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PR6423/01R-111 CON031 PLC-模拟量输入模块

  • 产品报价:¥ 88 元/台
  • 供 货 量:100台
  • 更新时间:2023年11月29日
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EMERSONPR6423/01R-111CON031EMERSONPR6423/01R-111CON031EMERSONPR6423/01R-111CON031PLC自身故障判断一般来说,PLC是极其可靠的设备,出故障率很低。PLC的CPU等硬件损坏或软件运行出错的概率几乎为零;PLC输入点如不是强电入侵所致,几乎也不会损坏;PLC输出继电器的常开点,若不是外围负载短路或设计不合理,负载电流超出额定范围,触点的寿命也很长。因此,我们查找电气故障点,重点要放在PLC的外围电气元件上,不要总是怀疑PLC硬件或程序有问题,这对快速维修好故障设备、快速恢复生产是十分重要的,因此笔者所谈的PLC控制回路的电气故障检修,重点不在PLC本身,而是PLC所控制回路中的外围电气元件。2、输入输出(I/O)模块的选取输出模块分为晶体管、双向可控硅、接点型。晶体管型的开关速度最快(一般0.2ms),但负载能力最小,约0.2~0.3A、24VDC,适用于快速开关、信号联系的设备,一般与变频、直流装置等信号连接,应注意晶体管漏电流对负载的影响。可控硅型优点是无触点、具有交流负载特性,负载能力不大。继电器输出具有交直流负载特点,负载能力大。常规控制中一般首先选用继电器触点型输出,缺点是开关速度慢,一般在10ms左右,不适于高频开关应用。3、接地问题PLC系统接地要求比较严格,最好有独立的专用接地系统,还要注意与PLC有关的其他设备也要可靠接地。多个电路接地点连接在一起时,会产生意想不到的电流,导致逻辑错误或损坏电路。而产生不同的接地电势的原因,通常是由于接地点在物理区域上被分隔的太远,当相距很远的设备被通信电缆或传感器连接在一起的时候,电缆线和地之间的电流就会流经整个电路,即使在很短的距离内,大型设备的负载电流也可以在其与地电势之间产生变化,或者通过电磁作用直接产生不可预知的电流。在不正确的接地点的电源之间,电路中有可能产生毁灭性的电流,以至于破坏设备。PLC系统一般选用一点接地方式。为了提高抗共模干扰能力,对于模拟信号可以采用屏蔽浮地技术,即信号电缆的屏蔽层一点接地,信号回路浮空,与大地绝缘电阻应不小于50MΩ。4、消除线间电容避免误动作电缆的各导线间都存在电容,合格的电缆能把此容值限制在一定范围之内。即使是合格的电缆,当电缆长度超过一定长度时,各线间的电容容值也会超过所要求的值,当把此电缆用于PLC输入时,线间电容就有可能引起PLC的误动作,会出现许多无法理解的现象。这些现象主要表现为:明接线正确,但PLC却没有输入;PLC应该有的输入没有,而不应该有的却有,即PLC输入互相干扰。为解决这一问题,应当做到:1.使用电缆芯绞合在一起的电缆;2.尽量缩短使用电缆的长度;3.把互相干扰的输入分开使用电缆;4.使用屏蔽电缆。5.抗干扰处理工业现场的环境比较恶劣,存在着许多高低频干扰。这些干扰一般是通过与现场设备相连的电缆引入PLC的。除了接地措施外,在电缆的设计选择和敷设施工中,应注意采取一些抗干扰措施:1.模拟量信号属于小信号,极易受到外界干扰的影响,应选用双层屏蔽电缆;高速脉冲信号(如脉冲传感器、计数码盘等)应选用屏蔽电缆,既防止外来的干扰,也防止高速脉冲信号对低电平信号的干扰;2.PLC之间的通信电缆频率较高,一般应选用厂家提供的电缆,在要求不高的情况下,可以选用带屏蔽的双绞线电缆;3.模拟信号线、直流信号线不能与交流信号线在同一线槽内走线;4.控制柜内引入引出的屏蔽电缆必须接地,应不经过接线端子直接与设备相连;5.交流信号、直流信号和模拟信号不能共用一根电缆,动力电缆应与信号电缆分开敷设;6.在现场维护时,解决干扰的方法有:对受干扰的线路采用屏蔽线缆,重新敷设;在程序中加入抗干扰滤波代码。6、标记输入输出,方便检修PLC控制着一个复杂系统,所能看到的是上下两排错开的输入输出继电器接线端子、对应的指示灯及PLC编号,就像一块有数十只脚的集成电路。任何一个人如果不看原理图来检修故障设备,会束手无策,查找故障的速度会特别慢。鉴于这种情况,我们根据电气原理图绘制一张表格,贴在设备的控制台或控制柜上,标明每个PLC输入输出端子编号与之相对应的电器符号,中文名称,即类似集成电路各管脚的功能说明。有了这张输入输出表格,对于了解操作过程或熟悉本设备梯形图的电工就可以展开检修了。但对于那些对操作过程不熟悉,不会看梯形图的电工来说,就需要再绘制一张表格:PLC输入输出逻辑功能表。该表实际说明了大部分操作过程中输入回路(触发元件、关联元件)和输出回路(执行元件)的逻辑对应关系。实践证明如果你能熟练利用输入输出对应表及输入输出逻辑功能表,检修电气故障,不带图纸,也能轻松自如。7、通过程序逻辑推断故障现在工业上经常使用的PLC种类繁多,对于低端的PLC而言,梯形图指令大同小异,对于中高端机,如S7-300,许多程序是用语言表编的。实用的梯形图必须有中文符号注解,否则阅读很困难,看梯形图前如能大概了解设备工艺或操作过程,看起来比较容易。若进行电气故障分析,一般是应用反查法或称反推法,即根据输入输出对应表,从故障点找到对应PLC的输出继电器,开始反查满足其动作的逻辑关系。经验表明,查到一处问题,故障基本可以排除,因为设备同时发生两起及两起以上的故障点是不多的。