Use of a curve section in a process control system

A process control system comprising a user terminal having a processor configured to:

• obtain a first curve of a detected physical quantity of a piece of process control equipment in the process control system, said first curve having points with values of the physical quantity at various time instances,
• provide at least one of the points in a section of the first curve as a manipulable point that a user can change,
• receive a selection from the user of the section of the first curve for enabling changing of the section of the first curve, wherein the selection of the section of the first curve is received in a selection of two sections, each being a section of a corresponding curve,
• receive from the user a change of at least one of the manipulable points in said section, thereby changing the section of the first curve, and
• apply the changed section of the first curve as an input to an operation in the process control system, wherein when applying the section of the first curve the processor is configured to apply the two curve sections of the two curves in the process control system.

A method for using a curve in a process control system, the method being performed in a user terminal and comprising:

• obtaining a first curve of a detected physical quantity of a piece of process control equipment in the process control system, said first curve including points with values of the physical quantity at various time instances,
• providing at least one of the points in a section of the first curve as a manipulable point that a user can change,
• receiving a selection from the user of the section of the first curve for enabling changing of the section of the first curve, wherein the selection of the section of the first curve is received in a selection of two sections, each being a section of a corresponding curve,
• receiving from the user a change of at least one of the manipulable points in said section thereby changing the section of the first curve, and
• applying the changed section of the first curve as an input to an operation in the process control system, wherein when applying the section of the first curve the two curve sections of the two curves are applied in the process control system.

A non-transitory computer-readable medium storing a computer program for using a curve in a process control system, the computer program comprising computer program code which when run in a processor, causes a user terminal to:

• obtain a first curve of a detected physical quantity of a piece of process control equipment in the process control system, said first curve including points with values of the physical quantity at various time instances,
• provide at least one of the points in a section of the first curve as a manipulable point that a user can change,
• receive a selection from the user of the section of the first curve for enabling changing of the section of the first curve, wherein the selection of the section of the first curve is received in a selection of two sections, each being a section of a corresponding curve,
• receive from the user a change of at least one of the manipulable points in said section thereby changing the section of the first curve, and
• apply the changed section of the first curve as an input to an operation in the process control system, wherein when applying the section of the first curve the computer program code causes the user terminal to apply the two curve sections of the two curves in the process control system.

A computer program product for using a curve in a process control system, the computer program product comprising a non-transitory data carrier with the computer program code, which when run in a processor, causes a user terminal to:

• obtain a first curve of a detected physical quantity of a piece of process control equipment in the process control system, said first curve including points with values of the physical quantity at various time instances,
• provide at least one of the points in a section of the first curve as a manipulable point that a user can change,
• receive a selection from the user of the section of the first curve for enabling changing of the section of the first curve, wherein the selection of the section of the first curve is received in a selection of two sections, each being a section of a corresponding curve,
• receive from the user a change of at least one of the manipulable points in said section thereby changing the section of the first curve, and
• apply the changed section of the first curve as an input to an operation in the process control system, wherein when applying the section of the first curve the computer program code causes the user terminal to apply the two curve sections of the two curves in the process control system.