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6ES5526-3LF01
PLC向开放性发展
早期的PLC缺点之一是它的软、硬件体系结构是封闭而不是开放的，如专用总线、通讯网络及协议、I/O模块更互不通用，甚至连机架、电源模板亦各不相同，编程语言之一的梯形图名称虽一致，但组态、寻址、语言结构均不一致，因此，几乎各个公司的PLC均互不兼容。目前，PLC在开放性方面已有实质性突破。十多年前PLC被攻破的一个重要方面就是它的专有性，现在情况有了极大改观，不少大型PLC厂商在PLC系统结构上采用了各种产业标准，如IEC61131-3、IEEE802.3以太网、TCP/IP、UDP/IP等。例如，AEGSchneider团体已开发以PLC机为基础，在Windows平台下，符合IEC61131-3国际标准的全新一体系结构的PLC实现高度分散控制，开放度高。高度分散控制是一种全新的产业控制结构，不但控制功能分散化，而且网络也分散化，所谓高度分散化控制，就是控制算法常驻在该控制功能的节点上，而不是常驻在PLC上或PC上，凡挂在网络节点上的设备，均处于同等的位置，将“智能”扩展到控制系统的各个环节，从传感器、变送器到I/O模块，乃至执行器，无处不采用微处理芯片，因而产生了智能分散系统（SDS）。
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为了使PLC更具开放性和执行多任务，在一个PLC系统中同时装几个CPU模块，每个CPU模块都执行某一种任务。例如三菱电机公司的小Q系列PLC可以在一个机架上插4个CPU模块，富士电机的MICREX-ST系列最多可在一个机架上插6个CPU模块，这些CPU模块可以进行专门的逻辑控制、顺序控制、运动控制和过程控制。这些都是在Windows环境下执行PC机任务的模块，组成混合式的控制系统。
近几年，众多PLC厂商都开发了自己的模块型I/O或端子型I/O，而通讯总线都符合IEC61131-3标准，这极大的增强了PLC的开放性。
创建开放的网络环境后，推出了能挂100M的高速以太网的WEB服务器模块，三菱电机公司小Q系列的QJ71WS96，横河电机FA-M3系列的F3WBM1-0T-S0；模块内的软件捆绑了目前常用的TCP/IP、UDP/IP等传输层和网络层规约，以及HTTP、FTP、SMTP、POP3等应用层规约，使PLC可直接进进因特网，成为不折不扣的WEB的PLC。
3、PLC的体积小型化，运算速度高速化
PLC小型化的好处是节省空间、降低本钱、安装灵活。目前一些大型PLC，其外形尺寸比他们前一代的同类产品的安装空间要小50%左右。
近几年，很多PLC厂商推出了超小型PLC，用于单机自动化或组成分布式控制系统。西门子公司的超小型PLC称通用逻辑模块LOGO！，它采用整体式结构，集成了控制功能、实时时钟和操纵显示单元，可用面板上的小型液晶显示屏和6个键来编程。LOGO！超小型PLC使用功能模块图FBD编程语言，有在PC上运行的Windows98/NT编程软件。
三菱电机的超小型PLC叫简单应用控制器，简称α并有AL-PCS/win-C型VLS软件，是强有力且界面友好的编程工具。松下电工的超小型PLC叫可选模式控制器。德国金钟—默勒公司（MOELLER）的超小型PLC称控制继电器，简称easy。
运算速度高速化是PLC技术发展的重要特点，在硬件上，PLC的CPU模块采用32位的RISC芯片，使PLC的运算速度大为进步，一条基本指令的运算速度达到数十个纳秒（ns）。三菱电机公司的ANA系列PLC最早使用32位的CPU模块，当今它的Q02H系列PLC的CPU模块也用了32位的RISC芯片，基本指令的执行时间为34ns；富士电机MICREX-SX系列PLC的CPU模块由于采用了32位RISC芯片后，其一条基本指令的运算时间为20ns。
PLC主机运算速度大大进步，与外设的数据交换速度也呈高速化。大家知道，PLC的CPU模块通过系统总线与装插在基板上的各种I/O模块、特殊功能模块、通讯模块等交换数据，基板上装的模块越多，PLC的CPU模块与那些模块之间的数据交换的时间就会增加，在一定程度上会使PLC的扫描时间加长，为此，不少PLC厂商采用新技术，增加PLC系统的带宽，使一次传输的数据量增多；在系统总线数据存取方式上，采用连续成组传送技术实现连续数据的高速批量传送，大大缩短了存取每个字所需的时间；通过向系统总线相连接的模块实现全局传送，即针对多个模块同时传送同一数据的技术，有效地活用系统总线。
当前，不少PLC厂商采用了多CPU芯片并行处理方式，用专门CPU处理编程及监控服务，大大减轻对执行控制程序的CPU芯片的影响，只让执行控制程序的CPU进行顺控和逻辑运算。另外，为进步服务处理速度，缩短操纵时间，采用高速的串行通讯（最大波特率为115Kbps），并将UCB口（最大波特率为12Mbps）引进PLC的CPU模块，从而实现与编程工具及监控设备之间通讯的高速化，并答应很多人同时使用这两个通讯端口同时进行编程和调试程序。