SiemensSimaticS5-110S/B6ES5902-3SA12LoherDynavert2T2A-03400-0041077403Siemens6ES5256-3AA11PILZPSS-IBS-SInterbus-S-Slave301150BFUF006176C0064FerrocontrolSEMHD142C6-88S/RSiemensSimaticS56ES5312-3AB31IndramatMAC090B-0-ND-3-C/110-B-0/S001INDRAMATNFM1.2-08DanfossVTL2803PD2B20STR0DBF00A00C0195N0001LenzeMDSKANN080-22MitsubishiMelsecA1S61P+A1SCPU+A1SY80+A1SX81+AIS35BSiemensSimaticS56ES5312-5AA21SICKCLV280-2020P/N1011SiemensSimaticS56ES5288-4UA11Siemens6ES5288-4UA11KukaKS5CC-005/R/95LFlutecF?rderpumpeHydraulikPumpeFZP-1/1.1/P/71/10/RV6AMT-HS-DW20SchraubtechnikHSDW20MitsubishiMELSECA1S63PMitsubishiMELSECA1S61PBergerLahrSIGpositecWDO5-008.15101KEBCombivert15.56.20A-3389LenzeEVF8202-G-V011IBSCT24IOGTLKZNA71B4/WUH10DDFestoVentilinselTN18980VIFB-03-BSICKC20S-060103A121019404LP-M-D1YY-M-1000-S1G4MME-MTS-600-TLF-AIFMF3UM01CWFestoCPV14-GE-DI01-8SEWRF27DRE90M4/THSiemensVS1006AV9070-1AC00Siemens6DM1001-4WA05-1AEGMODICONCEGELECAASADU085.3ADU085.3029.209110SiemensC71458-A6406-A11E-T-ASLW112BoschRexrothHandschrauberErgoSpin0608710031JohnS.BarnesGPA3-25-A1-4-E-30-RKUHSEKSY11Sieb&Meyer7xSLOTVarianSD-200VakuumpumpeType350CVDE530PfeifferBalzersDUO004BEckardt6986820KBIB633ATEKKegelradgetriebeV160PrommessServomotorDSM4-11.3-20R.96-1AABaumerelectricBDC06.24K4096/K508SiemensSIMODRIVE6SN1123-1AA00-0BA1SiemensSIMATICS5-110S/B6ES5902-3SA12Siemens6ES5757-0AA11ABBCI810V1AEGA102L-TBP2232.1110.017-00SEWKH37DRN80M4/BE1HR/IS/TFMotorolaMVME1600-001JohnsonControlsVA7810-GGA-11SEWKA37DRS71M4BE05/MM05KEBCombivert11.56.211Sieb&MeyersinudynTypeM226.47.10Siemens6ES7450-1AP00-0AE0Sick30-FGSFGSS1050-211012610Sender+FGSE1050-211012611LenzeGetriebePFS20C02BSTNQH3MDX61B0008-5A3-4-00SiemensSIMOREG6RA2116-6DD20-0AABBBaileyinfi90IEPAF02ABBBaileyNTU-7UORexroth4WE10E50/EG24N9K4/MR901278761NeugartWPLS90WPLS902087999-1SickMSLMSLE03-14061ASICK30-FGSFGSE1800-211012621SiemensSimaticS76ES7153-2BA01-0XB0Masoneilan28-0000WOLTEXMItronWaterMeterDN100D11XI019740WE100Endress+HauserDeltapilotMFMB52-19C1/0ABB266MSTLTKA6BHINDRAMATAPRB02-03-FWWürgesHV12/2HV122HerionHDSV2DH40200A15992077KollmorgenS700S70302-NANANA-NAKollmorgenS700S70302-NANANAFoxboro83F-A3QS5SSTNE-N3ME6/63/45/235F11/X11CPU6514/a2CPU6514/aKUKA339-89339-89.267KUKAINZ55/4390-00149-0KUKAINZ55/5390-00207-0KUKAINZ55/6390-00224-0KUKAVIAVT82C586BSiemensC79040-A92-C223-3-87DalsaHS-41-02K30-00ERexroth4WE10D33/OFCG24N9K4VOLTALufterhitzerERR72910/01DEMAGKRBG2BALDORASRSYN2-3BALDORASRDBTS10DBTS10-200-7BALDORBPS10-200-40-40-R-707BALDORASRBPS10BPS10-200-40-40-R-707Siemens6SN1122-0BA12-0AA0LenzeServomotorSDSGABR047-22FestoDGSL-25-30-Y3AFestoDGC-12-850-G-P-ABBCGCB0532R2AtlasCopco4230190383P56X0312HRPM3450/230/460BaldorSuperE3Ph.Drehstrommot.05F033W48961MarpossE4NHBT63440713006840040025/BHSCRegelungstechnikMC-3000KeyenceSR-751BaldorReliance3PhasenDrehstrommotorM3665T1746Baldor3P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