SIWAREX CS称重模块

基于CS5530的动态称重系统设计作者：杨丙根来源：《数字技术与应用》2009年第11期[摘要]本文介绍了一种基于CS5530的动态称重控制系统,重点介绍了CS5530的性能、动态称重对数据采集的要求、系统的设计方案,给出了硬件原理框图及软件实现流程图,系统经过了实践证明是可行的,有非常好的性价比。

[关键词]CS5530 线性度数据采集动态称重[中图分类号]TP391[文献标识码]A[文章编号]1007-9416(2009)11-0007-021 引言动态称重系统是应用于动态电子秤的控制系统,对工作物料进行快速称重计量和精确实时控制。

广泛应用于粮食、化工、冶金、建材等行业生产现场的称重计量和控制。

动态称重控制系统的性能直接影响到动态电子秤的精度、速度,对保证企业的产品质量和提高生产效率有关键的影响,而系统的工作现场较为恶劣,且由于物料的不同、生产要求也有很大的不同,其精度要求可能是千克,也有可能是百分之一克,同时为提高生产效率又要求系统在保证精度的前提下,尽可能地提高称重速度,这对控制系统的提出了很高的要求,因此设计一个符合要求的、有较高性价比的数据采集系统显得非常关键。

2 CS5530 数据采集芯片简介CS5530是Cirrus Logic公司推出的低成本、24位△-∑模数转换器,它具有较强的价格优势,拥有可与CS553X系列其他产品相媲美的低噪声性能和灵活的输出字符率。

凭借其低噪声仪器放大器、24位分辨率等先进性能,CS5530成为称重系统、低成本温度控制器、数字面板式仪表和工艺控制模块等科学测量应用的理想选择。

CS5530是高集成度的△-∑模数转换器,拥有一个差分输入通道和固定增益可达64 x的高性能的斩波稳零仪表放大器,内部有一个4阶△-∑调制器,其后跟着一个数字滤波器,具有较好的噪声抑制能力,线性误差达%FS,可测量单/双极小信号,可分辨最小输入信号的电压为12nV。

在主时钟频率在4.9152MHz振荡器的情况下,CS5530可提供最高可达3.84KHz SPS的输出字速率,并根据需要进行调节。

如何通过STEP7软件对SIWAREX FTA进行设置. 模块简介SIWAREX FTA 是SIMATIC S7-300 的一个功能模块，可以直接集成到SIMATIC S7-300 或ET 200M 底板总线上，主要任务是高精度测量多达三个测量范围的实际重量，并精确控制称重过程。

具有1600 万间隔的高分辨率 ...1. 模块简介SIWAREX FTA 是SIMATIC S7-300 的一个功能模块，可以直接集成到SIMATIC S7-300 或ET 200M 底板总线上，主要任务是高精度测量多达三个测量范围的实际重量，并精确控制称重过程。

具有1600 万间隔的高分辨率，贸易认证的高精度为3 x 6000 dSIWAREX FTA 称重模块通过参数化可以实现下列称重功能：• 符合OIML R76 非自动衡器• 符合OIML R61 自动装料衡器• 符合OIML R51 自动分检衡器• 符合OIML R107 非连续累计自动衡器 ( 累计料斗称)2. FTA 模块接线在该实验中通过仿真器模拟称重传感器。

如果称重传感器为四线制（如上图所示），必须将称重模块上的EXC+与SEN+短接，EXC-与SEN-短接，否则SIWAREX FTA模块报故障。

如果SIWAREX FTA模块与传感器之间通过接线盒进行连接，上述短接需要在接线盒内进行。

3. FTA软件包安装安装“用于SIMATIC S7 的SIWAREX FTA 配置程序包”订货号：7MH4900-0AK01 找到“SET_UP_FOR_SIMATIC_S7”文件夹，运行可执行文件Setup4. STEP 7编程（1）打开STEP7，创建一个新的项目（2）在该例子中硬件配置如下：注意： SIWAREX FTA属于功能模块，可以在CPU300或ET200M的FM目录下找到（3）将例子程序中的FB41、DB11和DB12、UDT1和UDT12拷贝到当前项目中，如下图所示：（4）双击，打开OB1从目录中找到FB41功能块，并添加到程序中（如下图）。

