JPS6365967B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program device for a sequence controller, and in particular to a sequence controller that can prevent input operation errors when entering a symbol key corresponding to a circuit element of a relay ladder circuit by looking at a relay ladder circuit diagram. Concerning a program loading device.

Recent advances in the technical field of sequence controllers have been remarkable, especially in the field of creating sequence programs. It has reached the point where the programming work involving the operator is virtually completed simply by pressing the button to display the ladder circuit itself on the CRT screen. This is because a program loader with a CRT cannot load the sequence program displayed on the CRT.
When storing data into the sequence controller's RAM memory (formed of C-MOS, etc. for storing sequence programs), a compiler is provided, which is a program for converting it to the machine language level. This is because the compilation work is done automatically.

Therefore, in the series of program creation processes as described above, it is during the symbol key input operation that the operator is likely to make an operational error. However, in the current key input operation, the operator only presses a symbol key on the program loader device while looking at the relay ladder circuit diagram, or when operating the cursor control keys, the cursor control program is activated at the same time. (In this case, for example, the cursor moves one by one from the left end to the right end of each row of the ladder circuit, and each time a key input is given, the cursor moves forward to specify the next position to be programmed. ) But in the end, the next symbol key to press is selected by the operator by reading the ladder circuit diagram.

Therefore, there is still a high possibility that a key input operation error will occur.

The present invention is intended to significantly improve the above-mentioned problems, and its purpose is to utilize the periodicity of the circuit configuration inherent in the sequence ladder circuit itself or the repetitive nature of similar circuit elements. Among the many symbol key groups provided on the loader device, a display means is provided to distinguish the keys or key groups that may be pressed next for program operation. It is something.

By doing this, the operator pays attention only to the key or key group with the above indication and selects from that key or key group the symbol key corresponding to the next circuit element on the ladder circuit diagram to be programmed. All you have to do is input it.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an outline drawing of a CRT-equipped program loader device 12 connected to a sequence controller 11 by a cable 13, where 12A is a CRT
The display screen 12B shows a memory device including a magnetic cassette tape CMT in which the sequence program programmed by the loader device 12 is stored.

12C is a panel section for key operation, and details of each key are shown in FIG.

14 is a dedicated connection cable between the key operation panel 12C and the CRT 12A.

FIG. 2 1 explains the format corresponding to the relay ladder circuit for one program block displayed on the screen of the CRT 12A shown in FIG. In each row, the first to eighth columns are input sections (i/O), and the ninth column of the first row is an output section.

FIG. 2 is a diagram illustrating the periodicity of the above-mentioned ladder circuit used in the present invention. In the figure, each row of the input section of the ladder circuit is expressed as Δ
It is assumed that the branch portions B1, B2, .

Now the program operation by key input is on line L1,L.
2, . . . are performed sequentially for each row. On the CRT screen, at the start point, use the cursor control keys to move the cursor k (L1,
It is assumed that it is located directly below the Δ mark in B1).
This is the branch B1, then move the cursor k to the right by 1
If the step is moved, the contact portion C1 will be designated. Below, the branch part → contact part is repeated one after another like B2, C2, ......C8, B9, and B9
When this point is reached, the next step is the output section 9, and the program operation for the first line is completed. The process then proceeds to the second line L2. In this case, the ladder circuit diagram you want to program may be, for example, on L1, where C1 and C2 have a contact, and B3 to B9 are simply connected by a connecting wire. Press the line symbol key (Q in Figure 3).

I explained a relatively simple example above, but in short, in terms of what symbol key to input at the position specified by the cursor, at least if the previous point is a contact point, the next point is a branch point, and in the middle of a branch point. Even when inputting one of the following, the types of symbol keys are more limited when the cursor is at B2 and B9 than when the cursor is at B1 or B9 of each line or between B2 and B8. Similarly line (L11)
Or, if the program block specifies that it is the last line, each branch does not have a branch extending downward, so it is simply a key for a connecting line to the right, or a branch key with a branch extending upward. limited to.

In other words, since various limiting conditions are given to the selection of input keys for the cursor position [(Li, Cj) or (Li, Bj)] on one ladder circuit, only symbol keys that meet these conditions are selected. To distinguish it from other symbol keys, the operator only has to select the symbol key that matches the circuit element on the ladder circuit from among the symbol keys that meet the conditions. In the present invention, based on this idea, some symbol keys that meet the conditions can be distinguished from other keys by lighting lamps or the like.

Although it was omitted in the above explanation, when you press the symbol key for a contact, for example, on one contact, the cursor does not immediately go to the branching part (on the right), but it prompts you to input the I/O number of that a contact. Once you move above the contact and enter that number using the numeric keys, you will move to the next branch mentioned above. In addition, in the above example, the program order is shown in which the corresponding circuit elements are input sequentially from left to right for each row of the ladder circuit using the symbol key, but in this case the cursor automatically moves to the next one. (Key input) It is assumed that the command will be moved to the position where the command is to be given. However, the present invention is also applicable to a case where the operator moves the cursor k to any CRT screen using the control keys and inputs a symbol key at that position. In other words, the coordinate position of cursor k on the CRT screen is constantly monitored by a counter during program operation.

Figure 3 is a diagram of the panel operation surface on which the keys of the CRT-equipped loader device are arranged. , a group of keys used for stopping.

The leftmost MOMAL in the control section 22
The SCAN key is used to return from I/O SCAN during circuit creation.

The next I/O SCAN key limits cursor operation to the I/O section during circuit creation. Use the CLUM INST key to expand the column when you want to insert a column while creating a circuit.

Similarly, if you want to insert a line, use the LINE INST key to increase the line spacing.

Press the NOMALIZE key while creating a circuit or if you want to see the normalized circuit after creating a sequence circuit.

