模块端子 DSTA 001
the default values are:The purpose of the Profibus DP 默认值为：PFEA112中Profibus-DP通信的目的是在高级系统和PFEA112之间提供高速通信链路。Profibus-DP是一种多点通信协议，旨在将PLC连接到传感器（DP表示“分布式外围设备”）。物理接口为RS 485（双线电缆）。最大传输速率为12 Mbit/s。该协议基于主从原则。PFEA112是从设备。Profibus主设备始终轮询从设备，这意味着即使PFEA112没有新数据可用，轮询仍以固定的时间间隔进行。每个从设备的地址范围为0到125。Profibus要求从设备的消息格式、通信参数和错误代码在所谓的类型文件中可用，communication in PFEA112 is to provide a high speed communication link between superior systems and the PFEA112. Profibus DP is a multidrop communication protocol intended to connect PLCs to sensors (DP means “Distributed Peripherals”). The physical interface is RS 485 (two wire cable). The maximum transfer rate is 12 Mbit/s. The protocol is based on a master-slave principle. The PFEA112 is a slave. A Profibus master polls the slaves all the time, that means the polling is going on with a fixed time interval even when no new data is available from the PFEA112. Each slave has an address in the range 0 to 125. Profibus requires that the message format, communication parameters and error codes of slaves are made available in a so called type file,