SIEMENS WEIGHING TECHNOLOGY Totally integrated weighingComponents and solutions for weighing, dosing and batching/weighingTotally integrated weighingSo, what do youneed measured?Weighing and dosing processes are of great significance inmany areas of industrial production.Whether for filling food and beverage containers or preparingrecipes for chemicals and pharmaceutical products: With oursolutions, you can count on absolute reliability and highestprecision.2So, what do you need measured? 21SIWAREX DB – your connectionto the digital world 8 2SIWAREX weighing modules –available for all requirements 6 Our SIWAREX weighing electronics at a glance 7 SIWAREX DB – your connectionto the digital world 8 Load cells and accessories – an overview 9 Non-automatic weighing 10 Check weighing 11Dosing, filling and batching applications 12 Loss-in-weight applications 13 Belt scales 14 Product overview 15 Solids flowmeters 16 Weighfeeder 17 Integrators – stand-alone 18 Integrators – SIMATIC-integrated 19 Process protection 20 3Sales and support 21 Siemens weighing trainings –on-site and online223Totally integrated weighingSeamless integrated weighing technology in the SIMATIC environmentSIMATIC PLCThe free standard example projects and function blocks offer full access to all parameter and data of the weighing electronics and allow a fast integration of the scales into existing automation programs and visualizations. In case of alarms, integrated hardware interrupts provide full transparency from the sensor to the controller. Following SIMATIC standards, a long term availability of all electronics and components is guaranteed.Based on a continuous handling concept across all different weighing electronics, a quick and easy integration of new types of scales is ensured.Userfriendly HMIThe HMI panel offers completely editable user interfaces. All relevant workflow processes, such as operating, monitoring and maintenance can be done directly from the central HMI, means there is no struggle with any additional black box on the machine.Besides that, the HMI offers a customer-friendly error handling: due to the detailed error message system, the errors will be shown in a clear text which leaves no ques t ions un-answered. You need more than one language to be displayed? No problem, foreign languages can easily be added via simple EXCEL ex- and import. But the HMIdoes not only offer comfort regarding the handling during daily business.The SIMATIC Comfort HMI, for instance can also be used as legal-for-trade main display.Continuous hardware conceptThe hardware concept considers the SIMATIC standards, which makes the wiring easy and guarantees a clear structure in the cabinet.By using SIMATIC standard controllers and I/O cards, you will achieve highest flexibility and scalability in your weighing environment. Besides that you can decide whether to install your components centrally or as d istributed system.1234Totally integrated weighingTotally integrated weighing2315SIWAREX weighing modules – available for all requirementsWhether central or distributed: our electronic weighing systems set standards. We offer i ntegrated solutions for seamless integration into the SIMATIC automation system underthe name SIWAREX. The weighing system can be easily adapted to meet your individual requirements with the SIMATIC standard components. Moreover, standardized interfaces, i ntegrated functions, and uniform tools allow for cost-effective configuration.Whatever your choice, you can count on a high degree of precision with SIWAREX and benefit from certifications according to OIML as well as a finely graded range of functions.Whether you need to produce accurate mixtures, ensure precise filling and loading, or perform tasks like legal-for-trade bagging, checking and dosing: SIWAREX WP351 is always the right choice. It’s the perfect fit for all auto -matic and non-automatic weighing applications.6Totally integrated weighingOur SIWAREX weighingelectronics at a glanceTotally integrated weighingSIWAREX DB – your connection to the digital worldAnalog limitations are left behind with SIWAREX DB. Instead of doing a parallel connection of the analog load cells and having no information about the single load cell, digitalization of each load cell offers full transpar-ency.SIWAREX DB makes the digitalization of the proven, most common and cost-effective strain gauge t echnology possible. For direct connection to a SIMATIC S7 or PCS7 PLC the SIWAREX WP weighing e lectronics are ideal.Seamless communication between SIWAREX and SIMATIC ensures less time and effort duringcommissioning. During operation the single channel monitoring, allowing wire break, impedance, and the current utilization of each load cell to be detected and corrected in the event of an error.SIWAREX DB supplies diagnostics data that are fully integrated in the SIMATIC environment. Error messages are displayed centrally on the SIMATIC controller and the HMI.Whether it’s the specific monitoring of weighing processes or extended diagnostics – in environments that have already been automated, the benefits of digitalization can be exploited to ever better effect.In the field of weight measurement, seamless integration from the field to the control levels ensures that data is record -ed and evaluated more comprehensively than previously possible. With SIWAREX DB, this level ofconnectivity now also covers the individual analog load cell.8Totally integrated weighingLoad cells and accessories – an overview9Totally integrated weighingNon-automatic weighingWeighing air cargo shipments reliablyCargologic AG is a leader in air cargo handling and has been operating at Zurich Airport for more than 50 years. To weigh individual freight units and complete unit load devices (ULDs), a floor model of a platform scale is used. The solution was a combi -nation comprised of four SIWAREX WL280 RN-S SA load cells and the SIWAREX WP231 weighing module.10Totally integrated weighingDosing, batching and bagging scaleA predefined set-point is completely automatically batchedby the SIWAREX electronic – typically by coarse and fine flow control.Dosing, batching and high-speed bagging (bagging m achines, multi component batching)The optimal choiceSIWAREX WP351 (SIMATIC ET 200SP)SIWAREX WP251 (SIMATIC S7-1200/stand-alone) SIWAREX FTA (SIMATIC S7-300/400/ET 200M) SIWAREX load cells and installation accessoriesExact weighing for fruit and vegetable packagingThe end customer of the plant builder RMA techniek was not able to conduct final check weighing at the end of the packaging process. A custom weighing solution in an integrated control environment had to change all that. The core element of the solution is the SIWAREX S7-1215C controller.Check weighingsolutions for tea, coffee, beverages, foods such as dairy and convenience