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。
CARLO GAVAZZI LIPS BV 4014D PCB CIRCUIT BOARD REV 1
CARLO GAVAZZI LIPS BV 4016 PCB CIRCUIT BOARD REV 04
CARLO GAVAZZI LIPS BV 4021B PCB CIRCUIT BOARD REV 2
CARLO GAVAZZI LIPS.B.V. 4014-0000 PCB CARD 4014 REV 2
CARLO GAVAZZI LIPS.B.V. 4018B PCB CARD REV 3
CARLO GAVAZZI LIPS.B.V. 4018B PCB CARD REV 3
CARLO GAVAZZI LIPS.B.V. 4037 PCB CARD 4037-6 REV 0
CARLO GAVAZZI MOD 360 INPUT TRANSDUCER CARD 360-026-026-00-11 REV.0
CAROTRON D10253 SONICTRAC CONTROL BOARD
CAROTRON D10253 SONICTRAC CONTROL BOARD
CAROTRON D10253 SONICTRAC CONTROL BOARD
CAROTRON D10253 SONICTRAC CONTROL BOARD
CAROTRON D11111 CIRCUIT BOARD C11114-000 PCBD11110G
CARRIER 12-01058-10RP PCB CARD
CARRIER 12-01058-10RP PCB CARD
CARRIER 12-01058-10RP PCB CARD
CARRIER 12-01058-10RP PCB CARD
CARRIER 2222352-8001 TERMINAL BOARD 22223528001
CARRIER 2222352-8001 TERMINAL BOARD 22223528001
CARRIER 2222352-8001 TERMINAL BOARD 22223528001
CARRIER 2222352-8001 TERMINAL BOARD 22223528001
CARRIER 2222352-8001 TERMINAL BOARD 22223528001
CARRIER 2222352-8001 TERMINAL BOARD 22223528001
CARRIER 79-60428-01 TRANSICOLD CAB CONTROLLER XARIOS 12-00527-02 REV.H
Carrier CEPL130335-02 Control Board PCB 32GB500372EE
Carrier Control Board CEPL130346-01 38AP501672 used
CARRIER HK98EZ110 PC BOARD AAA26800AEE1
CARRIER HK98EZ110 PC BOARD AAA26800AEE1
Carrier Transicold Division 12-01059-10RP Power Supply PCB Board
CARRIER TRANSICOLD DIVISION PCB 12-01085-0 / FAST SHIP DHL OR FEDEX
CASI RUSCO 110063001 READER INTERFACE BOARD REV. L
CATERPILLAR 30081348 BOARD
CATERPILLAR 30081348 BOARD
CATERPILLAR 30081348 BOARD
CATERPILLAR 30081348 BOARD
CATTRON INC. D32G2-000 DECODER BOARD D32G2000
CATTRON INC. D32G2-000 DECODER BOARD D32G2000
CATTRON INC. D32G2-000 DECODER BOARD D32G2000
CATTRON INC. D32G2-000 DECODER BOARD D32G2000
CATTRON INC. D32G2-000 DECODER BOARD D32G2000
CATTRON INC. D32G2-000 DECODER BOARD D32G2000
CAVOTEC M9 1040 3001 BARRIER MODULE DNV-2003-OSL-ATEX-0087 REV.5
CAVOTEC MICRO-CONTROL AS PCB CARD M5-1071-0030 REV 8 / FAST SHIP
CAVOTEC MICRO-CONTROL MC-RX-RLS RELAY M5-1032-0290 REV.3.0
CAVOTEC MODULE PCB M9-1040-3001 DNV-2003-OSL-ATEX-0087
CAVOTEC MODULE PCB M9-1040-3001 DNV-2003-OSL-ATEX-0087 REV.5 / FAST SHIP
CBM ELECTRONICS 212800 POWER SUPPLY BOARD
CBM ELECTRONICS 212800 POWER SUPPLY BOARD
CCI POWER SUPPLY VT25-373-99/X9 20-60VDC 3A
CCI POWER SUPPLY VT25-373-99/X9 20-60VDC 3A
CCT Dia 1-23262 PCB Controller 5/1772, 1/23264 Iss 1
CEAG GHG5113306R0001 EXPLOSION PROOF COUPLER
CEAG GHG5113306R0001 EXPLOSION PROOF COUPLER
CEAG GHG5113306R0001 EXPLOSION PROOF COUPLER
CEAG GHG5113306R0001 EXPLOSION PROOF COUPLER
CEAG GHG5728104R5901 EXLINK HAZARDOUS AREA HOT SWAP CONNECTOR
CEAG VE97236-1 EMERGENCY INVERTER 110-127V 2710-3
CEAG VE97236-1 EMERGENCY INVERTER 110-127V 2710-3
CEGELEC 1050180 PCB R18CW109368 HIGH VOLTAGE
CEGELEC 1050180 PCB R18CW109368 HIGH VOLTAGE
CEGELEC 23X2608BRL OPTIONS BOARD 23X2608 T040-80002
CEGELEC ALSPA GD3000E 20X4249A4 Controller Alstom
CEGELEC ALSPA GD3000E 20X4249A4 Controller Alstom
CEGELEC CARD MAE95-08 SIF-A0 pcb circuit
CEGELEC CARD MAE95-08 SIF-A0 pcb circuit
CEGELEC CONTROLS 20X4454A1 INTERFACE BOARD 20X4454A1L
CEGELEC CONTROLS ALN 0813 PCB CARD
CEGELEC CONTROLS ALN 0813 PCB CARD
CEGELEC CONTROLS ALN 0813 PCB CARD
CEGELEC CONTROLS ALN 0813 PCB CARD
CEGELEC CONTROLS MAE95-01 ISS D PCB CARD
CEGELEC CONTROLS MAE95-01 ISS D PCB CARD
CEGELEC CONTROLS MAE95-01 ISS D PCB CARD
CEGELEC CONTROLS MAE95-01 ISS D PCB CARD
CEGELEC CONTROLS MAE95-01 PCB CARD ARTWORK ISS. D
CEGELEC CONTROLS MAE95-01 PCB CARD ARTWORK ISS. D
CEGELEC CONTROLS MAE95-02 PCB CARD
CEGELEC CONTROLS MAE95-02 PCB CARD
Cegelec controls s20x4285/10 pcb card 20x4285a1l Power supply card
CEGELEC MAE95-02 PCB CARD
CEGELEC MAE95-02 PCB CARD
CEL 7508-0810 PANEL DRIVER BOARD 7508-081Z-01 75080810
CENTRALP AUTOMATISMES 100093-0/H PC BOARD 8468043
CENTRALP AUTOMATISMES 100093-0/H PC BOARD 8468043
CENTRALP AUTOMATISMES 100093-0/H PC BOARD 8468043
CENTRALP AUTOMATISMES 100093-0/H PC BOARD 8468043
CERBERUS S610 IR FLAME DETECTOR 319047
CERBERUS S610 IR FLAME DETECTOR 319047
CERBERUS S610 IR FLAME DETECTOR 319047
CERBERUS S610 IR FLAME DETECTOR 319047
CERUTTI RE 36223 SIGNAL AMPLIFIER CONTROL CARD RE36223
CERUTTI RE 52017 REGULATOR CONTROL CARD RE52017
CERUTTI RE 52017 REGULATOR CONTROL CARD RE52017
CEWE INSTRUMENT DF 127 FREQUENCY TRANSDUCER TRDFO02
CEWE INSTRUMENT DP234 TRANSDUCER DP FOR ACTIVE POWER