摘要
以西门子S7-300与S7-1200系列PLC间的通信为例,介绍了西门子PLC单边通信在矿井水处理控制系统中的应用。在工程实例中分析了MPI、DP、PN等通信接口的特点,根据无法现场修改原有PLC配置这一特殊情况选择通过工业以太网建立单边通信连接,分析了该单边通信的硬件组态和软件编程,通过调用PUT、GET通信指令顺利实现单边通信并完成数据交换。结果表明:该单边通信只需在单侧进行编程,无需改变对侧PLC的软硬件组态,简便地实现了PLC之间的数据交换。
The communication between the Siemens PLCs of S7-300 and S7-1200 was chosen as an example to introduce the application of unilateral communication in the control system of mine water treatment. Communication interface characteristics such as MPI, DP and PN were analyzed to realize the data exchanges between PLCs. For the reason that the original PLC could not be modified on spot, unilateral communication connections were established based on industrial Ethernet. The hardware configuration and software programming of this unilateral communication were presented. The unilateral communications and data exchanges were completed by calling the instructions of PUT and GET. The result shows that data exchanges between the PLCs can be simply realized by unilateral programming without changing the offside hardware or software configuration.
作者
洪飞
HONG Fei(Hangzhou Environmental Protection Research Institute of China Coal Technology ＆ Engineering Group, Hangzhou 311201, Chin)
出处
《能源环境保护》
2018年第1期24-26,9,共4页
Energy Environmental Protection
关键词
以太网
PLC
单边通信
矿井水处理
控制系统
Ethernet
PLC
unilateral communication
mine water treatment
control system.
