描述
软件故障一般较难发现,但软件引起的问题如果不能及时发现,不仅会影响系统的工作,甚至会导致系统的瘫痪。
某350MW机组,正常运行时9个控制器依次发NTP报警,在此后的七个半小时内,相继因控制器离线造成三台磨煤机跳闸和一台引风机动叶关闭。经分析,是系统时钟偏差积累到一定程度后导致主、备时钟不同步,引起系统时钟紊乱,最终导致控制器离线,从而导致整个控制系统瘫痪。找制造商将软件升级后正常。
某200MW机组DCS采用UNIX操作系统,每台操作员站运行一段时间后都会发生因资源耗尽而死机,必须定期检查系统资源,定期重启操作员站主机,影响机组正常运行。检查发现内存资源计数器不能自行复位,由DCS供应商为升级应用程序后正常。
任何软件即使经过测试也非常有可能存在各种BUG,据统计,初次编出的软件平均每100-4000条指令就会出现一个错误,这些错误需要在调试、试运,甚至到运行时才能陆续被发现和改正。在平时的运行维护中,要仔细检查记录并分析DCS相关的各种异常和缺陷,发现与软件相关的问题后立即与供应商取得联系,将情况反馈并加以解决。
主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro(福克斯波罗):I/A Series系统,FBM(现场输入/输出模块)
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
⑨Siemens(西门子):Siemens MOORE,Siemens Simatic C1,Siemens数控系统等。
⑩Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
*NEW*Allen Bradley AB 1745-LP153/C SLC150 Controller
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1745-LP153/C Allen Bradley SLC 150 1745LP153 N835
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Allen Bradley SLC100 Expansion M#1745-E105~NIB SUR.~
Allen Bradley 1745-E101 Expansion Unit 1745E101 USED
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Allen Bradley 1745-P101 Programmable Controller USED
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Allen Bradley 1745-PCC SER A
Allen Bradley SLC 150,1745-E151/A,Expansion*TESTED*
New in Box 1745-E153/A Allen Bradley 1745E153 N813
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Allen Bradley 1745-E153 Series-A SLC150 Expansion Unit
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Allen Bradley SLC 100 Expansion Unit 1745-E105,#8868
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ALLEN-BRADLEY 1745-LP153 SLC 150 Ser C Processor Unit
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Allen-Bradley 1745-LP151 Ser C SLC 150
ALLEN-BRADLEY 1745-M1 MEMORY MODULE
ALLEN BRADLEY 1745-E105 SLC 100 EXPANSION UNIT SERIES A
Allen Bradley 1745-LP101
Allen Bradley 1745-E151
ALLEN BRADLEY 1745-PT1 PROGRAMMER*NICE*
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Allen Bradley PLC Expansion Unit SLC100 I/O 1745E101
Allen Bradley I/O Module Fixed Hardware Style 1745LP101
Allen Bradley Processor Unit SLC150 1745-LP151 w/M1*
Allen Bradley 1745-PT1/A Programmer w/1745-C1 Cable
Allen bradley SLC 150 Processor Unit 1745-LP 154(4436)
ALLEN BRADLEY SLC 100 PROCESSOR UNIT 1745-LP101 SER D
Allen Bradley 1745-E151 Expansion Module
Allen Bradley Programming Terminal 1745-PT1(3648)
Allen-Bradley SLC Programmer 1745-PT1
ALLEN BRADLEY 1745-E154 SLC 150 PROCESSOR UNIT
ALLEN BRADLEY 1745-E103 USPP 1745E103
ALLEN BRADLEY 1745-LP101 USPP 1745LP101
Allen Bradley SLC 100 Processor 1745-LP101,#6832
New in Box 1745-E153/A Allen Bradley SLC 150 1745E153
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Allen-Bradley SLC100 1745-PT1 Programmer NIB
NICE ALLEN BRADLEY SLC 150 EXPANSION UNIT#1745-E153
NICE ALLEN BRADLEY SLC 150 EXPANSION UNIT#1745-E151
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ALLEN-BRADLEY SLC 100 1745LP103 PROGRAMMABLE CONTROLLER
Allen Bradley SLC150 Expansion Unit CAT 1745-E153 A
ALLEN BRADLEY 1745-M1 NSPP 1745M1
Allen Bradley#1745-LP101 I/O Module Fixed(U)ABS/9
ALLEN BRADLEY 1745-E101 USPP 1745E101
ALLEN BRADLEY SLC150 PROGRAMMABLE CONTROLLER 1745-LP154
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ALLEN BRADLEY 1745-LP101 SLC 100 PLC GREAT CONDITION!
Allen Bradley 1745-E153|Expansion Unit*NIB*
Allen Bradley 1745-LP101 SLC 100 Processor Unit SeriesD
ALLEN BRADLEY 1745-E101 SLC 100PROGRAMMABLE CONTROLLER
Allen Bradley 1745-E101
ALLEN BRADLEY 1745 LP101 PROCESSOR UNIT SLC 100
Allen Bradley Analog Input Exp.Unit 1745-E106/A NIB!
Allen Bradley Cat#1745-M1 Memory Module*NIB*
Allen Bradley 1745-LP101 SER D
Allen Bradley SLC100 Programmable Controller 1745-LP101
ALLEN BRADLEY PROCESSOR UNIT 1745-LP1S1**NEW**
Allen Bradley SLC100 1745 LP101 Programmable Controller
Allen Bradley 1745-PCC Interface Converter
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Allen Bradley 1745-E105 Relay Expansion Unit(NEW)
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Allen Bradley 1745-E151 SLC 150 Expansion Unit Ser.A
ALLEN BRADLEY 1745-R2 NSFP 1745R2