FANUC ROBOTICS MAIN PROCESSOR CPU PCB A16B-3200-0040/?07D
ALLEN BRADLEY PROCESSOR MASS STORAGE 1770-M11 SER. B
HF ConTROLS CIRCUIT BOARD AFS-LOS-01
BAILEY ConTROLS NETWORK 90 USER ConTROL KEYBOARD 6634967C1
ALLEN BRADLEY ENCODER / COUNTER MODULE 1771-IJC *LOT OF 2*
FANUC ROBOTICS MEMORY DAUGHTER BOARD PCB A20B-2902-0530/?01A
ULTIPATH MACHIENE I/O ConTROL BOARD 415-0621-902
ALLEN BRADLEY 0.37-0.75KW 1/2-1HP 460V DINAMIC BRAKE MODULE 160-BMB1 SER. A *NEW
FANUC RELAY OUTPUT MODULE AOR08G A03B-0819-C160 *MISSING DOOR*
SIERRA INNOVA-FLO MASS FLOW METER 221-LS-E4-DD-ST?-V4-CM
MITSUBISHI ELECTRIC POWER BOARD BC186A423G53
ALPHA OMEGA COMPUTER SYSTEMS CPU BOARD 901-0014 / STD CPU-80A
INGERSOLL RAND SINGLE CHANNEL METER 93817393
ASCO RED-HAT II 5-150PSI SOLENOID VALVE EF8210G003 *NIB*
SQUARE D VARIABLE FREQUENCY DRIVE POWER INTERFACE BOARD 520II-390-53
MARATHON MonITORS INC. 10 PRO ConTROLLER MMI F810135 949491399 *PLASTIC*
MOORE PRODUCTS AUTOMATION ConTROLLER 882F1C-001
GRAIN SYSTEMS INCORPORATED GSI GRAINBIN ConTROL BOARD PCB370-RP04
GRAIN SYSTEMS INCORPORATED GSI GRAINBIN ConTROL BOARD PCB370-RP02 *FUSE*
MEDAR HAND HELD TERMINAL 937-0007V1
GE FANUC PC BOARD A20B-0009-0150/?09B
FANUC ROBOTICS ETHERNET REMOTE PCB ER1T BOARD A16B-2203-0290/?02A
STANLEY Q3000 SIGMA MODULE SG-SIGMA-202-00?1 REV. C
CHARMILLES TECHNOLOGIES ConTROL BOARD 851 5250
CHARMILLES TECHNOLOGIES ConTROL BOARD 851 4040 C
CHARMILLES TECHNOLOGIES ConTROL BOARD 852 8620 A
CHARMILLES TECHNOLOGIES ConTROL BOARD 851 5040 D
TAPESWITCH ZCA-1 AUTO RESET ZONE MonITORING ConTROLLER B121005CH,SPL
SOUTHWORTH SMARTLIFT HAND ConTROL LIFT OPERATOR 10003643 *NIB*
LINCOLN ELECTRonICS REMOTE OUTPUT ConTROL K857 *NIB*
AMCI PLC SERIES ENCODER MODULE 7751
AMCI ADVANCED MOTION ConTROLS PLC SERIES ENCODER MODULE 1731
ROSEMOUNT 1151 SMART ALPHALINE PRESSURE TRANSMITTER 1151DP4S52B1DF
ALLEN BRADLEY ConTROL LOGIX 13-SLOT CHASSIS 1756-A13/B
INTEL 915GAV SERVER BOARD 01040 NIB
LEUKHARDT 24VDC MIOS dI/O AM-1.03 ConTROLLER 6219102
LEUKHARDT 24VDC MIOS dI/O DK-1.05 ConTROLLER 6219100
ALLEN BRADLEY MEMORY BOARD 8000-MDA REV. C
