WO2008012919A1

WO2008012919A1 - Programmable logic controller peripheral device

Info

Publication number: WO2008012919A1
Application number: PCT/JP2006/315054
Authority: WO
Inventors: Masae Okuzaki; Hiroyuki Furushima
Original assignee: Mitsubishi Electric Corporation
Priority date: 2006-07-28
Filing date: 2006-07-28
Publication date: 2008-01-31

Abstract

Provided is a PLC peripheral device capable of creating other sequence program portion by using a part of a sequence program. The PLC peripheral device includes: program block table creation means which creates a program block table correlating an identifier characterizing a sequence program portion to a used a part of a sequence program portion from a sequence program portion of use origin and a sequence program portion of use destination created by using the sequence program portion of the use origin; and affected portion data creation means which judges whether a part of the sequence program portion corrected is the part of the sequence program registered in the program block table and if yes, creates affected portion data indicating an affected portion which is affected by the correction according to the program block table.

Description

Specification

Peripheral device of programmable logic controller

Technical field

The present invention relates to a peripheral device of a programmable logic controller that creates, edits, and tests a sequence program of a programmable logic controller (hereinafter referred to as “PLC” as appropriate).

Background art

[0002] With conventional programmable logic controller (PLC) peripheral devices, there is a wide range of techniques for creating a new sequence program by duplicating a part of a sequence program created in the past and diverting it to one or more locations. Used. Thus, when a part of a sequence program created in the past is duplicated to create a new sequence program, the same program portion exists in a plurality of sequence programs.

[0003] When a new sequence program is created by such a method, it will be briefly described. First, the user of the sequence program uses the input device to select the sequence program part to be diverted from the sequence program (diversion source sequence program) created in the past, and to send the instruction information for copying to the PLC. Input to the peripheral device. The peripheral device of the PLC executes a process of copying the selected sequence program portion to be diverted according to the instruction information.

[0004] Next, the user uses the input device to indicate instruction information for pasting the selected portion of the sequence program portion to be diverted to a portion to be inserted in a sequence program (diversion destination sequence program) that is newly created. Input to the peripheral device of PLC. The peripheral device of the PLC inserts the selected sequence program portion to be diverted into the location specified by the user of the sequence program according to the instruction information. By performing such processing, a part of a sequence program created in the past can be used to create a new sequence program (see, for example, Patent Document 1).

Patent Document 1: Japanese Patent Laid-Open No. 5-100718

Disclosure of the invention Problems to be solved by the invention

[0006] However, when the user corrects a part of the sequence program at the diversion source location or the diversion destination location, the user searches or visually checks the affected sequence program and uses the diversion. It was necessary to consider whether it was necessary to make the same correction to all of the original location and the diversion destination location.

[0007] In addition, after the correction is completed, it is necessary to create a test matrix for all the corrected portions and to test all the corrected portions. In conventional PLC peripheral devices, when creating a new sequence program, the above operations are necessary, and there is a problem that the work load of the user is large and the work efficiency is not good. It was. In addition, as described above, there is a problem that an oversight may occur when searching whether the same correction is necessary.

[0008] The present invention has been made in view of the above, and an object of the present invention is to obtain a peripheral device of a PLC capable of reliably correcting a sequence program with little effort.

Means for solving the problem

[0009] In order to solve the above-described problems and achieve the object, the present invention is a PLC peripheral device that can create a part of a sequence program by using a part of a sequence program. A program block table that associates an identifier characterizing the sequence program portion with a use location of the sequence program portion from the sequence program portion and the diversion destination sequence program portion created by diverting the diversion source sequence program portion. When the program block table creation means to be created and a part of the sequence program part are modified, it is determined whether the modified part is a part of the sequence program part registered in the program block table, If you are registered! Based effects location data indicating the program block table, the impact point data generating means for generating Te with a characterized Rukoto.

The invention's effect

[0010] According to the peripheral device of the programmable logic controller that is useful in the present invention, the identifier that characterizes the sequence program portion and the use location of the sequence program portion are matched. An associated program block table is created, and when a part of the sequence program part is modified, it is determined whether the modified part is a part of the sequence program part registered in the program block table. If registered, the affected part data indicating the affected part affected by the modification is created based on the program block table, so that the necessary part of the modification is surely overlooked and the work efficiency is improved. The sequence program can be modified.

. Therefore, it is possible to obtain a PLC peripheral device that can correct the sequence program reliably with little effort.

Brief Description of Drawings

[FIG. 1-1] FIG. 1-1 is a configuration diagram showing a configuration of a peripheral device system of a PLC that is useful for an embodiment of the present invention.

[FIG. 1-2] FIG. 12 is a block diagram showing an example of the configuration of the control unit shown in FIG.

FIG. 2 is a block diagram showing an example of the configuration of the data memory shown in FIG. 1-1.

FIG. 3 is a diagram showing a circuit display example of a diversion source sequence program before diversion of the sequence program in the peripheral device of the PLC, which is effective in the embodiment of the present invention.

FIG. 4 is a diagram showing a display example of a list of diversion source sequence program data before diverting a sequence program in a PLC peripheral device according to an embodiment of the present invention.

FIG. 5 is a diagram showing a circuit display example of a diversion-destination sequence program in which a sequence program is diverted in a peripheral device of a PLC that is useful for an embodiment of the present invention.

FIG. 6 is a view showing a display example of a list of sequence program data after diversion in which a sequence program is diverted in a peripheral device of a PLC that is useful for an embodiment of the present invention.

[FIG. 7] FIG. 7 is a flowchart for explaining the flow of processing for creating a loop table of a program when a sequence program is diverted in a peripheral device of the PLC which is effective in the present embodiment.

[Fig. 8-1] Fig. 8-1 shows a sequence diagram of a peripheral device of the PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of data at the time of implementing the diversion process of a maintenance program

[FIG. 8-2] FIG. 8-2 is a diagram for explaining a change in data when the diversion processing of the sequence program is performed in the peripheral device of the PLC that is useful for the embodiment of the present invention.

[FIG. 8-3] FIG. 8-3 is a diagram for explaining a change in data when the diversion processing of the sequence program is performed in the peripheral device of the PLC that is useful for the embodiment of the present invention.

[FIG. 8-4] FIG. 8-4 is a diagram for explaining a change in data when the diversion processing of the sequence program is performed in the peripheral device of the PLC that is useful for the embodiment of the present invention.

[FIG. 8-5] FIG. 8-5 is a diagram for explaining changes in data when the diversion processing of the sequence program is performed in the peripheral device of the PLC, which is useful for the embodiment of the present invention.

[FIG. 8-6] FIG. 8-6 is a diagram for explaining changes in data when the diversion processing of the sequence program is performed in the peripheral device of the PLC, which is useful for the embodiment of the present invention.

[FIG. 9-1] FIG. 9-1 is a flow chart for explaining the flow of processing when correcting a diverted sequence program block in the peripheral device of the PLC that is effective in the embodiment of the present invention.

