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。
SOUTHERN AVIONICS SLP09701 SSK CODER SHIFT REGISTER PCB CARD PWB 97 REV C
SOUTHERN AVIONICS SPA PWB 296 PCB CARD 910908
SOUTHERN AVIONICS SPA PWB 296 PCB CARD 910908
SOUTHERN AVIONICS SPA PWB 296 PCB CARD 910908
SOUTHERN AVIONICS SPA PWB 296 PCB CARD 910908
SOUTHERN AVIONICS SPA PWB 296 PCB CARD 910908
SOUTHERN AVIONICS SPA PWB 296 PCB CARD 910908
SOUTHERN AVIONICS SPA PWB 296 PCB CARD 910908
SOUTHERN AVIONICS SPA PWB 296 PCB CARD 910908
SOUTHERN AVIONICS SRP45600 BATTERY SENSE/EREG REV A
SOUTHERN AVIONICS SRP45600 BATTERY SENSE/EREG REV A
SOYO KUKA SY-7SBBV1.0 MOTHER BOARD 3890222-0 SY7SBBV10 00-104-420
SOYO KUKA SY-7SBBV1.0 MOTHER BOARD 3890222-0 SY7SBBV10 00-104-420
SOYO KUKA SY-7SBBV1.0 MOTHER BOARD 3890222-0 SY7SBBV10 00-104-420
SOYO KUKA SY-7SBBV1.0 MOTHER BOARD 3890222-0 SY7SBBV10 00-104-420
SPACECOM A/S SPAC-AS30019 TRACKING & CONTROL UNIT REV 1.0
SPACECOM A/S SPAC-AS30019 TRACKING & CONTROL UNIT REV 1.0
SPEC 1622C169 DUAL SLAVE CATHODIC PROTECTION EQUIPMENT PCB P00 1220A ISSUE A
SPEC 1622C169 DUAL SLAVE CATHODIC PROTECTION EQUIPMENT PCB P00 1220A ISSUE A
SPECIAL TIMER CORPORATION 7937-8133 CIRCUIT BOARD 70153 E181895 79378133
SPECIAL TIMER CORPORATION 7937-8133 CIRCUIT BOARD 70153 E181895 79378133
SPECIAL TIMER CORPORATION 7937-8133 CIRCUIT BOARD 70153 E181895 79378133
SPECIAL TIMER CORPORATION 7937-8133 CIRCUIT BOARD 70153 E181895 79378133
SPECIAL TIMER CORPORATION 7937-8133 CIRCUIT BOARD 70153 E181895 79378133
SPECIAL TIMER CORPORATION 7937-8133 CIRCUIT BOARD 70153 E181895 79378133
SPECIAL TIMER CORPORATION 7937-8133 CIRCUIT BOARD 70153 E181895 79378133
SPECIAL TIMER CORPORATION 7937-8133 CIRCUIT BOARD 70153 E181895 79378133
SPECTOR LUMENEX LOAD MONITOR PCB BIC / FAST
SPECTOR LUMENEX LOAD MONITOR PCB BIC / FAST
SPECTOR LUMENEX LOAD MONITOR PCB BIC / FAST
SPECTOR LUMENEX LOAD MONITOR PCB BIC / FAST
SPECTOR LUMENEX LOAD MONITOR PCB BIC / FAST
SPECTOR LUMENEX LOAD MONITOR PCB BIC / FAST
SPECTOR LUMENEX PCB RELAY BOARD ACE/408/CON / FAST BY DHL / FEDEX
SPECTOR LUMENEX PCB RELAY BOARD ACE/408/CON / FAST BY DHL / FEDEX
SPECTOR LUMENEX PRIMARY PERIPHERAL I/O PCB RELAY BOARD ACE/401/PIO OB101/01/3/07
SPECTOR LUMENEX PRIMARY PERIPHERAL I/O PCB RELAY BOARD ACE/401/PIO OB101/01/3/07
SPECTOR LUMENEX TYCO LOOP LINE MONITOR PCB 0B015/54/3/01 I1 / FAST
SPECTOR LUMENEX TYCO LOOP LINE MONITOR PCB 0B015/54/3/01 I1 / FAST
SPECTOR LUMENEX TYCO LOOP LINE MONITOR PCB 0B015/54/3/01 I1 / FAST
SPECTOR LUMENEX TYCO LOOP LINE MONITOR PCB 0B015/54/3/01 I1 / FAST
SPECTOR LUMENEX TYCO LOOP LINE MONITOR PCB 0B015/54/3/01 I1 / FAST
SPECTOR LUMENEX TYCO LOOP LINE MONITOR PCB 0B015/54/3/01 I1 / FAST
SPECTOR/LUMENEX ACE INPUT CARD PCB CTR 02-20 / FAST SHI[P DHL OR FEDEX
SPECTOR/LUMENEX ACE INPUT CARD PCB CTR 02-20 / FAST SHI[P DHL OR FEDEX
SPECTOR/LUMENEX PCB ACE/406 HUB SITE WIDE AUDIO HUB 0B101/01/3/42 ISSUE 1
SPECTOR/LUMENEX PCB ACE/406 HUB SITE WIDE AUDIO HUB 0B101/01/3/42 ISSUE 1
SPECTOR/LUMENEX PCB ACE/406 HUB SITE WIDE AUDIO HUB 0B101/01/3/42 ISSUE 1
SPECTOR/LUMENEX PCB ACE/406 HUB SITE WIDE AUDIO HUB 0B101/01/3/42 ISSUE 1
SPECTOR/LUMENEX PCB ACE/406 HUB SITE WIDE AUDIO HUB 0B101/01/3/42 ISSUE 1
SPECTOR/LUMENEX PCB ACE/406 HUB SITE WIDE AUDIO HUB 0B101/01/3/42 ISSUE 1
SPERRE 3832 BEARING SHELL U/L 140-219 - LOT OF 2
SPERRE 3832 BEARING SHELL U/L 140-219 - LOT OF 2
SPERRY MARINE PCB X-BAND ASSY NO 65830812-03 Modulator
