Distributed frame type equipment and method for serial ports of main control unit and take-over interface unit

Abstract

The invention provides distributed frame type equipment and a method for serial ports of a main control unit and a take-over interface unit. The distributed frame type equipment comprises the main control unit and the interface unit, wherein the main control unit comprises a first micro CPU; the interface unit comprises a second micro CPU and a switch; the first micro CPU is connected with the second micro CPU through an order passage and sends a take-over order or a stopping take-over order to the second micro CPU, and the switch controlling the interface unit connects serial port transmit-receive wires with the main control unit according to the take-over order from the first micro CPU, or the switch controlling the interface unit cuts off the serial port transmit-receive wires from themain control unit according to the stopping take-over order from the first micro CPU. The invention can simply and efficiently obtain the starting information of the interface unit.

Description

technical field [0001] The invention relates to the technical field of distributed equipment, in particular to a distributed frame equipment and method in which a main control unit takes over the serial port of an interface unit. Background technique [0002] A distributed frame device includes a main control unit and an interface unit. Each unit generates startup information during startup and outputs the startup information through the serial port. From the user's point of view, only the serial port of the main control unit can be used, while the serial port of the interface unit is invisible to the user. Since the start-up information is very important for equipment maintenance, in the prior art, in order for the user to obtain the start-up information of the interface unit, the following two methods are usually adopted to upload the start-up information of the interface unit to the main control unit. [0003] The first type, such as figure 1 , figure 1 It is a schemat...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: in the initial stage of the startup of the interface unit, the network port channel is unavailable, and a large amount of startup information generated at this time cannot be transmitted to the main control unit; it is physically dependent on the network port channel, and when the network channel is abnormal, it cannot upload the startup information. information; if multiple interface units upload startup information at the same time, when packet loss occurs, the information received by the main control unit will be incomplete

The disadvantage of this method is: firstly, the software implementation is complicated, which is manifested in the following aspects, 1) the interface unit must ensure that each data sent from the serial port controller 1 is also sent to the serial port controller 2; 2) the communication protocol needs to be customized , to ensure that only one interface unit uploads data to the main control unit at the same time, and the main control unit needs to process the data received by the RS485 interface chip, which can be buffered or output to the serial port, such as the console (Console) serial port

Second, the hardware needs an RS485 interface chip, and each interface unit needs an additional serial port controller, so more hardware components are needed

[0005] It can be seen from the above that neither of the existing two methods can obtain the startup information of the interface unit simply and efficiently.

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