Processor module for a programmable controller

Details Processor module for a programmable controller Processor module for a programmable controller

G - Physics

06

F

354/230.3

G06F 9/06 (2006.01) G06F 9/24 (2006.01) G06F 9/318 (2006.01) G06F 9/45 (2006.01)

Patent

CA 1184667

IMPROVED PROCESSOR MODULE FOR A PROGRAMMABLE CONTROLLER Abstract of the Disclosure A processor module is one of several modules mounted in a rack to form a programmable controller. The module has a microprocessor that executes a sequence of machine language instructions to interpret and thereby execute macroinstruc- tions that are part of a control program stored in a read/write volatile main memory. The rate of execution is improved by reducing the instructions in a fetch sequence used in coupling each macroinstruction to its interpreter sequence of machine language instructions. Hardware assistance is provided to allow expansion of macroinstruction operation codes as they are fetched. The processor module also allows the user to program his own interpreter sequences for specially defined macroinstructions and to load these sequences into a nonvolatile memory that is plugged into the module. An external auxiliary power supply is connected to the processor module to supply the programming voltage required by the nonvolatile memory.

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