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。
HEWLETT PACKARD Q7819-61009 FORMATTER BOARD Q781961009
HEWLETT PACKARD Q7819-61009 FORMATTER BOARD Q781961009
HEWLETT PACKARD Q7819-61009 FORMATTER BOARD Q781961009
HEWLETT PACKARD Q7819-61009 FORMATTER BOARD Q781961009
HF1014 PCB CARD T64S12047D REV 1.3
HF1014 PCB CARD T64S12047D REV 1.3
HHC HILL HAYES 0000-0075-01 DC TO DC ISOLATOR PCB CARD REV A
HHC HILL HAYES 0000-0075-01 DC TO DC ISOLATOR PCB CARD REV A
HHC HILL HAYES 0000-0075-01 DC TO DC ISOLATOR PCB CARD REV A
HHC HILL HAYES 0000-0075-01 DC TO DC ISOLATOR PCB CARD REV A
HHC HILL HAYES COMPANY LOW PASS FILTER PCB 000-0007 REV.B / FAST
HHC HILL HAYES COMPANY LOW PASS FILTER PCB 000-0007 REV.B / FAST
HHC HILL HAYES COMPANY LOW PASS FILTER PCB 000-0007 REV.B / FAST
HHC HILL HAYES COMPANY LOW PASS FILTER PCB 000-0007 REV.B / FAST
HHC HILL HAYES COMPANY PCB 0000-0016 01 / FAST
HHC HILL HAYES COMPANY PCB 0000-0016 01 / FAST
HHC HILL HAYES COMPANY PCB 0000-0016 01 / FAST
HHC HILL HAYES COMPANY PCB 0000-0016 01 / FAST
HIAIR KOREA HDEF-AC-103-R1 CIRCUIT BOARD FOR RCC-1 CONTROLLER
HIAIR KOREA HDEF-AC-103-R1 CIRCUIT BOARD FOR RCC-1 CONTROLLER
HILL GRAHAM CONTROLS P362T PCB CONTACTOR AUCTIONEER
HILL GRAHAM CONTROLS P362T PCB CONTACTOR AUCTIONEER
HIMA 6FA02 PCB CARD
HIMA 6FA02 PCB CARD
HINOX ES5-10EM POWER SUPPLY
HINOX ES5-10EM POWER SUPPLY
HIRSCHMAN RH1-CX RAIL HUB PCB MODULE 737 689-001 AZ00
HIRSCHMAN RH1-CX RAIL HUB PCB MODULE 737 689-001 AZ00
HIRSCHMANN OZD PROFI 12M G12 FIBEROPTIC MODULE PROFIBUS OZDPROFI12M
HIRSCHMANN OZD PROFI 12M G12 FIBEROPTIC MODULE PROFIBUS OZDPROFI12M
HITACHI 10-37-00-01 PC BOARD HDCD 10-37-00-01
HITACHI 10-37-00-01 PC BOARD HDCD 10-37-00-01
HITACHI 2Y000925-4 PC BOARD CPUY 2Y0009254
HITACHI 2Y000925-4 PC BOARD CPUY 2Y0009254
HITACHI 802245143 MEMORY BOARD BEK-0850-13
HITACHI 802245143 MEMORY BOARD BEK-0850-13
HITACHI BE-080-0-198 CIRCUIT BOARD BE0800198 155-225-241 6064389
HITACHI BE-080-0-198 CIRCUIT BOARD BE0800198 155-225-241 6064389
HITACHI ROME52A PC BOARD 1690-2301 ROME-4KW P-250E
HITACHI ROME52A PC BOARD 1690-2301 ROME-4KW P-250E
HJV INC IL0119 CIRCUIT BOARD
HJV INC IL0119 CIRCUIT BOARD
HMW ENTERPRISES IF-MMI-90 CIRCUIT BOARD IFMMI90 74LS123 C8751H
HMW ENTERPRISES IF-MMI-90 CIRCUIT BOARD IFMMI90 74LS123 C8751H
HMW ENTERPRISES RMA-1586 CIRCUIT BOARD A139405 A139408-A RMA1586
HMW ENTERPRISES RMA-1586 CIRCUIT BOARD A139405 A139408-A RMA1586
HMW ENTERPRISES RMA-1586 CIRCUIT BOARD A139405 A139408-A RMA1586
HMW ENTERPRISES RMA-1586 CIRCUIT BOARD A139405 A139408-A RMA1586
HOBART 192108 DISPLAY CARD R192108
HOBART 192108 DISPLAY CARD R192108
HOBART 215032-1 PCB CARD 02663420285 V.1_87
HOBART 215032-1 PCB CARD 02663420285 V.1_87
HOBART 917213D ASSY RECIPE TIMER PCB EM1610
HOBART 917213D ASSY RECIPE TIMER PCB EM1610
HOBART 917213D ASSY RECIPE TIMER PCB EM1610
HOBART 917213D ASSY RECIPE TIMER PCB EM1610
HOBART AM 12 DISHWASHER PCB CARD D120354-1
HOBART AM 12 DISHWASHER PCB CARD D120354-1
HOBART OC205-1-1C CONTROL UNIT PCB 897545-001/00
HOBART OC205-1-1C CONTROL UNIT PCB 897545-001/00
HOBART OC205-1-1C CONTROL UNIT PCB 897545-001/00
HOBART OC205-1-1C CONTROL UNIT PCB 897545-001/00
HOCHIKI HF-24 ULTRA-VIOLET FLAME DETECTOR 90120099
