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2.1plc的定義plc稱為可編程序控制器,它是按照成熟而有效的繼電器控制概念和設計思想,利用不斷發展的新技術、新電子器件,逐步形成了具有特色的各種係列產品,是一種數字運算操作的電子計算機。它是將邏輯運算,順序控制,時序和計數以及算術運算等控制程序,用一串指令的形式存放到存儲器中,然後根據存儲的控制內容,經過模擬,數字等輸入輸出部件,對生產設備和生產過程進行控制的裝置。
2.2plc的發展歷程1969年dec公司按照gm(美國通用汽車公司)的要求研制了上第1臺plc並且在gm公司得到成功的應用。此後公司使plc商品化。plc是專門設計出來用於同繼電器產品競爭並逐步取代了傳統的繼電器。plc作為一種工業計算機,經歷了以下幾個發展的歷程。
1969-1972為第1階段,是plc的初期階段,在該階段的各廠家的plc差別很大、沒有統一的硬件和軟件標準、功能簡單、性強,硬件主要以分離元件為主,體積較大、性能較差、可靠性不高。
1972-為第二階段,在該階段plc逐步演化為一種的工業計算機,可靠性大大提高,成本大幅度降低,面向過程的梯形圖和語句表語言面世,係統逐步向標準化過渡,這些都為plc的普及奠定了基礎。
1981-至今,iec正式發表了plc的標準,各廠家的plc都向規範化發展。梯形圖、語句表、sfc語言已經成熟,同時還有和編程語言的接口,其存儲能力、運算速度、對模擬量的處理功能已經大大加強,現在的大中型plc已經具有以前dcs所“特有”的經典pid算法、斜坡函數、自適應算法、模糊控制等算法。
PEPPERL + FUCHS 217956 RLG28-55/40A/115B/136
GENERAL ELECTRIC FUSE GE EJ-2 6R AMP 328L493G19
GENERAL ELECTRIC GE CIRCUIT BOARD 444A399759-G01
HOFFMAN CSD16126W C-SD16126W
SMC Valve VFS5510-5DZ
GENERAL ELECTRIC IS200ATBAG1BAA1 6BA00
ABB YPH 105A, YT204001-DY/2 Digital Speed Input YT 204001-AU
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Keyence Corp VT-5SB 1136010
NTN BEARING 22220BKD1 NEW IN BOX
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Women's Native Inlay Cowgirl Boot Snip Toe 09-021-7622-0123 BR sz 9 B
HORNER ELECTRIC PLC RELAY MODULE 45C-RLYC HE45C-RLYC
Women's Native Inlay Cowgirl Boot Toe 09-021-7622-0123 BR sz 9 1/2 B
RELIANCE ELECTRIC 0-51845-2
General Electric GE DSI Board Card 193X637ACG04
FAIRCHILD Electro-Pneumatic Transducer TA6000-401
SMC VALVE MANIFOLD EX120-SMJ1 VVQ1000-10A-1 VQ1301R-5
ASEA ABB CIRCUIT BOARD CARD 2668 184-247/2
ALLEN BRADLEY AXIS MODULE 2094 9A 2094-AM01
TRANSITION NETWORKS SISTM1013-162-LR SISTM10XX-162 6-PORT
Advanced Motion 12A8M-INV
Drive Textron Cone Drive Gear Speed Reducer MH015A906-1-05 MH015A906 Opt 01 5:1
Drive Textron Cone Drive Gear Speed Reducer MH015A906-2-05 MH015A906 Opt 01 5:1
Compumotor Corp Motor Drive Controller M5710211 C-B
RELIANCE AUTOMAX PLC 4 SLOT RACK CHASSIS 45C911
Phoenix Contact UM-8REL/SI/21/14/PLC
GENERAL ELECTRIC GE CIRCUIT BOARD IC600YB923A
BF Goodrich ionics Systems, 501-1826-01 501182601 MAG-300A
Honeywell Temperature Controller 51-51-25-07 DC3002-0-22A-1-DIN-0111
Honeywell Temperature Controller YDC3002-0-22A-1-00-0111 51-51-25-07 51-51-99-25
RELIANCE ELECTRIC NETWORK COMMUNICATIONS 57404-2 57C404A
FANUC A860-0320-T111 2000P
Martin Sprocket Stainless Steel 40B30SS SS40B30X012K 3/4" 3/4
SIEMENS MILLTRONICS PROBE 7MH71431AA50 1P7MH7143-1AA50 TSP33 Z1003261
SMC VALVE SLIDE TABLE SHOCK ABSORB MXS16L-20B
ALLEN BRADLEY OVERLOAD RELAY 592-EC2PC
Gemco Quik-set II Control Panel 1988-2401JB
FISHER ROSEMOUNT POWER SUPPLY BOARD CARD PWA 01984-1460-0003 REV. J/AE
HEINEN ELEKTRONIK PC BOARD PIOE12
12" Long 2" ID Stainless Steel Flexible Coupling 2150 F316 316 SA182 B16.5 SS
Flow components 12" Long 2" ID Stainless Steel Flexible Coupling 304 SA182 B16.5
CINCINNATI MILACRON CIRCUIT BOARD, 3-711-2108G
FISHER ROSEMOUNT POWER SUPPLY BOARD PWA 01984-1460-0003
Eaton Dynamatic 15-871-2 25HP/50HP
Rexroth 1" Filter R432003067 AS5-FRE-N034-GAU
Rexroth 1" Filter R432003072 AS5-FRE-N100-GAU
SICK PROXIMITY SENSOR WL32-01