| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent adverse influence on an operation-system PGK signal in the case of inserting/ejecting a non-operation package (PGK) in a redundant configuration system. SOLUTION: Once alarm has been issued by PGK 1 when PGK 1 is used as an operation system, a changeover request generating part 3a recognizes the alarm and generates a changeover request in control PGK 3. An onboard power on/off control part 3b permits the onboard power of PGK 2 to be off till the change-over request is received and turns on the onboard power of PGK 2 when the changeover request is received. Then, the onboard power on/off control part changeover a system by permitting the onboard power of PGK to be off.</p> |
