Queue function making method for programmable-logic controller, involves processing received command, if controller does not processes command, and retrieving commands with priority, after controller has completed processing of commands

摘要

#CMT# #/CMT# The method involves receiving a command from a terminal (1), and judging whether a programmable-logic controller (PLC) (3) processes the command. The received command is processed, if the PLC does not processes the command. The received command is saved in a command queue (32), if the PLC processes another command. The commands are retrieved with the highest processing priority, after the PLC has completed processing of the commands. A network bus (2) is provided for connecting the PLC and the terminal. #CMT# : #/CMT# An independent claim is also included for a programmable-logic controller comprises a microcontroller unit. #CMT#USE : #/CMT# Method for making a queue function in a programmable-logic controller (claimed) in a factory automation industry. #CMT#ADVANTAGE : #/CMT# The commands are retrieved with the highest processing priority, after the programmable-logic controller has completed processing of the commands in an accurate manner without losing data. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a block diagram of a programmable-logic controller with queue function.'(Drawing includes non-English language text)' 1 : Terminals 2 : Network bus 3 : Programmable-logic controller 32 : Queues 33 : Microcontroller unit.