Method for generating a switching sequence in an industrial system, and device

• US 10,534,338 B2
• Filed: 08/20/2015
• Issued: 01/14/2020
• Est. Priority Date: 08/20/2015
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Muller, Andreas, Peschke, Jorn
• Primary Examiner(s): Lin, Jason
• Application Number:
  US15/752,537
• Publication Number:
  US 20190011893A1
• Time in Patent Office: 1,608 Days
• Field of Search: None
• CPC Class Codes: G05B 19/0426 Programming the control sequence
• CPC Class Codes: G05B 19/41865 characterised by job scheduling, process planning, material flow
• CPC Class Codes: G05B 2219/23316 Standby, inactive, sleep or active, operation mode
• CPC Class Codes: G05B 2219/25387 Control sequences so as to optimize energy use by controlled machine
• CPC Class Codes: G05B 2219/32021 Energy management, balance and limit power to tools
• CPC Class Codes: G05B 2219/34306 Power down, energy saving
• CPC Class Codes: Y02P 70/10 Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
• CPC Class Codes: Y02P 80/10 Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

In a method for generating a switching sequence in an industrial plant which includes components for transferring the plant to an energy-saving state, a state model of the plant is used with regard to the components and information about a task-specific action schema with regard to the components. An extended state model is determined by supplementing the state model with the task-specific action schema using circuit-relevant variables. The switching sequence is generated from a start state to a desired target state by calculating proceeding from the target state back to the start state in the extended state model, and the switching sequence is executed.

Claims

1. A method for generating a switching sequence in an industrial plant which includes components for transferring the plant to an energy-saving state, said method comprising:

using a state model of the plant with regard to the components and information about a task-specific action schema in form of application-case-based sets of rules composed of model-dependent precondition-effect-descriptions with regard to the components;

determining an extended state model by supplementing the state model with the task-specific action schema using switching-relevant variables;

back-calculating in the extended state model from a desired target state of the plant to a start state based on the application-case-based sets of rules;

generating the switching sequence from a start state to the desired target state based on the back-calculation; and

executing the generated switching sequence.

2. The method of claim 1, wherein the state model of the plant takes into account a unit comprised of at least one of the components, with a task-specific action schemata existing at a level of the unit.

3. The method of claim 2, wherein knowledge of a state of the least one component of the unit is sufficient for determination of a state of the unit.

4. The method of claim 1, wherein only a relationship that is actually present in the plant is observed for determination of the extended state model.

5. The method of claim 1, further comprising regenerating the switching sequence when the state model is changed.

6. The method of claim 1, further comprising regenerating the switching sequence when the task-specific action schema is changed.

7. The method of claim 1, further comprising simulating a behavior of the plant with the aid of the generated switching sequence.

8. The method of claim 1, further comprising supplying a fault analysis to a user when a switching fault occurs on a switching path.

9. The method of claim 1, further comprising taking further aspects into account in the extended state model, said further aspects not being required for the execution of a task.

10. An apparatus for generating a switching sequence in an industrial plant which includes components for transferring the plant to an energy-saving state, said apparatus being configured to:

use a state model of the plant with regard to the components and information about a task-specific action schema in form of application-case-based sets of rules composed of model-dependent precondition-effect-descriptions with regard to the components;

determine an extended state model by supplementing the state model with the task-specific action schema using switching-relevant variables;

back-calculate in the extended state model from a desired target state of the plant to a start state based on the application-case-based sets of rules;

generate the switching sequence from a start state to the desired target state based on the back-calculation; and

execute the generated switching sequence.