Generic cell controlling method and apparatus for computer integrated manufacturing system

• US 5,469,361 A
• Filed: 06/06/1994
• Issued: 11/21/1995
• Est. Priority Date: 08/08/1991
• Status: Expired due to Term

• Current Assignee: Board of Regents of the University of Michigan (University of Michigan)
• Original Assignee: Board of Regents of the University of Michigan (University of Michigan)
• Inventors: Moyne, James R.
• Primary Examiner(s): Gordon, Paul P.
• Application Number:
  US08/254,483
• Time in Patent Office: 533 Days
• Field of Search: 364/188, 364/191, 364/192, 364/468, 364/474.11, 364/478
• US Class Current: 700/95
• CPC Class Codes: G05B 19/41835 characterised by programme execution
• CPC Class Codes: G05B 19/41845 characterised by system universality, reconfigurability, modularity
• CPC Class Codes: G05B 2219/31069 Cell controller, setup machine of cell during operation of other machines
• CPC Class Codes: G05B 2219/34345 Database for sequential control of several machines by messages
• CPC Class Codes: G05B 2219/36231 Translate, convert machine independent to machine dependent program
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A generic cell controlling method and apparatus for a computer integrated manufacturing system accepts manufacturing operation commands to perform a selected manufacturing operation on a selected manufacturing tool. The sequence of generic steps to be performed by the manufacturing tool is determined, in order to implement the selected manufacturing operation. Each step is used to generate operational instructions for the tool controller. The sequence of generic steps is preferably produced using a database which has an entry for each manufacturing operation. Each entry includes parameters which are specific for each tool, and an indication of sequence of steps to be performed. When a manufacturing operation command is received, the command is matched to a database entry and the parameters and sequences associated with that entry are used to call a series of routines or modules. Associated parameters are provided to each routine for generating the operational instructions for the particular tool. The routines or modules which are called by the database are independent of one another. Accordingly, a particular routine can be easily updated or a new routine can be easily added. New interfaces to new tools may be provided by generating one or more routines and providing new data in the existing database structure. A learning mechanism may be provided to allow the generic cell controller to be taught how to handle new instructions while in operation.

Claims

1. Apparatus for controlling manufacturing operations by a plurality of manufacturing tools, each of said manufacturing tools having a tool controller associated therewith, said apparatus comprising:

manufacturing operation command accepting means, for accepting a command to perform a manufacturing operation on one of said manufacturing tools;

sequential step determining means, responsive to an accepted command, for determining a sequence of steps to implement the manufacturing operation;

a plurality of operational instruction generating means, a respective one of which is responsive to a respective step in the sequence of steps, for generating operational instructions for the tool controller associated with the one manufacturing tool, to implement the respective step; and

means for providing the operational instructions, generated by the plurality of generating means, to the tool controller of the one manufacturing tool, such that the tool controller controls the one manufacturing tool to perform the manufacturing operation;

wherein said sequential step determining means comprises;

a database, having a plurality of entries for each of a corresponding plurality of manufacturing operations, each entry including parameters for the associated manufacturing operation and an indication of a sequence of steps for the associated manufacturing operation;

means for matching an accepted command to a corresponding database entry and for providing an indication that an accepted command does not match any entry in said database;

means for sequentially activating predetermined ones of said operational instruction generating means, in a sequence determined by the corresponding database entry, and for providing the associated parameters from the corresponding database entry to the activated operational instruction generating means; and

means, responsive to said indication that an accepted command does not match any entry in said database, for effecting creation of a new database entry for the accepted command which does not match any entry in said database, said effecting means comprising;

means for receiving plurality of instructions corresponding to a plurality of manufacturing operations, each instruction including parameters for the associated manufacturing operation and an indication of a sequence of steps for the associated manufacturing operation; and

means responsive to receipt of said plurality of instructions corresponding to a plurality of manufacturing operations, for storing the received instructions as entries in said database.

2. The apparatus of claim 1 wherein said command accepting means comprises means for accepting manufacturing operation commands in a predetermined communication protocol, and for stripping the predetermined communication protocol from said commands.

3. The apparatus of claim 2 wherein said command accepting means further comprises means for extracting data from the commands which are stripped of said predetermined communication protocol.

4. The apparatus of claim 1 wherein said database comprises a relational database, having entity relationship models for associating parameters and sequences of steps with each manufacturing operation.

5. The apparatus of claim 1 wherein said plurality of operational instruction generating means operate independent of one another.

