JP3341513B2 - Tag number management method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tag number management system in a supervisory control device for plant equipment.

[0002]

2. Description of the Related Art In a plant equipment monitoring and control device, analog data and contact data are managed based on the concept of tags, and each tag is assigned a unique tag number. The tag number is usually an ASCII character string (about 8 characters).

[0003] A user of the monitoring and control apparatus can display necessary data on a CRT screen or the like by designating a tag number.

In a conventional monitoring control device, the following method is used to associate a tag number with actual data in a computer.

(1) The table of tag numbers is compared and searched from the head.

[0006] As shown in FIG.
For example, to search for the tag number “GTR9113” to be searched, each tag number registered in the tag number management table is compared and searched in order from the top.

(2) The tag number table is compared and searched by the two-branch method.

[0008] In this method, as shown in FIG.
The tag numbers registered in the tag number management table are sorted in dictionary order, and, for example, the tag number “GT
R9113 "is compared by a two-branch method.

[0009]

Among the conventional search methods, in the method of comparing and searching the table of tag numbers from the beginning, there is no particular limitation on the order of the tag numbers, but unless a very large amount of data is searched. Therefore, the load on the CPU increases.

On the other hand, in the method of comparing and searching the tag number table by the two-branch method, it is necessary to arrange the tag numbers in the tag number table in dictionary order. I need.

Although the number of times of comparison and retrieval of tag numbers is smaller than the method (1) on average, it takes about 10 times on average to search one tag from 4000 tags.

It is an object of the present invention to provide a tag number management system which makes tag registration / deletion / search processing quick and easy.

[0013]

According to the present invention, in order to solve the above-mentioned problems, various data for monitoring control are associated with tag numbers of character strings, and various data are registered, searched, and deleted by using the tag numbers. In the tag number management, tag data in which the data is written for each record is provided, a link pointer that configures the record as a bidirectional link, a flag for distinguishing between data registration, temporary registration, and unused, and the tag data A tag code management table having a logical instrument number in which a record of a data array to be written into the tag is registered; and a tag number management unit for managing the tag data management table and tag data according to the tag number. When a tag data registration / search / deletion command and a character string tag number are given, the character code and character The tag code is converted into a numerically calculated tag code based on the weight of the code, the tag code is used to determine the record position of the tag code management table, and the flag of the record position is set and the link pointer is set according to the command. It is characterized by.

Further, when the tag number management unit finds the same tag code as the record position registered in the tag code management table at the time of registering the tag data, the tag number management unit temporarily registers the tag code at an unregistered record position. It is characterized by.

In addition, when the tag number management unit finds the same tag code as the record position temporarily registered in the tag code management table when registering the tag data, the tag number management unit converts the temporary registration record into an unregistered record. Move to the position and register at the temporary registration record position.

[0016]

The tag number of the character string is converted into a numeric tag code, and the tag data is managed using the tag code as a record position of the tag code management table.

The flag of the tag code management table can be set to registration, temporary registration, and unregistered, and when the tag code has the same numerical value, it is provisionally registered at an empty record position.

When the same tag code as the temporarily registered record position is obtained, the temporarily registered data is moved to an empty record position, and the tag code data is transferred to the empty record position by this movement. register.

[0019]

FIG. 1 is an example of a management apparatus showing an embodiment of the present invention.

The tag number management section 1 is provided as an accessory function of one or a plurality of computers constituting the monitoring control device. For this tag number management, a tag code management table 2 and tag data 3 are prepared.

The tag code management table 2 has, as a data structure of each of records 1 to n, four members of a next link pointer, a previous link pointer, a flag, and a logical instrument number. Configure sex links.

A flag can be set for discriminating data registration, provisional registration, and unused. The logical instrument number is registered with a record (address) of a data array written in the tag data 3 and is associated with the tag data.

The tag number management unit 1 stores a tag number (character string)
When a command (registration, deletion, search, etc.) is given, the tag number is converted into a tag code (numerical value) with a certain regularity. This conversion is performed according to the following equation.

[0024]

(Equation 1)

M _i : the i-th character code of the character string of the tag number w _i : the weight for the i-th character code The tag code obtained by this operation determines the record position of the tag code management table 2.

Therefore, when a command and a tag number (character string) are given, the tag number management unit 1 converts the tag number into a tag code, and uses this tag code to record the record position in the tag code management table 2. And execute the command for this record position.

Tag registration is performed in the tag code management table 2
Then, the record number of the tag data 3 is registered in the logical instrument number of the record at the position corresponding to the tag code obtained by the above calculation, and the registration flag is set.

