High speed backboard bus communication control device and method

Abstract

The invention discloses a high speed backboard bus communication control device. The high speed backboard bus communication control device comprises a CPU, a programmable logic controller (PLC), a first M-LVDS (Multipoint low Voltage Differential Signaling) interface, a second M-LVDS interface, a first hot swap control circuit and a second hot swap control circuit, wherein the PLC includes a transmission module, a transmission dual-port RAM, a transmission CRC verification module, a parallel-to-serial module, a serial-to-parallel module, a reception CRC verification module, a reception dual-port RAM and a reception module. The high speed backboard bus communication control device and method utilize an M-LVDS as the transmission level, so that a communication rate more than 100Mbps and even higher can be realized. And at the same time, when a module performs hot swap, a power supply hot swap circuit guarantees that hot swap of the module does not cause impact of the power supply for the module and other on-line modules so as to guarantee normal working of the system; and hot swap for the bus can be automatically identified, so that different bus scanning flows can be started and the utilization efficiency of the bus can be improved.

Description

Technical field [0001] The invention belongs to the field of communication technology, and particularly relates to a high-speed backplane bus communication control device and method. Background technique [0002] Generally, the hardware structure of a large-scale PLC system or measurement and control device is generally composed of a power supply module, a central processing unit (CPU) module, an industrial real-time Ethernet communication master and slave station, an IO module, a dedicated function module and a backplane. The software consists of It consists of programming configuration software, industrial real-time Ethernet communication scheduling software and various IO module application software. In the large PLC or measurement and control device, according to the different application requirements of the industrial control site, modules with their required functions can be configured in each position in the plug-in box to form a flexible and complex industrial measurement...

AI Technical Summary

Problems solved by technology

[0007] Generally, large-scale PLC or measurement and control system adopts CAN bus or RS485 bus, and there are also some self-defined high-speed communication buses, but its communication rate cannot reach 100Mbps, and it does not support hot-swappable functions, etc., and its modules are online and offline. Always scan the module, resulting in reduced bus utilization

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