自营81001-196-02-R控制板卡的特性

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因为这类设备的执行机构相对位移较大；或者传动结构复杂，机械、电气、液压等各环节稍有不到位就会产生误差或故障。在长期的运行状态下，如果缺乏运行维护，易造成阀体部件的卡，堵，漏等现象。因此在系统运行时要加强对此类设备的巡检，发现问题及时处理。我厂对此类设备建立了严格的点检制度，定期检查阀门是否变形，执行机构是否灵活可用，控制器是否有效等，很好地保证了整个控制系统的有效性。

3、第三类故障点可能发生在开关、极限位置、安全保护和现场操作上的一些元件或设备上

其原因使用NI SCXI 1346在多机箱系统中，需要以下物品：一台计算机、一把小平头螺丝刀、68 针屏蔽电缆、一个 68 针 E 系列 DAQ 设备、一个 SCXI 1001 或 SCXI 1000 机箱（版本 K 或更高版本）、一个每个机箱的或更多 SCXI 模块（SCXI-1127、SCXI-1190 和 SCXI-1191 除外）、SCXI 1349 屏蔽电缆组件和 SCXI-1346 安装指南。用户应牢记在多机箱 SCXI 系统中使用的总电缆长度不要超过 10 m。这将有助于确保可靠的操作。

SCXI 1346使用与软件包/应用程序开发环境 (ADE) 兼容的 NI-DAQmx 驱动软件运行，例如 LabVIEW、LabWindows、LabVIEW SignalExpress、Measurement Studiio、Visual C++ 或 Visual Basic。可以使用 National Instruments Measurement & Automation Explorer (MAX) 工具配置设备硬件。

如某生产线PLC控制系统的日常维护中，电气备件消耗量大的为各类继电器或空气开关。除了产品本身质量原因之外，主要是由于现场环境比较恶劣。例如，暴露于生产环境中的接触器触点易打火或氧化，逐渐发热变形，直至不能使用。该生产线所有现场的控制箱都是选用密闭性较好的盘柜，其内部元器件较其他采用敞开式盘柜内元器件的使用寿命明显要长。所以避免此类故障应尽量选用高性能继电器，并改善元器件使用环境，就可以减少更换的频率，降低对系统运行的影响。

2、二类故障多发点在阀门或闸板这一类的设备上

因为这类设备的执行机构相对位移较大；或者传动结构复杂，机械、电气、液压等各环节稍有不到位就会产生误差或故障。在长期的运行状态下，如果缺乏运行维护，易造成阀体部件的卡，堵，漏等现象。因此在系统运行时要加强对此类设备的巡检，发现问题及时处理。我厂对此类设备建立了严格的点检制度，定期检查阀门是否变形，执行机构是否灵活可用，控制器是否有效等，很好地保证了整个控制系统的有效性。

3、三类故障点可能发生在开关、极限位置、安全保护和现场操作上的一些元件或设备上

其原因可能是因为长期磨损，也可能是长期不用而锈蚀老化。如该生产线窑尾料球储库上的布料行走车来回移动频繁，而且现场粉尘较大，所以接近开关触点出现变形、氧化、粉尘堵塞等从而导致触点接触不好或机构动作不灵敏。对于这类设备故障的处理主要体现在定期维护，使设备时刻处于完好状态。对于限位开关尤其是重型设备上的限位开关除了定期检修外，还要在设计的过程中加入多重的保护措施。Using NI SCXI 1346 in a multi-chassle system requires the following items: a computer, a small flat-head screwdriver, a 68-pin shielded cable, a 68-pin E-series DAQ device, a SCXI 1001 or SCXI 1000 chassis (version K or later), one or more SCXI modules per chassis (excluding SCXI-1127, SCXI-1190 and SCXI-1191), SCXI 1349 shielded cable assembly, and SCXI-1346 installation guide. Users should keep in mind that the total cable length used in the multi-case SCXI system should not exceed 10 m. This will help ensure reliable operation.



SCXI 1346 runs with NI-DAQmx driver software compatible with the package/application development environment (ADE), such as LabVIEW, LabWindows, LabVIEW SignalExpress, Measurement Studio, Visual C++, or Visual Basic. You can use the National Instruments Measurement&Automation Explorer (MAX) tool to configure the device hardware.



In the whole PLC control system, the site is the most prone to failure, and the site is the most prone to failure in the following aspects.



1. The first type of fault point is also the most fault point) in relays and contactors



For example, in the daily maintenance of the PLC control system of a production line, the largest consumption of electrical spare parts is various relays or air switches. In addition to the quality of the product itself, the main reason is that the site environment is relatively bad. For example, the contacts of contactors exposed to the production environment are easy to ignite or oxidize, and gradually heat and deform until they cannot be used. All on-site control boxes of the production line are made of panels and cabinets with good tightness, and the service life of its internal components is significantly longer than that of other open panels and cabinets. Therefore, to avoid such failures, high-performance relays should be selected as far as possible, and the use environment of components should be improved to reduce the frequency of replacement and reduce the impact on system operation.



2. The second type of fault frequently occurs on equipment such as valves or rams



Because the relative displacement of the actuator of such equipment is relatively large; Or the transmission structure is complex, and if the mechanical, electrical, hydraulic and other links are not in place, errors or faults will occur. Under long-term operation, if there is no operation and maintenance, it is easy to cause jamming, blocking and leakage of valve body parts. Therefore, when the system is running, it is necessary to strengthen the patrol inspection of such equipment and timely handle the problems found. Our factory has established a strict point inspection system for such equipment, regularly checking whether the valve is deformed, whether the actuator is flexible and available, and whether the controller is effective, which well ensures the effectiveness of the entire control system.



3. The third type of fault point may occur on some elements or equipment in switch, limit position, safety protection and field operation



The reason may be due to long-term wear, or corrosion and aging due to long-term use. For example, the distribution cart on the kiln tail ball storage of the production line moves frequently, and the dust on the site is large, so the contact of the proximity switch is deformed, oxidized, and blocked by dust, resulting in poor contact of the contact or insensitive action of the mechanism. The treatment of this kind of equipment failure is mainly reflected in regular maintenance to keep the equipment in good condition at all times. For limit switches, especially those on heavy equipment, in addition to regular maintenance, multiple protection measures should be added in the design process.