JP7438164B2 - Production management system and production management program - Google Patents

Description

The present invention relates to a production management system that manages the production status of production lines that produce, for example, meat, fish, processed foods, pharmaceuticals, and the like.

For example, on production lines that produce meat, fish, processed foods, pharmaceuticals, etc., manufactured goods are weighed and packaged to a specified weight, and then inspected for foreign matter and final weight. Products that are determined to be of good quality through inspection are packaged and shipped as final products.

Patent Document 1 describes a production line consisting of a plurality of production line constituent devices such as a weighing machine, a packaging machine, a product inspection machine, or a boxing machine.

In such a production line, if an abnormality occurs in a sensor or the like of each device, the operator of the production line is notified of the abnormality.

Japanese Patent Application Publication No. 2019-147580

However, when multiple production line components are working together, especially when each device is arranged in series, there may be slight deviations in the operation timing of one of the devices or the products being produced. Even if a minor abnormality occurs, such as variations in conveyance, as long as the abnormality is within the allowable range of each device, no errors or alarms will occur from any of the devices, and as time passes, any It is difficult to understand that each device is unable to perform to its intended level and continues to produce in an inefficient state, even when the equipment is in an abnormal state such as an error or alarm.

In other words, a cooperative device that controls its own operation by transmitting and receiving signals to and from other devices in front and behind it relies on the signal transmission and reception with other devices to start its own operation, and especially when it receives a signal input and controls its own operation. The starting cooperation device waits for a signal input unless there is a signal input. Normally, how other equipment in front of and behind the equipment operates in response to error and alarm signals from the own equipment varies depending on the equipment configuration of the production line, so the operation of the own equipment cannot continue unless some sort of action is taken. An abnormal signal is not output until such an abnormal condition occurs.

Therefore, the present invention provides a production line that is capable of detecting a decline in the production efficiency of the production line as a whole before any of the devices becomes abnormal in a production line that is composed of a plurality of devices. The purpose is to provide a management system.

The production management system of the present invention is a production management system that manages a production line including two or more production line configuration devices that operate in cooperation according to a preset standard sequence , and which connects the production line configuration devices and a network. The production line configuration device includes a host computer configured to be able to communicate with each other via a host computer and storing the reference sequence , and the production line configuration device indicates the occurrence of a preset event when the event occurs , and transmits data. event data assigned a unique ID identifying the source is transmitted to the host computer, and the host computer determines that the production efficiency of the production line has decreased based on the received event data and the reference sequence. If it is determined, an alarm is output.

With this configuration, it is determined whether the production efficiency is decreasing based on the event data and standard sequence sent from each production line component device, and an alarm is output. Therefore, it is possible to detect and warn that the production efficiency of the entire production line is decreasing before any of the production line components becomes abnormal.

Further, in the production management system of the present invention, with respect to one production line constituent device that repeats the same process among the production line constituent devices, the host computer is configured to detect the occurrence of the predetermined event in the production line constituent device. After that, if the same phenomenon does not occur even after a predetermined period of time has elapsed, it is determined that the production efficiency of the production line has decreased.

With this configuration, in a production line component device that repeats the same process, if the process is not performed even after a predetermined period of time has elapsed, it is determined that the production efficiency has decreased. Therefore, it is possible to detect and warn that the production efficiency of the entire production line is decreasing before any of the production line components becomes abnormal.

Further, in the production management system of the present invention, with respect to two adjacent production line constituent devices on the production line among the production line constituent devices, the host computer controls the production line configuration of one of the production line constituent devices. The production efficiency of the production line is determined when the predetermined event does not occur from the other production line component device even after a predetermined period of time has elapsed in response to a notification of the predetermined event from the device . It is determined that the value has decreased.

With this configuration, if there is no response to a request signal from an adjacent production line component device even after a predetermined period of time has elapsed, it is determined that the production efficiency has decreased. Therefore, it is possible to detect and warn that the production efficiency of the production line as a whole is decreasing before any of the production line constituent devices becomes abnormal.

Further, in the production management system of the present invention, the event includes completion of processing on a product in at least one of the production line constituent devices.

With this configuration, if no processing is performed even after a predetermined period of time has passed after the processing of the product in the production line component device is completed, it is determined that the production efficiency has decreased. Therefore, it is possible to detect and warn that the production efficiency of the entire production line is decreasing before any of the production line components becomes abnormal.