[FIG. 9-2] FIG. 9-2 is a flow chart for explaining the flow of processing when the diverted sequence program block is corrected in the peripheral device of the PLC that is effective in the embodiment of the present invention.

[FIG. 10-1] FIG. 10-1 is a diagram for explaining the change of data when the sequence program block used in the peripheral device of the PLC, which is useful for the embodiment of the present invention, is corrected.

[FIG. 10-2] FIG. 10-2 is a diagram for explaining a change in data when the sequence program block used in the peripheral device of the PLC, which is useful for the embodiment of the present invention, is corrected. FIG.

[FIG. 10-3] FIG. 10-3 is a diagram for explaining the data change when the sequence program block used in the peripheral device of the PLC, which is useful for the embodiment of the present invention, is corrected.

[FIG. 10-4] FIG. 10-4 is a diagram for explaining a change in data when the sequence program block used in the peripheral device of the PLC, which is useful for the embodiment of the present invention, is corrected.

[FIG. 10-5] FIG. 10-5 is a diagram for explaining the data change when the sequence program block used in the peripheral device of the PLC, which is useful for the embodiment of the present invention, is corrected.

[FIG. 10-6] FIG. 10-6 is a diagram for explaining the data change when the sequence program block used in the peripheral device of the PLC, which is useful for the embodiment of the present invention, is corrected.

[FIG. 10-7] FIG. 10-7 is a diagram for explaining the data change when the sequence program block used in the peripheral device of the PLC, which is useful for the embodiment of the present invention, is corrected.

[FIG. 11] FIG. 11 is a flowchart for explaining the flow of processing for creating a test matrix table when a sequence program block test is performed in the peripheral device of the PLC according to the embodiment of the present invention.

[Fig. 12-1] Fig. 12-1 shows changes in data when creating a test matrix table when a sequence program block test is performed in a peripheral device of a PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating.

[Fig. 12-2] Fig. 12-2 shows changes in data when creating a test matrix table when a sequence program block test is performed in a peripheral device of the PLC, which is effective in the embodiment of the present invention. It is a figure for demonstrating.

[Fig. 12-3] Fig. 12-3 shows changes in data when creating a test matrix table when a sequence program block test is performed on a peripheral device of a PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating. [Fig. 12-4] Fig. 12-4 shows changes in data when creating a test matrix table when a sequence program block test is performed in a PLC peripheral device that is effective in the embodiment of the present invention. It is a figure for demonstrating.

[Fig. 12-5] Fig. 12-5 shows changes in data when creating a test matrix table when testing a sequence program block in a peripheral device of a PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating.

[Fig. 12-6] Fig. 12-6 shows changes in data when creating a test matrix table when a sequence program block test is performed in a peripheral device of a PLC that is effective in the embodiment of the present invention. It is a figure for demonstrating.

FIG. 13 is a diagram showing a test matrix table created in the peripheral device of the PLC according to the embodiment of the present invention.

FIG. 14 is a diagram showing an instruction table used when creating a test matrix in the peripheral device of the PLC that is relevant to the embodiment of the present invention.

[Fig. 15-1] Fig. 15-1 shows the process of creating the test procedure table when the user manually executes the sequence program block test in the peripheral device of the PLC, which is useful for the embodiment of the present invention. It is a flowchart explaining a flow.

[FIG. 15-2] FIG. 15-2 is a flowchart for explaining the flow of processing for applying the test procedure table created by the peripheral device of the PLC, which is useful for the embodiment of the present invention, to other test matrix tables. is there.

[Fig. 16-1] Fig. 16-1 shows a case where the test is manually performed by the user and the test matrix belonging to the same group is similar in the peripheral device of the PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of the data at the time of applying the test procedure and a test result to it.

[Fig. 16-2] Fig. 16-2 shows a case where the test is manually performed by the user and the test matrix belonging to the same group is similar in the peripheral device of the PLC that is effective in the embodiment of the present invention. It is a figure for demonstrating the change of the data at the time of applying the test procedure and a test result to it.

[Fig. 16-3] Fig. 16-3 shows a test of a peripheral device of PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of the data when a user implements an experiment manually and the test procedure and test result are applied to what is similar in the test matrix which belongs to the same group.

[Fig. 16-4] Fig. 16-4 shows a case where the test is manually performed by the user and the test matrix belonging to the same group is similar in the peripheral device of the PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of the data at the time of applying the test procedure and a test result to it.

[Fig. 16-5] Fig. 16-5 shows a case where the test is manually performed by the user in the peripheral device of the PLC, which is useful for the embodiment of the present invention, and the test matrix belonging to the same group is similar. It is a figure for demonstrating the change of the data at the time of applying the test procedure and a test result to it.

[Fig. 16-6] Fig. 16-6 shows a case where the test is manually performed by the user and the test matrix belonging to the same group is similar in the peripheral device of the PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of the data at the time of applying the test procedure and a test result to it.

[Fig. 16-7] Fig. 16-7 shows a case where the test is manually performed by the user and the test matrix belonging to the same group is similar in the peripheral device of the PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of the data at the time of applying the test procedure and a test result to it.

[Fig. 16-8] Fig. 16-8 shows a case in which the test is manually performed by the user and the test matrix belonging to the same group is similar in the peripheral device of the PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of the data at the time of applying the test procedure and a test result to it.

[Fig. 16-9] Fig. 16-9 shows a case where the test is manually performed by the user and the test matrix belonging to the same group is similar in the peripheral device of the PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of the data at the time of applying the test procedure and a test result to it.

[Fig. 16-10] Fig. 16-10 shows the peripheral device of the PLC that is useful for the embodiment of the present invention. It is a figure for demonstrating the change of the data when a user performs a test manually and applies the test procedure and a test result with respect to what the test matrix which belongs to the same group becomes similar.

FIG. 17 is a diagram showing a circuit display example of a sequence program that has already been created.

FIG. 18 is a diagram showing the sequence program of FIG. 17 displayed in a list format.

FIG. 19 is a flowchart for explaining the flow of processing for creating a program block table in the peripheral device of the PLC according to the embodiment of the present invention.

[FIG. 20-1] FIG. 20-1 is a diagram for explaining changes in data when creating a program block table in the peripheral device of the PLC, which is useful in the embodiment of the present invention.

[FIG. 20-2] FIG. 20-2 is a diagram for explaining a change in data when a program block table is created in the peripheral device of the PLC, which is useful for the embodiment of the present invention.

[FIG. 20-3] FIG. 20-3 is a diagram for explaining a change in data when creating a program block table in the peripheral device of the PLC, which is useful for the embodiment of the present invention.

