EtherCAT is a real-time industrial Ethernet technology proposed by German BECKHOFF Automation Company in 2003. It features high speed and high data efficiency, and supports multiple device connection topologies. Its slave station node uses a dedicated control chip, and the master station uses a standard Ethernet controller.
EtherCAT is an industrial Ethernet technology, and most of the application scenarios seen are servo motors. Because it is an Ethernet-based technology, EtherCAT is much faster than CAN bus. EtherCAT can reach a rate of 100M, while CAN is only 1M. In addition, EtherCAT also has the characteristics of low latency and precise synchronization.
Whether it is Industry 4.0 or the Internet of Things, a high degree of networking and powerful communication capabilities between devices and servers are required. EtherCAT is a relatively mature industrial Ethernet field bus, dedicated to the field of motion control. Compared with the traditional industrial fieldbus, EtherCAT has many advantages such as high stability, high real-time performance, high integration, strong scalability, and easy installation. It breaks through the system limitations of traditional Ethernet solutions and is widely used in the field of industrial control.
EtherCAT control system generally consists of HMI/WEB interface system, master station controller, several slave station controllers and servo motors. The HMI/WEB interface system is used to send control commands and display the human-machine interface; the EtherCAT master station is generally realized by embedded hardware, Linux system patching in real time and EtherCAT master station software, and the communication of the master station EtherCAT is realized through the Ethernet card. The EtherCAT communication is adopted between the master station controller and the slave station controller, which can realize the real-time control and real-time data transmission of the closed-loop servo system.
EtherCAT control system architecture
Based on the master controller of the MYC-YT507H core board, the software part can realize more intelligent EtherCAT master control by applying Preempt_RT real-time patch to the kernel and transplanting the EtherCAT open source master software IGH.
Data communication is carried out through T507-H's original Gigabit general Ethernet interface and WEB MES system; the original 100M dedicated EtherCAT interface communicates with the slave station servo drive for EtherCAT communication, so as to control the servo motor in real time; RS485 interface connects serial sensors The device collects data such as temperature and pressure; the input and output of digital signals are connected through the DI/DO interface; because the T057-H does not support the CAN function natively, it is used to connect CAN bus devices through SPI to CAN; in addition, an HDMI interface is provided , for interface communication with the human-machine interface or display.
Master station controller based on MYC-YT507H core board
The MYC-YT507H core board adopts the domestic car-grade processor Quanwin T507-H, which has the most stringent quality standards, ultra-high performance, rich peripheral resources, high cost performance, and long delivery time. It is suitable for high-performance smart phones. The core board requirements required by the device.
Mill MYC-YT507H core board
ØSuper computing performance: quad-core Cortex™-A53 CPU, 1.5GHz main frequency, equipped with G31 GPU, supports 4K@60FPS H.265 video decoding, supports 4K@25FPS H.264 video encoding;
ØRich multimedia support: support LVDS, HDMI, RGB and CVBS four display output interfaces, can support dual-screen simultaneous display, dual-screen different display, to meet the needs of multi-screen application scenarios; support MIPI CSI, DVP camera input;
Ø Rich peripheral expansion: support dual network ports, 4 USB2.0 interfaces, 1 SPI, 5 UARTs, and 2 SDIOs.
ØReliable quality: Onboard Allwinner T507-H processor, PMIC power management chip, LPDDR4, eMMC, core board PCB size 43mmx45mm, SMD package, 10-layer PCB board immersion gold process, firm and reliable.
Mill supporting M YD-YT507H development board