products. A new machine for filling coffee capsules shall be projected and put in operation.Loss-in-weight applicationsFilling processes in washing powder productionMifa AG is Switzerland’s largest detergent and cooking oil manu-facturer and also produces detergents and householdcleaning products in liquid and powder form. A solution with Siemens weighing products has been found for the company’s outdated washing powder filling system that has done more than just positively affect productivity.Weighing and controlling the rate of materials on a conveyor belt is one of the most common procedures in process automation. Siemens has more than 35 years of experience weighing bulk materials on conveyors. You will find ourMilltronics belt scales from Siemens combine simple drop-in installation and low maintenance (no moving parts) withAccurate measuring for aRussian phosphate mineApatit Mining in Russia is the world’s largest producer of highgrade phosphate ore which is used as a raw material base for theproduction of phosphate-based fertilizers. The company waslooking to modernize and expand production and needed anaccurate and reliable system to weigh the ore to determine themine’s production rates. The picture shows MSI belt scale withMWL calibration system.Product overviewFlowguide sizes to fit any ASME or DIN flangeMeasuring accuracy is not affected by product buildup on the sensing plateDust-tight enclosure to prevent contamination or spillingQuick-release latches formaintenance and samplingSolids flowmetersSolids flowmeters in a fertilizer plantIn a fertilizer plant, crushed dolomite and crushed limestone are mixed in a reactor, whereby the mixing ratio of 1:3 must be maintained. The materials are conveyed from silos via screw conveyors into the solids flowmeters and brought t ogether in a bucket elevator for conveying into the reactor. The exact mixing ratio is ensured by the speed of the screw conveyors, which is controlled by a PLC, on the basis of the respective throughput rates of the solids flowmeters.WeighfeederReliable pleasure thanksto Siemens weighingtechnologyThe cigar manufacturer J. Cortès has two production sites inBelgium and about 3600 employees around the world. At its sitein Handzame, the company was looking for a fail-proof weighingsystem to maintain the necessary balance in termsof flavor. Based in Torhout, the industrial weighing expert Bas-cules Robbe therefore turned to Siemens. Together, they offered acomplete and customized solution.Analog interfacesCommunication such asProfiBus DP, Modbus or EthernetIntegrators – stand-aloneStand-alone integratorsOur integrators display primary speed and load values, as well as derived values of rates as analog mA output, alarm relay, or remote totalizer or through several industrial communications protocols.Belt scale modules for S7-300, S7- and via ET200M to S7-400 or PCS7-1200Analog interfaces like stand-aloneSIMATIC-integrated integratorsBeltscale electronics for seamless integration into the SIMATIC S7-1200 automation system. Flowrate, belt speed, load and status info are easily adapted into PLC system. Parametrization and calibration can be done by PLC, HMI or SIWATOOL software for Notebooks.Integrators – SIMATIC-integratedProcess protectionCustom engineeringSiemens provides custom-engineered products to solve your special application needs. From material compatibility challenges to unique size requirements,Siemens’ custom engineering team can help. Service around the worldPlants must function reliably at all times. Efficient and effective process instrumentation and analytics are an indispensable require-ment to this end. You also need to be certain of fast and competent service from your supplier. Siemens is a global company that reacts locally. Whether you require consulting, quick delivery, or installation of new devices, the Siemens network ofspecialists is available to you around the world, wherever your location.Support around the worldOur online support system offers rapid, com-prehensive assistance regardless of time or location. From product support to service information, Siemens Industry online support is your first choice – around the clock, the fast way 365 days a year.The fast way to your experts:Sales Support: 1-800-365-8766 Technical Support:/pisupportSales andsupport21Totally integrated weighingSiemens weighing trainings – on-site and onlineThe training center in Karlsruhe provides a wide range of industrial scales across nearly 200 square meters. From conveyor belt scales to dosing and bagging, a wide variety of SIWAREX application possibilities can be seen in action. More-over, the training center has a spacious training room andnumerous training models.Individual training conceptThe weighing trainings can either take place in the weighing technology center in Karlsruhe, but also directly on the customer’s site.In the standard training portfolio we offer trainings for– basic trainings with the following content: mechanic and electronic,get to know the basic terms and applications regarding load cells, mounting units and SIWAREX electronics– static applications, such as platform or hopper scales – available in the levels basic, advance, expert– mass dynamics applications regarding belt scales and weighfeeders – available in the levels basic, advance, expertBesides that you are also able to plan your training individually tailored to your needs in agreement with our training experts.22Totally integrated weighingTotally integrated weighingAll trainings can be offeredin different languagesA complete overiew of the training portfolio you find here:English: In addition to our on-site trainings we also offer you various onlinetrainings in English and German.Please contact us, if you are interested: ****************Also have a look at our various online tutorials we offer you in Youtube.Under the following playlist link, you will find a range of filmsconcerning calibration, dosing, filter settings, integration in SIMATICand much more.23Legal Manufacturer Siemens Industry, Inc.100 Technology Drive Alpharetta, GA 30005 United States of America Telephone: +1 (800) 365-8766 /piOrder No. PIBR-B10259-1021Subject to changes and errors. The information provided in this bro-chure contains descriptions or performance characteristics which, in case of actual use, do not always apply as described or which may change as a result of further development of the products. The desired performance characteristics are only binding if expressly agreed in the contract. Availability and technical specifications are subject to change without notice.All product designations may be trademarks or product names of Siemens AG or supplier companies, the use of which by third parties for their own purposes may violate the rights of the owners./weighing。