[FIG. 20-4] FIG. 20-4 is a diagram for explaining a change in data when a program block table is created in the peripheral device of the PLC, which is useful for the embodiment of the present invention. Explanation of symbols

1 Peripheral device

2 Input device

3 Display device

4 Printing device

5 External storage device

6 Program memory

7 Data memory

8 Control unit

8a Program block table creation part

8b Affected location data creation part

8c Modification application section d Existing program block table creation section e Test matrix creation section

1 Sequence program data

2 Diversion data

3 Program block tape

4 Test matrix table

5 Instruction table

6 Test procedure table

7 Affected location data

0 Screen image

1 Sequence program block

2 codes of source sequence program data

3 Instruction part

Address part

Sequence program block

screen image

1 Sequence program block

Sequence program block

List of sequence program data after diversion

Instruction part

Address part

Sequence program block

Sequence program data

Sequence program part

Sequence program 72 Sequence program data

73 Diversion data

74 Program block table

76 identifier

77 Number of steps used

80 codes

81 Instruction part

82 Address part

83 records

84 Sequence program part

87 Program block table

89 Address part

90 Sequence program data

100 Sequence program data

101 program block table

102 Diversion source sequence program part

103 Sequence program part

104 Sequence program

104 Sequence program data

105 Sequence program part

106 Correction data

107 records

110 Number of steps used

112 Instruction part

114 code

115 program block tape 116 records

117 records 122 Sequence program part

123 Correction candidate list screen

125 Candidate for correction

126 Check box

127 Selection correction button

128 All correction buttons

129 Cancel button

130 Program block table

131 records

132 records

137 Program block tape

150 test matrix table

156 Numerical data

160 instruction table

162 Instruction part

170 Sequence program data

171 Sequence program part

172 Sequence program part

173 Instruction part

174 Address part

175 Program block tape

176 identifier

178 test matrix

179 Instruction Z address input field

182 Number of steps used

184 Test matrix creation selection screen

185 Sequence program part 186 check box

187 line button

190 Address part

191 test matrix

195 Test address status

196 Output result

211 program blocks

212 program blocks

213 program blocks

215 program blocks

220 Program block tape

221 Program block tape

222 Program block tape

222 records

222 New record

223 Program block tape

224 records

225 Program block tape

250 Sequence program data

251 Sequence program part

251 program blocks

252 Sequence program part

252 program blocks

253 test matrix

254 Output result address

256 test procedure table

260 Address number input field

261 Address status input field 263 Sequence program part

263 Ladder program

264 address part

266 dress part

267 Test Matrix

267 test matrix

268 Output result

268 Output result input field

270 Test result input field

271 Address part

274 number

275 address part

276 address

280 Test Procedure Table

281 data

282 Sequence program part

282 Ladder display

283 Output result address

283 case address

284 Address part

285 test matrix

286 Address status result

289 address

290 test matrix

291 test matrix

292 test results

294 test results

296 Test result input field 299 Address state

300 sequence program

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of a programmable logic controller peripheral device system according to the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the following description and can be appropriately changed without departing from the gist of the present invention.

[0014] Embodiment

FIG. 1-1 is a configuration diagram showing a configuration of a PLC peripheral device system according to an embodiment of the present invention. As shown in Fig. 1-1, the peripheral device system of the PLC that is relevant to the embodiment is connected to the peripheral device 1 of the PLC (hereinafter referred to as peripheral device 1) and the peripheral device 1 of the PLC. And an input device 2 such as a keyboard, a display device 3 such as a CRT, a printing device 4 such as a printer, and an external storage device 5 such as a hard disk.

[0015] The PLC peripheral device 1 is a PLC peripheral device capable of creating another sequence program part by diverting a part of the sequence program, and stores programs such as a sequence program. It consists of a program memory 6, a data memory 7 that stores data such as variable data, a control unit 8 that controls the processing of system programs such as a CPU (Central Processing Unit) and the entire processing in the peripheral device 1 of the PLC. ing.

In addition, the control unit 8 has a program block table creation function, an affected part data creation function, a modification application function, an existing program block table creation function, and a test matrix creation function.

[0017] The program block table creation function is executed by the program block table creation unit 8a of the control unit 8 as shown in Fig. 1-2, and uses the diversion source sequence program portion and the diversion source sequence program portion. This is a function that creates a program block table in which the identifier that characterizes the sequence program part and the use location of the sequence program part are associated from the created sequence program part of the diversion destination.

[0018] The affected part data creation function is executed by the affected part data creation unit 8b of the control unit 8 as shown in Fig. 12 and is registered in the program block table. This is a function that creates affected area data indicating the affected area affected by the modification based on the program block table when a part of the gram part is modified.

The correction application function is executed by the correction application unit 8c of the control unit 8 as shown in FIG. 12, and based on the correction application information indicating that the correction is applied to the affected part included in the affected part data. This is a function that automatically applies corrections to the sequence program part of the diversion destination corresponding to the affected part included in the affected part data.

[0020] The existing program block table creation function is executed by the existing program block table creation unit 8d of the control unit 8 as shown in Fig. 12 and creates a program block table corresponding to all or part of the existing sequence program. This function creates a program block table for an existing program in accordance with the program block table creation instruction.

[0021] The test matrix creation function is executed by the test matrix creation unit 8e of the control unit 8 as shown in Fig. 1-2, and the test matrix for performing the test on the corrected part and the affected part is a program block. This function also creates table power.

[0022] In the present embodiment, the control unit 8 has the above-described functions, but the function units having the respective functions may be provided independently.

Next, the data memory 7 will be described with reference to FIG. FIG. 2 is a block diagram showing an example of the configuration of the data memory 7 shown in FIG. 1-1. For example, as shown in FIG. 2, the data memory 7 includes sequence program data 21, diversion data 22, program block table 23, test matrix table 24, instruction table 25, test procedure table 26, The location data 27 is stored.

The sequence program data 21 is data of a sequence program that is being edited and created. The diversion data 22 is diversion data that is temporarily stored in order to divert the sequence program data portion when editing the sequence program. The program block table 23 is a program block table for creating the sequence program data described by the user.

[0025] The test matrix table 24 is a test matrix table for testing the generated sequence program data. The instruction table contains sequence program data. This is an instruction table for creating a test matrix table with reference to the data. The test procedure table 26 is a test procedure table for storing test procedures manually performed from the test matrix by the user.

Next, the operation of the peripheral device 1 of the PLC, which is useful for the embodiment of the present invention, will be described. Hereinafter, a case will be described in which the sequence program portion specified by the user in the sequence program data is used for other sequence program data. Here, a description will be given using an example in which a sequence program portion 71 designated by the user is used for the sequence program data 72 to be described later.

FIG. 3 is a circuit display example of the diversion source sequence program before diversion of the sequence program in the peripheral device 1 of the PLC, which is useful for the present embodiment, displayed on the display device 3. FIG. 3 shows a screen image 30 in which a sequence program is displayed as a ladder, and a sequence program block 31 is described as a block of the sequence program that the user wants to divert.

[0028] When the sequence program is displayed in a list format, it is displayed as shown in FIG. FIG. 4 is a display example of the list 40 of diversion source sequence program data before diverting the sequence program in the peripheral device of the PLC that is relevant to the present embodiment. As shown in FIG. 4, the list 40 includes step No. 41 and code 42. Code 42 is the code in the diversion source sequence program data.

