METHODS AND APPARATUS TO GENERATE SCHEDULES TO EXECUTE FUNCTIONS IN A PROCESS CONTROL SYSTEM
First Claim
1. An apparatus to generate a schedule to execute functions in a process control system, the apparatus comprising:
- a first interface configured to identify a first function associated with a process control routine;
a sub-schedule generator configured to generate a first sub-schedule associated with a first time period, wherein the first sub-schedule indicates a first execution time at which the first function is to be executed; and
a schedule generator configured to form a schedule associated with a second time period based on two instances of the first sub-schedule, wherein the schedule indicates the first execution time and a second execution time at which the first function is to be executed.
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Abstract
Example methods and apparatus to generate schedules to execute functions in a process control system are disclosed. A disclosed example apparatus includes a first interface configured to identify a first function associated with a process control routine. The example apparatus also includes a sub-schedule generator configured to generate a first sub-schedule associated with a first time period. The first sub-schedule indicates a first execution time at which the first function is to be executed. The example apparatus also includes a schedule generator configured to form a schedule associated with a second time period based on two instances of the first sub-schedule. The schedule indicates the first execution time and a second execution time at which the first function is to be executed.
28 Citations
20 Claims
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1. An apparatus to generate a schedule to execute functions in a process control system, the apparatus comprising:
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a first interface configured to identify a first function associated with a process control routine; a sub-schedule generator configured to generate a first sub-schedule associated with a first time period, wherein the first sub-schedule indicates a first execution time at which the first function is to be executed; and a schedule generator configured to form a schedule associated with a second time period based on two instances of the first sub-schedule, wherein the schedule indicates the first execution time and a second execution time at which the first function is to be executed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A machine accessible medium having instructions stored thereon that, when executed, cause a machine to:
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generate a first quantity of start time offsets indicating a quantity of executions of a first function during a first sub-schedule associated with a first time period; generate a second quantity of start time offsets indicating a quantity of executions of a second function during the first sub-schedule, wherein the first quantity of start time offsets is different from the second quantity of start time offsets; and generate a schedule associated with a second time period based on two instances of the first sub-schedule. - View Dependent Claims (10, 11, 12, 13)
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14. A method to generate a schedule to execute functions in a process control system, the method comprising:
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generating a first quantity of start time offsets indicating a quantity of executions of a first function during a first sub-schedule associated with a first time period; generating a second quantity of start time offsets indicating a quantity of executions of a second function during the first sub-schedule, wherein the first quantity of start time offsets is different from the second quantity of start time offsets; and generating a schedule associated with a second time period based on two instances of the first sub-schedule. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification