描述
可编程控制器(Programmable Logic Controller)简称PLC或PC,是从早期的继电器逻辑控制系统发展而来,它不断吸收微计算机技术使之功能不断增强,逐渐适合复杂的控制任务。
PLC之所以有生命力,在于它更加适合工业现场和市场的要求:高可靠性、强抗各种干扰的能力、编程安装使用简便、低价格长寿命。比之单片机,它的输入输出端更接近现场设备,不需添加太多的中间部件或需要更多的接口,这样节省了用户时间和成本。PLC的下端(输入端)为继电器、晶体管和晶闸管等控制部件,而上端一般是面向用户的微型计算机。人们在应用它时,可以不必进行计算机方面的专门培训,就能对可编程控制器进行操作及编程。用来完成各种各样的复杂程度不同的工业控制任务。
自1836年继电器问世,人们就开始用导线将它同开关器件巧妙地连接,构成用途各异的逻辑控制或顺序控制。至今,在PLC的编程语言——梯形图中还可以看到这些布线的影子。直到60年代末、70年代初可编程控制器问世,随着微电子技术、计算机技术和数据通信技术的飞速发展,以及微处理器的出现,PLC产品朝小型和超小型化方面进行了一次飞跃,终使早期的PLC从初的逻辑控制、顺序控制,发展成为具有逻辑判断、定时、计数、记忆和算术运算、数据处理、联网通信及PID回路调节等功能的现代PLC。
逻辑控制:PLC具有与、或、非、异或和触发器等逻辑运算功能,可以代替继电器进行开关量控制。
312A6077P001,312A6077P004,312A6089P001,312A6090P001,312A6090P002,312A6091P001,312A6091P002,312A6091P003,312A6091P004,313954-002 7913,313954-002 7713,
312A6046P003,312A6077P001,312A6077P004,312A6089P001,312A6090P001,312A6090P002,312A6091P001,312A6091P002,312A6091P003,312A6091P004,313954-002 7913,313954-002? 7713,313954-0027926,313965-009,313A3129P0001,314A5945P002 REV G,314A5945P002REVG,314A5945P2
,315A2066P001,315A2618P010,315A2660P003,315A2739P011,315A4147P2,315A4147P8,315A4204P001,315A4459P0004,315A4459P2,315A4459P4,315A9332P001,315A9332P1,318A1093,318A9427P001,318A95422,318A9542-2,318A95423,318A9542-3,318A95425,318A9542-5
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,323A2357P21,323A2357P3,323A2357P4,323A2374P2,323A2374P3,323A238P2,323A2396P155,323A2396P157,323A2396P18,323A2396P47
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,323A4747ETP37RKIT,323A4747ETP41,323A4747ETP4A,323A4747ETP6C,323A4747ETP8A,323A4747NZP27B,323A4747UCP5,323A4747UQP1A,323A4747UUP4,323A4747UUP5,323A5750P10,323A5750P11,323A5750P12,323A5750P13,323A5750P14,323A5750P16,323A5750P18,323A5750P20,323A5750P6,323A5750P7,323A5750P8,323A5750P9,323A5758G1,323A8923,323B7988P01,323B7988P02,323B7989P02,324A9109P107,324A9243P001,324A9586P001,324A9586P003,325,3268A1039P20A,326A196P002,326A2370P030,327659309C,3276593-09C,327659314,3276593-14,327932RA119A1,328A200HIOXX,328A7161P001,328A7161P003,328A7161P004,328A7230P119,328A7327P002,328A8427P001,328A8427P010,328A8478P002,328A8478P005,328A8478P107,328A9259001 (287A177133P001),329A3529P001,329A3529P020,329A3529P021,32D3126T,
GE公司GE Speedtronic Spares可变调速装置备件:343,365,450,600,610,814,1500,2272,2862,3001,3010,3130,3476,4153,4157,5806
,7415,8501,9012,14875,17021,18000,28320,42643,48220,64005,67097,67800,81303
,82262,98038,109452,114627,136855,148811,174600,200153,281048,282232,312602
,376911,387532,398530,398554,398557,398637,398682,398697,398737,398779,398785
,398803,398875,398879,398887,,98985,399137,399601,408222,408230,469480
522771,522772,721111,800234,1020516,1228803,1878509,359236,407140,111047
,111078,111705,670000,671035,987762,178500,260284,101107,466501,1197100,1510685
,6129100,2984712,3152201,0411043,3802000,8940005,15048634,19218632,71210225,31000000
447739150,99981004,32000000,00332303 31000913 20013000 111439004 530000000 605320002 597514501 9070000000 30471583020 702459000000 90010100000000 #2-B PERMATEX 0.35X1500 0000-7812-02 00079-0325-0002
001-1197-100 005-7416-34-0275 007-05FA-P25J EMO 282 00705FAP25JEMO282
01-002849 011-1197-100 01151-0685 01168J76P0001 0116B6650G1
0117C2164G01 0117C5050G001 01223J53P0001 01336J17P0010
01336J17P0017 01336J17P0019 01336J17P0401 0158D1083P002
30HR1,30-HR1,31,311A5177 P1,311A5177P1,311A5177P3,311A5177P5,,311A5178P002,311A5178P011,311A5178PT2,311A5178PT5,311A5178PT5 D,311A5449P005,311A5449P006,311A5782P002,311A5801P003,311A5802P001,311A5802P002,311A5802P008,311X0945WIBL100F,311X0945WIBL10-0F,311X0945WIBL246C,311X0945WIBL24-6C,311X0945WIBL246D,311X0945WIBL24-6D,311X0945WIBL246E,311X0945WIBL24-6E,311X0945WIBL246F,311X0945WIBL24-6F,312A6046P003,312A6077P001,312A6077P004,312A6089P001,312A6090P001,312A6090P002,312A6091P001,312A6091P002,312A6091P003,312A6091P004,313954-002 7913,313954-002? 7713,313954-0027926,313965-009,313A3129P0001,314A5945P002 REV G,314A5945P002REVG,314A5945P2
,315A2066P001,315A2618P010,315A2660P003,315A2739P011,315A4147P2,315A4147P8,315A4204P001,315A4459P0004,315A4459P2,315A4459P4,315A9332P001,315A9332P1,318A1093,318A9427P001,318A95422,318A9542-2,318A95423,318A9542-3,318A95425,318A9542-5
,318A95426,318A9542-6,318A9542P004,31Q014404,320E,321308B,32271,323031205,323-03-1205,
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