Step No. 41 is a step number provided corresponding to the code 42 of the sequence program data. The code 42 is composed of a combination of the instruction part 43 and the address part 44. The sequence program block 45 is a sequence program block that the user wants to divert, and corresponds to the sequence program block 31 in FIG.

FIG. 5 is a circuit display example of a diversion destination sequence program that is displayed on the display device 3 and used for the sequence program in the peripheral device 1 of the PLC that is effective in the present embodiment. Fig. 5 shows a screen image 50 in which a sequence program is displayed in a ladder form. The sequence program block 51 is a copy source for diversion, and the address is created after the sequence program block 51 is diverted. Sequence program Ram block 52 is described.

[0031] When the sequence program is displayed in a list format, it is displayed as shown in FIG. FIG. 6 is a display example of a list 60 of post- diversion sequence program data in which the sequence program is diverted in the peripheral device 1 of the PLC that is relevant to the present embodiment. As shown in FIG. 6, in the list 60, step No. 61 and code 62 are described. Code 62 is the code in the sequence program data after diversion.

[0032] Step No. 61 is a step number provided corresponding to the code 42 of the sequence program data. The code 62 is composed of a combination of the instruction part 63 and the address part 64. The sequence program block 65 is a sequence program block diverted by the user, and corresponds to the sequence program block 51 in FIG. Further, the sequence program block 66 is a sequence program block created by editing the address after diverting the sequence program block 65, and corresponds to the sequence program block 52 in FIG.

[0033] Hereinafter, the processing of the peripheral device of the PLC, which is useful for the present embodiment, will be described along the flow of processing. First, the diversion processing of the sequence program will be described using FIG. 7 and FIGS. 8-1 to 8-6. FIG. 7 is a flowchart for explaining the flow of processing for creating a program loop table when a sequence program is diverted in the peripheral device 1 of the PLC, which is effective in the present embodiment. FIGS. 8-1 to FIGS. 8-6 are diagrams for explaining the change of data when the diversion processing of the sequence program is performed in the peripheral device 1 of the PLC which is useful for the present embodiment.

Here, a case will be described in which the sequence program data is applied to the sequence program data 70 being created as shown in FIG. 8-1. As shown in Fig. 8-1, the sequence program data 70 before the diversion of the sequence program data is selected by the user using the input device 2 in order to select and copy the sequence program portion 71 to be diverted. Input the selection instruction information 'copy instruction information to peripheral device 1 of the PLC.

When the peripheral device 1 of the PLC receives the above data selection instruction information 'copy instruction information (step S 1), the diverted sequence selected according to the instruction information as shown in FIG. 8-2. The copy program portion 71 is copied to the data memory 7 as the diverted data 73 (step S2).

Next, the peripheral device 1 of the PLC uses the instruction part 81 obtained by removing the address part 82 from the code 80 of the diversion data 73, and uses the new identifier 76 and the management number as shown in FIG. 8-3. A record 83 having 75 is created and registered in the program block table 74 (step S3). In the program block table 74, as shown in FIG. 8-3, the number of steps used 77 and the start step number 78 are described. These are created from the step number 79 of the diversion data 73.

[0037] Next, using the input device 2, the user uses the input device 2 to send paste instruction information for pasting the sequence program portion 71 selected and copied to a desired portion in the sequence program data being created. Input to peripheral device 1 of PLC. When the peripheral device 1 of the PLC receives this pasting instruction information (step S4), the sequence program portion 71 that is selected and copied according to the pasting instruction information as shown in FIG. 8-4 is used as the sequence program 72. Paste (insert) in the specified place in the middle (step S5). In Fig. 84, the sequence program part 84 of steps No. 6 to 9 is pasted.

A program block (inserted). Figure 8-4 shows the sequence program data before address correction.

[0038] Next, the peripheral device 1 of the PLC starts the sequence program portion 84 assigned to the shell from (step No.) 85 of the sequence program portion 84 pasted to the sequence program data 72. The step number (here “6”) is additionally registered in (start step number) 78 of the program block table 74 (step S6). Figure 8-5 shows the program block table 87 after registration.

[0039] Next, the user uses the input device 2 to correct the address correction instruction information for correcting the address portion 89 of the sequence program portion 84 pasted and pasted according to the application. Input to device 1. When the peripheral device 1 of the PLC receives this address correction instruction information (step S7), it corrects the address part 89 of the sequence program part 84 according to the address correction instruction information (step S8). Thus, the program editing process using the sequence program data is completed. Sequence completed The program data 90 is shown in Figure 8-6.

[0040] Next, using Fig. 9-1, Fig. 9-2, and Fig. 10-1 to Fig. 10-7, diverting a part of the edited sequence program according to the above procedure. The procedure for the peripheral device system to notify the user of the range of influence on the diversion source location or all diversion destination locations is explained.

FIG. 9A and FIG. 92 are flowcharts for explaining the flow of processing when the used sequence program block is corrected in the peripheral device 1 of the PLC that is effective in the present embodiment. FIGS. 10-1 to 10-6 are diagrams for explaining data changes when the sequence program block used in the peripheral device 1 of the PLC, which is useful for the present embodiment, is corrected. is there. Here, it is chosen to apply the correction to the affected area, and the explanation will be made up to the point where the correction is applied.

[0042] The sequence program data 100 (corresponding to Fig. 8-6) and the program block table 101 (corresponding to Fig. 8-5) in the state where the above-described diversion and editing processing is completed are shown in Figs. 10 1 and 10-2, respectively. Shown in The sequence program data 100 shown in FIG. 10-1 includes a diversion source sequence program portion 102 and a diversion destination sequence program portion 103.

[0043] In this state, in order to edit the diversion source sequence program part 102, for example, the user inputs correction instruction information for adding the code "ANI X4" to the peripheral device 1 of the PLC using the input device 2. To do. When the peripheral device 1 of the PLC receives the correction instruction information (step S11), the peripheral device 1 of the PLC performs correction by adding (code “ANI X4”) to the diversion source sequence program portion 102 according to the correction instruction information (step S12). The modified sequence program data 104 is shown in Figure 10-3.

As shown in FIG. 10-3, in the modified sequence program data 104, modified data 106 (code “ANI X4”) is added to the modified sequence program portion 105. Also, by assigning “3” as step No. 113 to the modified data 106, the subsequent step No. 113 is added one by one.

Next, the peripheral device 1 of the PLC refers to the number of used steps 110 and the start step number Ill of the program block table 101 shown in FIG. It is determined whether or not the record 101 contains a record that includes the sequence program part before correction (corresponding to the diversion source sequence program part 102 in Fig. 10-2) of the corrected sequence program part 105 (step 10). S13). Here, when the record including the sequence program part before the correction of the corrected sequence program part 105 is not registered in the program block table 101 (No at Step S13), the process is ended.

