| 摘要 |
PURPOSE:To execute easily sequence check or automatic stop and to investigate easily the cause of an accident by forming functions stopping a program at an optional address position and executing single step sending. CONSTITUTION:A programmable controller 1 advances sequence addresses successively on the basis of outputs from a U/D counter 2. The address of a stop point is set up on a console 3 and a comparator 4 compares the set address with a real sequence address, and when both the addresses coincide with each other, stops the counting of the U/D counter 2 by its output, so that the advance of the program is stopped. When a single step pushbutton 5 is depressed if necessary after stopping the program, a single step circuti 6 generates pulses in accordance with the number of times of depression and the U/D counter 2 is counted up to execute the single step of the program. |
