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Programmable logic controller with an extra memory

  • US 20040267380A1
  • Filed: 09/15/2003
  • Published: 12/30/2004
  • Est. Priority Date: 06/13/2003
  • Status: Abandoned Application
First Claim
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1. A programmable logic controller with an extra memory, comprising:

  • a PLC, comprising at least a memory storing a plurality of data codes and an indicating instruction, and a CPU for reading and executing the data codes;

    a data bus, connecting electrically to the CPU; and

    an extra memory, connecting to the data bus, comprising at least a data code;

    wherein after the indicating instruction stored in the memory has been read, the CPU reads the address of the extra memory to execute the data code stored in the extra memory.

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