[0046] When a record including the sequence program part before the correction of the corrected sequence program part 105 is registered in the program block table 101 (here, record 107 is registered) (Yes in step S13) Peripheral device 1 of PLC performs the correction to delete the step number (0 in this case) of the corrected part from the start step number Ill in record 107 and updates it as record 116.

Then, the peripheral device 1 of the PLC has a new identifier 119 (here, “LD—OR—AND—ANI—OUTJ”) from the instruction portion 112 in the code 114 of the modified sequence program portion 105. Record 117 is created and added to program block table 101 (step S14).

At the same time, the peripheral device 1 of the PLC corrects and updates all the start step numbers 121 affected by the correction location in the program block table 101. Here, the value of the start step No. 121 of the record 116 is corrected to “7” and updated. The program block table 115 updated in this way is shown in Fig. 10-4.

[0049] Next, the peripheral device 1 of the PLC determines that the sequence program part belonging to the same group has the power from the start step No. 121 of the record 116 to which the correction point belongs, that is, the record 116. It is checked whether there is a sequence program part that belongs (including the sequence program part before modification) (step S15).

[0050] Here, if there is no other sequence program part belonging to the record 116 (No in step S15), if the start step number of the record to which the correction point belongs is blank, the record Is discarded (step S19), and the process is terminated.

[0051] On the other hand, if there is another sequence program part belonging to the record 116 (Yes at step S15), the program part which is the first correction candidate is displayed on the display device 3. By highlighting at step S16, the user is notified of the location affected by the correction, and the user is requested to indicate whether the location needs to be corrected ("Z to correct, do not correct") (step S16). . In this example, the sequence program part starting at step “7” belongs to the start step No. 121 of record 116.

[0052] In this case, for example, a correction candidate list screen 123 as shown in FIG. 10-5 is displayed on the display device 3, and is registered in the start step No. 124 of the corrected portion of the corrected sequence program and in the record 116. Start step No. 125 is displayed. At the same time, in the modified sequence program 104 as shown in FIG. 10-3, the sequence program portion 122 which is the first modification candidate is highlighted. As a result, the peripheral device 1 of the PLC notifies the user of the location affected by the correction, and requests the user whether or not the location needs to be corrected (“Z to correct, do not correct”).

[0053] When there are a plurality of correction candidates, a plurality of correction candidates 125 are displayed on the correction candidate list screen 123 as shown in FIG. 10-5, and the sequence program portion selected by the user is highlighted. The Then, the peripheral device 1 of the PLC determines whether or not the correction application instruction information has been input (step S17).

[0054] The user determines whether or not to apply the correction by looking at the correction candidate list screen 123 and the sequence program portion 122 highlighted as the correction candidate portion in the corrected sequence program 104. be able to. As a result, the user can reliably correct the sequence program with good work efficiency without overlooking the necessary portions.

[0055] When the sequence program portion 122 highlighted as the correction candidate portion is to be corrected, the user uses the input device 2 to display correction application instruction information for applying the correction to the correction candidate. Used to input to the peripheral device 1 of the PLC.

[0056] For example, in this example, the correction candidate list screen 123 is prepared for each correction candidate 125! Check box 126 is selected for each correction candidate, and the selected correction button 127 is selected to select the correction candidate. The correction application instruction information for applying the correction is input.

In addition, when a correction is applied to all correction candidates, the user inputs correction application instruction information to that effect to the peripheral device 1 of the PLC using the input device 2. For example, The user selects the all correction button 128 on the correction candidate list screen 123. If the correction is not applied to the correction candidate, the correction non-application instruction information to that effect is input to the peripheral device 1 of the PLC using the input device 2. For example, the user selects the cancel button 129 on the correction candidate list screen 123.

[0058] When the user selects to apply the correction to the correction candidate, that is, when the peripheral device 1 of the PLC receives the correction application instruction information (Yes in step S17), the peripheral device 1 of the PLC The start step No. 121 (here “7”) from the record 116 shown in FIG. 10-4 is moved to the start step No. 121 of the record 117 (step S20). The program block table 130 after moving the start step No. is shown in Figure 10-6. As shown in Figure 10-6, record 116 is updated as record 131 whose start step number is blank. Further, the record 117 is updated as the record 132 in which the start step number (here “7”) is moved from the record 116. Then, the process proceeds to step S18.

[0059] On the other hand, returning to step S17, if the user selects not to apply the correction to the correction candidate, that is, if the peripheral device 1 of the PLC does not receive the correction application instruction information (the correction non-application instruction information is displayed). If received (No at step S17), the peripheral device 1 of the PLC refers to the start step No. 136 of the record 131 and checks whether there are other correction candidates (step S18).

[0060] If there is no other candidate for correction (No at step S18), the peripheral device 1 of the PLC refers to the start step No. 136 of the program block table 130, and the start step No. is blank. Is deleted (step S19). In this example, record 131 is deleted. FIG. 10-7 shows the program block table 137 after the record 131 is deleted in this way. When the peripheral device 1 of the PLC receives the modification application instruction information (when the modification non-application instruction information is received) (No at step S17), the program block table remains records 116 and 117.

[0061] If another correction candidate exists in step S18 (Yes in step S18), the next correction candidate is highlighted to prompt the user to determine whether or not to correct. Is requested to make a correction (“Z to correct, do not correct”) (step S21), and the process returns to step S17. [0062] In the above-described example, when a part of a sequence program specified by the user is diverted, the diversion source location and the diversion destination location are managed as a group (collective), This section describes the procedure for applying corrections to affected locations after displaying and notifying the affected locations on the diversion source location or all diversion destination locations to the user when a part of the diversion source or diversion destination sequence program is modified. It was.

[0063] Next, referring to FIG. 11 and FIG. 12-1 to FIG. 12-6, when a part of the sequence program diverted by the PLC peripheral device system according to the procedure described above is corrected, the user is notified. Display the test matrix, notify the sequence program block that is in the affected area from the program block table, and select whether to execute or not to perform the affected area test, and create a test matrix for the selected program block The procedure up to is explained.

FIG. 11 is a flowchart for explaining the flow of processing for creating a test matrix table when a sequence program block test is performed in the peripheral device 1 of the PLC, which is useful for the present embodiment. Also, Fig. 12-1 to Fig. 12-6 show changes in data when creating a test matrix table when a sequence program block test is performed in the peripheral device 1 of the PLC that is useful in this embodiment. It is a figure for demonstrating.

[0065] In the following example, the test matrix of the modification part of the sequence program is displayed in the peripheral device system of the PLC, and a screen for selecting whether or not to perform tests in a range that becomes a similar test matrix is displayed. The procedure up to displaying the test matrix of the test execution range selected by the user will be described.

FIG. 13 shows a test matrix table 150 created in the peripheral device 1 of the PLC in the present embodiment. This is a test matrix table that also creates the sequence program block force selected by the user in the sequence program created by the user. In the test matrix table 150, combination data (instruction part Z address) 151 of an instruction part and an address part is stored in association with (Management No.) 154.

