CN107527189B - Storage method of product state and programmable logic controller - Google Patents

Storage method of product state and programmable logic controller Download PDF

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CN107527189B
CN107527189B CN201710770970.3A CN201710770970A CN107527189B CN 107527189 B CN107527189 B CN 107527189B CN 201710770970 A CN201710770970 A CN 201710770970A CN 107527189 B CN107527189 B CN 107527189B
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product
process station
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data table
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CN107527189A (en
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黄耀增
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Shanghai Juxiang Precision Mold Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/10—Office automation; Time management
    • G06Q10/101—Collaborative creation, e.g. joint development of products or services
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The embodiment of the invention relates to the field of electrical automation, and discloses a storage method of a product state and a programmable logic controller. The method comprises the following steps: extracting the state data of the product arranged at the head of the current process station queue from the data table corresponding to the current process station; acquiring the state of the product according to the extracted state data, and carrying out corresponding processing on the product according to the state; and transmitting the product to the last queue of the next process station, and moving the state data of the product to a data table corresponding to the next process station. When a product is transferred to a certain process station, the embodiment of the invention transfers the state data of the product to a data table corresponding to the process station. Thus, when the process station needs to use the status data of the product, it can directly extract from the data table. Therefore, the state of the product distributed by the current process station can be known without additionally arranging a sensor at each process station, so that the cost is saved, and the design difficulty and the design time are reduced.

Description

Storage method of product state and programmable logic controller
Technical Field
The embodiment of the invention relates to the field of electrical automation, in particular to a storage method of a product state and a programmable logic controller.
Background
Existing automation equipment includes a plurality of process stations, each of which performs a corresponding process or screening based on the current state of the product. However, the inventors of the present invention have found that, in order to know the product status (e.g., NG quality, material quality, finished product, and finish level) of the current process station, each process station needs to detect the product status in real time by a sensor installed in the process station. That is, the automation equipment needs to be equipped with sensors at each process station, and the more states and the more processes that need to be detected, the more sensors are equipped. This not only increases the cost of the device, but also increases the design difficulty and the design time of the device.
Disclosure of Invention
The embodiment of the invention aims to provide a product state storage method and a programmable logic controller, so that the state of a product distributed by a current process station can be acquired without additionally arranging a sensor at each process station, the equipment cost is saved, the design difficulty of the equipment is reduced, and the design time is shortened.
In order to solve the above technical problem, an embodiment of the present invention provides a method for storing a product status, including: extracting the state data of the product arranged at the head of the current process station queue from the data table corresponding to the current process station; acquiring the state of the product according to the extracted state data, and carrying out corresponding processing on the product according to the state; and after the processing is finished, transmitting the product to the queue tail bit of the next process station, and moving the state data to a data table corresponding to the next process station.
An embodiment of the present invention further provides a programmable logic controller, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of storing a product state as described above.
Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, which when executed by a processor can implement the storage method of the product state as described above.
Compared with the prior art, when a product is transferred to a certain process station, the state data of the product is stored in the data table corresponding to the process station. Therefore, when the process station processes the product, the state data corresponding to the product can be searched from the data table corresponding to the process station, so that the state of the product is obtained, and the product is correspondingly processed according to the state of the product. Then, when the product is transferred to the next process station, the state data of the product is also transferred to the data table corresponding to the next process station, and the next process station can acquire the state of the product only by extracting the state data from the data table corresponding to the next process station. By the method, the state of the product distributed by the current process station can be known without additionally arranging a sensor at each process station, so that the equipment cost is saved, the design difficulty of the equipment is reduced, and the design time is shortened.
In addition, the transmitting the product to the last queue bit of the next process station and moving the status data to the data table corresponding to the next process station specifically includes: transmitting the product to the next process station, and moving the state data to a temporary table for storage; and when the product reaches the end of the queue of the next process station, moving the state data from the temporary table to a data table corresponding to the next process station. The processed state data of the product is transferred in time, so that the memory can be released in time, and the storage of subsequent data is more convenient.
In addition, the data table corresponding to each process station sequentially stores the state data of each product in the queue of the process station from the first position of the data table according to the arrangement sequence of each product in the queue of the process station from front to back; extracting state data of a product arranged at the head of a queue of the current process station from a data table corresponding to the current process station, and extracting the state data from the head of the data table corresponding to the current process station; after moving the state data to a temporary table for storage, the method further comprises: and sequentially moving the remaining state data in the data table corresponding to the current process forward by one bit. The method for storing the state data of the products in the data table is provided, after the state data of the processed products are deleted from the head of the data table, the state data of other products in the queue are sequentially moved forward by one bit, so that the terminal only needs to extract the state data of the head of the table when processing new products each time, and the state of the current product can be obtained.
