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Data transmission method for microprocessors in a programmable logic controller

  • US 20040260851A1
  • Filed: 08/22/2003
  • Published: 12/23/2004
  • Est. Priority Date: 06/17/2003
  • Status: Abandoned Application
First Claim
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1. A data transmission method for microprocessors in a programmable logic controller, which defines two microprocessors as a master microprocessor and a slave microprocessor, which method is characterized in that:

  • the master microprocessor and the slave microprocessor have two corresponding I/O pins for sending and receiving data signals through one pin and sending pulse-wave signals through the other.

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