PROGRAMMIERBARE STEUEREINHEIT

摘要

A programmable controller which operates in accordance with instructions of a stored program is capable of prohibiting outputs to selected controlled external apparatuses at any step in a control sequence. Following removal of the output prohibition, the control sequence is subsequently executed from the state present when the output was prohibited. The controller safely stops the sequential operation of controlled external apparatuses, and restarts the operation of the external apparatuses without wasting time.