MVME172-343A现货PLC自动化卡件

类目：MOTOROLA
型号：MVME172-343A
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MVME172-343A现货PLC自动化卡件

Modbus主站再通过DP通讯模块接入DP总线，这样就可以实现所有现场设备（Modbus从站）与中央监控室（DP主站）之间的数据交换，完成数据采集与控制功能。
图2
图2
图2 基于和利时PLC的无线监控系统
图3为数据流程示意图，每个模块之间的通讯都是双向的。对于污水池采集上来的数据，模拟量通过模拟量输入模块LM3310输入到下位LM3107模块（Modbus从站），开关量直接输入下位LM3107模块（Modbus从站），上位采用1个LM3107CPU模块与1个LM3401DP从站模块连接到DP网络中。下位的LM3107通过RS232与无线通讯模块连接作为Modbus从站，上位的LM3107通过RS232与无线通讯模块连接作为Modbus主站。LM3107模块支持标准的Modbus
RTU
协议，所以上位与下位LM3107之间采用Modbus通讯。上位的LM3107再通过LM3401DP从站模块与中央监控室进行数据交换。无线通讯可以根据实际情况选择如下Modbus通讯参数：校验：奇校验、偶校验、无校验位数：7位、8位波特率：300bps 、600bps、1200bps、2400bps、4800bps、9600bps、 19200bps、38400bps
图3
图3
图3 数据流程示意图
4 方案优势本文提出的解决方案具有如下优势： 1. 只需要1条DP线就可以把所有污水池采集的数据传送到中心监控室DP主站，与传统通信方案相比节省了大量通讯线缆，同时也减小了线缆施工工作量，提高了系统的可靠性和可维护性。 2. 采用无线通讯方式，数据传输距离长，数据利用天线透传，传输的距离与天线有关，多5K米。 3. 采用LM3107可以实现多247个Modbus从站互联，节省了每个污水池的DP从站模块费用，取而代之的是每个污水池做为Modbus从站存在，只需要1个DP从站即可实现所有的污水池数据与中心监测站数据的交换。 5 结束语经过一段时间的调试和试运行，由HOLLiAS-LEC G3系列小型一体化PLC作为控制系统的无线监控方案已成功应用于污水处理现场。实践证明，该设计方案整体成本较低、数据传输距离长、可靠性好、抗干扰能力强、维护成本低、可操作性高，在市场中具备强有力的竞争能力，为污水处理行业增添了一套完善的解决方案。PLC
作为一个新兴的工业控制器，以其体积小,功能齐全，价格低廉，可靠性高等方面具有独特的优点，在各个领域获得了广泛应用。作为国内大的印刷机生产厂家---北人集团公司，为了使产品性能稳定，易于维护，我们采用了以PLC为主控器的控制方案。由于双色印刷机要求易于操作，精度高，故其输入，输出点较多，因此采用了双机通讯。上位机采用三菱FX2N-80MR+32EX+4D/A，主要负责主传动的控制，各机组离合压的控制，以及气泵，气阀的控制等。下位机采用三菱 FX2N-64MR+4A/D,主要负责水辊
电机
的控制，主传动的调速输出，调版电机数据采集等。同时选用了一台三菱5.7寸触摸屏，主要负责水辊电机速度显示，调版显示，以及整机故障显示等。本系统运行可靠，维护方便，操作简便直观，大大提高了胶印机的档次，受到用户好评。 2 系统结构本系统结构图如下：其中，上位机与下位机采用了RS485通讯，通讯方便，可靠。对多色机而言，安全因素很重要。continuous production, the long mixing time in the slurry tank hinders the continuous production of papermaking. Therefore. Expansion agent can be added to the stock. After mixing evenly, it is sent to the slurry tank through double disc mill. This can not only maintain the continuity of papermaking, but also improve the expansion degree of pulp. c. Before the expansion agent is added into the slurry tank, it shall be diluted and mixed with 1 ~ 3 times of clean water or white water. D. Generally, the pH of pulp is 6 ~ 7, which is suitable for the use of expansion agent and has good expansion effect. The pH value of bagasse pulp is generally greater than 7. The dosage of expansion agent should be increased slightly. Generally 0.5%, that is, it has good effect. (3) Effect of expansion agent through experiments and application tests in paper mills, the results show that the expansion agent we developed has the following effects: A. expansion effect. The finished paper made by adding expansion agent into pulp is fluffy, elastic and can basically maintain the original strength. Table 3 lists the same amount of expanded wood pulp with different diameter as the raw material.

The data in the table shows that the expansion degree is 5.5% when 0.3% expansion agent is usually added to wood pulp, that is, the mass of web paper with the same volume decreases by 5.5%, that is, about 1.1g. B. reduce the paper making quantity, and the volume of pulp increases after expansion. The test shows that the pulp raw materials required for making the same volume of finished toilet paper are 3% ~ 10% lower than the original, and generally 5%. Therefore, after using the expansion agent, the raw materials are saved and the cost is reduced. c. Softening effect the finished paper made by adding the expansion agent has good softness and feels smooth, delicate and plump when used. Therefore, when using this product, there is no need to add softener. At present, many domestic paper manufacturers improve the softness of paper by adding softener. Generally, the dosage of softener is generally 0.5% ~ 1.5% of dry pulp, while the dosage of expansion agent developed in this work is 0.3% ~ 0.5%. In addition, the price of this product is cheaper than softener, so it can not only save cost but also improve the quality of paper. D. Increase the dehydration of papermaking mesh blanket. The surfactant in the expansion agent can reduce the surface tension of water droplets in the mesh blanket during the papermaking process, which is conducive to removing the dirt and fine fibers on the surface of the mesh blanket, so as to improve the dehydration performance of papermaking mesh blanket. E. Reduce dust flying. After the paper sheet is dried by the drying part of the paper

RELIANCE

ABB

GE

FOXBORO

EMERSON艾默生

A-B

MOTOROLA

TRICONEX

HONEYWELL霍尼韦尔

HIMA

140系列PLC

BENTLY本特利

其他

SST

EPRO

YOKOGAWA

MOOG

NI

WOODWARD伍德沃德

METSO

KOLLMORGEN科尔摩根

力士乐

ALSTOM阿尔斯通

YASKAWA安川

AMAT

ICS TRIPLEX

新能源系列

EATON

MVME172-343A现货PLC自动化卡件

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