HOCHIKI HF-24 ULTRA-VIOLET FLAME DETECTOR 90120099
HOMATIC AUTOMATA D-2100-001-1 BOARD MULTI E/A
HOMATIC AUTOMATA D-2100-001-1 BOARD MULTI E/A
HONEYWELL 04349500 TERMINATION BOARD
HONEYWELL 04349500 TERMINATION BOARD
HONEYWELL 04349500 TERMINATION BOARD
HONEYWELL 04349500 TERMINATION BOARD
HONEYWELL 04349500 TERMINATION BOARD
HONEYWELL 04349500 TERMINATION BOARD
HONEYWELL 05319100 CIRCUIT CARD
HONEYWELL 05319100 CIRCUIT CARD
HONEYWELL 05320802 PC BOARD REV.C
HONEYWELL 05320802 PC BOARD REV.C
HONEYWELL 134199A PC BOARD
HONEYWELL 134199A PC BOARD
HONEYWELL 134202A PC BOARD
HONEYWELL 134202A PC BOARD
HONEYWELL 14CE1-1 MICRO SWITCH MINIATURE PRECISION LIMIT SWITCH
HONEYWELL 14CE1-1 MICRO SWITCH MINIATURE PRECISION LIMIT SWITCH
HONEYWELL 24110262-003 CHART RECORDER BOARD 24110262003
HONEYWELL 24110262-003 CHART RECORDER BOARD 24110262003
HONEYWELL 24110262-003 CHART RECORDER BOARD 24110262003
HONEYWELL 24110262-003 CHART RECORDER BOARD 24110262003
HONEYWELL 24110262-003 CHART RECORDER BOARD 24110262003
HONEYWELL 24110262-003 CHART RECORDER BOARD 24110262003
HONEYWELL 30676602-001 CONTROL BOARD 30676602001
HONEYWELL 30676602-001 CONTROL BOARD 30676602001
HONEYWELL 30683591-999 PC BOARD 30683591999
HONEYWELL 30683591-999 PC BOARD 30683591999
HONEYWELL 30731811 OUTPUT BOARD
HONEYWELL 30731811 OUTPUT BOARD
HONEYWELL 30731811 OUTPUT BOARD
HONEYWELL 30731811 OUTPUT BOARD
HONEYWELL 30735438-001 PC BOARD 30735438001
HONEYWELL 30735438-001 PC BOARD 30735438001
HONEYWELL 30735857-001 MEMORY BOARD
HONEYWELL 30735857-001 MEMORY BOARD
HONEYWELL 30735857-1 MEMORY BOARD
HONEYWELL 30735857-1 MEMORY BOARD
HONEYWELL 30750730-001 PC BOARD 30750730001
HONEYWELL 30750730-001 PC BOARD 30750730001
HONEYWELL 30752783-001 BATTERY TEST CARD
HONEYWELL 30752783-001 BATTERY TEST CARD
HONEYWELL 30752787-002 PC BOARD 30752787002
HONEYWELL 30752787-002 PC BOARD 30752787002
HONEYWELL 30754913-001 INPUT CARD 30754913001
HONEYWELL 30754913-001 INPUT CARD 30754913001
HONEYWELL 30754916-001 ALARM BOARD 30754916001
HONEYWELL 30754916-001 ALARM BOARD 30754916001
HONEYWELL 30754919-001 MOTHER BOARD 30754919001
HONEYWELL 30754919-001 MOTHER BOARD 30754919001
HONEYWELL 30756140-601 ALARM/ DIGITAL INPUT BOARD KIT DR4500 30756140601
HONEYWELL 30756140-601 ALARM/ DIGITAL INPUT BOARD KIT DR4500 30756140601
HONEYWELL 30756140-601 ALARM/ DIGITAL INPUT BOARD KIT DR4500 30756140601
HONEYWELL 30756140-601 ALARM/ DIGITAL INPUT BOARD KIT DR4500 30756140601
HONEYWELL 30756141-602 INPUT BOARD KIT DR4500 30756141602
HONEYWELL 30756141-602 INPUT BOARD KIT DR4500 30756141602
HONEYWELL 30756682-501 ADAPTER BOARD ASSY. 30756682501
HONEYWELL 30756682-501 ADAPTER BOARD ASSY. 30756682501
HONEYWELL 30757569-001 PROCESSOR BOARD FOR DR4500A RECORDER 30757569001
HONEYWELL 30757569-001 PROCESSOR BOARD FOR DR4500A RECORDER 30757569001
HONEYWELL 30757569-001 PROCESSOR BOARD FOR DR4500A RECORDER 30757569001
HONEYWELL 30757569-001 PROCESSOR BOARD FOR DR4500A RECORDER 30757569001
HONEYWELL 37280014-001 PCB CARD
HONEYWELL 37280014-001 PCB CARD
HONEYWELL 37280014-001 PCB CARD
HONEYWELL 37280014-001 PCB CARD REV P
HONEYWELL 37280014-001 PCB CARD REV P
HONEYWELL 37280014-001 PCB CARD REV P
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