In addition, after the state data is moved to a temporary table for storage, the method further comprises: subtracting 1 from the data storage amount of the data table corresponding to the current process station; after moving the status data into the data table corresponding to the next process station, the method further comprises: and adding 1 to the data storage amount of the data table corresponding to the next process station. And updating the number of the products to be processed in the current process station in real time.
In addition, the status data carries any one or any combination of the following information: whether the product is an NG product, whether the material exists, whether the product is processed and the processing completion degree.
In addition, before the extracting the status data of the product ranked first in the queue of the current process station from the data table corresponding to the current process station, the method further includes: an array capable of holding 20 words is created for each process station as a data table for each process station. A data table is provided.
In addition, before the extracting the status data of the product ranked first in the queue of the current process station from the data table corresponding to the current process station, the method further includes: the method comprises the steps of obtaining state information of a product through a sensor arranged at least one process station, converting the state information into preset state data and storing the state data into a data table corresponding to the at least one process station. A method of acquiring status data is provided. The state of the product is detected only by installing sensors in part of the process stations, so that the cost of the equipment is reduced, and the design difficulty and the design time of the equipment are reduced.
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One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a flowchart of a storage method of a product status according to a first embodiment of the present invention;
fig. 2 is a flowchart of a storage method of a product status according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a data table according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of transferring data to a temporary table and moving the remaining data forward in sequence, according to a second embodiment of the present invention;
fig. 5 is a diagram of a data table corresponding to moving data to a next process station according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a method of storing a product status. The specific flow is shown in figure 1.
Step 101: a data table is created for each process station.
In this step, an array capable of holding a plurality of words (e.g., 20 words) may be created for each process station as a data table for each process station. In practical applications, the number of words that can be accommodated by the created data table can be flexibly adjusted according to the size of the data to be stored, which is not limited in this embodiment. The following shows a procedure for creating data tables for process station 1 and process station:
Figure GDA0002749493330000041
the data table corresponding to each process station may be used to store status data for each product in the queue of process stations. The queue for each process station consists of the products currently queued for processing by that process station. For example, process station 1 currently has three products, product A, product B, and product C, in line for processing. Product a, product B and product C form the queue of the current process station 1. The data tables corresponding to the process station 1 store the status data of the products a, B and C, respectively. When a new product is transferred from the process station 1, the terminal (in this embodiment, a programmable logic controller, abbreviated as "PLC") can store the state data corresponding to the new product in the data table corresponding to the process station 1. When the process station 1 transfers a product, the terminal deletes the state data corresponding to the transferred product from the data table corresponding to the process station 1. Therefore, the state data always stored in the data table corresponding to each process station can be changed continuously along with the transfer of the products.
These status data may be obtained by those process stations that have sensors installed. Specifically, the present embodiment may install a sensor on at least one process station and acquire status information of the product through the sensor. And then, the terminal can convert the acquired state information into state data in a preset format and store the state data in a data table corresponding to the at least one process station. For example, a sensor is installed at the process station 1 to detect status information of the product. After the state information of the product is obtained, the state information of the product is converted into corresponding state data, and then the corresponding state data is stored in a data table corresponding to the process station 1. When a product is transferred from process station 1 to another process station, the status data corresponding to the product is also transferred to the data table of the other process station.
Step 102: and extracting the state data of the product ranked at the head of the current process station queue from the data table corresponding to the current process station.
As described above, when a product is transferred to a process station, the status data corresponding to the product is also transferred to the data table corresponding to the process station. Therefore, in this step, when the current process station needs to process the product arranged at the head of the queue, the state data corresponding to the product can be extracted from the data table corresponding to the current process station, so as to obtain the state of the current product.
Step 103: and acquiring the state of the product according to the extracted state data, and carrying out corresponding processing on the product according to the state of the product.
The status data of the product may carry information of any one or any combination of the following: whether the product is an NG product, whether the material exists, whether the product is processed, the processing finish degree and the like. In practical application, the information carried in the status data of the product can be flexibly adjusted according to actual needs, which is not limited by the embodiment.
After the state data of the current product is obtained, the state of the current product can be obtained from the carried information. Then, the current process station can perform corresponding processing (such as processing or screening) on the product according to the state of the product.
Step 104: after the processing is completed, the product is transferred to the next process station, and the status data of the product is moved to a temporary table for storage.
