INPUT/OUTPUT SIGNAL CONTROL SYSTEM.

摘要

A system for controlling the input and output signals in a PMC (programmable machine controller). In addition to an ordinary input/output signal region (23a), a false input/output signal region (23b) is provided to use the signals of the region (23b) as input/output signals when the PMC (20) has stopped the control operation. When the PMC (20) is stopped, a preset false input/output signal (23b) is input or output, so that the whole control operation is safely carried out. Therefore, the PMC (20) can be stopped to debug its sequence program under the condition where the machine is coupled.