Further, the production management program of the present invention is configured to be able to communicate with a production line including two or more production line configuration devices that operate in cooperation according to a preset standard sequence , and with the production line configuration devices via a network . and a host computer storing the reference sequence , and the production line configuration device indicates that a preset event has occurred when the event occurs , and identifies the data transmission source. A production management program for a production management system that transmits event data to which a unique ID is assigned to the host computer, the production management program for the production management system transmitting event data assigned a unique ID to the host computer, the program controlling the production line based on the received event data and the reference sequence. This is to realize a function that outputs an alarm when it is determined that production efficiency has decreased.

With this configuration, it is determined whether the production efficiency is decreasing based on the event data and standard sequence sent from each production line component device, and an alarm is output. Therefore, it is possible to detect and warn that the production efficiency of the entire production line is decreasing before any of the production line components becomes abnormal.

The present invention provides a production management system that is capable of detecting a decline in the production efficiency of a production line as a whole, before any of the devices becomes abnormal in a production line composed of a plurality of devices. can be provided.

FIG. 1 is a schematic configuration diagram of a production management system according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of transmission data from each production line component device of the production management system according to an embodiment of the present invention. FIG. 3 is a sequence diagram illustrating an example in which data transmitted from each production line component device of the production management system according to an embodiment of the present invention is delayed compared to a normal state. FIG. 4 is a sequence diagram illustrating an example in which data transmitted from each production line component device of the production management system according to an embodiment of the present invention is different between adjacent devices. FIG. 5 is a diagram showing an example of a graph of operation results of the production management system according to an embodiment of the present invention.

Hereinafter, a production management system according to an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a production management system 1 according to an embodiment of the present invention receives raw materials for foods, drinks, etc. that have been manufactured and processed in upstream manufacturing processes, and consolidates them into predetermined weights in a weighing process and packaging process. In the inspection process, the product is inspected for weight, foreign matter, packaging condition, etc., and in the packaging process, the product is boxed if the inspection results are found to be good.

The production line includes a supply device 11, a weighing device 12, a packaging device 13, an inspection device 14, and a caser 15, each of which performs a different process. Each of these devices (11, 12, 13, 14, 15) is also called a production line component device, and each device (11, 12, 13, 14, 15) is usually arranged in a series and lined up, and the production line A conveying means such as a belt conveyor is arranged between the preceding and succeeding processes and between the devices of each process.

Note that this is not limited to the case where the respective devices (11 to 15) are arranged adjacent to each other as shown in FIG. The inspection device 14 and the caser 15 may be arranged adjacent to a product area where packaged products are handled, and the two separated areas may be connected by a conveying means such as a belt conveyor or a chute.

The supply device 11 receives raw materials manufactured in the upstream manufacturing process, and supplies them in predetermined amounts to the measuring device 12.

The weighing device 12 collects or combines the raw materials supplied from the supply device 11 so as to have a predetermined weight, and discharges the raw materials to the packaging device 13 .

The measuring device 12 temporarily stores the raw material received from the supply device 11 in a storage container, distributes it in a predetermined amount into a plurality of measuring containers, and calculates a combination of the measured values obtained in each measuring container to obtain a predetermined value. may have a combination metering means for discharging raw materials in the weight range of .

The packaging device 13 wraps the raw material of a predetermined weight discharged from the measuring device 12 with a packaging material and discharges it to the inspection device 14 .

The inspection device 14 inspects the weight of the packaged product discharged from the packaging device 13, the presence of foreign matter, etc., and discharges the packaged product, which has no abnormalities and is determined to be a good product in the inspection, to a caser 15.

The caser 15 boxes the packaged product discharged from the inspection device 14, seals it, and discharges it to a downstream process.

The host computer 16 is configured by a computer unit including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a hard disk drive, and an input/output port (not shown).

The supply device 11 , the weighing device 12 , the packaging device 13 , the inspection device 14 , the caser 15 , and the host computer 16 are connected to a network 17 . The supply device 11, the weighing device 12, the packaging device 13, the inspection device 14, the caser 15, and the host computer 16 can communicate with each other via a network 17.

In the host computer 16, the arrangement of each device on the production line is set in advance, and information regarding other devices placed before and after one device is stored in association with, for example, an ID unique to the device.

In the example shown in FIG. 1, a feeding device 11 is placed in the feeding process, a weighing device 12 is placed in the weighing process, a packaging device 13 is placed in the packaging process, an inspection device 14 is placed in the inspection process, and a caser 15 is placed in the packaging process in this order. This is stored in the host computer 16.

