JPH03105504A - Programmable controller - Google Patents

Abstract

PURPOSE:To program a pair of reciprocal actions with a single instruction by carrying out alternatively the primary and secondary actions. CONSTITUTION:A dual instruction storage means contains a contact designating part, a data designating part, a two-dimensional process contents designating part, and an output goal designating part and stores the instructions. The dual instruction executing means decides whether the designated contacts are kept ON or OFF and output the designated data to the designated output goals based on the result of said decision and the primary process contents designated by the dual process contents designating part or carry out the secondary processes designated by the dual process contents designating part. Then the primary of secondary process contents are corresponding to the ON state of the contact with the other contents corresponding to the OFF state respectively. Thus the corresponding process is carried out in accordance with the ON or OFF state of the contact. Thus it is possible to obtain a programmable controller which can program two reciprocating actions with a single instruction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a programmable controller, and more particularly to a programmable controller that allows two contradictory operations to be programmed with one command.

[Prior Art] In a programmable controller, for example, the operation of displaying a numerical value on a display and the operation of clearing the display are mutually contradictory operations.

Such reciprocal operations mean that when a contact is on, it performs one operation, and when it is off, it performs the other operation.
Often programmed in pairs.

That is, in an example of a conventional programmable controller, this is programmed as shown in FIG.

The first command in FIG. 9 represents the operation shown in FIG. 10, and when the specified contact (X n ) is on, the data of the device specified by the source (S) is transferred to the destination (D). Transfer to the specified device. Nothing is done when the contact (X n ) is off. Also, the 9th
The second instruction in the figure represents the operation shown in FIG. That is, when the specified contact (Xn) is on,
Transfer constant (K) to the device specified by destination (D). Nothing is done when the contact (Xn) is off.

Here, if we specify the data memory that stores the data to be displayed as the source (S), specify the display as the destination (D), and set the constant (K) to 10, the contact point (X n ) will be When the contact (X n ) is on, data will be displayed on the display, and when the contact (X n ) is off, the display will be cleared.

[Problems to be Solved by the Invention] As described above, in the conventional programmable controller, two contradictory operations are programmed using two instructions.

However, since two contradictory operations are frequently used bare, programming with two instructions each time requires duplication of effort, and there is a problem that the operation becomes unnecessarily complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a programmable controller that allows two contradictory operations to be programmed with one instruction.

[Means for Solving the Problems] A programmable controller of the present invention includes a binary instruction storage means for storing an instruction having a contact specifying section, a data specifying section, a binary processing content specifying section, and an output destination specifying section. , determine whether the contact specified by the contact specifying section is on or off, and depending on the judgment result, transmit the data specified by the data specifying section to the main data specified by the binary processing content specifying section. The method may further include dual command execution means for outputting to the output destination specified by the output destination designation section or performing supplementary processing specified by the binary processing content designation section according to the processing content. It has the above characteristics.

[Operation] In the programmable controller of the present invention, two operations, the main processing content and the supplementary processing content, can be specified as dual commands.

Then, one of the main processing content and the supplementary processing content corresponds to the on state of the contact, and the other corresponds to the off state, and the corresponding processing is executed depending on the on state or the off state of the contact.

In this way, since the two main and complementary actions can be executed alternatively, a pair of two reciprocal actions can be programmed with a single instruction, making it possible to avoid the conventional complexity. Become.

[Example] Hereinafter, the present invention will be described in more detail based on the example shown in the drawings. Note that this invention is not limited to this.

FIG. 3 shows the appearance of a programmable controller (1) according to an embodiment of the present invention.

A panel on which many keys (10) and a display (20) are arranged is installed on the front, and terminals (30) for connecting external devices are provided on both sides.

The panel keys (10) include a dual command key (11) according to the invention as shown in FIG.

FIG. 5 is a block diagram showing the system configuration of the programmable controller (1), where (40) is the CPU, (40)
1) is a device memory that stores whether each of a large number of contacts is in an on state or an off state, (42) is a data memory that stores numerical data, and (43) is a user memory that stores a program manually written by the user. Program memory, (4
4) is a system program memory that stores a system program for controlling the basic operations of the programmable controller (1), and (45) is a human output interface for connecting with external equipment.

