Patent ID: 7107295

Claim:
A document management system for control software used in a controller, said document management system comprising: a document storing and managing device for storing and managing documents which describe the control software of the controller; and terminal equipment that has documents describing the control software of the controller, which are stored in the document storing and managing device, and that performs referring work, or editing work, of the documents independently of the document storing and managing device; wherein the documents which describe the control software of the controller are stored in the document storing and managing device and in the terminal equipment, and contents of the document stored in the document storing and managing device are the same as those stored in the terminal equipment; said document is constituted of a plurality of document sheets which can be referred to and edited, said plurality of sheets constituting a drawing; said drawing can be divided into separate volumes, each of which is constituted of one or more sheets; said document is created in a unit of the storage of a computer and a control device for the controller where a control circuit is stored, or on a control operation attribute basis and on an element display attribute basis, said attributes being given to each drawing as a set of separate volumes, separate volumes and document sheets, and being given to each element in the document sheet; and said terminal equipment performs synchronization work of documents on a document basis, for each attribute classification of an element in the document, or in a unit of the storage of a computer and a control device for the controller where the documents are actually stored.