| 摘要 |
PURPOSE:To easily confirm visually in which package an abnormality is generated, by comparing and deciding an executing state of an internal diagnosis of a package in a system, and information of a result, by a central processing unit. CONSTITUTION:A processor unit (PU) 104 executes an internal diagnosis in accordance with a diagnostic command of a central processing unit 101. That is, the PU 104 diagnoses whether a circuit part 105 which has contained a peripheral I/O, etc. is normal or not, based on a program which is set in advance. When a result of diagnosis is normal, a signal output part 106 whose output terminal is formed by an open collector sets a signal line M to H and outputs a diagnostic signal PKG. On the contrary, if a result of diagnosis is abnormal, the signal line M is held in L. The central processor 101 decides and displays whether an abnormality is generated in a package connected to the signal line corresponding to which PKG of PKGs 1-8. |