INDRAMAT SOFTWARE MODULE DSM 2.1-S11-01.15
FANUC ROBOTICS I/O C5 BOARD A16B-1212-0222/?02A
ALLEN BRADLEY IMC-120 SERVO ConTROLLER MODULE 1771-HSN/B F/W REV. 1.04
ABB ROBOTICS ROBOT ConTROLLER MODULE DSQC 230 YB560103-BN
ALLEN BRADLEY 1HP/2HP DC MOTOR ConTROLLER 1365-SAN
DAYTRonIC DIGITAL INDICATOR MODULE 9515A/000
DAYTRonIC DIGITAL INDICATOR MODULE 9515A/002
DAYTRonIC DIGITAL INDICATOR MODULE 9515A
ALLEN BRADLEY PRESSURE ConTROL SWITCH 836T-T251J SER. B *NEW*
BRYANT ConTROL BCI GP3 REV-A NIB
ALLEN BRADLEY Compact I/O DC OUTPUT MODULE 1769-OV32T SER. A
ZELLWEGER ANALYTICS ConTROL BOARD 130134 REV. 6
MARPOSS ConTROL BOARD 6366323703
INDRAMAT OPERATOR INTERFACE POWER SUPPLY BOARD LK BMC 4/02
BALANCE TECHNOLOGY ConTROL CARD D-34060 REV. G
ConTEMPOARY ConTROLS FANUC ARCNET NETWORK INTERFACE CARD PCA66-TPB
INDRAMAT ConTROL BOARD PCB CPU 3-04/00
EGAN RELAY DRIVER BOARD 435339-2 REV. 3 NNB
GIDDINGS & LEWIS CPU BOARD 501-03761-02
SIEMENS DIGITAL INPUT MODULE ET 200B-32DI
SIEB & MEYER TYPE M5 SERVO ConTROLLER 26-44-14
CHARMILLES TECHNOLOGIES ConTROL BOARD PCB 851 7060 D / CT8121660D
CHARMILLES TECHNOLOGIES ConTROL BOARD PCB 208518320 C 8669340B
ALLEN BRADLEY 24VDC 4 SOURCING OUTPUT MODULE 1792D-0B4DX4 SER.B
DAYTRonIC DIGITAL INDICATOR MODULE 9530A W/ 9585A/000
MILLER WELDING I/O INTERFACE BOARD PCB 210700 *NEW*
ALLEN BRADLEY PanelView POWER SUPPLY BOARD 77135-217-51
ALLEN BRADLEY 24VDC DeviceNet ADAPTER MODULE 1734-ADNX SER. A *NEW*
GSE TORQUE ConTROLLER BOARD KDM 40-20-30777 / PC804E
SCHNEIDER MODICON TSX COMPACT HIGH SPEED COUNTER MODULE AS BZAE 201
OMRON 24VDC REMOTE TERMINAL, SRT2-ROF08, NNB
FANUC ROBOTICS BUBBLE MEMORY BOARD A16B-1211-0091/?06C
CHARMILLES TECHNOLOGIES ConTROL BOARD KCB-05G / 690.364.5
CHARMILLES TECHNOLOGIES SIGNAL ANALOG DIGITAL DRIVER BOARD ADD-04C / 615.971.9
MITSUBISHI ELECTRIC MELSEC-Q DATA link UNIT QJ71LP21-25
ALLEN BRADLEY PanelView 1000 ConTROL BOARD 77144-209-71
WAGO DeviceNet COUPLER MODULE 750-306/000-005 *LOT OF 5*
MARATHON MonITORS INC CARBPRO ConTROLLER / PROGRAMMER *MISSING COVER*
MICRO MEMORY INC. MEMORY BOARD MM-6702
VICKERS MAGNETO STRICTIVE CARD 884980