第4章、S7-200PLC基础知识本章重点1、硬件组成2、系统扩展方法3、内部器件资源4、数据类型5、寻址方式6、编程语言和程序结构因为目前市场上的PLC种类繁多，生产公司不同，PLC的结构和编程语言也会有或多或少的差异，即使是同一家公司的产品，产品系列不同，其编程语言也可能会不同，所以这给大家学习PLC带来了一定的麻烦。

但对此要有一个正确的认识:一、虽然PLC之间存在着一些不相同的地方，但其硬件组成和编程语言的绝大部分是相同或相似的，所以只要学习好一种PLC后，学习或使用其他PLC也就易如反掌了;二、将来基于IEC61131 - 3开放式PLC的编程语言和现在普通PLC的编程语言也比较相似，所以学习好现在的PLC，对以后学习IEC61131 - 3编程语言也有决定性的帮助。

从上面的分析情况看，作为在课堂上讲授PLC，不可能讲解多个产品，这样做也没有必要，所以需要找一种PLC作为讲课的对象。

西门子的SIMATIC S7 - 200系列PLC适用于各行各业、各种场合中的检测、监测及控制的自动化。

S7-200系列的强大功能使其无论在独立运行中，或相连成网络皆能实现复杂控制功能。

由于S7-200系列具有紧凑的设计、良好的扩展性、低廉的价格、丰富的功能模块以及强大的指令系统，使得S7 - 200 PLC可以近乎完美地满足小规模的控制要求。

此外西门子的产品体系符合现在自动化笔域的热点技术：现场总线技术的方向，目前市场上最流行的现场总线就是以西门子为主导而开发的PROFIBUS。

所以本书以西门子的S7 - 200系列PLC为讲授对象讲解PLC的基本原理、硬件系统组成和程序设计。

本章主要介绍S7- 200 PLC的一些基础知识。

4. 1概述S7-200PLC是德国西门子公司生产的一种小型PLC，其许多功能达到大、中型PLC的水平，而价格却和小型PLC的一样，因此，它一经推出，即受到了广泛的关注。

