Patent ID: 7293205

Claim:
An electronic control unit comprising: a first control circuit section that contains a program memory including input/output control means with respect to any external apparatus, a set data being a preliminarily set controlling constant, and communication control means; an operation processing RAM memory; a microprocessor cooperating with said program memory; and a first series-parallel converter; a second control circuit section that contains a communication control circuit section for exchanging monitoring and control signals, a data memory, and a second series-parallel converter; in which a serial communication of monitoring and controlling signals is carried out mutually between said first control circuit section and the second control circuit section via said first and second series-parallel converters; wherein said first control circuit section includes regular transmission means and storage constant confirmation processing means, and said second control circuit section includes regular report means; said regular transmission means regularly transmits in sequence a control output data or a constant set data from said first control circuit section to said second control circuit section, and stores said control output data or constant set data having been received at said second control circuit section in said data memory; said regular report means regularly reports confirmation information with regard to the whole or a part of constant set data that are stored in said data memory, from said second control circuit section to said first control circuit section; and said storage constant confirmation processing means compares reference information with regard to the whole or a part of said constant set data having preliminarily been set in said first control circuit section with confirmation information given by said regular report means, and retransmits a constant set data to said second control circuit section by said regular transmission means in the case of no coincidence as a result of comparison.