JP-7855844-B2 - Control device and method

JP7855844B2JP 7855844 B2JP7855844 B2JP 7855844B2JP-7855844-B2

Inventors

山内大輔
藤田佳広
阿波哲也
伊藤政利
上柳雄治

Assignees

東洋紡株式会社

Dates

Publication Date: 20260511
Application Date: 20211026

Claims (16)

In a control device for a display device of production equipment, The control device is A processor that displays an image on the aforementioned display device, The system comprises a memory that stores a program executable by the aforementioned processor, The aforementioned processor, The drive parameters related to the drive of the aforementioned production equipment are obtained after the start of production. A transition image showing the changes in the aforementioned drive parameters is displayed on the display device within a set display range. At the time when production using the aforementioned production equipment begins, it is determined that the state of the aforementioned production equipment is unstable. It was determined that the state had shifted from the unstable state to a stable state. When the production equipment is in the unstable state, the display range is set to the first display range. Based on the drive parameters during the first period when the production equipment is in the stable state, a second display range is set. The first display range is either a predetermined range or a range that can be adjusted by the user. The second display range has a larger magnification than the first display range. The processor is a control device that, after setting the second display range, maintains the second display range until the termination condition of the production equipment is met .
The control device according to claim 1, wherein the processor switches the transition image from the first display range to the second display range and displays it when the production equipment switches from the unstable state to the stable state.
The control device according to claim 1 or 2, wherein the processor displays the transition image in the first display range and the transition image in the second display range when the production equipment switches from the unstable state to the stable state.
The control device according to any one of claims 1 to 3, wherein the processor displays the transition image on the display device in different ways depending on whether the production equipment is in the unstable state or the stable state.
The aforementioned processor, When the production equipment is in the unstable state, the images of the upper limit and lower limit of the first display range are displayed. The control device according to any one of claims 1 to 4, which, when the production equipment is in the stable state, displays images of the upper limit and lower limit of a second display range that is narrower than the first display range.
The aforementioned processor, When the aforementioned drive parameter deviates from the alarm range, the alarm device will trigger an alarm. When the production equipment is in the unstable state, the alarm range is set to the first alarm range. The control device according to any one of claims 1 to 5, wherein when the production equipment is in the stable state, the alarm range is set to a second alarm range that is narrower than the first alarm range.
The aforementioned processor, When the aforementioned drive parameter deviates from the alarm range, the alarm device will trigger an alarm. The control device according to claim 6, wherein a second alarm range for a stable state is set based on the drive parameters for a second period when the production equipment is in a stable state.
The aforementioned processor, When the production equipment is in the unstable state, the display device displays an image indicating the first alarm range. The control device according to claim 6 or 7, wherein when the production equipment is in the stable state, an image indicating the second alarm range is displayed on the display device.
In a control device for an alarm system of production equipment, The control device is A processor that controls the alarm device, The system comprises a memory that stores a program executable by the aforementioned processor, The aforementioned processor, The drive parameters related to the drive of the aforementioned production equipment are obtained after the start of production. When the aforementioned drive parameter deviates from the alarm range, the alarm device is instructed to issue an alarm. At the time when production using the aforementioned production equipment begins, it is determined that the state of the aforementioned production equipment is unstable. It was determined that the state had shifted from the unstable state to a stable state. When the production equipment is in the unstable state, the alarm range is set to the first alarm range. Based on the drive parameters during the second period when the production equipment is in the stable state, a second alarm range is set. The first alarm range is either a predetermined range or a range adjustable by the user. The second alarm range is narrower than the first alarm range. The processor is a control device that, after setting the second alarm range, maintains the second alarm range until the termination condition of the production equipment is met .
The aforementioned production equipment is production equipment for producing an object, The control device according to claim 9 , wherein the processor changes the upper and lower limits of the second alarm range according to the type of object.
The control device according to claim 9 or claim 10 , wherein the processor causes the alarm device to execute the alarm in different ways depending on whether the production equipment is in the unstable state or in the stable state.
The control device according to any one of claims 1 to 11 , wherein the processor determines that the production equipment is in a stable state based on the acquired drive parameters.
The control device is The measurement value is obtained from a sensor that measures the measurement value of the aforementioned production equipment. The production equipment is controlled based on the manipulated variable calculated from the set value and the measured value. The control device according to any one of claims 1 to 12, wherein the drive parameter includes at least one of the measured value, the rate of change of the measured value, the amount of change of the measured value, the manipulated variable, the rate of change of the manipulated variable, the amount of change of the manipulated variable, the deviation between the set value and the measured value, the rate of change of the deviation, and the amount of change of the deviation .
The control device according to any one of claims 1 to 13 , wherein the production equipment produces multiple objects of different types.
A method for displaying production equipment, To obtain drive parameters related to the operation of the aforementioned production equipment after the start of production, The transition image showing the changes in the aforementioned drive parameters is displayed on the display device within a set display range, At the time when production using the aforementioned production equipment begins, it is determined that the state of the aforementioned production equipment is unstable. It is determined that the state has shifted from the unstable state to a stable state, When the production equipment is in the unstable state, the display range is set to the first display range, The system includes setting a second display range based on the drive parameters during the first period when the production equipment is in the stable state, The first display range is either a predetermined range or a range that can be adjusted by the user. The second display range has a larger magnification than the first display range. The method further comprises setting the second display range and then maintaining the second display range until the termination condition of the production equipment is met .
A method for an alarm system for production equipment, To obtain drive parameters related to the operation of the aforementioned production equipment after the start of production, When the aforementioned drive parameter deviates from the alarm range, the alarm device will trigger an alarm. At the time when production using the aforementioned production equipment begins, it is determined that the state of the aforementioned production equipment is unstable. It is determined that the state has shifted from the unstable state to a stable state, When the aforementioned production equipment is in an unstable state, the alarm range is set to the first alarm range, The system includes setting a second alarm range based on the drive parameters during a second period when the production equipment is in the stable state, The first alarm range is either a predetermined range or a range adjustable by the user. The second alarm range is narrower than the first alarm range. The method further comprises setting the second alarm range and then maintaining the second alarm range until the termination condition of the production equipment is met .

