Research and implementaion of the group function block based on PLCopen
WANG Fukang, ZHANG Deli, ZHOU Wei
(College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
 

Abstract: Aiming at the problems that PLCopen singleaxis and master/slave multiaxes function blocks could not complete the complex multidimensional motion control, the execution mode and the preservation and transmission of motion parameters of the PLCopen group function block were studied. The structure queue method was proposed and the PLCopen group function block was designed and implemented to achieve the coordinated multiaxes motion control. First, the method of establishing the message queue was used to achieve the BufferMode function of the PLCopen, which was able to realize the motion control of several modes. Then, the preservation and transmission of motion parameters were realized by establishing the structure body. Finally, based on the hardware platform with IPC and the PMAC motion control card, taking group linear function block as an example, experimental verification of the group function block was carried out. The results indicate that the group function block which executes accurately is able to achieve the coordinated multiaxes motion control in several modes and meet the requirements in practical application.
Key words: PLCopen; group function block; coordinated multiaxes motion; motion control