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。
HARLAND K07898 PC BOARD MODULE
HARLAND K07898 PC BOARD MODULE
HARLAND SIMON H4890P1200 INPUT CARD
HARLAND SIMON H4890P1200 INPUT CARD
HARLAND SIMON H4890P1386 PROCESSOR BOARD
HARLAND SIMON H4890P1386 PROCESSOR BOARD
HARLAND SIMON H4890P1386 PROCESSOR BOARD
HARLAND SIMON H4890P1386 PROCESSOR BOARD
HARLAND SIMON H4890P1386 PROCESSOR CARD MOD. 1234
HARLAND SIMON H4890P1386 PROCESSOR CARD MOD. 1234
HARLAND SIMON H4890P1424 PROCESSOR BOARD
HARLAND SIMON H4890P1424 PROCESSOR BOARD
HARLAND SIMON H4890P1439 PC BOARD
HARLAND SIMON H4890P1439 PC BOARD
HARLAND SIMON H4890P1439 PC BOARD
HARLAND SIMON H4890P1439 PC BOARD
HARLAND SIMON H4890P1439 PC BOARD
HARLAND SIMON H4890P1439 PC BOARD
HARLAND SIMON H4890P1608 PC BOARD
HARLAND SIMON H4890P1608 PC BOARD
HARLAND SIMON H4890P1649 PC BOARD
HARLAND SIMON H4890P1649 PC BOARD
HARLAND SIMON H4890P1651 PC BOARD
HARLAND SIMON H4890P1651 PC BOARD
HARMER SIMMONS 3AW01092AAAA01 PCB CARD 3AW15513AAAA01
HARMER SIMMONS 3AW01092AAAA01 PCB CARD 3AW15513AAAA01
HARMER SIMMONS 3AW01092AAAA01 PCB CARD 3AW15513AAAA01
HARMER SIMMONS 3AW01092AAAA01 PCB CARD 3AW15513AAAA01
Harnis Scan Systems HSS05COMMUX16 Rev H COMMUNICASION PCB CRAD
Harnis Scan Systems HSS05COMMUX16 Rev H COMMUNICASION PCB CRAD
HASS MFG CO. PN10354 CONTROL BOARD 10354
HASS MFG CO. PN10354 CONTROL BOARD 10354
HASS MFG CO. PN10354 CONTROL BOARD 10354
HASS MFG CO. PN10354 CONTROL BOARD 10354
HASS MFG. 10354 PC BOARD
HASS MFG. 10354 PC BOARD
HAWE Hydraulik EV22K2-12/24 Amplifier Card 6217 8059
HAWE Hydraulik EV22K2-12/24 Amplifier Card 6217 8059
HAWE HYDRAULIK EV22K4-12/24 AMPLIFIER CARD MOUNT
HAWE HYDRAULIK EV22K4-12/24 AMPLIFIER CARD MOUNT
HBDIM PCB BOARD E 3495
HBDIM PCB BOARD E 3495
HBDIM PCB BOARD E 3495
HBDIM PCB BOARD E 3495
HBDIM PCB BOARD E 3495
HBDIM PCB BOARD E 3495
HBDIM PCB BOARD E 3495
HBDIM PCB BOARD E 3495
HBM ME50 PC BOARD ME50/MA50
HBM ME50 PC BOARD ME50/MA50
HDI BK LIGHT MEM PCB HDI013BS515BKT42 / FAST SHIP DHL OR FEDEX
HDI BK LIGHT MEM PCB HDI013BS515BKT42 / FAST SHIP DHL OR FEDEX
HDI BK LIGHT MEM PCB HDI013BS515BKT42 / FAST SHIP DHL OR FEDEX
HDI BK LIGHT MEM PCB HDI013BS515BKT42 / FAST SHIP DHL OR FEDEX
HDR 80-H2010399-90 BOARD 80H201039990
HDR 80-H2010399-90 BOARD 80H201039990
HDR 80-H2010399-90 BOARD 80H201039990
HDR 80-H2010399-90 BOARD 80H201039990
HDR 80-H2010399-90 BOARD 80H201039990
HDR 80-H2010399-90 BOARD 80H201039990
HEAT AND CONTROL INC 104PW03F POWER SUPPLY CONVERTER BOARD
HEAT AND CONTROL INC 104PW03F POWER SUPPLY CONVERTER BOARD
HEIDELBERG 624928-003 MULTIPLEXER BOARD 624928003
HEIDELBERG 624928-003 MULTIPLEXER BOARD 624928003
HEIDELBERG CP.186.5179 INTERFACE BOARD 9605.835/01 CP1865179
HEIDELBERG CP.186.5179 INTERFACE BOARD 9605.835/01 CP1865179
HEIDELBERG HARRIS SE80TA129 PIA PAMUS INTERFACE BOARD
HEIDELBERG HARRIS SE80TA129 PIA PAMUS INTERFACE BOARD
HEINEN ELEKTRONIK RELA24 PC BOARD
