JPS648361B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a programming device that supports the work of creating a control program for performing sequence control of a plant. The present invention relates to a programming device that displays a display on a display unit constituting a machine interface using a logic circuit diagram.

[Prior art]

Many conventional programming devices display ladder sequence circuit diagrams (i.e., relay sequence control circuit diagrams) on the display, which makes it easy for people who are familiar with relay control circuits to program. Since it is assumed that logic circuits (AND circuits, OR circuits, etc.)
The drawback was that it was difficult to use for people who were accustomed to using it. In addition, some conventional programming devices display logic circuit diagrams on the display, but in such conventional devices, when the logic circuit diagram for configuring sequence instructions is displayed, the entire screen is displayed. It had the disadvantage that it was difficult to use because the line was downward to the right, and there were restrictions such as crossing connection lines.

[Summary of the invention]

The present invention was made to eliminate the above-mentioned drawbacks of conventional programming devices.The device of the present invention uses a matrix of vertical and horizontal lines on the display screen to determine input wire numbers and intermediate numbers of logic circuits. Wire numbers and logical symbols are represented on the horizontal lines, connection lines and branch lines are represented on the vertical and horizontal lines, and a row number register corresponding to each horizontal line is used.
A logic circuit diagram is created on the premise that a register (hereinafter abbreviated as RN, where RN(i) represents a row number register corresponding to the i-th row) and a register corresponding to each wire number are provided. Key input information input by operating the keys on the key input section is input in the form of a code (character code, graphic code, etc.) and is stored in the form of a code.The display section reads out this code and displays each The characters and figures corresponding to the code are converted into dot patterns and displayed as a logic circuit diagram on a raster scan cathode ray tube display. On the other hand,
A sequence command is created from this key input information. The key input information corresponding to the wire number and RN of the logic circuit diagram becomes the parameters of the input instructions, branch instructions, logic instructions, and output instructions that make up the sequence instruction, and corresponds to the key input information displayed as the logic circuit diagram. A sequence instruction is created.

The order of vertical lines on the display screen from left to right is represented by column numbers, and the order of horizontal lines from top to bottom is represented by row numbers. Columns with the same number contain input instructions and branch instructions. , operate the key input section so that the logic circuit part corresponding to only one type of instruction among logic instructions and output instructions is displayed, and move in the direction of increasing column number (input instruction) → (branch instruction) → Arrange in the order of (logical instructions) → (output instructions).

The device of the present invention includes a circuit portion that converts key input information into sequence control instructions, and
Equipped with a circuit section that converts sequence control commands into key input information, reads out sequence control commands in the storage device, converts them into key input information, and displays this as a logic circuit diagram on the display, making it easy to modify programs. I have to.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, in which 1 is a key input section, 2 is a key input storage section, 3 is a display section, 4 is a key input to sequence command conversion section, and 5 is a sequence command. The storage unit 6 is a sequence command→key input conversion unit. FIG. 2 is an explanatory diagram showing the key arrangement of the key input unit 1 shown in FIG. 1, in which 21 is a shift key, 22 is an enter key, and 23
is a numeric keypad for inputting numbers, 24 is a character key for inputting wire number type, 25 is a branch key for inputting branch column information, 26 is a logic key for inputting logical symbols, 261 is an AND key, 262 is an OR key, 26
3 is a not key. A flip-flop, N/M logic, etc. in a logic circuit can be assigned to a blank key among the logic keys 26.

FIG. 3 shows an example of a logic circuit diagram displayed on the display unit 3. In the figure, 30 is a portion added for explanation of column allocation, and this portion 30 is not displayed on the display screen. Further, 31 is an RN corresponding to each row number, which does not require input from the key input section 1, is stored in the key input storage section 2, and is always displayed on the display section 3. In the example shown in FIG. 3, the row numbers are 1 to 16, the column numbers are 1 to 16, and
Column No. 1 and No. 2 are for RN, Column No. 3 and No. 4 are for input, Column No. 5 and No. 6 are for branch, Column No.
7. No. 8 shows an example where it is used in logic.

The operation in the key input section 1 is as follows: shift key 21
, position the cursor on the display screen of the display unit 3 at the position where the character or symbol should be input, and operate the key corresponding to the character or symbol to be input, the code corresponding to that key will be displayed on the key. Characters and figures corresponding to the input keys input to the input storage section 2 and operated are displayed on the display section 3. When the enter key 22 is operated after the logic circuit diagram shown in FIG. are arranged and stored in the key input storage unit 2, and the operation of the key input→sequence command conversion unit 4 is started.

FIG. 4 is a diagram showing the correspondence between instructions, symbols and functions of a logic circuit diagram used in an embodiment of the present invention. In Figure 4, m-r, m-p, m, m+p, m+
q, m+r, etc. indicate row numbers; (a) IN({ ^Ii _Mi }/m): Store the contents stored in Ii or Mi in RN(m).

(b) AND (m, m+p, ......m+r/m+q/
Mi): RN (m), RN (m+p), ......, RN
The logical product of (m+r) is stored in RN(m+q), and if Mi exists, it is also stored in Mi.

(c) OR (m, m+p, ......, m+r/m+
q/Mi): RN(m), RN(m+p),......
The logical sum of RN(m+r) is stored in RN(m+q), and if Mi exists, it is also stored in Mi.

(d) NOT (m/Mi): A signal obtained by inverting the logic of RN(m) is stored in RN(m), and if Mi exists, it is also stored in Mi.

(E) BD1 (m/m+p, ……, m+r) and
BD2 (m/m+p,......, m+r): RN(m)
The contents stored in RN(m+p),...
..., stored in RN(m+r).

