发货地址:山西太原杏花岭区
信息编号:233601928,公司编号:23041054
产品规格:不限
产品数量:999.00 个
包装说明:原包装
产品单价:面议
官方网址:http://15340667322.b2b168.com/
这是因为以太网和TCP/IP协议并不适合于工业的现场层面或者实时层面的通信,其抢占式的总线结构使时间的可靠得不到保、多层次的封装导致效率的低下,对于的保贵机时浪费太多、开放过度导致的安全不够等。对于IP的反思在通信行业上已得到广泛的认同,原本想在3G的时代一定会是IP的天下,但实际的情况发现,在通信中的主干环节IP仍然因为效率低下而无法满足要求(很多国际大公司都在彻底IP的理想上面吃了苦头),而不得不退回去仍使用ATM之类的精干协议。
当然很多朋友会提到现在的速度日益上升而成本日益下降,网络带宽日益上升收费日益下降,对于我提出来的这些问题均可以简单解决(实际上如果您亲身开发或者使用后就觉得全不是那回事)。
后面,我预言未来互联网大的用户一定是不是人,而是机器,而是开关,而是每个灯泡,当网络进入装备和家居后,一个节点的成本低于50元是可以实现的。今后的网络必然不是GOOGLE之类的,而是设备网,如果能有一个制定标准一统江湖的设备网(为用户提供人与设备的接口),那才是大的市场,现场总线加网关上互联网一定会是今后十年好的方案。
多协议、多层次、网络、行业总线将是未来十年现场总线发展的方向,不要跟风,不要选择时髦的不适合你应用的网络或者总线,按应用的场合,未来我们也许真的需要8种现场总线,当然一定不是现在这13种,而是根据应用的场合不同来选择的,同时支持多种协议的网关芯片也将随着装备技术和芯片技术的发展而日益成熟。
PC_BASE刚出现时也是在工控界引起了很大的反响,那个时代的控制器都是相当贵的,我记得当时一块西屋公司WDPF控制系统的250M硬盘卖5万块,而PC硬件的低成本对于大家来说是相当大的吸引力。当时的工程师分为两派,一派认为PC是为商用开发的,控制界只能吸收其有用的技术,而另一派认为PC技术的广泛应用,有如此之多的软件和硬件资源可供利用,对于控制器的标准化和降低成本有很大的好处。
在这个过程中,国内的工控厂商包括DCS、PLC和各种专用控制器都广泛的采用了PC_BASE结构来开发新产品,当时大多使用386和486,其中ICOP的386X_M6117D是其中好的工业级386 ,可惜我只能买到M6117C所以只好改用了MAPLE的486DX4-100M。
Allen Bradley 1336F-BRF150-AE-EN 1336 Plus2 Sensorless Vector 15KW Inverter
Allen Bradley 1336F-BRF20-AE-EN Allen Bradley 1336 Sensorless Vector Drive.
Allen Bradley 1336F-BRF50-AE-EN Allen Bradley 1336Plus2 5.5Kw Inverter
Allen Bradley 1336F-BRF75-AE-EN Allen Bradley 1336 Inverter 5.5KW
Allen Bradley 1336F-BRF75-AE-FR Allen Bradley 7.5Kw Inverter
Allen Bradley 1336PLUS Allen Bradley 1336PLUS Inverter
Allen Bradley 1336S-B010-AE-EN Allen Bradley 1336 13Kva Inverter
Allen Bradley 1336S-B015-AA-DE Allen Bradley 1336 15Kw Inverter
Allen Bradley 1336S-B015-AA-EN Allen Bradley 1336 Plus Inverter 15KW
Allen Bradley 1336S-B020-AE-EN Allen Bradley 1336 Plus 20 Kw Inverter
Allen Bradley 1336S-B030-AE-DE-HA2-L5 Allen Bradley AC Drive
Allen Bradley 1336S-B030-AE-EN4 Allen Bradley 1336PLUS Inverter
Allen Bradley 1336S-B075-AN-EN 1336 75Kw Inverter
Allen Bradley 1336S-B125-A-EN Allen Bradley AC Drive 138kva 173A
Allen Bradley 1336S-BRF75-AE-FR4 1336 Plus Sensorless Vector AC Drive
Allen Bradley 1336VT-B030-EOR Allen Bradley Bulletin 1336VT 40 Amp Inverter
Allen Bradley 1388-AV60 Bulletin 1388 DC Servo Drive
Allen Bradley 1388B-AV40 Allen Bradley Bulletin 1388 20A DC Servo Drive
Allen Bradley 1389-AA09-A01 Allen Bradley 3.3Kw Servo Drive
Allen Bradley 1389-PAT10 Allen Bradley Bulletin 1389 Power Supply
Allen Bradley 1389-PAT10HR Allen Bradley Bulletin 1389 Power Supply
Allen Bradley 1391-AA15 Allen Bradley 1391 5.5Kw Servo Drive
Allen Bradley 1391-DES45-D1 Allen Bradley 1391 45A Axis Servo Drive
Allen Bradley 1391B-AA15 Allen Bradley Bulletin 1391 5.5Kw Servo Drive
Allen Bradley 1391B-AA45 Allen Bradley Bulletin1391 14KW Servo Drive
Allen Bradley 1394-AM03 Allen Bradley Bulletin 1394 2Kw AC Servo Drive
Allen Bradley 1394-AM04 Allen Bradley Bulletin 1394 3KW AC Servo Drive
Allen Bradley 1394-AM05 Allen Bradley Bulletin 1394 5Kw AC Servo Drive
Allen Bradley 1394-AM07 Allen Bradley 1394 AC Servo Controller