The temporary table may be a one-dimensional array for temporarily storing status data of products moving to a next process station.
Step 105: and when the product reaches the end of the queue of the next process station, moving the state data of the product from the temporary table to a data table corresponding to the next process station.
At this point, the product may be queued for processing at the next process station. When the product is arranged at the first position of the queue, the next process station can extract the state data corresponding to the product from the data table corresponding to the next process station so as to acquire the state of the current product.
Compared with the prior art, when a product is transferred to a certain process station, the state data of the product is stored in the data table corresponding to the process station. Therefore, when the process station processes the product, the state data corresponding to the product can be searched from the data table corresponding to the process station, so that the state of the product is obtained, and the product is correspondingly processed according to the state of the product. Then, when the product is transferred to the next process station, the state data of the product is also transferred to the data table corresponding to the next process station, and the next process station can acquire the state of the product only by extracting the state data from the data table corresponding to the next process station. By the method, the state of the product distributed by the current process station can be known without additionally arranging a sensor at each process station, so that the equipment cost is saved, the design difficulty of the equipment is reduced, and the design time is shortened.
A second embodiment of the present invention relates to a method of storing a product status. The second embodiment is a further improvement on the first embodiment, and the main improvement is that: in the second embodiment, the data table corresponding to each process station sequentially stores the status data of each product in the queue of the process station from the first of the data table according to the arrangement order of the products in the queue of the process station from front to back.
For example, there are three products to be processed, product a, product B and product C, in the queue of process station 1, where product a is at the first and product C is at the last. Then, the first bit of the data table corresponding to the process station 1 stores the status data of the product a, and the status data of the products B and C are sequentially stored after the status data of the product a.
Furthermore, it should be noted that in the present embodiment, when the first product in the queue of the current process station is shifted and the status data of the product is also removed from the data table corresponding to the current process station, the remaining status data in the data table corresponding to the current process station is sequentially moved forward by one bit. As described above, when the product a is processed, the product a is transferred to the next process, and the status data of the product a is also removed from the data table corresponding to the process station 1. At this time, the product B is arranged at the first position, the product C is arranged at the second position, and the state data of the product B and the product C are sequentially moved forward by one position. After the movement, the state data of the product B is arranged at the head of the data table, and the state data of the product C occupies the storage position of the original state data of the product B.
The specific flow of this embodiment is shown in fig. 2, where step 201 is the same as step 101, and step 203 is the same as step 103, and this embodiment is not described again.
Step 202, extracting the state data of the product ranked at the head of the current process station queue from the head of the data table corresponding to the current process station.
As described above, the status data of the product at the head of the queue at the current process station is also stored at the head of the data table corresponding to the current process station. Thus, the current process station may extract the status data for the first product of the queue from the first of the data tables.
Fig. 3 shows a schematic diagram of a data table, wherein the D +1 th bit of the data table, which is the first bit of the data table according to this embodiment, is stored in the D +1 th bit of the status data of the product arranged at the first bit of the queue. The storage bits after the D +1 th bit (e.g., the D +2 th bit, the D +3 rd bit … …) are in turn used to store other products that are ordered after the first product in the queue. And the data at bit D +0 represents the data holding amount in the current data table. If the current data table stores the status data of 5 products, the data on the D +0 th bit is 5.
Step 204: and transmitting the product to the next process station, moving the data stored at the head of the data table to a temporary table for storage, and sequentially moving the remaining state data in the data table corresponding to the current process station forward by one bit.
As shown in fig. 4, S represents a temporary table according to the present embodiment. After the data on the first bit (bit D + 1) is moved into the temporary table, the data on the following storage bits (e.g., bit D +2, bit D +3 … …) will be moved forward one bit in sequence. At this time, the data at the head is the status data of the product currently at the head of the queue.
After the status data is moved to the temporary table and stored, the data storage amount in the data table corresponding to the current process is automatically reduced by 1, and the related procedure is as follows:
Figure GDA0002749493330000061
Figure GDA0002749493330000071
step 205: and when the product reaches the end of the queue of the next process station, moving the state data of the product from the temporary table to the tail of the data table corresponding to the next process station.