Further, FIG. 14 shows an instruction table 160 used when creating the test matrix. The instruction table 160 includes an instruction part 162 and a (management No.) 161 corresponding thereto.

[0068] Sequence program data in a state where the diversion process described above is completed 17 0 (corresponding to Fig. 8-6) and program block table 175 (corresponding to Fig. 8-5) are shown in Fig. 12-1 and Fig. 12-2, respectively. The sequence program data 170 shown in 012-1 includes a diversion source sequence program portion 171 and a diversion sequence program portion 172. The diverted sequence program part 172 is a state where the diversion source sequence program part 171 is copied and pasted, and the change of the device number is completed. The diversion source sequence program portion 171 and the diversion sequence program portion 172 are assigned to the identifier 176 of the program block table 175.

[0069] Hereinafter, a description will be given along the flow of processing. First, in order to select the program data portion 171 as the location to be tested for the corrected program data portion, the user uses the input device 2 to select data selection instruction information for selecting the program data portion 171. Input to the peripheral device 1 of the PLC. When the peripheral device 1 of the PLC receives the data selection instruction information (step S41), the PLC peripheral device 1 selects the sequence program part 171 in accordance with the data selection instruction information, and selects the instruction part 173 of the selected sequence program part 171 as shown in FIG. A test matrix is created by searching the instruction table 160 (step S42).

[0070] Here, if the corresponding instruction exists in the instruction table 160 of FIG. 14, the sequence program portion 171 is entered in the (instruction Z address) input field 179 of the test matrix 178 as shown in FIG. 12-3. The instruction part 173 and the address part 174 are copied.

On the other hand, if the corresponding instruction does not exist in the instruction table of FIG. 14, the instruction part 173 of the sequence program part 171 is displayed in the column of the output result 196 of the test matrix 178 as shown in FIG. 12-3. The address part 174 is copied, and the test pattern according to the address state is displayed in the test address state 195 column of the test matrix 178.

Next, the peripheral device 1 of the PLC searches the (start step number) 193 of the sequence program portion 171 with the (start step number) 177 of the program block table 175. Here, “0” is searched for (start step number) 177 in the program block table 175 as the start step number (step S43).

When the corresponding start step exists, the peripheral device 1 of the PLC determines whether or not the next start step number is included in (start step number) 177. In this case, Since the start step number “0” exists in the (start step number) 177 of the program block table 175, the peripheral device 1 of the PLC determines whether or not there is a next start step number. In this case, “Start Step No.” 177 includes “6” as the start step number.

In this case, the peripheral device 1 of the PLC is used as shown in FIG. 12-2 from the start step number “6” that is a candidate for the next start step number as shown in FIG. 12-2. By highlighting the range of 182 steps (4 steps) on the test matrix creation selection screen 184 as shown in Fig. 12-4 displayed on the display device 3, the test execution or non-execution is shown to the user. Prompt decision (step S44).

[0075] In the test matrix creation selection screen 184 shown in Fig. 12-4, the sequence program portion 185 is highlighted. Then, the peripheral device 1 of the PLC determines whether there is a next start step (step S45). If there is a next start step (Yes at step S45), the process returns to step S43 and the same processing is repeated until the next candidate for the start step of the program block table is completed.

[0076] If there is no next start step! / (No in step S45), the user determines whether or not to execute the test matrix creation and selects it. As a result, the user can determine whether or not to create the test matrix by looking at the sequence program portion 185 highlighted on the test matrix creation selection screen 184. As a result, the user can easily determine whether the test is performed or not, and if the test is similar, it can be omitted, and the test can be performed efficiently.

[0077] When performing a test, the user inputs designation instruction information for designating a desired test candidate to the peripheral device 1 of the PLC using the input device 2. When the peripheral device 1 of the PLC receives this designated instruction information (step S46), it starts to create a test matrix for the designated test candidate according to the designated instruction information.

For example, on the test matrix creation selection screen 184, the user checks a desired one of the check boxes 186 prepared for each test candidate and selects the execution button 1 87.

[0079] The peripheral device 1 of the PLC copies the test matrix 178 and creates the same new as the test matrix 178. A new test matrix 191 is created (step S47). Next, the copied test matrix device is calculated and replaced by the start and use steps of the sequence program table. That is, copy the address part 190 of the sequence program part shown in Fig. 12-5 to the column 192 (command / do, less) 192 of the test matrix 191 (shown in step S48). .

Then, the peripheral device 1 of the PLC determines whether there is a next test candidate (step S 49). If there is a next test candidate (Yes in step S49), the process returns to step S47, and the PLC peripheral device 1 includes all of the sequence program test candidates previously selected on the test matrix creation selection screen 184 by the user. On the other hand, the same processing is repeated, and when there are no more test candidates (No at step S49), the creation of the test matrix is terminated.

[0081] As described above, according to the peripheral device 1 of the PLC that works with the present embodiment, when a test is performed on a sequence program in which a part of the sequence program is duplicated and used in other places. Test items for the correction part and the affected part of the correction are automatically generated from the program block table, and the test items created by the program block table are similar test items. By determining the execution, similar tests can be omitted and the tests can be made more efficient.

[0082] Next, among the test matrices created by the above-described procedure, the user manually performs a test for V or one of them, and if the test matrices belonging to the same group are similar, the test is performed. The procedure and test results will be explained with reference to Fig. 15-1, Fig. 15-2, and Fig. 16-1 to Fig. 16-10. FIG. 15-1 is a flowchart for explaining the flow of processing for creating the test procedure table when the user manually executes the test of the sequence program block in the peripheral device 1 of the PLC. FIG. 15-2 is a flowchart for explaining the flow of processing for applying the test procedure table created by the peripheral device 1 of the PLC to other test matrix tables.

[0083] In the following example, when the user executes a test of any one of the correction portions of the sequence program, the test procedure and the test result are stored and belong to the same program block table. The procedure until application to the test of a similar test matrix is explained. FIG. 16-1 shows the sequence program data 250 in a state where the creation of the test matrix described above is completed. The sequence program data 250 shown in FIG. 16-1 includes a diversion source sequence program portion 251 and a diverted sequence program portion 252 used when the sequence program data 250 is created. Here, with respect to the program block 251 and the program block 252 in the sequence program data 250, the creation of the test matrix is completed by the above method. Figure 16-2 shows the test matrix 253 created by the method described above.

Hereinafter, a description will be given along the flow of processing. First, the user manually tests the sequence program portion 251 in the sequence program data 250 using the test matrix 253.

[0086] In order to select the sequence program part 251 as the sequence program part to be tested from the modified sequence program data 250 and start the desired test, the user uses the input device 2 to start the test start instruction information and data selection. Input the instruction information to the peripheral device 1 of the PLC. When the peripheral device 1 of the PLC receives the above-mentioned test start instruction information 'data selection instruction information (step S61), it executes test processing and test recording start according to the instruction information (step S62).