Allen Bradley 1394-SJT05-A Allen Bradley 1394 Digital Servo With Analog Contr
Allen Bradley 1394-SJT05-C-RL Digital Servo Controller (5kW Standard Version)
Allen Bradley 1394-SJT05-T Allen Bradley 1394 5Kw Servo Controller
Allen Bradley 1394-SJT05-T-RL Digital Servo Controller (5kW Turbo Version)
Allen Bradley 1394-SJT10-T-RL Allen Bradley 1394 Digital Servo Controller
Allen Bradley 1394C-AM03 Allen Bradley Bulletin 1394 2KW AC Servo Drive
Allen Bradley 1394C-AM50 Allen Bradley Bulletin 1394 10 KW AC Servo Drive
Allen Bradley 1394C-SJT05-D Allen Bradley Bulletin 1394 Digital Servo Control
Allen Bradley 1394C-SJT05-T Allen Bradley Bulletin 1394 Digital Servo Control
Allen Bradley 1395-A66N-C1-PZ Allen Bradley 1395 5.6Kw DC Drive
Allen Bradley 1397-B020N-FS2010-HA2-PE Allen Bradley 38 Amp 1397 DC Drive
Allen Bradley 1398-DDM-009 Allen Bradley Ultra Series Drive
Allen Bradley 1398-DDM-019 Allen Bradley Ultra Series Drive
Allen Bradley 1398-DDM-075 Allen Bradley Ultra Series Drive
Allen Bradley 1398-PDM-030 Allen Bradley Ultra Series Servo Drive
Allen Bradley 1398-PDM-150 Allen Bradley 65A AC Servo Drive
Allen Bradley 1404-M405A-ENT Allen Bradley Powermonitor 3000 Module
Allen Bradley 150-A135NBD SMCPLUS Soft Start
Allen Bradley 150-A15NBD Bulletin 150 Soft Start
Allen Bradley 150-A35NB SMC-2 Soft Start 22KW
Allen Bradley 150-A500NBD SMC Plus Soft Start Unit.
Allen Bradley 150-A54NBD SMCPLUS Soft Start
Allen Bradley 150-A68NB SMC2 37KW Soft Start
Allen Bradley 150-A97NBD Allen Bradley SMS Plus 55Kw Soft Start
Allen Bradley 150-B360NBD Allen Bradley Soft Start
Allen Bradley 150-D74NBD Allen Bradley SMC-Delta 74 Amp Soft Start
Allen Bradley 150-F135NBD Allen Bradley SMS-Flex Soft Start
Allen Bradley 160-BA01NPS1 Allen Bradley 0.37Kw Inverter
Allen Bradley 160-BA01NSF1P1 Allen Bradley 0.37Kw Inverter
Allen Bradley 160-BA02NPS1 Allen Bradley 160-DN2. 0.55KW AC Drive
Allen Bradley 160-BA04NSF1 Allen Bradley 1.5Kw Inverter
Allen Bradley 160-BA06NSF1 Allen Bradley 2.2Kw Inverter
Allen Bradley 160-BA10NPS1 Allen Bradley Inverter
Allen Bradley 160-BA10NSF1 Allen Bradley 3.73KW Inverter
Allen Bradley 160-BMB1 Dynamic Breaking Module
Allen Bradley 1606-XL240E Allen Bradley 8A Power Supply
Allen Bradley 160S-AA02NPS1 Allen Bradley 0.37Kw Inverter
Allen Bradley 160S-AA02NPS1 Allen Bradley 0.37Kw Inverter
Allen Bradley 160S-AA02NSF1 Allen Bradley 0.37Kw Inverter
Allen Bradley 160S-AA03NPS1 Allen Bradley 0.55Kw Inverter
Allen Bradley 160S-AA03NSF1 Allen Bradley 160S Bulletin .55KW. Inverter
Allen Bradley 161S-AA02NPK Allen Bradley 0.4Kw Inverter
Allen Bradley 1745-E105 SLC100 Brick Type PLC
Allen Bradley 1745-LP101 SLC 100 Programmable Controller
Allen Bradley 1745-LP151 SLC 150 Programmablr Controller
Allen Bradley 1745-PT1 Allen Bradley SLC100 Programming
Allen Bradley 1746-1B8 SLC 500 Input Card
Allen Bradley 1746-A10 SLC 500 10 Slot Rack
Allen Bradley 1746-A10 Allen Bradley 10 Slot Rack
Allen Bradley 1746-A7 SLC 500 7-Slot Rack