FIG. 2 shows an example of registration of a tag. When the tag code obtained from the tag (character string) becomes “100” and the record position “100” of the tag code management table 2 is in an unused state, the tag number of the tag data 3 is added to the logical instrument number of the record “100”. Register the record number and set the registration flag. In this case, since there is no other tag registered, the next link pointer and the previous link pointer remain “0”.

Next, since the tag code is obtained from the above operation, the tag code may be duplicated depending on the combination of tags (character strings). In this case, the tag code management table is searched from the top, the current tag is registered in an empty record, and the provisional placement flag is set in the flag to eliminate double of the tag code.

FIG. 3 shows a temporary registration example of a tag. When one record “100” is registered and another tag is registered and the calculation of the tag code becomes “100”,
When the record "11" is empty in the search from the top of the tag code management table, a new tag is registered in the record "11", and a temporary placement flag is set in the flag. Also, the record "1" is set in the previous link pointer.
00 "is set, and the next link pointer of the record" 100 "is set to" 11 ".

Next, when the record position of the tag code obtained this time has already been provisionally registered at the time of registering the tag, search is made from the current record onward to find a vacant (unregistered) record. Move to an empty record position, and register the current tag data at the empty record position.

FIG. 4 shows an example of registration in a temporary arrangement record position. The record "451" has already been registered, and the same tag code as that of the record "451" has been generated twice in the subsequent registration, so that the records "100" and "200" are provisionally registered. When the tag code becomes “100”, it is assumed that the record “205” is in an empty state by searching for an empty record.

At this time, the record "10"
The tag data “0” is moved to the record “205”, the link pointers of the records “200” and “451” are rewritten, and the current tag data is registered in the record “100”.

As described above, in this embodiment, a tag is converted into a tag code for registering and searching for a tag, a record position in the management table 2 is determined from the tag code, and registration and search for the tag data 3 are performed. Done. The deletion of a tag is performed by setting an unused flag in the corresponding record of the tag code management table 2 and changing the link pointer of the record before and after the record having the link pointer.

As a test based on the present embodiment, about 45% of data can be searched at once with 4000 tag data with proper weighting of character codes, and about 9 times can be searched with three searches.
It was confirmed that 8% of the data could be searched, 100% of the data could be searched in four searches, and high-speed search was possible.

[0036]

As described above, according to the present invention, a tag number of a character string is converted into a numerical tag code, and the tag data is managed as a record position of the tag code management table. The following effects are obtained.

(1) Tag search can be associated with a record position in the management table by a numeric tag code, and high-speed search can be performed.

(2) The arrangement of the tag data and the arrangement of the tag code management table may be irrelevant, and does not require the conventional rearrangement of the tag numbers.

(3) Since the tag code management table has a bidirectional link configuration, the registration, search, and deletion of tags can be done simply by editing the link pointer, which is simple and fast.

[Brief description of the drawings]

FIG. 1 is an example of a tag management device showing one embodiment of the present invention.

FIG. 2 is an example of registration of a tag in the embodiment.

FIG. 3 is an example of temporary registration of a tag in the embodiment.

FIG. 4 is an example of registration of a tag temporary arrangement record in the embodiment.

FIG. 5 shows an example of a conventional search method.

[Description of Signs] 1 ... Tag Number Management Unit 2 ... Tag Code Management Table 3 ... Tag Data

Claims (3)

(57) [Claims] 1. In a tag number management for registering, searching, and deleting various data based on a tag number of a character string with various data for monitoring control, the tag data is written for each record. A link pointer that configures a record as a bidirectional link, a flag for distinguishing between data registration, temporary registration, and unused, a logical instrument number in which a record of a data array written in the tag data is registered, and A tag code management table having tag data management tables and tag number management units for managing the tag data according to tag numbers; the tag number management unit includes a tag data registration / search / deletion command and a character string. Tag code calculated numerically from the character code of the tag number and the weight of the character code given the tag number Conversion, the tag code to determine the record location of the tag code management table, tag number management method, characterized in that for setting the set and the link pointer flag of the record position in accordance with said command. 2. The tag number management section, when registering tag data, when a same tag code as a record position registered in the tag code management table is obtained, temporarily registers the tag code in an unregistered record position. The tag number management system according to claim 1, wherein: 3. The tag number management unit, when registering tag data, when the same tag code as the record position temporarily registered in the tag code management table is obtained, unregisters the temporary registration record with an unregistered record. Move to the position,
2. The tag number management system according to claim 1, wherein the tag number is registered at the temporary registration record position.