6. The apparatus of claim 1 wherein said sequential step determining means is further responsive to expiration of a preset time period, for determining the sequence of steps.

7. Apparatus for controlling manufacturing operations by a plurality of manufacturing tools, each of said manufacturing tools having a tool controller associated therewith, said apparatus comprising:

means for accepting tool independent coordinating instructions for controlling manufacturing operations;

generic controlling means, responsive to said tool independent coordinating instructions, for generating tool independent operational instructions for controlling at least one of said manufacturing tools; and

at least one generic-to-tool translator associated with a respective at least one of said manufacturing tools, and responsive to said tool independent operational instructions, for generating tool dependent operational instructions and for providing said tool dependent operational instructions to the tool controller associated with the at least one manufacturing tool, to thereby cause said tool controller to control said tool and perform manufacturing operations;

wherein said generic controlling means comprises;

a database, having a plurality of entries for each of a corresponding plurality of tool independent coordinating instructions, each entry including parameters for the associated operational instruction and an indication of a sequence of steps for the associated operational instruction;

a plurality of timers, each of which corresponds to one of said plurality of entries for each of a corresponding plurality of tool independent coordinating instructions;

means for matching an accepted instruction to a corresponding database entry;

means for detecting expiration of one of said plurality of timers; and

means, responsive to said detecting means, for matching an expired one of said plurality of timers to a corresponding database entry, such that said generic controlling means generates tool independent operational instructions upon receipt of a tool independent coordinating instruction and upon expiration of a timer.

8. The apparatus of claim 7 wherein said instruction accepting means comprises means for accepting tool independent coordinating instructions in a predetermined communication protocol and for stripping the predetermined communication protocol from said instructions.

9. The apparatus of claim 8 wherein said instruction accepting means further comprises means for extracting data from the instructions which are stripped of said predetermined communication protocol.

10. The apparatus of claim 7 wherein said at least one generic-to-tool translator comprises a corresponding at least one tool dependent operation instruction generating means, for generating tool dependent operational instructions;

said generic controlling means further comprising means for sequentially activating predetermined ones of said tool dependent operational instruction generating means, in a sequence determined by the corresponding database entry, and for providing the associated parameters from the corresponding database entry to the activated tool dependent operational instruction generating means.

11. The apparatus of claim 7 wherein said database comprises a relational database, having entity relationship models for associating parameters and sequences of steps with tool independent coordinating instruction.

12. The apparatus of claim 7 wherein said generic-to-tool translators operate independent of one another.

13. The apparatus of claim 7 wherein said matching means further comprises means for providing an indication that an accepted instruction does not match any entry in said database.

14. The apparatus of claim 13 further comprising means, responsive to said indication, for effecting creation of a new database entry for the accepted instruction which does not match any entry in said database.

15. A computer integrated manufacturing system comprising:

a factory controller;

a plurality of manufacturing tool controllers;

a like plurality of manufacturing tools, a respective one of which is responsive to a respective one of said manufacturing tool controllers, for performing manufacturing operations; and

a plurality of generic cell controllers, hierarchically connected between said factory controller and said plurality of manufacturing tool controllers, each of said generic cell controllers comprising;

means for accepting manufacturing commands;

means, responsive to an accepted manufacturing command, for determining a sequence of steps to implement an accepted manufacturing command;

a plurality of manufacturing instruction generating means, a respective one of which is responsive to a respective step in the sequence of steps, for generating manufacturing instructions for implementing the respective step; and

means for accepting the manufacturing instructions generated by the plurality of manufacturing instruction generating means;

wherein said sequential step determining means comprises;

a database, having a plurality of entries for each of a corresponding plurality of manufacturing command, each entry including parameters for the associated manufacturing command and an indication of a sequence of steps for the associated manufacturing command;

means for matching an accepted command to a corresponding database entry; and

means for sequentially activating predetermined ones of said manufacturing instruction generating means, in a sequence determined by the corresponding database entry, and for providing the associated parameters from the corresponding database entry to the activated manufacturing instruction generating means;

at least one of said manufacturing instruction generating means including means for modifying at least one of said plurality of entries in said database, such that modified manufacturing instructions, having at least one of a modified sequence and modified parameters from that which was originally stored in said database, are generated by said plurality of generic cell controllers in response to an accepted manufacturing command.

16. The system of claim 15 wherein said command accepting means comprises means for accepting manufacturing operation commands in a predetermined communication protocol, and for stripping the predetermined communication protocol from said commands.

