| 摘要 |
PURPOSE:To automatically perform a back track process by generating a time series table and a time series table control table, and setting a tag number in time series data and setting the latest corresponding tag number in the time series table control table when a schedule plan is selected. CONSTITUTION:The time series table 25 for controlling the time series data DTR generated accompanying the selection of the schedule plan SDR and the time series table control table 26 for controlling the time series table 25 are generated. When the schedule plan SDR is selected, the tag number TGN corresponding to the selection order of the schedule plan SDR is set in the time series data DTR generated accompanying the schedule plan SDR and the latest corresponding tag number TGN is set in the time series control table 26. Consequently, large memory capacity is not required and the back track process can automatically be performed. |
