ECR series is a high-speed Fieldbus type closed-loop stepper driver based on closed-loop stepper, combined with EtherCAT Fieldbus technology. It supports COE(CANopen over EtherCAT) protocol, conforms to CiA402 standard, and the Fieldbus transmission rate can reach 100Mb/s, which can realize closed loop. The real-time control and real-time data transmission of the stepping system has the advantages of high performance, high transmission speed and high reliability communication.