TRACKING SYSTEM FOR LOT GROUP IN PROCESS MONITORING

摘要

PURPOSE:To attain a tracking operation for each track even in case the formation of a lot has an optional change by controlling the hierarchical structure of the lot in the form of tree structure data and updating the tree structure data in response to the division or mixture of the lot. CONSTITUTION:A tracking command part 21 extracts the lot operation contents out of a lot operation table 202 and sends the operation contents to a lot operation part 200 if they show the mixture or division of lots. Thus the part 200 is started and decides the operation contents and divides and mixes the transactions in response to the division and mixture indicated by the operation contents. Then the execution start address is read out of a tracking loop for a control program of an assembly line to be executed next in response to the lot operation. Then a processing program is started. The processing program delivers the control output to the process via a process output part 38.