17. The system of claim 16 wherein said command accepting means further comprises means for extracting data from the commands which are stripped of said predetermined communication protocol.

18. The system of claim 15 wherein said database comprises a relational database, having entity relationship models for associating parameters and sequences of steps with each manufacturing command.

19. The system of claim 15 wherein said manufacturing instruction generating means operate independent of one another.

20. The system of claim 15 wherein said matching means further comprises means for providing an indication that an accepted command does not match any entry in said database.

21. The system of claim 20 further comprising means, responsive to said indication, for effecting creation of a new database entry for the accepted command which does not match any entry in said database.

22. The system of claim 15 wherein said sequential step determining means is also responsive to expiration of a preset time period, for determining the sequence of steps.

23. A method for controlling manufacturing operations by a plurality of manufacturing tools, each of said manufacturing tools having a tool controller associated therewith, said method comprising the steps of:

accepting a command to perform a manufacturing operation on one of said manufacturing tools;

determining a sequence of steps to implement the manufacturing operation;

generating operational instructions for the tool controller associated with the one manufacturing tool, for each respective step in the sequence; and

providing the generated operational instructions to the tool controller of the one manufacturing tool, such that the tool controller controls the one manufacturing tool to perform the manufacturing operation;

wherein said determining step comprises the step of;

matching an accepted command to an entry in a database, having a plurality of entries for each of a corresponding plurality of manufacturing operations, each entry including parameters for the associated manufacturing operation and an indication of a sequence of steps for the associated manufacturing operation;

wherein said generating step comprises the step of generating the operational instructions, in a sequence determined by the corresponding database entry, using the associated parameters from the corresponding database entry; and

wherein said matching step further comprises the step of providing an indication that an accepted command does not match any entry in said database;

said method further comprising the step of effecting creation of a new database entry for the accepted command which does not match any entry in said database in response to an indication that an accepted command does not match any entry in said database, wherein said effecting step comprises the steps of;

receiving a plurality of instructions corresponding to a plurality of manufacturing operations, each instruction including parameters for the associated manufacturing operation and an indication of a sequence of steps for the associated manufacturing operation; and

storing the received instructions corresponding to a plurality of manufacturing operations as entries in said database.

24. The method of claim 23 wherein said command accepting step comprises the step of accepting manufacturing operation commands in a predetermined communication protocol, and stripping the predetermined communication protocol from said commands.

25. The method of claim 24 wherein said command accepting step further comprises the step of extracting data from the commands which are stripped of said predetermined communication protocol.

26. A method for controlling manufacturing operations by a plurality of manufacturing tools, each of said manufacturing tools having a tool controller associated therewith, said method comprising the steps of:

accepting tool independent coordinating instructions for controlling manufacturing operations;

generating tool independent operational instructions for controlling at least one of said manufacturing tools, in response to said tool independent coordinating instructions;

translating the tool independent operational instructions into tool dependent operational instructions; and

providing the tool dependent operational instructions to the tool controller associated with the at least one manufacturing tool, to thereby cause said tool controller to control said tool and perform manufacturing operations;

wherein said generating step comprises the step of;

matching an accepted coordinating instruction to an entry in a database, having a plurality of entries for each of a corresponding plurality of tool independent coordinating instructions, each entry including parameters for the associated operational instruction and an indication of a sequence of steps for the associated operational instruction;

providing a plurality of timers, each of which corresponds to one of said plurality of entries for each of a corresponding plurality of tool independent coordinating instructions;

detecting expiration of one of said plurality of timers; and

matching an expired one of said plurality of timers to a corresponding database entry, such that tool independent operational instructions are generated upon receipt of a coordinating instruction and expiration of a timer.

27. The method of claim 26 wherein said instruction accepting step comprises the step of accepting tool independent coordinating instructions in a predetermined communication protocol and stripping the predetermined communication protocol from said instructions.

28. The method of claim 27 wherein said instruction accepting step further comprises the step of extracting data from the instructions which are stripped of said predetermined communication protocol.

29. The method of claim 26 wherein said translating step comprises the step of:

sequentially generating said tool dependent operational instructions, in a sequence determined by the corresponding database entry, using the associated parameters from the corresponding database entry.

30. The method of claim 26 wherein said matching step further comprises the step of providing an indication that an accepted instruction does not match any entry in said database.

31. The method of claim 30 further comprising the step of effecting creation of a new database entry for the accepted instruction which does not match any entry in said database.