PURPOSE: To make it unnecessary to rewrite a centralized control table even if a load address is changed, by retrieving a backup program with a program name.
CONSTITUTION: If abnormality is detected during the processing of a program A 1, the last END instruction of the program A 1 is executed by the exception processing. At this time, a retrieval execution system reads in the program name as a part of the END instruction and starts executing a following non- operation instruction 2. The system reads in the first BEGIN instruction of a program following the instruction 2 and collates the program name as a part of this BEGIN instruction with the program name read in by the END instruction of the program where abnormality is detected. The program name is used as the key to retrieve programs successively, and a backup program A' 4 is executed immediately when it is found.
MORI KINJI
ORIMO MASAYUKI
