Patent ID: 7398447

Claim:
A method for transmitting a plurality of intercommunicating signals parallel to one another from a first processor unit to a second processor unit of a duplex processor apparatus, said method comprising the steps of: changing said intercommunicating signals supplied from said first processor unit into a serial signal having a redundancy data structure; reproducing said intercommunicating signals in the form of parallel signals from said serial signal; and supplying the reproduced intercommunicating signals to said second processor unit, wherein, said step of changing said intercommunicating signals into a serial signal having a redundancy data structure is conducted at a transmitting portion of a duplex processor apparatus at a timing of a first timing signal, said intercommunicating signals comprises parallel operation mode signals which include an ACTN signal representative of being an active system, a SYCN signal representative of being in a duplex operation, and a RUNN signal representative of a processor being in execution, the operation mode signals defining active and standby systems in a duplex processor apparatus, prior to said reproducing step, the further step of sending the serial output signal to a receiving portion of the duplex processor apparatus, said reproducing step further produces a parity check timing signal obtained by reproducing the first timing signal, and at the receiving portion, the further step of, with said reproduced redundancy data, evaluating said redundancy data for an error in said reproduced intercommunicating signals.