(f) BU1 (m/m-r,......, m-p), and
BU2 (m/m-r, ……, m-p): RN (m)
The contents stored in RN(m-r),...
..., stored in RN(m-p).

(g) BUD (m/m-r,......, m-p, m, m
+p,......m+r): The contents stored in RN(m) are converted to RN(m-r),......,RN(m-
p), RN(m), RN(m+p), ......, RN(m
+q).

(H) OUT (m/{ ^Oi _Mi }): Stores the contents stored in RN (m) in Oi or Mi.

It means a command such as

The key input → sequence command conversion unit 4 and the sequence command → key input conversion unit 6 store the contents of FIG. 4 as codes corresponding to each part of the logic circuit diagram and codes corresponding to each part of the instruction. The key input→sequence command conversion unit 4 converts the contents of the key input storage unit 2 into sequence commands and stores them in the sequence command storage unit 5. This conversion is performed for each part of the logic circuit diagram displayed on the display section 3 in a predetermined order.

FIG. 5 is a diagram showing the order in which the contents of the key input storage unit 2 are converted into sequence commands in the embodiment of the present invention, starting from the first row of the leftmost column (excluding the column displaying RN) as shown in the figure. m in order
When you reach the row, switch to the first row of the next column.
The m rows are sequentially reached from the first row of the next column. For example, if this leftmost column displays a display representing the leftmost input instruction in Figure 3, the sequence instructions generated by conversion are IN (I1/1),
IN (I2/2), IN (M1/6), IN (M2/7), IN
(I3/8), IN (M3/10), IN (I4/14), IN
(M4/15), IN (M5/16), and the next column branch instructions are BD2 (1/4), BD2 (8/9),
BU2 (14/11), BD2 (2/5), BU2 (15/12). The conversion order in the sequence command→key input conversion section 6 also follows the order shown in FIG.

As described above, operate the key input section 1,
When a logic circuit diagram as shown in FIG. 3 is displayed on the display unit 3, a code corresponding to this display is stored in the key input storage unit 2, and a sequence command corresponding to the displayed logic circuit diagram is stored in the sequence command memory. Part 5
will be memorized.

Further, the sequence command stored in the sequence command storage unit 5 is converted into a code representing characters and figures by the sequence command → key input conversion unit 6, and inputted into the key input storage unit 2, and this is converted into a code in the form of a logic circuit diagram. can be displayed on the display section 3.

In the above description, the maximum number of rows and columns is not limited and can be set arbitrarily within the limit that can be displayed on the display unit 3. Further, a branch instruction in one column can be configured into several sub-columns. Furthermore, in the examples shown in FIGS. 3 and 4, only the AND key 261, the OR key 262, and the NOT key 263 are used as the logic keys 26, but there are also flip-flops, N/N keys in the logic circuit diagrams.
It is also possible to represent M logic, timers, etc., and convert each of these into corresponding sequence instructions.

〔Effect of the invention〕

As described above, according to the present invention, an RN corresponding to each horizontal line is provided, and each sequence command using the wire number and RN as parameters is created in the row order from top to bottom in each column. So,
There are no restrictions on the logic circuit diagram going down to the right or crossing connection lines, and programming can be performed while displaying a logic circuit diagram that matches the actual logic circuit diagram, allowing for highly efficient program creation. be able to.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the key arrangement of the key input section of FIG. 1, and FIG. 3 is an example of a logic circuit diagram displayed on the display section. FIG. 4 is a diagram showing the correspondence between the instructions used in this invention and the symbols of the logic circuit;
FIG. 5 is a diagram showing the order in which the contents of the key input storage section are converted into sequence commands in the embodiment of the present invention. 1... Key input section, 2... Input storage section, 3...
Display section, 4...Key input to sequence command conversion unit, 5...Sequence command storage unit, 6...Sequence command to key input conversion unit, 31...Row number register.

Claims (1)

[Scope of Claims] 1. A programming device for creating a program for sequence control of a plant, comprising: a display unit that displays a logic circuit diagram representing sequence commands; and a logic circuit diagram displayed on the display screen of this display unit. A key input section that outputs a code for a unit part and stores it in the key input storage section at an address position corresponding to the position on the display screen where the unit part is displayed, and a vertical line and a horizontal line that mark the position on the display screen. The code stored in the key input storage section is read out and converted into a dot pattern of the unit part represented by the code, and the wire number (input wire number, intermediate wire number, and an output line number) and a logic symbol on the horizontal line, and a connecting line and a branch line on the vertical line and the horizontal line, at a display position corresponding to an address in the key input storage unit of the code; , From the contents of the key input storage section above, use the wire number and the row number register corresponding to each horizontal line of the logic circuit diagram as parameters, input wire numbers and intermediate wire numbers as input instructions, and connect lines and branch lines as branch instructions. , a key input → sequence command conversion unit that converts logic symbols into logic commands and output wire numbers and intermediate wire numbers into output commands to create sequence commands, and stores the sequence commands in a sequence command storage unit; and the sequence command storage unit. a sequence command→key input conversion unit that inversely converts the sequence command stored in the key input unit into a code output by the key input unit and stores the code in the key input storage unit; In inputting to the input storage section, only the unit parts that are converted to the same type of sequence command are arranged on the same vertical line on the display screen, and in the conversion from the key input to sequence command conversion section, the display section A programming device that corresponds to the display and performs conversion sequentially from top to bottom on the same vertical line, and when the conversion on one vertical line is completed, moves on to the conversion on the vertical line adjacent to the right.