| 摘要 |
PURPOSE:To reduce program faults without any operation which requires high- level judgement by storing sequence control information on every sequence step and storing a condition group and current state information. CONSTITUTION:The central processing part 2 of a sequence control part 5a stores, through operation part 4, sequence control information on every sequence step in the step information group means of a storage part 1, the condition group in a condition group storage means, and the condition group and its current state information in a condition processing means. When a sequence program is generated, pieces of current state information on the individual condition group are read out of a part 5 to be controlled individually through an input/ output part 3 on the basis of the stored condition group and stored as start conditions of corresponding steps while pairing with the respective conditions. Consequently, the need for the complicate operation which requires high-level judgement is eliminated to reduce program faults. |