Now, by operating the key (11) shown in FIG. 4, the commands shown in FIG.
43).

The command shown in Figure 2 specifies a contact (Xn), and if the contact (Xn) is on, transfers the data specified by the source (S) to the device specified by the destination (D). The main action of
is off, set the constant O to the destination (D
) is a binary instruction that specifies two complementary operations: transfer to the device specified by .

That is, the CPU (40) retrieves the instructions stored in the user program memory (43) according to the system program in the system program memory (44), and if the instructions are the instructions shown in FIG. 2, the CPU (40) reads the instructions shown in FIG. It works like this.

First, it is determined whether the specified contact (X n ) is on or off (PL), and if the judgment result is on, the data in the data memory (42) specified by the source (S) is retrieved and the destination Transfer to the device specified by the nation (D) (P2). On the other hand, if the determination result is an OFF state, the constant O is transferred to the device specified by the destination (D) (P3).

Therefore, the numerical data to be displayed is stored in the data memory (42).
, specify the numerical data as source (S),
When the display (20) is specified as the destination (D), numerical data will be displayed on the display (20) when the contact (Xn) is on, and the display will be cleared when the contact (Xn) is off. It becomes like this.

As can be understood from the above explanation, this programmable controller (1) allows, for example, the operation of displaying numerical values on the display and the operation of clearing the display to be programmed with one command as shown in Fig. 2. Become.

Other embodiments include those having the instructions shown in FIGS. 6-8.

First, the main operation of the command in Figure 6 is to convert the binary data specified by the source (S) into BCD data and set it in the device specified by the destination (D). The content is to transfer a predetermined constant O to a device specified by a destination (D). This command applies to data memory (42
) is useful for programming the operation of sending and displaying numerical data stored in a predetermined location using a BCD code, and the operation of clearing the display.

Next, the command in Figure 7 has the main operation of converting the BCD data specified by the source (S) into binary data and setting it in the device specified by the destination (D). is the content of transferring a predetermined constant O to the device specified by the destination (D). This command is useful for programming the operation of reading the BCD code of a digital switch (not shown) and storing it as pinary data in a predetermined location of the data memo IJ (42), and the operation of clearing the predetermined location. be.

Next, in the command shown in Figure 8, the main operation is to convert alphanumeric characters L into ASCII code and set it in the device specified by the destination (D), and the supplementary operation is to convert the alphanumeric character L into ASCII code and set it in the device specified by the destination (D), and the supplementary operation is to convert the alphanumeric character L into ASCII code and set it in the device specified by the destination (D). The content is to transfer the code to the device specified by the destination (D). This command programs an operation to send and display the numerical data stored in a predetermined location in the data memory (42) using an ASCII code, and an operation to clear the display for an ASCII code/space subless type display. It is useful for

[Effects of the Invention] According to the present invention, two operations, main processing and supplementary processing, can be programmed with one instruction. Therefore, it becomes very easy to write a program in which two contradictory actions repeatedly occur.

Furthermore, since the two processes are executed alternatively, mutual interlock can be ensured.

[Brief explanation of drawings]

FIG. 1 is a flowchart of essential parts of the operation of a programmable controller according to an embodiment of the present invention, FIG. 2 is a ladder diagram showing the operation shown in FIG. 1, and FIG. FIG. FIG. 9 is a ladder diagram showing the instructions according to the invention, FIG. 9 is a conventional ladder diagram corresponding to the ladder diagram shown in FIG. 2, and FIGS. 10 and 1 are flowcharts showing the operation of the transfer command. In the figure, (1) is a programmable controller, (
10) is a panel key, (11) is a binary command input key,
(20) is a display. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A binary instruction storage means for storing an instruction having a contact specifying section, a data specifying section, a binary processing content specifying section, and an output destination specifying section, and whether the contact specified by the contact specifying section is in an on state. Determine whether it is in the off state, and according to the determination result, output the data specified by the data specification section according to the main processing content specified by the binary processing content specification section, specified by the output destination specification section. A programmable controller characterized by comprising binary instruction execution means that outputs first or performs complementary processing specified by the binary processing content designation section.