HEINEN ELEKTRONIK RELA24 PC BOARD
HEINEN ELEKTRONIK RELA24 PC BOARD
HEINEN ELEKTRONIK RELA24 PC BOARD
HELITRON LP4014-II PCB CARD
HELITRON LP4014-II PCB CARD
HELITRON LP4014-II PCB CARD
HELITRON LP4014-II PCB CARD
HELITRON LP4020 I POWER SUPPLY PCB CARD
HELITRON LP4020 I POWER SUPPLY PCB CARD
HELITRON LP4020 I POWER SUPPLY PCB CARD
HELITRON LP4020 I POWER SUPPLY PCB CARD
HELLER 23.023389 INTERFACE CARD 20000642, 23023389 REPAIRED
HELLER 23.023389 INTERFACE CARD 20000642, 23023389 REPAIRED
HELLER 23.023389 INTERFACE CARD 20000642, 23023389 REPAIRED
HELLER 23.023389 INTERFACE CARD 20000642, 23023389 REPAIRED
HELLER 23.026.096 CONTROL CARD 23026096
HELLER 23.026.096 CONTROL CARD 23026096
HELLER 23.030.741 PC BOARD 23030741
HELLER 23.030.741 PC BOARD 23030741
HEMISPHERE BEACON RECEIVER SBX-4 PCB CARD
HEMISPHERE BEACON RECEIVER SBX-4 PCB CARD
HENSCHEL 5HG SYNCHRO TRANSMITTER MK. 6 MOD: 9
HENSCHEL 5HG SYNCHRO TRANSMITTER MK. 6 MOD: 9
HERIANA HT201-KA1 THERMOCOUPLE AMPLIFIER
HERIANA HT201-KA1 THERMOCOUPLE AMPLIFIER
HERION 0773087 CIRCUIT BOARD
HERION 0773087 CIRCUIT BOARD
HERION 59-965-01 PC BOARD 5996501
HERION 59-965-01 PC BOARD 5996501
HERNIS 22021 PCB CARD 25529-3992-P3 REV B
HERNIS 22021 PCB CARD 25529-3992-P3 REV B
HERNIS 22021 PCB CARD REV B
HERNIS 22021 PCB CARD REV B
HERNIS 22021 PCB CARD REV B
HERNIS 22021 PCB CARD REV B
HERNIS 22022 PCB CARD 25629-1192-P2
HERNIS 22022 PCB CARD 25629-1192-P2
HERNIS ELECTRONICS 22111 C VIDEO SWITCH CARD
HERNIS ELECTRONICS 22111 C VIDEO SWITCH CARD
HERNIS SCAN SYSTEM 22025 PCB CARD REV A
HERNIS SCAN SYSTEM 22025 PCB CARD REV A
HERNIS SCAN SYSTEM 22025 PCB CARD REV A
HERNIS SCAN SYSTEM 22025 PCB CARD REV A
HERNIS SCAN SYSTEM A/S PCB 22041 REV B / FAST SHIP DHL OR FEDEX
HERNIS SCAN SYSTEM A/S PCB 22041 REV B / FAST SHIP DHL OR FEDEX
HERNIS SCAN SYSTEM HSS05 MULTICOM PCB CARD
HERNIS SCAN SYSTEM HSS05 MULTICOM PCB CARD
HERNIS SCAN SYSTEM HSS05 MULTICOM PCB CARD
HERNIS SCAN SYSTEM HSS05 MULTICOM PCB CARD
Hernis Scan Systems HSS05IO-32-8 REV 1 Pcb Card
Hernis Scan Systems HSS05IO-32-8 REV 1 Pcb Card
Hernis Scan Systems HSS05IO-32-8 REV 1 Pcb Card
Hernis Scan Systems HSS05IO-32-8 REV 1 Pcb Card
Hernis Scan Systems HSSOSPOWER REV K HS050D POWER SUPPLY CARD
Hernis Scan Systems HSSOSPOWER REV K HS050D POWER SUPPLY CARD
HEUKO/YASKAWA TECHNOLOGY PGB-2K PCB CARD / FAST BY DHL & FEDEX
HEUKO/YASKAWA TECHNOLOGY PGB-2K PCB CARD / FAST BY DHL & FEDEX
HEWLETT PACKARD 02620-09003 CIRCUIT BOARD 42-2122 B-1912-42 0262009003
HEWLETT PACKARD 02620-09003 CIRCUIT BOARD 42-2122 B-1912-42 0262009003
HEWLETT PACKARD 02620-09003 CIRCUIT BOARD 42-2122 B-1912-42 0262009003
HEWLETT PACKARD 02620-09003 CIRCUIT BOARD 42-2122 B-1912-42 0262009003
HEWLETT PACKARD 02620-60003 CIRCUIT BOARD 0262060003 F-2013-42 42-2039
HEWLETT PACKARD 02620-60003 CIRCUIT BOARD 0262060003 F-2013-42 42-2039
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