最近几年在小型PLC 市场上S7-200 PLC成为了主流产品。

Version 1.0 - 15.07.2013Answer: The SIWAREX WP231 weighing modules offer a Modbus-TCP/IP and Modbus-RTU (RS485) communication. Please follow this FAQ in order to understand the mechanisms of the Modbus communication.This FAQ is based on the manual of the WP231, which is available online on:/WW/view/en/65621196Basic knowledge in weighing systems and Modbus communication is required to be able to use this FAQ.Before using this document, please check the manual of the WP231 for the right wiring of the 24V DC power supply, the loadcells, I/O’s and communication interfaces.If you run the WP231 without a SIMATIC S7-1200 CPU, please check the position of the “Stand-Alone-Mode” switch of the module:DIP-switch 1 has currently no function. Switch number 2 needs to be in the lower position for the Stand-Alone-Mode without PLC.The factory default is the upper position for PLC-integrated mode!The factory default settings of the Ethernet and Modbus-RTU interface of the WP231 are the following:Ethernet-Port:IP-address: 192.168.0.21 Subnet-Mask: 255.255.255.0 Standard-Gateway: 192.168.0.21RS485 port: Protocol: Modbus RTU Baud rate: 19200 Bits/s Parity: EvenData Bits: 8Stop Bits: 1Modbus Address: 20For the Modbus TCP/IP communication the Port 502 is used.All parameters of the WP231 weighing module are integrated in data records. It‘s possible to read or write a complete data record only! It‘s not possible to read or write one single parameter within a data record.Except the data records 30, 31, 32 and 34 (automatically refreshed) all data records need to be read/written into the Modbus-Registers by using special command codes. Please use the following syntax, in order to generate the right command code for reading a data record from the WP231 into the Modbus-Register or for writing data records from the Modbus-Registers into the WP231:- Read a data record from the WP231 into the Modbus-Registers:command code = 2000 + xx = number of the desired data record- Write a data record from the Modbus-Registers into the WP231:command code = 4000 + xx = number of the desired data recordFor all other commands like “Zero”, “Tare”, “Service Mode On”, “Service Mode off” and so on, please check the command list in the WP231 manual in order to find the right command codes!command 1 (highest priority) command 2 (medium priority) command 3 (lowest priority)data record 3 – Calibration Parameter data record 4 – Auto. Calibration Digits data record 5 – Tare/Zero/Memory data record 6 – Limitsdata record 7 – Process Interfacesdata record 8 – Date and Timedata record 9 – Module Infodata record 10 – Loadcell Parameters data record 12 – Ethernet Parameters data record 13 – RS485 Parameter data record 14 – S7 Interface Settings data record 15 – Preset Taredata record 16 – Weight Simulation data record 17 – Control Analogue Out data record 18 – Control Digital Outs data record 30 – Process Status*data record 31 – Process Status ext.* data record 32 – Data-Command-Errors* data record 34 – ASCII Weight Display*data record 3 – Calibration Parameter data record 4 – Auto. Calibration Digits data record 5 – Tare/Zero/Memorydata record 6 – Limitsdata record 7 – Process Interfacesdata record 8 – Date and Timedata record 9 – Module Infodata record 10 – Loadcell Parameters data record 12 – Ethernet Parameters data record 13 – RS485 Parameterdata record 14 – S7 Interface Settings data record 15 – Preset Taredata record 16 – Weight Simulationdata record 17 – Control Analogue Out data record 18 – Control Digital Outs data record 30 – Process Status*data record 31 – Process Status ext.* data record 32 – Data-Command-Errors* data record 34 – ASCII Weight Display** = data are refreshed automaticallyModbus-Registers(detailed information about the data records can befound in the WP231 manual)SIWAREX WP231 dataExample:You want to change the parameter “Adjustment Weight 1” which is included in the data record 3:1.) As data record 3 is accessible with active “Service Mode” only, you have to activate the “Service Mode”. You can find the right command code for this operation in the command list in the manual. “Service Mode On” Command Code “1”In our example we use command 2, with the medium priority.Command 2 has the following structure (see page 6):“Command_2_Code”“Command_2_Trigger”“Command_2_Finished”“Command_2_FinishedError”In order to switch on the Service Mode” you have to write “1” into the “command code 2” (=Modbus Register 920) and to set the “command trigger 2” “TRUE” (=Modbus Register 921).After that, the Service Mode should be active (DIAG led is flashing).2.) If you don’t know, whether the data of data record 3 in the Modbus Registers are up-to-date, you should read the record 3 from the WP231 into the Modbus-Registers first: As you want to read data record 3, you have to use the command code 2003(see page 3).Therefore you have to write “2003” into the “command code 2” (=Modbus Register 920) and to set the “command trigger 2” “TRUE” (Modbus Register 921=“1”).The data of data record 3 in the Modbus-Registers are up-to-date now!3.) Now you can edit the “Adjustment Weight 1” (=Modbus Register 1024).After that, you have to send the modified data record 3 from Modbus-Registers into the WP231 you have to use the command code 4003 now (see page 3)!Therefore you have to write “4003” into the “command code 2” (=Modbus Register 920) and to set the “command trigger 2” “TRUE” (Modbus Register 921=“1”).The modified data record 3 with your new Adjustment weight 1 is written into the WP231 now!4.) At the end we have to switch off the Service Mode again.“Service Mode Off” Command Code “2” (see command list in the manual)Therefore you have to write “2” into the “Command Code 2” (=Modbus Register 920) and to set the “Command Trigger 2” “TRUE” (Modbus Register 921=“1”).The Service Mode should be off now (DIAG led shouldn’t be flashing anymore)! Modbus-Command-Code StructuresCommand_1_Code USHORT 910 2Command_1_Trigger USHORT 911 2Command_1_Finished* USHORT 912 2Command_1_FinishedError* USHORT 913 2Command_2_Code USHORT 920 2Command_2_Trigger USHORT 921 2Command_2_Finished* USHORT 922 2Command_2_FinishedError* USHORT 923 2Command_3_Code USHORT 930 2Command_3_Trigger USHORT 931 2Command_3_Finished* USHORT 932 2Command_3_FinishedError* USHORT 933 2* = read only。