Note that if there are multiple devices in any process and each can communicate with the host computer 16, it is possible to set whether each device is arranged in series or in parallel. It is good if it is.

The host computer 16 receives inspection information (event data) such as inspection results and operation history transmitted from each device on the production line via the network 17, stores it in a hard disk drive, and manages it.

The operation history of the equipment here is not limited to the start and stop of operation of each equipment, but also includes, for example, detection of excess or deficiency in the amount of raw materials supplied from the upstream process in the supply device 11, detection of opening of covers accompanied by operation stop, supply This includes detection of the passage of raw materials discharged by the device, detection of the amount of stored raw materials supplied in the weighing device 12, zero-setting processing of the weighing means (not shown), etc., and detection of the heat seal part of the packaging device 13. This includes waiting for the temperature to stabilize, replacing the sheet roll of packaging material, etc., detecting the arrival of the article in the inspection device 14, outputting the inspection results, resetting the inspection means (not shown), waiting period for stability, and running out of the packaging material in the caser 15. The data includes operational information specific to each device, such as, and is transmitted to the host computer 16 as event data.

Incidentally, it is preferable that a device-specific ID is assigned to the event data, and the ID is used as identification information for identifying in the data which event data was transmitted from which device.

Furthermore, the host computer 16 may include a reception time information adding means for adding received time information as a timestamp when receiving event data transmitted from each device. As a result, even if the event data of one of the devices does not include time information, the time information at almost the same point in time will be recorded in the host computer 16, which will reduce the functional limitations of the control software on the device side. You can avoid receiving it. Further, even if there is a difference in the time set in each device, the effect is small.

As shown in FIG. 2, the weighing device 12, the packaging device 13, the inspection device 14, and the caser 15 transmit transmission data as event data to a data transmission destination when a predetermined event occurs. In FIG. 2, the "system" to which the data is sent is the one to which the data is sent to the host computer 16.

The weighing device 12 receives a combination request signal (described later) from the subsequent packaging device 13, and sends a supply request signal to the supply device 11 when it is determined that raw materials can be accepted or there is a shortage of accepted raw materials. and transmits to the host computer 16 information on the time at which the supply of raw materials was requested, based on the time at which the supply request signal was transmitted as event data in the weighing device 12.

When the measuring device 12 determines that the supply of raw materials is sufficient, it stops outputting the supply request signal to the supply device 11, and the host computer 16 is informed of the supply of raw materials based on the time when the supply request signal is stopped. Send completed time information.

The weighing device 12 receives and weighs the raw materials supplied from the supply device 11, collects or combines them so as to have a predetermined weight range, and transmits the measured value of the raw materials to be discharged to the host computer 16.

When the discharge of raw materials is completed, the weighing device 12 transmits a discharge signal to the packaging device 13, and transmits information on the time when discharge is completed to the host computer 16.

When the packaging device 13 determines that it is ready for packaging, it transmits a combination request signal to the weighing device 12 requesting raw materials that have been gathered or combined to a predetermined weight, and sends a combination request signal to the host computer 16. Sends the time information when the signal was sent.

The packaging device 13 transmits the packaging result, such as packaging OK (referring to a state in which it was packed normally) or packaging NG (referring to a state in which it was not packed normally), and its time data to the host computer 16. . The packaging results are also transmitted to the inspection device 14 at the subsequent stage.

The inspection device 14 transmits to the host computer 16 the inspection result such as OK or NG as a result of inspecting the product, and the time data when the inspection was completed. The inspection device 14 may include a sorting device (not shown) that removes products that have been inspected NG and products that have received packaging NG from the packaging device 13 from outside the production line. Only the product can be efficiently discharged.

When the inspection device 14 determines to stop supplying the product to the caser 15, which is the downstream device, due to overshooting capacity or abnormality in the downstream device, it sends a stop request signal to the packaging device 13, which is the upstream device, and sends a stop request signal to the packaging device 13, which is the upstream device. Information (reason code) indicating the reason for transmitting the stop request signal and time information for transmitting the stop request signal are transmitted to the computer 16.

The caser 15 boxes a predetermined number of products received from the inspection device 14, and transmits the packing result, such as OK or NG, and information on the time when the packing is completed to the host computer 16. .

When the caser 15 determines that the supply of products should be stopped due to a shortage of packaging materials (for example, cardboard or wrapping sheets), it sends a stop request signal to the inspection device 14, which is the preceding device, and sends a stop request signal to the host computer 16. Information indicating the reason for transmitting the signal (reason code) and time information for transmitting this stop request signal are transmitted.

In this embodiment, the host computer 16 detects that production efficiency is decreasing based on time information of data sent from the weighing device 12, packaging device 13, inspection device 14, and caser 15, and issues an alarm. Output. The alarm output is, for example, output as a message to a display device (not shown) connected to the host computer 16, or output in a form that can be visually or audibly identified on a production status monitor appropriately installed near the production line. Sometimes it happens.

The host computer 16 determines that the production efficiency has decreased if the data transmitted from each device is delayed compared to when it is in a normal state. Note that each device may issue an alarm by itself if an event occurs that is delayed compared to the normal state.

Note that the "normal state" here does not mean that each device on the production line is operating without abnormal conditions, but also that the operating rate of the production line as a whole is maintained at a predetermined standard value or higher. Specifically, it refers to the fact that each device on the production line is working together in a preset standard sequence based on data sent from each device to the host computer 16.

The host computer 16 stores a reference sequence that is set according to the functions of devices constituting the production line and their arrangement on the production line.

The host computer 16 may store a plurality of reference sequences, such as sequences SQ1, SQ2, etc., for each production line or in accordance with the target production efficiency of a certain production line, so that they can be switched.

Furthermore, when one device outputs a signal to another device, the same signal is also output to the host computer 16, but for example, when one device outputs a signal to another device, When outputting a high level signal when the request signal is on and a low level signal when the request signal is off, an analog input port (not shown) may be assigned to the host computer 16, or an analog input port (not shown) may be assigned to the host computer 16. Data signals may also be transmitted via network 17 from other devices.

For example, in the case shown in FIG. 3, the arrow portion indicated by A is in a normal state, and in step S1, the packaging device 13 transmits a combination request signal to the weighing device 12 when packaging is ready.

In step S2, when a supply request signal is transmitted from the weighing device 12 to the feeding device 11 and the raw material is supplied from the feeding device 11 to the weighing device 12, in step S3, the weighing device 12 sends the raw material to a predetermined weight. They are collected or combined in such a manner as to be discharged to the packaging device 13, and a discharge signal is transmitted to the packaging device 13 in step S4.

Note that in step S2, the supply device 11 may operate to supply a predetermined amount at predetermined intervals even if the supply request signal is not transmitted from the metering device 12. In this case, the measuring device 11 outputs a supply stop signal to the supply device 11 to prevent it from receiving more raw materials than necessary from the supply device 11. This prevents raw materials from stagnation or clogging in the measuring device 11.

In step S5, the packaging device 13 transmits a combination request signal to the weighing device 12 when the packaging is completed and the next packaging is ready.

In step S6, when a supply request signal is transmitted from the weighing device 12 to the feeding device 11 and the raw material is supplied from the feeding device 11 to the weighing device 12, in step S7, the weighing device 12 sends the raw material to a predetermined weight. They are collected or combined in such a manner as to be discharged to the packaging device 13, and a discharge signal is transmitted to the packaging device 13 in step S8.

Here, as shown by the arrow B, if the combination request signal from the packaging device 13 in step S9 is delayed even by a small amount, the production efficiency of the entire production line will decrease.

The host computer 16 outputs an alarm if a combination request signal is not transmitted from the packaging device 13 even after a predetermined period of time has elapsed since the discharge signal was transmitted from the weighing device 12. In addition, in the weighing device 12, if a combination request signal is not transmitted from the packaging device 13 even after a predetermined time has elapsed after transmitting the discharge signal, the weighing device 12 may output an alarm by itself.

Thereafter, in step S10, a supply request signal is transmitted from the weighing device 12 to the feeding device 11, and the raw material is supplied from the feeding device 11 to the weighing device 12. In step S11, the weighing device 12 sends the raw material to a predetermined amount. are combined so as to have a weight of , and are discharged to the packaging device 13, and in step S12, a discharge signal is transmitted to the packaging device 13.

In step S13, the packaging device 13 transmits a combination request signal to the weighing device 12 when the packaging is completed and the next packaging is ready. Then, the weighing device 12 transmits a supply request signal to the supply device 11.

Here, as shown by the arrow C, if there is a delay in the supply of raw materials from the supply device 11 in step S14, there will also be a delay in the discharge of the combination of the weighing devices 12 in step S15 and the transmission of the combination discharge signal in step S16. This will spread and reduce production efficiency.