SPERRY MARINE PCB X-BAND ASSY NO 65830812-03 Modulator
SPIRAL-MATIC 838 CIRCUIT BOARD
SPIRAL-MATIC 838 CIRCUIT BOARD
SPIRAL-MATIC 838 CIRCUIT BOARD
SPIRAL-MATIC 838 CIRCUIT BOARD
SPPL 002-00001 CONTROLLER CARD REV 0
SPPL 002-00001 CONTROLLER CARD REV 0
SQUARE D 52011-435-50 BOARD 5201143550
SQUARE D 52011-435-50 BOARD 5201143550
SQUARE D 52011-435-50 BOARD 5201143550
SQUARE D 52011-435-50 BOARD 5201143550
SQUARE D 52012-634-50 GATE DRIVER BOARD REV.F 5201263450
SQUARE D 52012-634-50 GATE DRIVER BOARD REV.F 5201263450
SQUARE D 9012 GAW-5 PRESSURE SWITCH INTERRUPTOR SERIES C
SQUARE D 9012 GAW-5 PRESSURE SWITCH INTERRUPTOR SERIES C
SQUARE D 9012 GAW-5 PRESSURE SWITCH INTERRUPTOR SERIES C
SQUARE D 9012 GAW-5 PRESSURE SWITCH INTERRUPTOR SERIES C
SR3301-S2 POWER SUPPLY PCB BOARD SR3301-B
SR3301-S2 POWER SUPPLY PCB BOARD SR3301-B
SR3301-S2 POWER SUPPLY PCB BOARD SR3301-B
SR3301-S2 POWER SUPPLY PCB BOARD SR3301-B
SRAM JA SERIES SRN256K5W MEMORY PC CARD
SRAM JA SERIES SRN256K5W MEMORY PC CARD
SRM 03E-00216-00 CIRCUIT BOARD 03E0021600
SRM 03E-00216-00 CIRCUIT BOARD 03E0021600
SS-3 94V-0 E229342 PCB CARD
SS-3 94V-0 E229342 PCB CARD
SST 5136-DSD PC INTERFACE CARD 5136-DSD
SST 5136-DSD PC INTERFACE CARD 5136-DSD
SST-PFB-SLC Woodhead Profibus Scanner Module
SST-PFB-SLC Woodhead Profibus Scanner Module
STARTECH ST1000BT32 GIGABIT ETHERNET NETWORK ADAPTER CARD 28110-2X2B
STARTECH ST1000BT32 GIGABIT ETHERNET NETWORK ADAPTER CARD 28110-2X2B
STC 7937-3-7 CIRCUIT BOARD 793737
STC 7937-3-7 CIRCUIT BOARD 793737
STC SME-102 PC BOARD SME102
STC SME-102 PC BOARD SME102
STC SME-103 PC BOARD SME103
STC SME-103 PC BOARD SME103
STC SME114 PC BOARD
STC SME114 PC BOARD
STC-003 P.C. BOARD EB 2005-04 94V-0 PCB CARD
STC-003 P.C. BOARD EB 2005-04 94V-0 PCB CARD
STCDC882A-1 GAS INDICATOR PCB W012987-005 / FAST
STCDC882A-1 GAS INDICATOR PCB W012987-005 / FAST
STD22 SENSOR PCB KSG 110-233.P01.EOO.07
STD22 SENSOR PCB KSG 110-233.P01.EOO.07
STD22 SENSOR PCB KSG 110-233.P01.EOO.07
STD22 SENSOR PCB KSG 110-233.P01.EOO.07
STD22 SENSOR PCB KSG 110-233.P01.EOO.07
STD22 SENSOR PCB KSG 110-233.P01.EOO.07
STEGMANN 026.070.400.300 CONTROLLER CARD MODULE 026070400300
STEGMANN 026.070.400.300 CONTROLLER CARD MODULE 026070400300
STEIN SOHN E401.1A PCB CARD
STEIN SOHN E401.1A PCB CARD
STEIN SOHN E401.1A PCB CARD [2]
STEIN SOHN E401.1A PCB CARD [2]
STEIN SOHN E736.1 PCB BOARD REV.A
STEIN SOHN E736.1 PCB BOARD REV.A
STEIN SOHN E736.1 PCB BOARD REV.A
STEIN SOHN E736.1 PCB BOARD REV.A
STEIN SOHN F105005A DCI 24 PLUS PCB MODULE REV K
STEIN SOHN F105005A DCI 24 PLUS PCB MODULE REV K
STEIN SOHN VISTA AUTOMATION DCI 24 PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI 24 PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI 24 PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI 24 PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI 24 PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI 24 PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI 24 PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI 24 PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI-24 PLUS PCB MODULE
STEIN SOHN VISTA AUTOMATION DCI-24 PLUS PCB MODULE
STEINCO STI-RTD4-1 PCB MODULE STI-RTD4-1
STEINCO STI-RTD4-1 PCB MODULE STI-RTD4-1
STEINCO STI-RTD4-1 PCB MODULE STI-RTD4-1
STEINCO STI-RTD4-1 PCB MODULE STI-RTD4-1
STEINCO STI-RTD4-1 PCB MODULE STI-RTD4-1/24
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