A Multi-serial Port Server System with Redundant Active Standby and Load Balance

Abstract

The invention discloses a multi-serial port server system with redundant active / standby and load balancing. The system includes at least two multi-serial port servers, which are used to perform active / standby election through the active / standby signaling channel or load through the control signaling channel. Balanced control; at least one serial port device, used to upload serial port data to multiple serial port servers, and receive business data forwarded by multiple serial port servers; and a remote server, used to send business data to multiple serial port servers, and receive multi serial port server forwarding serial port data. The present invention performs active and standby election of multi-serial port servers through the active and standby signaling channels, realizes fast and seamless switching to the standby server when the main server fails, and improves the communication reliability of industrial equipment; Load balancing control, realize the ability to connect one serial port data to multiple serial port servers, and improve the load balance of serial port servers.

Description

technical field [0001] The invention relates to the field of industrial automation bus communication, in particular to a multi-serial port server system with redundant active backup and load balancing. Background technique [0002] At present, there are still many industrial automation applications that use industrial buses such as RS485 / 422 / 233 and CAN to realize industrial automation data acquisition and control; because such industrial buses usually have limited communication distances, they cannot meet the current needs of Industry 4.0; so many Manufacturers have launched RS485 / 422 / 233-to-Ethernet serial servers, and CAN-to-Ethernet CAN servers to use the ubiquitous Ethernet technology to expand the communication distance of industrial field buses. [0003] The more common serial servers on the market are 1 / 2 / 4 / 8 / 16 / 32-port serial servers; the most are 32-port serial servers; when more than 32-port servers are needed on site, there will be no equipment available. [000...

AI Technical Summary

Problems solved by technology

[0004] Most of the current serial servers are implemented by single-chip microcomputers, so the CPU and network processing capabilities are relatively weak. When the data of one serial port needs to be connected to multiple servers, the finished serial server may not be able to meet the requirements, and the bus can be expanded to more than 32 on a single CPU. When using a serial port device, due to too many interrupts, the CPU load is too heavy, and the performance of the whole machine is reduced, which cannot meet the high baud rate data transmission requirements of multi-port switches.

Images