PROGRAMMABLE CONTROLLER

摘要

PURPOSE:To quickly and accurately grasp the working state of a sequence program by displaying the arithmetic result obtained immediately after execution of an instruction word together with this instruction word with the sequence program. CONSTITUTION:In a working programmable control state, an operating part 2 sends a command to a control part 1 for display of a sequence program instruction word. The part 1 produces a copy of an instruction word 4 of a step number (003) to be displayed within a memory part 4 and then writes a CALL instruction at the head of the word 4. Then the part 1 carries out successively a sequence program 9 and then the word 4 at the designated step number (003) to display the arithmetic result at a display part 3 together with the word 4. Then, the part 1 carries out again the program 9 at and after an instruction word 5.