Design and implementation of a fast DIO digital I/O and motion control system

Abstract

High speed PC-based DIO (Digital I/O) system that consists of a master device and slave I/O devices is developed. The master device, which has PCI interface to a PC, controls all of serial communications, reducing the load on the CPU to a minimum. And the slave I/O devices, which are used as 16 bits input, 16 bits output, and 8bits input-output each, are connected from the master device to one slave, from the slave to the next slave, and to a maximum 64 slaves repeatedly. The master device has 2 rings which can take 64 slaves each. Therefore, total I/O points covered by the master are 2048 points. The slave features 3 types of input/output function interchangeability by DIP switch settings. Library, application, and device driver software for the DIO system that have a secure and a convenient functionality are developed. © Springer-Verlag Berlin Heidelberg 2006.