The host computer 16 outputs an alarm if the combination discharge result or discharge signal is not transmitted from the weighing device 12 even after a predetermined period of time has passed since the combination request signal was transmitted from the packaging device 13. In addition, in the packaging device 13, if a discharge signal is not transmitted from the weighing device 12 even after a predetermined period of time has passed after transmitting the combination request signal, the packaging device 13 may output an alarm by itself.

Further, the host computer 16 determines that the production efficiency is decreasing when there is a difference in the order of signal transmission between adjacent devices, such that data transmitted from each device differs from a predetermined sequence.

For example, in the case shown in FIG. 4, the packaging device 13 discharges the packaged product to the inspection device 14 in step S21. In step S22, the inspection device 14 inspects the product, and in step S23, the inspection device 14 discharges the product determined to be non-defective. In step S24, the caser 15 packs the product into a box, seals the product, and discharges the product.

Here, since the inspection device 14 can perform the inspection in a time shorter than the operation interval of the packaging device 13, it does not send a signal requesting discharge of the product to the packaging device 13 in the preceding stage. That is, the packaging device 13 discharges the packaged products to the inspection device 14 without receiving a signal from the inspection device 14 at the subsequent stage, and similarly, the inspection device 14 discharges the packaged products to the inspection device 14 without receiving a signal from the caser 15. The product determined as such is discharged into the caser 15.

Subsequently, in step S25, the packaging device 13 discharges the packaged product to the inspection device 14. In step S26, the inspection device 14 inspects the product, and in step S27, the inspection device 14 discharges the product determined to be non-defective. In step S28, the caser 15 packs the product into a box, seals the product, and discharges the product.

Here, in step S29, after the packaging device 13 discharges the packaged product to the inspection device 14, the product discharge from the packaging device 13 and the inspection results by the inspection device 14 are transmitted between the arrows indicated by D. If not, production efficiency will decrease.

If the host computer 16 does not receive the inspection results from the inspection device 14 or the packaging results from the packaging device 13 even after a predetermined period of time has passed since receiving the packaging results from the packaging device 13, the host computer 16 stops the production of the product. It determines that production efficiency is decreasing due to failure to complete the process or poor transfers on the line, and outputs an alarm.

After that, in step S30, the packaging device 13 discharges the packaged product to the inspection device 14, in step S31, the inspection device 14 inspects the product, and in step S32, the inspection device 14 determines that the product is good. Dispose of the product.

Here, as shown by the arrow E, after the inspection device 14 discharges the product in step S32, the product is not discharged from the inspection device 14 or packed in the caser 15 even after a predetermined period of time has elapsed. If this is not done, the product will not be discharged from the packaging process to the downstream process, which will reduce production efficiency.

If the host computer 16 does not receive the packaging results from the caser 15 or the inspection results from the inspection device 14 even after a predetermined period of time has elapsed since receiving the inspection results from the inspection device 14, the host computer 16 determines that the production of the product has stopped. It determines that the process is not completed properly or that production efficiency is decreasing due to poor transfers on the line, and outputs an alarm.

In the host computer 16, for example, after one day's production is finished, it is possible to display the day's operation results on a display device.

For example, as shown in FIG. 5, the host computer 16 determines the elapsed time since the start of production, the number of combination requests A that is the number of combination request signals sent from the packaging device 13 to the weighing device 12, and the number of packaging requests from the weighing device 12. The relationship with the combination discharge number B, which is the number of raw materials discharged to the device 13, is displayed in a graph. This makes it possible to visually grasp the relationship between time trends and production results, which was difficult to grasp while the production line is in operation, and can be used to improve production efficiency in the future. It is also possible to compare the actual performance of the company or the actual performance of multiple production lines.

Furthermore, the host computer 16 visually identifies parts of the graph where the production efficiency is decreasing based on the combination request number A and the combination output number B, such as by color-coding or circling them. Do this.

For example, when the host computer 16 places a mouse cursor over a circled area where production efficiency is decreasing, the host computer 16 displays the cause of the decrease in production efficiency in a message area adjacent to the graph display area. By displaying it as a pop-up over the graph display area, it is easier to understand the relationship between the trends in production results and the cause of the decline in production efficiency.

In FIG. 5, when the mouse cursor is placed over the circle indicated by If packaging material replacement data is recorded in the received data, a message such as "packaging material replacement" or "operation decreased due to packaging material replacement" is displayed.

