Diseño y construcción de una red de sensores CAN controlados y supervisados a nivel de planta mediante el protocolo Ethernet industrial

Abstract

The objective of this project was the design and construction of a sensor network working under the industrial CAN protocol and that had to be supervised and controlled at operator level through an HMI working on an industrial Ethernet LAN. To achieve this objective, the old CAN network was redesigned with new AT90CAN32 microcontrollers that have better characteristics. Then an HMI was implemented over LAN over industrial Ethernet with the purpose to have access to the CAN network from any station connected to the Ethernet LAN. In the HMI, the three slave processes connected to the CAN network can be supervised and controlled. The information obtained from the three mini stations of temperature, level and on/off sensors derived into a centralized control, from a master node, very efficient. The results obtained in the designed tests demonstrated that the data transmission from the sensors to the HMI had a 100% of reliability, reaching communication speeds that allowed to have a time response of about two hundredth seconds, which is in the values recommended by ISA for the industrial networks at field level.