| 摘要 |
PURPOSE:To make a large-capacity ROM unnecessary to execute a desired diagnosis, by storing a diagnostic microprogram in the ROM of a maintenance device having a changeover switch, indicator lamp, etc. and connecting this program to the main body side when faults are diagnosed. CONSTITUTION:The program which controls the normal operation of a main body is store in an intrasystem control storage CS22 of a main body side controlling computer part 6, and readout data of the CS22 is transferred to a pipeline register 25 through a data bus 23, and a part of readout data is supplied to a sequencer 26. The address signal outputted from the sequencer 26 is inputted as the execution address of the next program to the SC22 through an address bus 24 and is inputted to a control storage of a maintenance panel 1 also. A diagnostic program is stored in this storage, and a changeover switch 8 is switched by a start switch 9 of the panel 1 to output the diagnostic program to the computer part 6 when faults are diagnosed. |
