07KT93  基本模块

产品：07KT93

说明：07KT93基本模块以太网 AC31

附加信息

ABB型号名称：07KT98-乙醚

环境空气温度：操作 0 ... +55 °C 存储 -25 ... +75 °C

模拟输入：8 通道， 0 ... +5V， -5 ... +5V， 10 位 +符号， 0 ... +10V， -10 ... +10V， 11 位+符号， 0 ...20毫安， 4 ...20mA，PT100（2或3线），12位，双极性，模拟输入也可用作数字输入

模拟输出：4 通道， -10 ... +10V， 11 位 + 符号， 0 ...20mA，12位

集散控制系统（Distributed Control System－DCS）集计算机技术、控制技术、通信技术、CRT技术于一体，广泛应用于生产过程控制系统。随着计算机和网络技术的飞速发展，产生了一种新型的控制系统———现场总线控制系统（Fieldbus Control System－FCS）。但国内生产企业的情况是：大多数企业还处于模拟仪表和人工控制的阶段，采用DCS控制系统的企业仍是少数。由于DCS应用广泛、技术成熟，在现有的技术条件和市场条件下，FCS还不能完全取代DCS，而且目前现场总线设备和系统还十分昂贵。因此，除了新建企业外，国内企业在较长时间不可能全面采用现场总线技术，而必须走逐步发展、过渡的道路。 ??我们在上海石化股份公司环保部水质净化厂监控系统的改造项目中，对3个生产单元已有的DCS和PLC进行改造，增加通信功能，实现总调度室对各生产装置的集中监控。

根据水质净化厂各生产单元的功能和建设阶段，分为厂外调节池、污水一段、氧化沟、四期污水处理、污泥脱水、污泥干化6个生产单元。另外，在厂部设有总调度室，但是总调度室的监控水平较为落后，改造之前基本上不能对各个生产单元进行监控。为了适应生产需要，提高生产效率，改善操作条件，加强监控手段，确保各生产装置的正常运行，急需对各生产单元和总调度室进行技术和设备的更新改造，从而能在总调度室对各装置进行监视管理，及时了解各装置的运行情况，达到指挥及时和调度准确的目的。

现场监控系统的改造 ??现场监控系统的改造要充分利用原有仪表和设备，主要考虑可靠性和实时性。首先对自控程度较高的3个单元进行改造，四期污水处理生产单元控制设备配置了两套ALLEN－BRADELY公司PLC设备。25块开关量输入信号卡，可采集384点信号；7块开关量输出信号卡，可输出112点信号；3块模拟量输入信号卡，可采集24点信号。两套AB—PLC通过DH＋（数据高速通道）实现数据共享。

在原有的现场控制计算机上分别增加以太网卡，通过以太网将实时数据送到总调度室处理。出192点信号；1块模拟量输入信号卡，可采集8点信号。系统运行采用遥控开关操作与全模拟流程盘显示。在原有的Siemens S5－115UPLC上增加RS－232通讯模块（CP524）和1台现场操作站，用点对点方法连接，使PLC的数据通过现场操作站送到以太网上，与总调度室监控计算机通信。但RS－232传输速率只有9600bps，操作站仅对现场起到监视作用。

07KT93  基本模块

Product: 07KT93

07KT93 Basic module Ethernet AC31

Additional information

ABB Model name: 07KT98-Ether

Ambient air temperature: Operation 0... +55 °C storage -25... +75 °C

Analog input: 8 channels, 0... +5V, -5... +5V, 10-bit + symbol, 0... +10V, -10... +10V, 11 bit + symbol, 0... 20 mah, 4... 20mA, PT100 (2 or 3 wire), 12-bit, bipolar, analog inputs are also available as digital inputs

Analog output: 4 channels, -10... +10V, 11 bit + symbol, 0... 20mA, 12 bits

Distributed Control System (DCS), which integrates computer technology, control technology, communication technology and CRT technology, is widely used in production process control system. With the rapid development of computer and network technology, a new type of Control System, Fieldbus Control System (FCS), has been produced. However, the situation of domestic production enterprises is that most enterprises are still in the stage of analog instrumentation and manual control, and enterprises using DCS control systems are still a minority. Due to the wide application of DCS, mature technology, under the existing technical conditions and market conditions, FCS can not completely replace DCS, and the current fieldbus equipment and systems are still very expensive. Therefore, in addition to new enterprises, domestic enterprises can not fully adopt fieldbus technology for a long time, and must take the road of gradual development and transition. ?? In the renovation project of the monitoring system of the Water purification plant of the Environmental Protection Department of Shanghai Petrochemical Co., LTD., we reformed the existing DCS and PLC of 3 production units, increased the communication function, and realized the centralized monitoring of each production unit by the general dispatching room.

According to the function and construction stage of each production unit of the water purification plant, it is divided into six production units: outside the plant regulation tank, sewage stage one, oxidation ditch, sewage treatment stage four, sludge dehydration and sludge drying. In addition, there is a total control room in the factory, but the monitoring level of the total control room is relatively backward, and it is basically impossible to monitor each production unit before the transformation. In order to meet the production needs, improve production efficiency, improve operating conditions, strengthen monitoring means, and ensure the normal operation of each production unit, it is urgent to update the technology and equipment of each production unit and the total dispatching room, so as to monitor and manage each device in the total dispatching room, timely understand the operation of each device, and achieve the purpose of timely command and accurate dispatch.

The transformation of the field monitoring system? The transformation of the field monitoring system should make full use of the original instruments and equipment, mainly considering the reliability and real-time. First of all, the three units with a high degree of self-control were reformed, and two sets of ALLEN-BRADELY PLC equipment were configured in the control equipment of the fourth stage sewage treatment production unit. 25 switch input signal card, can collect 384 points signal; 7 switch output signal card, can output 112 points signal; 3 analog input signal cards, can collect 24 points of signal. Two sets of AB-PLCs share data through DH+ (Data High speed Channel).

Ethernet card is added to the original field control computer, and the real-time data is sent to the total dispatching room for processing through Ethernet. 192 points signal; 1 analog input signal card, can collect 8 points of signal. The system uses remote control switch operation and full analog flow panel display. The RS-232 communication module (CP524) and a field operation station are added to the original Siemens S5-115UPLC, which is connected by point-to-point method, so that the PLC data is sent to the Ethernet through the field operation station, and the communication with the monitoring computer in the general dispatching room. However, the RS-232 transmission rate is only 9600bps, and the operation station only plays a monitoring role on the site.