电子称重模块——精准度和可扩展性兼备的理想选择随着科技不断发展，电子称重模块越来越普及和应用。

这种先进的技术已经取代了传统的机械秤，成为目前使用广泛的称重方式。

由于其高精度、高效率等特点，已被广泛应用于工业自动化、物流运输、医疗设备等领域。

一、工作原理称重模块内部含有若干个应变片（straingauge），当外部受力作用后，应变片会发生微小的形变，并对讯号放大器产生微弱的电信号。

模块通过将这些信号转化为数字信号，送入处理器，实现对称重物品重量的测量。

同时，模块可以自动进行零点校准、温度补偿等操作，确保测量结果的准确性和稳定性。

二、特点1、高精度：称重模块的精度一般可以达到0.05%，这比传统的机械秤要高得多。

在一些对称重要求较高的领域，如医疗设备、精密加工等行业内，电子称重模块已经成为重要工具。

2、高效率：称重模块可以实现自动化称重，当物品放上去时，立即能呈现数字结果。

这种高效率大大提高了生产效率，并减少了人工错误的发生。

3、可扩展性：称重模块可以根据需要进行扩展，可以与其他设备通讯，如计算机、PLC、HMI等，形成完整的自动化测量系统。

4、稳定性：称重模块内部含有应变片，可以感知外界的微小振动和干扰，自动进行补偿，保证数据的稳定性和准确性。

三、电子称重模块在不同领域的应用1、工业自动化：称重模块广泛应用于工业生产中，通过连接计算机和PLC等设备，实现流水线称重、自动分拣等功能，提高工业生产效率和质量。