When the mouse cursor is placed over the circle indicated by Y, the host computer 16 indicates that the supply request signal from the weighing device 12 is continuously turned on at times around time t2, for example, because the combination discharge number B has not increased since time t2. If the supply request signal is not recorded as OFF or the off state of the supply request signal is not recorded, a message such as "Continuous output of supply request signal", "Insufficient supply", or "Operating rate has decreased due to insufficient supply" will be displayed. let

When the mouse cursor is placed over the circle indicated by Z, the host computer 16 shows that the rate of increase in the number of combinations B, that is, the slope of the graph is small near time t3, but other event data related to efficiency decline is recorded near time t3. If this is not the case, the cause is likely to be transfer between or within the packaging area in the production line where raw materials that have variable elements and require adjustment are handled. If the number of items is decreasing, a message such as ``The operating rate has decreased due to the weighing item bridge'' is displayed.

In this way, in the embodiment described above, the host computer 16 detects that the production efficiency is decreasing based on the event data sent from the weighing device 12, the packaging device 13, the inspection device 14, and the caser 15, Outputs an alarm.

As a result, if a decline in production efficiency is detected based on event data sent from each device, an alarm is output, allowing the detection of a decline in production efficiency before it becomes abnormal. warning can be given.

Further, the host computer 16 determines that the production efficiency has decreased when the same event does not occur even after a predetermined period of time has passed since the predetermined event occurred in each device.

As a result, it is possible to detect a decrease in production efficiency when a device that repeats the same process does not perform that process even after a predetermined period of time has elapsed. It is possible to detect and warn when the temperature is decreasing.

Further, the host computer 16 determines that the production efficiency has decreased when a predetermined event does not occur even after a predetermined period of time has passed in response to notification of a predetermined event from an adjacent device on the production line.

Thereby, for example, if a combination request signal is not transmitted from the packaging device 13 even after a predetermined period of time has elapsed after the combination discharge signal was transmitted from the weighing device 12, it can be detected that the production efficiency is decreasing. It is possible to detect a decline in production efficiency and issue a warning before it becomes abnormal.

Note that in this embodiment, a case has been shown in which alarms and graphs of operating results are displayed on the display device of the host computer 16, but the information may also be transmitted and displayed on an information device such as a tablet terminal connected to the network 17. You may also do so.

Although embodiments of the invention have been disclosed, it is apparent that modifications may be made by one of ordinary skill in the art without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

1 Production management system 11 Supply equipment (production line configuration equipment for supply process)
12 Weighing device (production line configuration device for the weighing process)
13 Packaging equipment (production line configuration equipment for packaging process)
14 Inspection equipment (production line configuration equipment for inspection process)
15 Caser (production line configuration device for packaging process)
16 host computer 17 network

Claims (5)

A production management system (1) that manages a production line including two or more production line configuration devices (11, 12, 13, 14, 15) that operate in cooperation according to a preset standard sequence ,
A host computer (16) configured to be able to communicate with the production line configuration device via a network (17) and storing the reference sequence ;
When a preset event occurs, the production line configuration device transmits event data to the host computer that indicates that the event has occurred and is assigned a unique ID that identifies a data transmission source ;
The host computer is a production management system that outputs an alarm when determining that the production efficiency of the production line has decreased based on the received event data and the reference sequence . Regarding one production line constituent device that repeats the same process among the production line constituent devices,
The host computer determines that the production efficiency of the production line has decreased when the same event does not occur even after a predetermined period of time has passed since the predetermined event occurred in the production line component device. The production management system according to claim 1. Regarding two adjacent production line constituent devices on the production line among the production line constituent devices,
In response to notification of the predetermined event from one of the production line constituent devices, the host computer may cause the other production line of the production line constituent devices to remain active even after a predetermined period of time has elapsed. 3. The production management system according to claim 1, wherein when the predetermined event does not occur from a component device , it is determined that the production efficiency of the production line has decreased. 4. The production management system according to claim 1, wherein the event includes completion of processing on a product in at least one of the production line constituent devices. A production line including two or more production line component devices (11, 12, 13, 14, 15) that operate in cooperation in a preset standard sequence , and a network (17) connected to the production line component devices. A host computer (16) configured to be communicable and storing the reference sequence , the production line configuration device indicating that a preset event has occurred , and , a production management program for a production management system (1) that transmits event data assigned a unique ID that identifies a data transmission source to the host computer,
A production management program for causing the host computer to realize a function of outputting an alarm when it is determined that the production efficiency of the production line has decreased based on the received event data and the reference sequence .

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