As shown in fig. 5, if there are 4 products to be processed in the current process station (i.e. the "next process station" mentioned above), 4 pieces of status data are stored in the data table corresponding to the current process station, and occupy the D +1 th bit to the D +4 th bit in sequence, and the data storage amount is 4. When the product reaches the end of the queue of the process, the number of the products to be processed at the process station is 5, and the state data of the product is also stored into the data table corresponding to the process station from the temporary table. As described above, the data table stores the status data of each product in the process station queue in order from the top of the data table according to the order of the products in the process station queue from front to back, and therefore, the status data of the product is stored in the D +5 th position, and at the same time, the data storage amount of the data table is automatically increased by 1. The relevant procedure is as follows:
Figure GDA0002749493330000072
Figure GDA0002749493330000081
it should be noted that, in the present embodiment, the process station 1 is provided with a sensor for detecting the status information of the product. After the status information is acquired, and the status data converted into the preset format is stored in the data table (data _ table _1) corresponding to the process station 1, the following procedures may be executed: data _ table _1[0]: detection
Each time a product is processed in the process station 1, the product can be transferred to the next process, and the status data of the product is also transferred from the data table corresponding to the process station 1 to the data table corresponding to the next process. At this time, the deletion of the data at the head of the data table of process station 1 and the insertion of the deleted data into the queue end of the data table of process station 2 can be realized by calling the FORM _ DELETE block and the FORM _ INSERT block. The specific procedure is as follows:
FORM_DELETE_1(data_table:＝data_table_1,del_data:＝stemp,ERR:＝ERR1)；
FORM_INSERT_1(data_table:＝data_table_1,insert_data:＝stemp,ERR:＝ERR2)；
it is easy to find that the data in the data table corresponding to each process station will change with the position of the product. However, the data table stores the status data of each product in the queue of the process station in sequence from the first position of the data table according to the arrangement sequence of each product in the queue of the process station from front to back in real time. Therefore, when the state data of the current product is needed, only the corresponding position of the data table needs to be extracted.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
A third embodiment of the present invention relates to a programmable logic controller. The programmable logic controller includes: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method for storing a product state according to the above embodiment.
Where the memory and processor are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting together one or more of the various circuits of the processor and the memory. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor.
The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store data used by the processor in performing operations.
A fourth embodiment of the present invention relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims (9)

1. A method for storing a product status, comprising:
extracting the state data of the product arranged at the head of the current process station queue from the data table corresponding to the current process station; the number of the working procedure stations is multiple, at least one working procedure station is provided with a sensor, each working procedure station is not provided with a sensor, and the state data is obtained through the working procedure station provided with the sensor;
acquiring the state of the product according to the extracted state data, and carrying out corresponding processing on the product according to the state;
and after the processing is finished, transmitting the product to the queue tail bit of the next process station, and moving the state data to a data table corresponding to the next process station.
2. The method according to claim 1, wherein the step of transferring the product to a last queue of a next process station and moving the status data to a data table corresponding to the next process station comprises:
transmitting the product to the next process station, and moving the state data to a temporary table for storage;
and when the product reaches the end of the queue of the next process station, moving the state data from the temporary table to a data table corresponding to the next process station.
3. The product state storage method according to claim 2, wherein the data table corresponding to each process station sequentially stores the state data of each product in the queue of the process station from the first of the data table according to the arrangement sequence of each product in the queue of the process station from front to back;
extracting state data of a product arranged at the head of a queue of the current process station from a data table corresponding to the current process station, and extracting the state data from the head of the data table corresponding to the current process station;
after moving the state data to a temporary table for storage, the method further comprises:
and sequentially moving the remaining state data in the data table corresponding to the current process forward by one bit.
4. The method of claim 2, wherein after moving the status data to a temporary table for storage, the method further comprises:
subtracting 1 from the data storage amount of the data table corresponding to the current process station;
after moving the status data into the data table corresponding to the next process station, the method further comprises:
and adding 1 to the data storage amount of the data table corresponding to the next process station.
5. The method for storing the product status according to claim 1, wherein the status data carries information of any one or any combination of the following:
whether the product is an NG product, whether the material exists, whether the product is processed and the processing completion degree.
6. The method for storing the status of products according to claim 1, wherein before extracting the status data of the product ranked first in the queue of the current process station from the data table corresponding to the current process station, the method further comprises:
an array capable of holding 20 words is created for each process station as a data table for each process station.
7. The method for storing the status of products according to claim 1, wherein before extracting the status data of the product ranked first in the queue of the current process station from the data table corresponding to the current process station, the method further comprises:
the method comprises the steps of obtaining state information of a product through a sensor arranged at least one process station, converting the state information into preset state data and storing the state data into a data table corresponding to the at least one process station.
8. A programmable logic controller, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of storing a product state as claimed in any one of claims 1 to 7.
9. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, implements the method of storing the product state of any one of claims 1 to 7.
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