In: Transactions of the Society of Instrument and Control Engineers, Vol. 27, No. 4, pages 466-473. April 1991. In Japanese.
Abstract: This paper proposes a high speed programmable controller which executes sequence control specified by a Petri net. The programmable controller can perform logical operations for checking and firing transitions in parallel using a special hardware unit, named the fire unit. It decreases scan time for picking up input signals by means of an interrupt mechanism. This programmable controller can be up to 100 times faster than conventional ones. The fire unit is designed using gate level logic, and it is shown that it can be implemented as an ASIC memory in VLSI technology.
Keywords: net-based high-speed programmable controller; gate level logic; ASIC memory (in) VLSI (technology).