[0087] Next, the user switches the operation of the device under test (turns on or off). The switching instruction information is input to the peripheral device 1 of the PLC using the input device 2. Here, for example, the sequence program part 251 to be tested is switched to the address part 264 represented by the ladder program 263 as shown in Fig. 16-3. Input to device 1. The peripheral device 1 of the PLC receives the switching instruction information (step S63) and turns on the address portion 264 (“X2”) according to the instruction information (step S64).

[0088] Next, the peripheral device 1 of the PLC is a device instructed to switch operation by the user.

Acquire information on the corresponding No. (address part) and device status (address status) (step S65). Then, the peripheral device 1 of the PLC inputs the address number 274 in the test procedure table 256 as shown in Fig. 16-4, with the address portion 264 "X2" corresponding to the address 276 in the test matrix 253. Add a value in column 260. Here, you Since the address “X2” instructed by the user is in the column of the address number “3” of the test matrix 253, “3” is added to the address number input field 260 of the test procedure table 256. Since the device “X2” is turned ON !, “1” is added to the address status input field 261.

[0089] Next, the peripheral device 1 of the PLC searches for and determines whether or not the force exists in the address portion 275 of the sequence force test matrix 253 that is the same as the state of the address portion 271 of the sequence program portion 263 (step S66). If the same state as the address 271 in the sequence program part 263 is found in the address part 275 of the test matrix 253 (Yes in step S66), 254 (in this case the address is shown) as shown in Figure 16-5. In the state of “Y1” of 254), the value of the address part 266 of the sequence program part 263 is set in the input field 268 of the output result of the test matrix 267 (step S67), and the process proceeds to the next step, step S68.

On the other hand, if the same state as the address 271 of the sequence program part 263 is not found in the address part 275 of the test matrix 253 (No at Step S66), the process proceeds to the next step, Step S68.

Next, the peripheral device 1 of the PLC determines whether or not there is a next test candidate, that is, whether or not the next switching instruction information has been received (step S68). If there is the next test candidate, that is, if the next switching instruction information is received (Yes at step S68), the process returns to step S63.

[0092] If there is no next test candidate, that is, the next switching instruction information is not received! In this case (No at Step S68), the peripheral device 1 of the PLC displays the test matrix 267 on the display device 3. The user can visually check the output result 268 of the test matrix 267 for which the test has been completed, and determine whether or not there is a problem with the test result.

[0093] Here, if there is a problem with the test result, the test procedure and the test result described above cannot be applied, so the user uses the input device 2 to send the test end instruction information to the periphery of the PLC. Input to device 1. The peripheral device 1 of the PLC checks whether it has received the end instruction information (step S69). When the peripheral device 1 of the PLC receives the end instruction information (Yes at step S69), the series of processing ends according to the end instruction information.

[0094] On the other hand, if there is no problem in the test result, the user is informed that there is no problem in the test result. Enter the instruction information to set in the test result input field 270 of the test matrix 267. The peripheral device 1 of the PLC sets information indicating that there is no problem in the test result in accordance with the instruction information in the column of the test result input field 270 of the test matrix 267 as shown in Fig. 16-5. In Fig. 16-5, if there is no problem in the test result, enter a “○” mark.

Then, the peripheral device 1 of the PLC starts applying the above-described test procedure and test results to the test matrix of the sequence program part 252 shown in FIG. 16-1, which has a similar test matrix. Figure 16-6 shows the test matrix 285 of the sequence program part 252.

[0096] The peripheral device 1 of the PLC reads the data 281 of the address number and address state of the test procedure table 280 for the sequence program part 251 as shown in Fig. 16-7 one column at a time. Next, the peripheral device 1 of the PLC also reads the field corresponding to the instruction Z address in the test matrix 285 shown in Figure 16-6 for the address corresponding to the address number of the read data 281.

Next, the peripheral device 1 of the PLC reads from the test procedure table 280 first to the address read from the test matrix 285 in the ladder display 282 of the sequence program part 252 shown in FIG. 16-8. Set the value of the address status of the data 281 (Step S70).

In this example, the peripheral device 1 of the PLC first reads the address number “3” and the address state “1” as the data 28 1 of the address number and the address state. Next, the peripheral device 1 of the PLC reads the address number “X200” corresponding to the address number “3” of the read data 281 and reads the command Z address field of the test matrix 285. Then, the peripheral device 1 of the PLC reads the data previously read from the test procedure table 280 into the address “X200” 298 corresponding to the address number “3” read from the test matrix 285 in the ladder program display 282. Set 281 address status value “1”.

[0099] Next, the peripheral device 1 of the PLC searches the address state 299 of the test matrix 285 shown in FIG. 16-6, and the same address state as the state of the address 289 in the sequence program part 282 exists in the test matrix 285. It is determined whether or not the force is to be applied (step S71).

[0100] Here, the same address state is found in address state 299 of test matrix 285. If not (No at step S71), proceed to the next step S73.

[0101] On the other hand, in step S71, if the same address state is found in the address state 299 of the test matrix 285 (in this case, the address state result 286 is the same state) (Yes in step S71), the output Obtain the value of the address part 284 in the ladder display 282 that becomes the corresponding address of the result address 283 (in this case, Y100 of the address 283), set 287 [step S72], and proceed to step S73.

Next, the peripheral device 1 of the PLC determines whether or not the test procedure table 280 has a record of candidates for application of the test result (step S73). If there is a record of candidates for application of test results (Yes at step S73), the process returns to step S70 and the same processing is repeated until there are no records of candidates for application of test results in the test procedure table 280. Thereby, a test matrix to which the test procedure is applied is created.

[0103] If there is no record of candidate application of the test result in step S73 (No in step S73), the process proceeds to step S74, and the peripheral device 1 of the PLC is manually tested by the user. Read the first record of the test result 292 in the test matrix 290 of the test procedure application source shown in 16-9. Then, the peripheral device 1 of the PLC compares this read record with the first record in the test result 294 of the test matrix 291 to which the test procedure is applied as shown in Fig. 16-10. It is determined whether or not there is a certain force (step S74).

[0104] Here, the test matrix 290 to which the test procedure is applied corresponds to the completed test matrix 267 shown in Fig. 16-5. The test matrix 291 to which the test procedure is applied corresponds to the test matrix 285 of the sequence program part 252 shown in FIG. 16-6.

[0105] In step S74, if the first record value of test result 292 of test matrix 290 is the same as the first record value of test result 294 of test matrix 291 (step S74) (Yes), the peripheral device 1 of the PLC sets a result indicating that the test result is correct in the first record of the test result input field 296 (step S75), and proceeds to the next step S76. In Figure 16-8, “○” is entered when the test result is correct.