ABB ROBOTICS ANALOG I/O BOARD DSQC 224
MARATHON MonITORS INC UNIPRO ConTROLLER / PROGRAMMER
PEPPERL + FUCHS FREQUENCY-VOLTA?GE ConVERTER KFU8-FSSP-1.D / Y180599
CHARMILLES TECHNOLOGIES POWER MODULE OUTPUT BOARD PMO-02E / 621.932.3
CHARMILLES TECHNOLOGIES POWER MODULE OUTPUT BOARD PMO-01F / 616.091.5
ALLEN BRADLEY CNC ConTROL BACKPLANE BOARD 8000-GA
PINNACLE MICROGUARD LIGHT CURTAIN ConTROLLER MG-32-AB-AU-24V?DC *DAMAGED*
DIETERICH STANDARD DART II FLOW ConTROL DFCII 1MN2XX3XX4MNP1E?PRXTXAXYXDS STD
STI 24VDC 6 INPUT SAFETY MAT ConTROLLER MC4-0006
EMERSON INDUSTRIAL ConTROLS 190/380VDC 12A DRIVE ES2600FRG
SHARP JW10 PROGRAMMABLE ConTROLLER BASIC MODULE JW-1642K *NO COVERS*
FANUC ROBOTICS SDU1 DETECTOR INTERFACE MODULE A02B-0236-C203
ALLEN BRADLEY OPERATOR PANEL ConTROL BOARD 8500-MTBI
ALLEN BRADLEY 16 PT DC DIAGNOSTIC INPUT 1756-IB16D/A 96195074 *MISSING DOOR*
OMRON STI MC3 SERIES MAT ConTROLLER 42767-0010 *NIB*
ATI INDUSTRIAL AUTOMATION MODULE 9120-R26-M *NIB*
MOVOMATIC MEASUREMENT ConTROL MOV 4410Y
MOVOMATIC MESELTRON MEASUREMENT ConTROL MOV 4410
SIEMENS SINUMERIK COMPACT PLC BACKPLANE 6FC5111-0CA73-0?AA1
RAYMOND STEER MANAGER ConTROLLER INTERNAL ASSEMBLY 136-010-702-001 REV. A
ABB ROBOTICS BRAKE RELEASE UNIT 3HAC 14219-1 REV. 02 *NNB*
FANUC ETHERNET REMOTE PCB A16B-2201-0890/?03A WITH A20B-9001-0610/?02A
FANUC ETHERNET REMOTE PCB A16B-2201-0890/?02A WITH A20B-9001-0610/?02A
ANALOG DEVICES ISOLATED RTD INPUT MODULE 3B34-03
INDRAMAT INCREMENTAL POSITION INTERFACE CARD DEF 1.1
TELEMECANIQUE PREVENTA SAFETY RELAY FOR E-STOP / LIGHT CURTAIN XPS-AR
ABB ROBOTICS DRIVE ConTROL BOARD DSQC 236C YB560103-CC/5
ABB ROBOTICS DRIVE ConTROL BOARD DSQC 236C YB560103-CC/11
CHARMILLES TECHNOLOGIES ConTROL BOARD 851 8090 B
CHARMILLES TECHNOLOGIES ConTROL BOARD 852 9010
ABB ROBOTICS DRIVE ConTROL BOARD DSQC 236C YB560103-CC/7
ABB ROBOTICS DRIVE ConTROL BOARD DSQC 236C YB560103-CC/9
TRW NELSON ConTROL BOARD KAS-INTER 1 66-03-82 EC-05-59
ROSEMOUNT 1151 SMART ALPHALINE PRESSURE TRANSMITTER 1151DP4S52
MITSUBISHI ELECTRIC CNC SYSTEM CHASSIS FCA C3M30
MODICON 50 SCREW TERMINAL MOTION MODULE FIELD WIRING BLOCK, 690-MCB-000-00 *NEW*
WAGO 0-10VDC 2 CHANNEL ANALOG INPUT MODULE 750-478 *NEW*
ESCORT MEMORY SYSTEMS MICROMUX INTERFACE MODULE MM80
FESTO FENG 50-50-KF90/ DNG 50-50-PPVA
FANUC DAUGHTER BOARD A20B-2902-0550/?01A *LOT OF 2*
ALLEN BRADLEY 1794-OB16 FLEX DIGITAL 16 CURRENT SOURCING DC OUTPUT MODULE, NNB
ALLEN BRADLEY SLC 500 OUTPUT MODULE 1746-0G16 SER. C *NEW*
KEYENCE KV-24AR PROGRAMMABLE LOGIC ConTROLLER W/ BUILT-IN DISPLAY base UNIT, NNB
CROMPTON INSTRUMENTS 256-TWMU PALADIN TRANSDUCER, NNB
AEG MODICON PROM MEMORY CARTRIDGE AS-E380-902
KAWASAKI 50999-1545 PC BOARD, NIB, SEALED IN BAG
GE FANUC PROGRAMMABLE ConTROLLER 12-24 VDC 13W IC620MDR128C
FESTO, PNEUMATIC LINEAR DRIVE UNIT, SLE-25-300-KF-A?-G-YV-YH
MODICON DEP 209 INPUT MODULE, MANUFACTURER REFURBISHED
ALLEN BRADLEY 1785-05B SERIES A BROAD, NIB
CARRIER 660 005 MOTOR ConTROL KIT, NIB
PHOENIX ConTACT INTERBUS INLINE INPUT TERMINAL BLOCK, 2726285 *NEW*
ABB ROBOTICS 13-SLOT BACKPLANE BOARD, DSQC 229 / 2668 402-143/1
MODICON / GOULD MM-PMSC-000 CABLE ASSEMBLY, NIB
MODICON / GOULD MM-PMSC-000 CABLE ASSEMBLY, NEW
FANUC ROBOTICS TEACH PENDANT ConTROL BOARD A20B-1002-0980/?03B
SONY 24VDC INPUT UNIT SOMIC-OPTC-IN8-?CHAT
SAFE7SCAN DOLAN JENNER RAC0651588 CURTAIN SENSOR
AMBITECH 5HP ELECTRonIC MOTOR ConTROL SS-5G-5M
WTC TIMER MODULE GA03-T14A
UNICO CENTRAL PROCESSING UNIT CPU 314887 REV. 10
TECH MOTIVE TORQUE TOOL ConTROL MODULE 49-4100-03C5 REV. B
ALLEN BRADLEY 6 DIFFERENTIAL INPUTS ANALOG INPUT EXPANDER MODULE 1771-E2C
FANUC ROBOTICS SERVO PULSECODER aA64 A860-0360-T201
VEE-ARC DYNAMIC BRAKING BOARD 930-074 *NEW*
SIEMENS 380-480V 36A BASIC LINE FILTER6SL3000-0?BE21-6DA0
ROSEMOUNT ALPHALINE 0-100 PSI PRESSURE TRANSMITTER 115 1GP6E22
BROOKS MT 3810 VARIABLE AREA FLOWMETER TRANSMITTER 3810A12B1RAA1Q1
BROOKS MT 3810 VARIABLE AREA FLOWMETER TRANSMITTER 3810A11B1RAA1A1
FESTO 24VDC 87PSI 6BAR ConTROL MODULE IC-8M33/2-2
ABB HART 2600T SERIES PRESSURE TRANSMITTER 264DRGSRRSA1 *PROBE*
DATALOGIC AUTOMATIC ID MODULE CM1000
FANUC ROBOTICS ACCUFLOW COUNTER INPUT EE-1063-001 *LOT OF 3*
TEST PRODUCTS T51105-3158 VEHICLE DATA DISPLAY, REPAIRED
ALLEN BRADLEY Flex I/O ISOLATED ANALOG INPUT MODULE 1794-IF4I SER A W/ base
PEAKTRonICS 117 VOLT AC MOTOR ConTROLLER AMC-100
BARBER COLEMAN MACO 8000 MEMORY CARTRIDGE A-13025-202 *NEW*
AEG MODICON 24 VDC OUTPUT MODULE AS-B838-032 B838 *REPAIRED*
ALLEN BRADLEY PLC-5/30 PROCESSOR MODULE, 1785-L30B SER. D
FANUC PCB DAUGHTER BOARD A20B-2900-0530/?02A
FESTO 8-10BAR MANIFOLD ASSEMBLY CPV-18-VI 50446
NAMCO 10-30VDC 4-PIN POWER CLAMP KIT EE280-91100 *NEW*
BARKSDALE TYPE 4 250VDC 600VAC TEMPERATURE SWITCH MT1H-L251-A *NEW*
IBP PHYTRON POWER SUPPLY CARD BD 300 2001900
BALLUFF BNS-519-D02-K16?-062-10 NIB
BALLUFF BNS816-B03-WS-1?2-602-11
GOULD MODICON REMOTE I/O PROCESSOR PCB S908-000 REV A
FANUC PCB DAUGHTER BOARD A20B-2902-0531/?01A
NUMATICS 8 ConNECTOR I/O MODULE 239-1315
PILZ 110VAC, 24VDC SAFETY RELAY PNOZ X3 110VAC 24VDC 3n/o 1n/c 1so
FANUC 24VDC, 0.25A OUTPUT MODULE OD64A A03B-0801-C141
IDEC IZUMI ANALOG INPUT UNIT PFJ-N013A
ALLEN BRADLEY SLC500 PROCESSOR 1747-L542 SER B REV 3 OS # 1747-OS401 SER B FRN 7
FANUC PCB DAUGHTER BOARD A20B-2901-0415/?01A
ALLEN BRADLEY 24VDC 16 POINT SINK SOURCE INPUT MODULE 1792D-16BVT0D SER. A
AEG MODICON PROGRAMMABLE ConTROLLER MODULE PC-E984-381
ALLEN BRADLEY ArmorBlock I/O MODULE 1792-IB16A SER. B
FANUC PCB DAUGHTER BOARD A20B-2902-0070/?08D
ATI TOOL CHANGER MODULE MT8T *NEW*
NSD CORPORATION ABSOCODER ConVERTER MODULE VM-2A-16
FANUC ROBOTICS PCB DAUGHTER BOARD A20B-2900-0480/?B2A
RELIANCE ELECTRIC CPU MODULE O-57407-4B
DANFOSS ConTROL BOARD DDI016 REV 1.3
SUPERIOR ELECTRIC 3.5A 30V TRANSLATOR DRIVE MODULE 430-T
ALLEN BRADLEY 16 PT DC DIAGNOSTIC INPUT 1756-IB16D/A *MISSING WIRING TERMINAL*
TELEMECANIQUE COUNTER MODULE TSXAXT200
SICK 12 POLE MALE / FEMALE CORDSET 7029162 *NEW*
SCHNEIDER MODICON TSX PREMIUM PROCESSOR MODULE TSXP5710
SIEMENS PROFIBUS-DP ET 200S INTERFACE MODULE 6ES7 151-1AA03-0AB0
WEIDMULLER PLC MODULE BOARD 350122
SIEMENS SIMATIC S7 ANALOG HIGH SPEED INPUT MODULE 6ES7 134-4FB51-0AB0
TELEMECANIQUE LOCAL CHAINING JUNCTION TSXLES62
IFM ELECTRonIC FREQUENCY / SPEED MonITOR FR-2 DD2006
PHOENIX ConTACT INTERBUS 2 RTD INPUTS MODULE IB STME 24 PT 100 4/4