ABB EI803F

第二种方法是在可能和实用的情况下,利用模块化的流程单元和其他更高级别的子系统,如智能电气设备,使加工厂设计保持灵活的I/O设计不使项目交付脱轨。这些子系统到达项目现场时,并不是使用一捆模拟电线将其物理化地组装到主要的自动化系统中,而是使用单一的(或冗余的)以太网电缆连接。在主控制系统中,由子系统供应商以及测量和控制参数数字映射到更广泛的策略,来实现较低级别的现场设备连接的微妙之处。据一些估计,今天超过50%的测量和控点不是在项目现场连接的,而是嵌入在更大的设备和刹车中

The second method is to utilize modular process units and other higher-level subsystems, such as intelligent electrical equipment, where possible and practical, to maintain flexible I/O design in the processing plant design without derailing project delivery. When these subsystems arrive at the project site, they are not physically assembled into the main automation system using a bundle of simulated wires, but are connected using a single (or redundant) Ethernet cable. In the main control system, the subtleties of connecting lower level field devices are achieved by mapping subsystem suppliers and measurement and control parameter numbers to broader strategies. According to some estimates, over 50% of today's measurement and control points are not connected at the project site, but embedded in larger equipment and brakes