The INST key in the control unit 23 is used in circuit change mode to add a circuit element to the middle of an already programmed sequence circuit.

The CALL key is used to call a registered standard circuit.

The SET key is used when writing from the load device to the memory of the sequence controller PC.

The DEL key is used in circuit change mode to delete one block from an already programmed sequence circuit.

The COMP key means the end of processing, exits from the current mode, and is used to return to the initial state.

In the control unit 33, the TAB LF key moves the cursor to the next line where a branch appears during circuit creation.

While creating a circuit, the CR key moves the cursor to the bus line of the next line where the cursor is currently located. The ↑ key moves the cursor back one line when moving the cursor.

The ↓ key advances the cursor one line.

→ key advances the cursor by one point.

The ← key moves the cursor back one point.

→ → key advances the cursor one column.

← The ← key moves the cursor back one column.

In the relay section 30, the I/O key is pressed for external input/output, which is an input signal from the outside via an input, output, or module, or an output signal to the outside.

The R key is a dummy and is an auxiliary relay that sends and receives signals only within the PC.

The L key is a latch and sends and receives signals only within the PC.

The TON key is a timer-on relay.

The RTO key is an integration timer, CTU key is up counter, CTD is a down counter.

If you want to erase the figure on the CRT screen, align the SP key in the space section 32 with the key at a designated location and press this key.

31 is a numerical part. 25 is a general purpose arithmetic unit.

→The key is the put command (puts the contents of the A register into the specified address), the MAC key is for macro command selection, 24 is the program end section, and the (PED key) indicates the end of sequence circuit creation. 26 is the constant part (CONST key), which is used when setting constants.

Reference numeral 27 denotes a contact part, which is a key for an a contact and a b contact from the top. These are the relay section, 30 I/Os, R,
Used as L, TON, RTO, CTU, and CTD contacts (A contacts).

Reference numeral 28 denotes a branching section in which nine types of branching keys are provided.

29 is an output section, and the upper key is for outputting I/O, R, and L of the relay section 30.
The lower key is used to output each set of TON, RTO, CTU, and CTD of the relay section 30.
This is for reset output of CTU and CTD. In the same figure, 21, 22, 23, 24, 25, 26, 27, 2
A display section indicated by a circle is provided on each key of each section 8, 29, 30, 31, and 32.

FIG. 4 is a diagram of one relay ladder circuit. The lower part of the figure shows a diagram in which the upper ladder circuit is decomposed into circuit elements corresponding to symbol keys.

The procedure for programming the circuit diagram of FIG. 4 and the process of symbol key selection during the process are shown in a chart form in FIG. In the figure, at step STP1, the lamps of the two branch keys are lit. Looking at Figure 4, which is the ladder circuit diagram to be programmed, it can be seen that there is a branch to X1 at first, so the operator presses the key indicated by STP2 (OP). then
Move to STP3, and key lamps for two contacts and one connection line will be displayed.

Therefore, the operator (OP) is STP4 and X1 is a.
Since it is a contact, press the a contact key. then
In STP5, R, X, and Y light up to designate the type of the input a contact. X at STP6
Press the key. Then the numeric keys light up (STP
7) Therefore, press 1 in X1 (STP8). By proceeding to STP48 in the same manner, the operator completes the key input operation for converting the ladder circuit shown in FIG. 4 into a sequence program. In FIG. 3, the X and Y keys are actually I/O keys, and the X and Y keys are automatically distinguished by the count value of the cursor.

FIG. 6 is a flowchart illustrating the main part of a program for specifying a symbol key to turn on the light, of which only the main part is shown in a simple example in FIG.

As can be seen from the figure, the lamp lighting display steps ST9, ST15, ST17, ST1 are surrounded by thick lines.
9, ST21, ST23, ST25, ST27, ST
29, and ST31 are distributed into several lighting groups according to the current position kij of the cursor, so that the operation for selecting the symbol key to be pressed is simplified for the operator, and operation errors can be reduced.

As explained above, in the present invention, each of the symbol keys of the CRT-equipped loader device is provided with lighting display means such as a lamp, and only the lit keys are selected, so that key input operations can be performed easily. This reduces operator errors, and for this purpose, the current position of the cursor on the CRT screen is determined by the periodicity of the relay ladder circuit itself.
In order to correlate with the regularity, a lighting display key designation program as shown in FIG. 6 is run in parallel with the movement of the cursor used during program operation.

[Brief explanation of drawings]

Figure 1 is an external view of the sequence controller and program loader device with CRT, Figure 2 1 is the CRT
Figure 2 is a diagram explaining the programmable area on the screen. Figure 2 is a diagram explaining the periodicity and regularity of the ladder circuit used in the present invention. Figure 3 is a detailed diagram of the key input operation panel including a group of symbol keys. , Fig. 4 is a ladder circuit diagram for one block, Fig. 5 is a flowchart explaining the symbol key operation steps when programming the circuit diagram of Fig. 4, and Fig. 6 is a diagram of symbols in relation to the cursor position. 1 is a flowchart showing the main steps of a program used in the present invention to select a key. 11...Sequence controller, 12...CRT
Includes program loader, 13, 14...cable.

Claims (1)

[Scope of Claims] 1. In a sequence programming device that displays a relay ladder circuit diagram on a screen using a group of input keys including symbol keys corresponding to each circuit element of the relay ladder circuit diagram, cursor position (kij)
is input at the cursor position in relation to the row and column sizes of the display screen for one sequence program block and the arrangement status of the input area and output area, which are made up of branches and contact areas, on the display screen. A key selection program is provided for specifying a key or a key group that has a possibility of being selected, and the input key group includes at least the same key selected and specified for each of the symbol keys therein based on instructions of the selection program. An inductive programming device characterized by comprising a display means for displaying information.