2、物流运输：在物流运输领域，称重模块可以应用于货物的称重检测、车辆载重检测等方面，通过控制称重点的数量和位置，提高称重效率和准确性。

3、医疗设备：称重模块广泛应用于医疗设备中，如医用秤、手推车秤等。

由于其高精度和稳定性，可以对患者的体重、血压等进行准确测量。

4、家用电子秤：家用电子秤是当前市场上普及度高的称重模块之一，广泛应用于家庭生活中，可用于测量人体重量、食材重量等。

总之，电子称重模块具有高精度、高效率、可扩展性和稳定性等特点，在多个领域内都有广泛的应用。

2Weighing ElectronicsSIWAREX weighing electronics for SIMATIC Dosing/filling/bagging and checking scales■Overview The SIWAREX WP351 is a compact, precise weighing module in the SIMATIC ET 200SP format.With a width of just 20 mm it is one of the slimmest weighing modules on the market, yet its firmware includes the functional-ities of an automatic totalizing weighing instrument, check weigher, bagging and filling scale.All operating modes are part of the firmware and certified ac-cording to OIML R-51, R-61, R-76 and R-107. This means the WP351 can be used in both scales requiring official calibration and those that do not, where demands are high regarding speed and accuracy.■Benefits•Low space requirements with only 20mm module width •Seamless integration into SIMATIC ET 200SP •1000Hz sampling rate und processing time•Installation of legal-for-trade multi-interval/multi-range scales with up to 3×6000d•Operation with SIMATIC S7-300, S7-400, S7-1200 and S7-1500 controllers•Operation in Ethernet IP or Modbus TCP-based systems using ET 200SP multi-field bus IM•Three digital inputs and outputs each ex works•High degree of scalability in connection with all available SIMATIC standard components•Open SIWAREX concept – all settings and parameters acces-sible, no encapsulated black box in the field•Unrestricted access to all scale parameters and functions from the SIMATIC S7 Controller / HMI•Internal, legal-for-trade protocol memory for up to 1000000 entries•Commissioning and maintenance from HMI or module-internal web server•Legal-for-trade main display integrated in the SIMATIC HMI■ApplicationSIWAREX WP351 offers a compact and extremely versatile solu-tion for automatic and non-automatic scale applications with high requirements for accuracy and performance.Typical areas of application include:•Silo, hopper and platform scales, requiring official calibration/not requiring official calibration•Totalizing automatic weighing instruments, requiring official calibration/not requiring official calibration•Filling scales, requiring official calibration/not requiring official calibration•Static check weighers, requiring official calibration/not requiring official calibration•Automatic dynamic check weighers, not requiring official calibration•Recipe-controlled batch/mixing scales■DesignThe SIWAREX WP351 is a technology module of the SIMATIC ET 200SP distributed I/O system.Installation is on a type U0 BaseUnit. The load cells, serialRS 485 interface and digital inputs/outputs are wired directly on the BaseUnit with user-friendly push-in terminals. This makes is quick and easy to replace modules without any wiring effort. The web server is addressed via an Ethernet interface in the module. Should more interfaces and I/O be required, they can be added with the ET 200SP system components.■FunctionThe weighing module controls automatic proportioning, check-ing and loading processes completely autonomously. The intel-ligence required is contained in the module firmware, thus rep-resenting a standard. Dosing signals can be controlled directly via the three digital outputs – typically coarse flow/fine flow and emptying. Internal control algorithms and signal filters continu-ally optimize and adjust the weighing process.The controller only transfers the desired setpoint, as well as other material-specific parameters, to the module via the WP351 func-tion block. A start command initiates the dosing process, which is executed by the weighing module independently of the cycle time of the main controller with maximum accuracy. Finally the WP351 carries out a tolerance check and signals the result to the controller. In addition, the result is included in the statistics cal-culated in the background, which can be called up at any time from the controller. Depending on the operating mode, a log is generated in the internal protocol memory, either automatically or initiated by the user. If the scales are calibrated, the log con-forms to the requirements of the Weights and Measures Act.The open and standardized SIWAREX concept means that theplant operator can service the scales themselves if necessary.2Weighing ElectronicsSIWAREX weighing electronics for SIMATICDosing/filling/bagging and checking scales■Technical specifications*At a height of more than 2000 meters above sea level, a derating of theambient temperature of -1°C / 100 m has to be adhered to. The maximumpermissible height is 5000 meters above sea level. At over 0.6A totalcurrent of the digital outputs DQ, a derating of the ambient temperature of-1°C per 100mA has to be adhered to. The max. permissible total currentis 1.5A.SIWAREX WP351Firmware version V1.0•FW update possible YesUsable BaseUnits BU type U0ReliabilityMean time between failures (MTBF)62 years @ TA=40°CProduct functionI&M data Yes, I&M0 to I&M3Engineering with•STEP 7 TIA Portal can be configured/integratedConfigurable as of V15 usingHSP0281•PROFIBUS as of GSD version/GSDrevisionGSD V04.02.41•PROFINET as of GSD version/GSDrevisionGSDML V2.34Supply voltageLoad voltage L+•Rated value (DC)24V•Permissible range, low limit,static (DC)19.2V•Permissible range, high limit,static (DC)28.8V•Permissible range, low limit,dynamic (DC)18.5V•Permissible range, high limit,dynamic (DC)30.2V•Reverse polarity protection Yes•Non-periodic overvoltages35V DC for 500ms with a recoverytime of 50sInput currentCurrent consumption, max.Max. 140mA @ 24V DC +[DQ3×0.5A]Power lossTypical power loss 1.7WAddress rangeAssigned address range•Inputs32 bytes•Outputs32 bytesPower supply from SIMATIC S7backplane busCurrent consumption from ET 200SPbackplane busMax. 27mA @ 3.5V (SBK4)Analog load cell interfaceconnectionError limit according to DIN1319-1 at20°C (-4°F) +/-10KRelative accuracy(absolute accuracy can only beachieved with local calibration usingcalibration standards)≤0.002%v.E.Measuring accuracy in accordancewith OIML R76-1:2006/EN45501:2015•Class III•Resolution (d=e) 3 x 6000d•Error percentage pi0.4•Step voltage0.4µV/eAccuracy delivery stateThe accuracy is relevant for moduleexchange or theoretical adjustmentTyp. 0.1% v.E.Sampling rate 1.024msInput signal resolution±20000000Measuring ranges0...±1mV/V0...±2mV/V0...±4mV/VCommon mode voltage range+2.8…7.7VStrain gauge supply(constant voltage)10V DC (+1%/-3%) at the EXCterminalsShort-circuit and overload protection YesConnection6-wire or 4-wire (parameterizable)Sensor voltage monitoring Typ. ≤5.0VMin. strain gauge input resistance perchannel•Without SIWAREX IS Ex-i interface56ΩLower impedance by means of exter-nal supply possible•With SIWAREX IS Ex-i interface87Ω @ type 7MH4710-5BA180Ω @ type 7MH4710-5CAMax. DMS resistance4100ΩTemperature coefficient range≤±5ppm/KTemperature coefficient zero point≤±0.015μV/KLinearity error≤0.0025%Measured value filtering Low-pass and average value filterconfigurable (DR3)Galvanic isolation500V AC50Hz/ 60Hz noise suppressionCMRR>80dBInput resistance•Signal line Typ. 8*106Ω•Sense line Typ. 300*106ΩCable length•When using SIWAREX cable7MH4702-8AGMax. 500mAmbient conditionsAmbient temperature in operation•Horizontal mounting position *Min. -30°CMax. +60°C•Vertical mounting position *Min. -30°CMax. +50°CStorage and transport temperature-40...+70°C (-40...+158°F)SIWAREX WP3512Weighing ElectronicsSIWAREX weighing electronics for SIMATIC Dosing/filling/bagging and checking scales■Selection and ordering dataArticle No.Article No.TM SIWAREX WP351 weighing moduleSIMATIC ET 200SP ,TM SIWAREX WP351HF , legal-for-trade weighing module for automatic dosing and filling scales, check weighers and totalizing weighing instruments 7MH4138-6BA00-0CU0SIWAREX WP351 Equipment ManualAvailable in a range of languages Free download on the Internet at:/weighing/documentation SIWAREX WP351 "Getting Started" sample projectSample software shows beginners how to program the scales in TIA Por-tal V15.1Free download on the Internet at:/weighing/documentation SIWAREX WP351legal-for-trade verification set For verification of up to 3 scales consisting of3x labeling film for descriptive plate, 1x protection film,3x unlocking device,6x screw.Attention: For legal trade applications please follow the local laws applying in the country of verification.ET 200SP BaseUnit type U0•For constructing a new potential group (white)6ES7193-6BP00-0DU0•For continuing an existing potential group (gray)6ES7193-6BP00-0BU0Shield connection for ET 200SP Includes 5 shield connections 6ES7193-6SC00-1AM0SIWAREX JB junction box, aluminum housingFor connecting up to 4 load cells in parallel, and for connecting multiple junction boxes.7MH5001-0AA20SIWAREX JB junction box, stainless steel housingFor connecting up to 4 load cells in parallel.7MH5001-0AA00SIWAREX JB junction box, stainless steel housing (ATEX)For parallel connection of up to 4 load cells (for zone allocation, see manual or type-examination certificate).7MH5001-0AA01SIWAREX IS Ex interfaceFor intrinsically-safe connection of load cells. With ATEX approval (not UL/FM). Suitable for SIWAREX elec-tronic weighing systems. Compatibil-ity of load cells must be checked separately.•With short-circuit current <199mA DC7MH4710-5BA •With short-circuit current <137mA DC7MH4710-5CA Cable (optional)Cable Li2Y 1x 2x 0.75ST +2x (2x 0.34ST)–CYFor connecting SIWAREX electronic weighing systems to junction box (JB), extension box (EB) and Ex inter-face or between two EBs. For perma-nent installation. Occasional bending is possible.External diameter:approx. 10.8mm (0.43inch)Permissible ambient temperature -40...+80°C (-40...+176°F) Sold by the meter.•Sheath color: orange7MH4702-8AG •For hazardous atmospheres. Sheath color: blue.7MH4702-8AFCommissioningCommissioning charge for one static scale with SIWAREX module (Flat charge for travel and setup must be ordered separately)9LA1110-8SN50-0AA0Scope:•Recording of data•Checking of mechanical installation of the scale•Checking of electrical wiring and function•Static adjustment of the scale Requirements:•Mechanical design functional •Modules electrically wired and tested•Calibration weights available •Free access to scaleFlat charge for travel and setup in Germany9LA1110-8RA10-0AA0。