Allen Bradley 1746-BAS Allen Bradley SLC500 Basic Module
Allen Bradley 1746-DB Allen Bradley Basic Module
Allen Bradley 1746-FIO4V Allen Bradley SLC500 4 Channel Analog I/O Module
Allen Bradley 1746-HS Allen Bradley Motion Control Module
Allen Bradley 1746-HSCE SLC500 High Speed Counter Encoder Input Module
Allen Bradley 1746-IA16 SLC500 Input Module 16 way
Allen Bradley 1746-IB16 SLC500 16 Channel 24vdc Input Module
Allen Bradley 1746-IB32 Allen Bradley SLC500 32 Channel Input Module
Allen Bradley 1746-ITV16 Allen Bradley SLC500 16 Channel Input Module
Allen Bradley 1746-N14 SLC500 Analogue Input Module
Allen Bradley 1746-N18 SLC 500 Analogue Input Module
Allen Bradley 1746-N2 SLC 500 Blacking Module
Allen Bradley 1746-NI04I SLC500 Analogue Input Module
Allen Bradley 1746-NI16I Allen Bradley SLC500 Analog Current Input Module
Allen Bradley 1746-NI4 Analog Input Module
Allen Bradley 1746-NO41 SLC500 Analog Output Module
Allen Bradley 1746-NR4 SLC500 RTD/Resistance Input Module
Allen Bradley 1746-NR8 Allen Bradley SLC800 8 Channel RTD Input Module
Allen Bradley 1746-OA16 SLC500 16 Channel 0.5Amp AC Output Module
Allen Bradley 1746-OB16 SLC500 16 Channel Output Module
Allen Bradley 1746-OB32 SLC500 32 Channel 5-50VDC Output Module
Allen Bradley 1746-OB8 8 Channel 10-50VDC 1A Ouput Module
Allen Bradley 1746-OBP8 Allen Bradley 8 Channel Output Module
Allen Bradley 1746-OV16 SLC 500 Output Module
Allen Bradley 1746-OW16 SLC500 16 Channel Output Module
Allen Bradley 1746-OW8 SLC500 Output Card
Allen Bradley 1746-OX8 SLC500 8 Channel Relay Output Module
Allen Bradley 1746-ox8 Isoterix ISO 1006/7A Temperature Controller
Allen Bradley 1746-P1 SLC500 PLC Power Supply
Allen Bradley 1746-P2 SLC500 PLC Power Supply
Allen Bradley 1746-P3 SLC500 PLC Power Supply
Allen Bradley 1746-P4 SLC500 PLC Power Supply
Allen Bradley 1746-QS Allen Bradley SLC500 Synchronized Axes Module
Allen Bradley 1746A13 SLC500 13 Slot I/O Rack
Allen Bradley 1746HSCE High Speed Counter Module. 1 Ch.
Allen Bradley 1746OB16 24vdc Transistor O/P Module. 16 Way.
Allen Bradley 1746P4 SLC500 110/240vac PSU 10A 24vdc
Allen Bradley 1747-AIC SLC500 DH-485 Link Coupler
Allen Bradley 1747-ASB Allen Bradley SLC500 Remote I/O Adaptor
Allen Bradley 1747-CP3 Communications Cable
Allen Bradley 1747-DCM SLC500 Direct Communications Module
Allen Bradley 1747-L20A SLC 500 20 I/O Brick
Allen Bradley 1747-L30C Allen Bradley SLC500 Brick
Allen Bradley 1747-L40C Allen Bradley SLC500 PLC Brick
Allen Bradley 1747-L40F Allen Bradley SLC500 Programmable Controller Unit
Allen Bradley 1747-L511 Allen Bradley SLC 500 5/01 Processor
Allen Bradley 1747-L514 Allen Bradley SLC 500 Processor Module
Allen Bradley 1747-L524 SLC 500 Processor Unit
Allen Bradley 1747-L531 SLC500 Processor Module
Allen Bradley 1747-L532 SLC 500 5/03 Processor
Allen Bradley 1747-L541 SLC500 Processor Unit
Allen Bradley 1747-L542 SLC500 5/04 Processor Module
Allen Bradley 1747-L543 SLC500 Processor Module