ABB CI534V02 3BSEO10700R1

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。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，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。输出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。

Distributed Control System (DCS) integrates computer technology, control technology, communication technology, and CRT technology, and is widely used in production process control systems. With the rapid development of computer and network technology, a new type of control system, Fieldbus Control System FCS, has emerged. However, the situation of domestic production enterprises is that most of them are still in the stage of analog instruments and manual control, and there are still a few enterprises that use DCS control systems. Due to the widespread application and mature technology of DCS, under existing technical and market conditions, FCS cannot completely replace DCS, and the current fieldbus equipment and systems are still very expensive. Therefore, except for newly established enterprises, domestic enterprises cannot fully adopt fieldbus technology for a long time, and must take a path of gradual development and transition. In addition, there is a general control room in the factory headquarters, but the monitoring level of the general control room is relatively backward, and before the renovation, it is basically unable to monitor various production units. In order to adapt to production needs, improve production efficiency, improve operating conditions, strengthen monitoring methods, and ensure the normal operation of each production unit, it is urgent to update and transform the technology and equipment of each production unit and the general dispatch room, so as to monitor and manage each device in the general dispatch room, timely understand the operation of each device, and achieve the goal of timely command and accurate dispatch. The renovation of the on-site monitoring system should fully utilize the existing instruments and equipment, mainly considering reliability and real-time performance. Firstly, three units with high levels of self-control were renovated, and two sets of ALLEN-BRADELY PLC equipment were equipped for the control equipment of the sewage treatment production unit. 25 switch input signal cards, capable of collecting 384 signals; 7 switch output signal cards, capable of outputting 112 signals; Three analog input signal cards capable of collecting 24 signal points. Two sets of AB-PLC achieve data sharing through DH+(data high-speed channel). Add Ethernet cards to the existing on-site control computers and send real-time data to the main dispatch room for processing through Ethernet. Output 192 signal points; 1 analog input signal card capable of collecting 8 signals. The system operates using remote control switch operation and full simulation process panel display. Add an RS-232 communication module (CP524) and one on-site operation station to the original Siemens S5-115UPLC, and connect them using a point-to-point method. This allows the PLC data to be sent to the Ethernet through the on-site operation station and communicated with the monitoring computer in the main dispatch room. But the RS-232 transmission rate is only 9600bps, and the operating station only plays a monitoring role on site.