[0106] In step S74, if the first record value of test result 292 of test matrix 290 is the same as the first record value of test result 294 of test matrix 291 (step S74) (No), proceed directly to the next step S76. [0107] Next, the peripheral device 1 of the PLC determines whether or not there is a candidate for comparison of the next test result (step S76). If the next record of the test result of the test matrix 290 exists (Yes at step S76), the process returns to step S74 and the same processing is repeated until the next record of the test result is completed.

On the other hand, if the next record of the test result of the test matrix 290 does not exist (No at step S76), the test procedure application process is terminated.

As described above, according to the present invention, when a test is performed when a part of a sequence program is duplicated and used in a plurality of locations, the test items for the correction location and the location affected by the correction are stored in the program block table. The test procedure and test results are automatically applied to tests that are similar to those in the same group when the user manually performs a test on one of the automatically generated tests. And the test can be shortened.

[0110] The present invention is characterized in that a diversion source sequence program and a diversion destination sequence program are managed in a group (collectively), and an influence location is displayed and notified to a user for a certain correction. Yes. The group can be created not only when the sequence program is diverted as shown in the above example, but also for the entire sequence program already created or the sequence program part selected by the user. I'll do it.

[0111] In the following, an already created sequence program 3 as shown in FIG.

An example of creating a program block table by scanning the entire 00 will be explained. Figure

17 is a circuit display example of a sequence program that has already been created. Figure 18

17 sequence programs are displayed in list format. FIG. 19 is a flowchart for explaining the flow of processing for creating a program block table in the peripheral device 1 of the PLC.

[0112] First, the user uses the input device 2 to call the program data of the sequence program 300 (310) already created and stored in the program memory 6 in the peripheral device 1 of the PLC and display it on the display device 3. Let

[0113] Next, the user creates a group creation instruction for instructing creation of a group for the entire program. The display information is input to the peripheral device 1 of the PLC using the input device 2 (step S81). Here, by selecting a part of the sequence program opened by the user, it is possible to instruct a part of the sequence program to create a group.

[0114] When the peripheral device 1 of the PLC receives the group creation instruction information (step S81), the peripheral device 1 of the PLC reads the first line of the program (when a part of the sequence program is selected and grouped) The search is started in units of program blocks from the first line of the program selected by the user (step S82). At this time, as shown in FIG. 20-1, the program block table 220 is empty because no data is inputted.

Next, the peripheral device 1 of the PLC creates a program block table identifier from the first program block 211 as shown in FIG. 18 (step S83). Here, the identifier “LD—OR-AND-OUT J” is created.

Next, the peripheral device 1 of the PLC scans the program block table 220 and searches whether the created identifier is registered (step S84).

[0117] If the created identifier is not registered in the program block table 220 (No at step S84), the PLC peripheral device 1 creates a new record and registers it in the program block table 220 (step S85). In this example, since the identifier “LD—OR—AND-OUT J is not registered in the program block table, the peripheral device 1 of the PLC creates a new record 222 and registers it in the program block table 220. New record Figure 20-2 shows the program block table 221 with 222 registered.

[0118] If the created identifier has already been created in the program block table in step S84 (Yes in step S84), the peripheral device 1 of the PLC records the record having the corresponding identifier in the program block table. A step number is additionally registered in the start step number (step S86).

[0119] Next, the peripheral device 1 of the PLC checks whether the next program block exists (step S87). If the next program block exists (Yes at step S87), the peripheral device 1 of the PLC returns to step S83 to perform processing.

In the case of this example, since the next program block 212 exists, the process returns to step S83 to create the program block identifier “LD-OUT”. Where the identifier “LD—OU Since TJ does not exist in the program block table, a new record 224 is created and registered in the program block table 222. The program block table 223 with the new record 224 registered is shown in Figure 20-3.

[0121] Then, the peripheral device 1 of the PLC scans all the program blocks and repeats the same processing until there are no new program blocks. In this example, the same processing is repeated for the next program blocks 213, 214, 215 and 216. In the processing for program blocks 213 and 214, a step number is additionally registered in the start step number of the record having the corresponding identifier in the program block table. In the process for program block 215, a new record is created and registered in the program block table.

On the other hand, returning to step S87, if the next program block does not exist (No at step S87), the grouping is completed and the process ends. That is, when all the program blocks are scanned and the next program block does not exist, the program block table in which the sequence programs are grouped is completed. In this example,

A program block table 225 as shown in 020-4 is completed.

[0123] As described above, the whole (or part) of the sequence program can be grouped and stored in a simple program block table. Then, when the program block table created in this way is copied as a part of the sequence program and used in multiple places as described above, the peripheral device 1 of the PLC can display it on the display device 3. .

Thus, when a sequence program belonging to the same group is modified, the affected part can be easily determined by this program block table, and the user can be prompted to confirm the modification. Therefore, the correction can be easily applied to all or some of the affected areas belonging to the same group.

[0125] Furthermore, since the group can be created for all or part of the existing sequence program, an accurate sequence program can be created that is efficient and has no omissions.

Note that the processing in the peripheral device 1 of the PLC as described above is executed under the control of the control unit 8 in accordance with the program stored in the program memory 6. Industrial applicability

As described above, the programmable logic controller peripheral device according to the present invention is useful when creating, editing, and testing a sequence program.

Claims

The scope of the claims

[1] A PLC peripheral device that can create part of a sequence program by using part of a sequence program.

A program block table in which an identifier characterizing the sequence program part is associated with a used part of the sequence program part from the diversion source sequence program part and the diversion source sequence program part created by diverting the diversion source sequence program part A program block table creating means for creating

When a part of the sequence program part is corrected, it is determined whether or not the corrected part is a part of the sequence program part registered in the program block table. Influence location data creating means for creating impact location data indicating the impact location affected by the modification based on the program block table;

PLC peripheral device characterized by comprising:

[2] Amendment to apply the amendment to the affected area included in the affected area data Automatically based on the sequence program part of the diversion destination corresponding to the affected area included in the affected area data based on the application information A means for applying corrections to apply corrections

The PLC peripheral device according to claim 1, wherein:

[3] In accordance with the program block table creation instruction to create a program block table corresponding to all or part of the existing sequence program, the existing program block table creation means for creating the program block table for the existing program is omitted. thing

The PLC peripheral device according to claim 1, wherein:

[4] The existing program block table creation means The whole or part of the sequence program is scanned, and the sequence program parts having the same or the same circuit structure are extracted and grouped

4. The PLC peripheral device according to claim 3, wherein the peripheral device is a PLC.

[5] A test matrix for performing a test on the corrected part and the affected part. 2. The PLC peripheral device according to claim 1, further comprising test matrix creating means for creating the program block table force.

[6] The test result for the affected part can be omitted by applying the test result of the modified part using the test matrix to the test for the affected part. PLC peripheral device described in 1.

[7] Same program block table power The test procedure and test results of the test matrix that has been tested among the created test matrices can be applied to all test matrices of the same program block table.

6. The PLC peripheral device according to claim 5, wherein:

[8] Sending the affected part data to a display device and displaying it on the display device

The PLC peripheral device according to claim 1, wherein: