福建中立恒自动化设备有限公司
一、摘要 PLC是一种专门在工业环境下应用而设计的数字运算操作的电子装置。
它采用可以编制程序的存储器,用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令,并能通过数字式或模拟式的输入和输出,控制各种类型的机械或生产过程。PLC及其有关的外围设备都应按照易于与工业控制系统形成一个整体,易于扩展其功能的原则而设计。在工业生产的各个领域,机械加工企业为了提高生产效率,采用机械化流水作业的方式,对不同类型的零件分别组成的自动生产线。随着产品机型的更新换代,生产线承担的加工对象也随之改变,这就需要改变控制程序,使生产线的机械设备按新的工艺过程运行,而继电接触器控制器系统是采用固定接线,很难适应这个要求。大型自动生产线的控制系统使用的继电器数量很多,随着PLC的应用日益普及,其使用方法简单,便于掌握,且可靠性,抗干扰性很强,自身具有完善的功能.模块化的结构,使其在工业生产线上的应用越来越广泛。
发展趋势:1.向高速度、大容量方向发展
为了提高PLC的处理能力,要求PLC具有的响应速度和更大的存储容量。目前,有的PLC的扫描速度可达0.1ms/k步左右。PLC的扫描速度已成为很重要的一个性能指标。
在存储容量方面,有的PLC可达几十兆字节。为了扩大存储容量,有的公司已使用了磁泡存储器或硬盘。
2.向超大型、超小型两个方向发展
当前中小型PLC比较多,为了适应市场的多种需要,今后PLC要向多品种方向发展,特别是向超大型和超小型两个方向发展。现已有I/O点数达14336点的超大型PLC,其使用32位微处理器,多CPU并行工作和大容量存储器,功能强。
8000000919 AE4 S2 SDS 14-850 PCB CARD
8000000919 AE4 S2 SDS 14-850 PCB CARD
8000000970 AE2 PCB BOARD
8000000970 AE2 PCB BOARD
8000000970 AE2 PCB BOARD
8000000970 AE2 PCB BOARD
8000013958 AE 02 PCB CARD 8000013959 AE 04
8000013958 AE 02 PCB CARD 8000013959 AE 04
8000013958 AE 02 PCB CARD 8000013959 AE 04
8000013958 AE 02 PCB CARD 8000013959 AE 04
8000013958 AE 02 PCB CARD 8000013959 AE 04
8000013958 AE 02 PCB CARD 8000013959 AE 04
8000013958 AE 02 PCB CARD 8000013959 AE 04
8000013958 AE 02 PCB CARD 8000013959 AE 04
80-0021 POWER BOARD 800021
80-0021 POWER BOARD 800021
80-0060-01 MAIN AMP BOARD 80006001
80-0060-01 MAIN AMP BOARD 80006001
800E-2DL5RADIO CONTROL CARD CRP1UZJAAG
800E-2DL5RADIO CONTROL CARD CRP1UZJAAG
806890 CONTROL BOARD REV 4 B0M-01145 806889 D9506
806890 CONTROL BOARD REV 4 B0M-01145 806889 D9506
806890 CONTROL BOARD REV 4 B0M-01145 806889 D9506
806890 CONTROL BOARD REV 4 B0M-01145 806889 D9506
806890 CONTROL BOARD REV 4 B0M-01145 806889 D9506
806890 CONTROL BOARD REV 4 B0M-01145 806889 D9506
80-H2009310-90 BOARD REV. D
80-H2009310-90 BOARD REV. D
8-49-0011 REV. A BOARD
8-49-0011 REV. A BOARD
8-49-0011 REV. A BOARD
8-49-0011 REV. A BOARD
8-49-0013 WRAPPER CONTROL MASTER BOARD 8490013
8-49-0013 WRAPPER CONTROL MASTER BOARD 8490013
8504C-AT PC CIRUIT BOARD CONTROL CARD 8504CAT
8504C-AT PC CIRUIT BOARD CONTROL CARD 8504CAT
8504C-AT PC CIRUIT BOARD CONTROL CARD 8504CAT
8504C-AT PC CIRUIT BOARD CONTROL CARD 8504CAT
868 MODULAR PCB BOARD DS 94V
868 MODULAR PCB BOARD DS 94V
886275 PCB CARD 630254 REV D
886275 PCB CARD 630254 REV D
9150021-684D PCB CARD PWB 9150021-090
9150021-684D PCB CARD PWB 9150021-090
9150021-684D PCB CARD PWB 9150021-090
9150021-684D PCB CARD PWB 9150021-090
921-016850 CIRCUIT CARD 921016850 OR 920016850
921-016850 CIRCUIT CARD 921016850 OR 920016850
9390 CIRCUIT BOARD BD-100
9390 CIRCUIT BOARD BD-100
947-01 FC DISPLAY PCB CARD
947-01 FC DISPLAY PCB CARD
9550695 PCB BOARD MIKE-E/A3
9550695 PCB BOARD MIKE-E/A3
9550695 PCB BOARD MIKE-E/A3
9550695 PCB BOARD MIKE-E/A3
970318SU LED BULB PCB SU-BL-220A
970318SU LED BULB PCB SU-BL-220A
97942ASSY174K441G01 INTERFACE BOARD
97942ASSY174K441G01 INTERFACE BOARD
97942ASSY174K441G01 INTERFACE BOARD
97942ASSY174K441G01 INTERFACE BOARD
A&D PC6229C PZ6229 SN3AG0.5CU CIRCUIT BOARD
A&D PC6229C PZ6229 SN3AG0.5CU CIRCUIT BOARD
A.E. LTD POWER SUPPLY PCB BH30-C 73-0034 / FAST BY DHL / FEDEX
A1090U02 PCB CARD E991 REV 03
A1090U02 PCB CARD E991 REV 03
AAG ALSTOM 187248K aag alstom 187248k
AAG ALSTOM 187248K aag alstom 187248k
AAG ALSTOM MFVU 187247K aag alstom mfvu 187247k
AAG ALSTOM MFVU 187247K aag alstom mfvu 187247k
AAG ALSTOM MFVU 61aag alstom mfvu 610727n
AAG ALSTOM MFVU 61aag alstom mfvu 610727n
AAG ALSTOM MVTU 284394K aag alstom mvtu 284394k
AAG ALSTOM MVTU 284394K aag alstom mvtu 284394k
AANDERAA DI123E01012 PCB REV B / FAST SHIP DHL OR FEDEX
AASTRA ROF157110/11 PCB CARD PA 723581 / FAST SHIP DL OR FEDEX
AB BLACK BOX CARD SM511-C
AB BLACK BOX CARD SM511-C
AB BLACK BOX CARD SM511-C
AB BLACK BOX CARD SM511-C
AB DICK 348064-C PC BOARD 348064C
AB DICK 348064-C PC BOARD 348064C
AB DICK 348064-C PC BOARD 348064C
AB DICK 348064-C PC BOARD 348064C
AB DICK 348065-E CIRCUIT BOARD 348065E 348069-B
AB DICK 348065-E CIRCUIT BOARD 348065E 348069-B
AB DICK 348065-E CIRCUIT BOARD 348065E 348069-B
AB DICK 348065-E CIRCUIT BOARD 348065E 348069-B
AB DICK 348069-B PC BOARD 348069B
AB DICK 348069-B PC BOARD 348069B
AB DICK 348069-B PC BOARD 348069B
AB DICK 348069-B PC BOARD 348069B
AB DICK 348090 PC BOARD 348094-B
AB DICK 348090 PC BOARD 348094-B
AB DICK 348090 PC BOARD 348094-B
AB DICK 348090 PC BOARD 348094-B
ABB 018383-004 CIRCUIT BOARD 018383004
ABB 018383-004 CIRCUIT BOARD 018383004
ABB 018383-004 CIRCUIT BOARD 018383004
ABB 018383-004 CIRCUIT BOARD 018383004
ABB 018383-004 CIRCUIT BOARD 018383004
ABB 018383-004 CIRCUIT BOARD 018383004
ABB 0-55310 PC CARD 055310
ABB 0-55310 PC CARD 055310
ABB 0-56301 CONTROL BOARD 00316305-A 056301
ABB 0-56301 CONTROL BOARD 00316305-A 056301
ABB 0-56301 CONTROL BOARD 00316305-A 056301
ABB 0-56301 CONTROL BOARD 00316305-A 056301
ABB 0-56302 CIRCUIT BOARD 056302
ABB 0-56302 CIRCUIT BOARD 056302
ABB 0-56303 CONTROL BOARD 00316205-D 056303
ABB 0-56303 CONTROL BOARD 00316205-D 056303
ABB 086364-501 PC BOARD 086364501
ABB 086364-501 PC BOARD 086364501
ABB 086364-501 PC BOARD 086364501
ABB 086364-501 PC BOARD 086364501
ABB 2668-171-33/3 PC BOARD 2668171333
ABB 2668-171-33/3 PC BOARD 2668171333
ABB 2668-171-33/3 PC BOARD 2668171333
ABB 2668-171-33/3 PC BOARD 2668171333
ABB 2-A236-1071 BACKPLANE BOARD 2A2361071
ABB 2-A236-1071 BACKPLANE BOARD 2A2361071
ABB 3183045474 /0 PCB BOARD WITH ALFA LAVAL MT50 BOARD