称重模块产品适用场合：防爆模式有三种：本安型隔爆型复合型本安型:对电子衡器的所有部件均采用本安型防爆措施适用于绝大多数的爆炸性环境。

本安型防爆标志. ExibⅡCT4/T5，隔爆型：对电子衡器的某些部件采用隔爆箱进行隔离防爆，但隔爆箱以外的部件及接口仍需进行本安处理。

隔爆型防爆标志：ExiadⅡBT6，复合型：电子衡器的所有部件一部分放置在危险区，另一部分放置在安全区，一般在危险区的传感器、接线盒等均用本安型，然后在安全区通过关联设备和普通仪表相连。

此模式由于操作是在安全区，所以配置相当灵活。

复合型防爆标志：ExiaⅡCT6。

称重模块功能：1、传感器激光焊接密封、环境适应性强；2、球形连接件、始终保持模块的垂直称重状态；3、支撑螺栓、防止设备倾覆且方便维护；4、接地装置、保护传感器免受电源浪涌冲击；5、过载保护装置、保护传感器免受冲击力称重模块分类：1.静载称重模块：主要适用于侧向力较小的静载荷称重场合。

静载称重模块可以非常方便地安装在各种形状的容器上。

、静载称重模块图：2.动载称重模块：主要适用于承受水平作用力的机械装置如流水线、传送带等，另外动载称重模块还可用于机械平台称改造。

动载称重模块图：称重模块安装注意事项：1、称重模块的安装的时候一定要保证称重模块安装在固定式模块的对角上，两个安装点之间距离是所有安装点间长的。

2、假如您选择的是称重模块采用不锈钢材料，有效抵御腐蚀性物质侵蚀。

固定、浮动、半浮动三种结构，可在各种恶劣条件下使用。

安装时选用一个固定式模块，一个半浮动模块及一到二个浮动式模块。

3、在采用四只动载称重模块的安装方式中，一般其中两只称重模块的三面受限位，另外两只称重模块只在端部限位。

4、静载称重模块安装方式一般采用的是不锈钢材料，有效抵御腐蚀性物质侵蚀。

固定、浮动、半浮动三种结构，可在各种恶劣条件下使用。

下面我们再来说说称重模块的安装调试时的注意事项：（1）调试前一定要检查每个称重模块的支撑螺杆顶部螺母是否已松开。