Visual detection signal input and output multi-machine communication cascade technology

Abstract

The invention relates to the technical field of communication cascading, and discloses a visual detection signal input and output multi-machine communication cascading technology. According to the invention, two TTL-to-RS422 level conversion chips are used, a pin 1 and a pin 4 of a U9 are used for supplying power, a pin 5, a pin 6, a pin 7 and a pin 8 of the U9 are connected with an upper level, and a pin 2 and a pin 3 of the U9 are connected with a serial port 1 of an MCU (Microprogrammed Control Unit) singlechip, namely upper-level equipment in a software program. A pin 1 and a pin 4 of a U17 supply power, a pin 5, a pin 6, a pin 7 and a pin 8 are connected with the next level, and a pin 2 and a pin 3 are connected with a serial port 3 of the MCU singlechip, namely next-level equipment in the software program. According to the invention, the input and output signal controller is expanded hierarchically, so that the signal control box can be expanded according to the demand when the customer demand is increased; the problem that a slave cannot initiate communication to a host actively is solved from the perspective of hardware; the slave can actively initiate communication to the host at any time. The expansion problem of the input and output signal controller and the problem that instant response cannot be achieved in master-slave communication are solved.

Description

technical field [0001] The invention belongs to the technical field of communication cascading, in particular to the visual detection signal input and output multi-computer communication cascading technology. Background technique [0002] At present, the common in-mold visual inspection system on the market, the general inspection process is that the signal controller of the in-mold visual inspection system collects the status signal of the injection molding machine, which is generally a switch signal or a voltage signal, and then encodes it into a digital signal according to a specific coding method and then passes it through the serial port. It is transmitted to the host computer of the in-mold visual inspection system. At this time, the host judges whether detection is required, followed by visual image processing, and then sends the result of visual image processing to the signal controller of the in-mold visual inspection system through the serial port according to a sp...

AI Technical Summary

Problems solved by technology

In this way, the conventional 8-input and 8-output signal controller will not be enough

A common solution is to increase the signal controller with 8 inputs and 8 outputs to 16 inputs and 16 outputs, but this will increase the variety of materials, and if the customer's demand increases one day and it is not enough, it needs to be increased to more Signal controller with multiple input and output

Images