an error correction and folgesteuerung includes procedures for

摘要

A sequence controller (1A) with error correction and a sequence controlling method are disclosed. The sequence controller (1A) is provided with a stop-time operation execution table (35), which stores stop-time execution step numbers (E2) and resumption-time execution step numbers (E3). These step numbers (E2, E3) correspond to step numbers (E1) at which a stop is expected to occur in a sequence control program (SFC) for sequence-controlling a controlled object (2). According to the sequence controlling method, the execution of the sequence control program (SFC) is stopped at the occurrence of an error, the stop-time execution step number (E2) corresponding to the stop-time step number (E1) is read from the stop-time operation execution table (35), a step having the step number read is executed, the resumption-time execution step number (E3) is read, and the execution is resumed from that step. As a result, an error processing can be performed by only specifying a step number, the error processing need not be described in the program, and programs can be written, revised and reviewed easily. IMAGE