Description

This disclosure relates to control devices and methods. Patent Document 1 discloses production equipment for producing a predetermined product. Patent Document 1 also discloses the detection of voltage across the signal path of the production equipment and the display of a trend graph of the voltage across the path. By monitoring this trend graph, the user can recognize abnormalities in the voltage across the path. Furthermore, Patent Document 1 describes the execution of an alarm when the voltage across the path deviates from a predetermined threshold range. Japanese Patent Publication No. 2014-59802 This is a diagram illustrating an example of a production system configuration.This is a diagram illustrating an example of the production equipment of this embodiment.This diagram shows the types of sensors, etc.This diagram shows the hardware configuration of the control unit.This is a diagram illustrating the variables used in this embodiment.This is a functional block diagram of the control unit.This diagram shows the first alarm range and the second alarm range.This diagram illustrates an example of a correspondence table that associates objects with their allowable widths.This is a diagram illustrating an example of how to display a trend graph.This is a flowchart of the control device's processing.This is a flowchart of the control device's processing.This is a flowchart of the control device's processing.This is a flowchart of the control device's processing.This figure shows an example of an alarm pattern.This is a diagram illustrating another example of how to display a trend graph.This is a diagram illustrating another example of how to display a trend graph. The embodiments of this disclosure will be described in detail below with reference to the drawings. Parts identical or corresponding to those shown in the drawings are denoted by the same reference numerals, and their descriptions will not be repeated. <First Embodiment> [Production System Configuration] Figure 1 shows an example configuration of a production system 1000. In the example in Figure 1, the production system 1000 includes production equipment 1 and a control system 500. The control system 500 includes a control device 100, an input device 200, a display device 300, and an alarm device 400. In this embodiment, an example of the control system 500 being applied to production equipment 1 is described, but it may also be applied to other equipment. Other equipment includes, for example, air conditioning equipment. Production equipment 1 produces the target object when the start condition is met. Production equipment 1 also stops producing the target object when the end condition is met. The start condition is met, for example, when a user performs a start operation (operating the start button). The end condition is met, for example, when a user performs a end operation (operating the end button). Production equipment 1 typically produces the target object under the same conditions for a fixed period of time. Production equipment 1 produces the target object under the same conditions or with the same quality specifications. The fixed period may be, for example, several hours. The fixed period may be two hours or more, six hours or more, ten hours or more, or one day or more. Furthermore, the upper limit of the fixed period may be two weeks, one month, or three months. If the production time is shorter than the above fixed period, the advantages of continuous production may be small. Also, if the production time exceeds the above upper limit, the advantages may be smaller compared to the case where the user sets the display range and alarm range each time, as described later. The production of the subject matter includes, for example, continuous polymerization of resins, compound manufacturing, molding of resin products, stretched films, spinning of synthetic or chemical fibers, and coating of long materials such as films. Resin polymerization includes the polymerization of condensation resins such as polyester, polyamide, and polycarbonate, and polymerization of double-bonded monomers such as olefins and acrylics. When resin polymerization is performed, for example, raw material monomers or catalysts are introduced into a production facility 1 having multiple interconnected reaction vessels. Then, heating, cooling, and stirring are performed as needed, and the resulting resin is discharged from the production facility 1. In resin compounding, the mixed resin is fed into a kneader or similar device included in production equipment 1. Heating is then performed as needed, and the resin composition is discharged from production equipment 1. The mixture includes, for example, pigments, fillers, various stabilizers, and chain extenders. The molding of resin products includes extrusion molding and injection molding. In extrusion molding, the raw material resin is fed into an extruder included in production equipment 1. After melting and mixin