC Ser B New 

NEW ALLEN BRADLEY 800T-16JA4KB7AX SELECTOR SWITCH SER U BULL 800T AMBER KNOB 

NEW ALLEN BRADLEY 800T-16JA2KC1AA SELECTOR SWITCH SER U / AMBER BULL 800T 120V 

NEW COMPTROL TENSIONCELL  LOAD CELL  BB30X24K  W2 

ENTRELEC ROTARY SWITCH SWI-0124A 047472327 VY125/S/32950/9000951SWI-0124A NIB

NEW SQUARE D 9001KR4BH13 PUSHBUTTON 10A 240V BLACK 

NEW ALLEN BRADLEY ILLUMINATED PUSH BUTTON 800H FRXTP16RD4 SER F 800HFRXTP16RD4

NEW IDEC PUSH BUTTON ILLUMINATED SWITCH LW6ML-M1C64MG LW6MLM1C64MG 250 VDC

Klockner Moeller DIL00AM-G-01 Starter 24V DIL00AMG01 W/ Z00-4 2.4-4A 

TRIAC 2R300DAR RACK & PINION DOUBLE ACTING AIR PNEUMATIC VALVE ACTUATOR 

NEW CUTLER HAMMER 10250T26G GREEN MUSHROOM PUSH BUTTON W/ CONTACT BLOCK SER A2