JPH03224001A - Programmable controller system - Google Patents

Abstract

PURPOSE:To detect the misloading of a storage means by storing the comment information when a sequence program is loaded, and collating this loaded comment information with that stored in a loaded storage medium. CONSTITUTION:A programmable controller 2,000 is provided with a storage means 2,100 which reads out the comment information on a display subject and stores it when a sequence program is loaded. At the same time, an identification means 1,100 is provided to perform the collation between the comment information stored in the means 2,100 with that stored in a storage medium 1,300 for decision of coincidence/discordance between both comment information in a display state. Thus, it is possible to evade the display of the wrong comment information despite the misloading of the medium 1,300 when a sequence program is monitored. Then the comment information corresponding to the loaded sequence program is displayed i a correct way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a programmable controller system for automatically controlling electronic equipment.

[Prior Art 1] Conventionally, in a programmable controller system, a programmable controller reads the contact state of an electronic device, performs a Silkens operation, and instructs the electronic device about the contact state to be newly set.

Such processing is executed according to a sequence program. A programming device (programming device) called a loader is connected to the programmable controller, and the above sequence program is created in the programming device.

This sequence program is generally created in the form of a sequence circuit diagram.

The created sequence program is converted from a sequence circuit diagram form into an executable program language of the programmable controller in a programming device or a programmable controller, and is stored in a program memory in the programmable controller for calculation purposes.

Furthermore, when modifying a sequence program, the sequence program is read out to the programming device in the reverse order to that described above.

In recent programmable controller systems, comments for contacts can be added to sequence programs in order to facilitate creation and modification of sequence programs.

The added comments are stored together with the sequence program on a floppy disk installed in the programming device. When displaying (monitoring) the sequence program during system operation on the programming device, the user transfers the sequence program of the programmable controller to the programming device and displays it. At this time, the programming device reads the comment for the specified contact from the floppy disk and displays the comment in the comment display list on the display screen.

[Problem to be solved by the invention 1 However, in the conventional programming device of this type,
When displaying a loading sequence program read from a programmable controller, if a floppy disk with a different comment is inserted by mistake, a different comment will be displayed on the display screen.

[Means for Solving the Problems 1] In order to achieve such an object, the present invention stores a created sequence program and comment information in a storage medium that is removable from a programming device, and stores the created sequence program and comment information in a storage medium that is removable from a programming device. When loading the sequence program into a programmable controller and displaying the loading sequence program on the programming device, in a programmable controller system that reads comment information to be displayed from a storage medium attached to the programming device, At this time, a part of the comment information to be displayed is read out and stored (when a storage means is provided in either the programmable controller or the programming device and the loading sequence program is displayed, the loading sequence program is displayed). By comparing the contents of the comment information of the storage medium and a part of the comment information of the storage means, it is determined whether the installed storage medium is the storage medium from which the loading sequence program was read. An identification means to perform identification judgment, and when the judgment result of the identification means is positive, comment information on the attached storage medium are selected as display targets, and when the judgment result of the identification means is negative, comment information on the storage medium is selected. A special feature characterized in that the programming device is provided with a display control means for selecting information as a display target.In the present invention, when loading a sequence program, part of the comment information is stored in the storage means. When displaying the loading sequence program, the identification means collates the comment information in the storage means with the comment information on the installed storage medium, so that incorrect installation of the storage medium (floppy disk) can be detected.

At this time, since the comment information in the storage means is selected as the comment information, the display of the sequence program will not be hindered.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the basic configuration of an embodiment of the present invention.

The circuit shown in FIG. 1 stores a created sequence program and comment information in a storage medium 1300 that is removable to a programming device 1000, and when displaying the sequence program in the storage medium on the programming device, the programming device 3 shows a programmable controller system that reads comment information to be displayed from an attached storage medium.

A storage means 2100 is provided in either the programmable controller or the programming device. The storage means 2100 reads and stores part of the comment information to be displayed when loading the sequence program.

The programming device is provided with identification means 1100 and display control means 1200.

When displaying the loading sequence program, the identification means 1100 compares the content of the comment information of the attached storage medium with a part of the comment information of the storage means, thereby identifying the attached storage medium. is the storage medium from which the loading sequence program was read.

Display control means 1200 selects the comment information of the attached storage medium as a display target when the judgment result of the identification means is positive, and selects the comment information of the storage medium when the judgment result of the identification means is negative. Select for display.

FIG. 2 shows a circuit configuration of an embodiment of the present invention.

In FIG. 2, programming device 10 is connected to programmable controller 20 by signal cable 11. In FIG. The programming device 10 is composed of the following parts.

The central processing unit (CPU) is a system ROM
The entire device is controlled by executing the system program stored in (read memory) 2.

Operation instructions for the CPUI are input through the keyboard input device 6. Note that the CPUI operates as an identification means and a display control means.

A system RAM (random access memory) 3 temporarily stores information for creating sequence programs and displaying on the display 7.

An input/output interface (Ilo) 5 is located between the CPUI and the programmable controller 20 and performs information transfer processing.

The keyboard input device 6 includes graphic keys for creating sequence programs and control (
Function) keys and character keys for inputting numerical values and alphabetic characters are provided.

The display device 7 displays information transmitted from the old CP.

A floppy disk storage device (FDD) 8 reads/writes information to/from an attached floppy disk (storage medium) 8-1.

Note that the FDD 8 detects attachment of a floppy disk using a microswitch or the like, and sends a signal indicating attachment to the CPUI.

In the programmable controller 20, the sequence program received from the programming device IO via the Ilo 23 is programmed into the R for the user under the operation control of the CPU 21.
It is stored in AM22.

The operation of such a system according to the present invention will be explained with reference to the flowcharts of FIG. 3 and FIG. 4.

In addition, the program area 8- of the floppy disk 8-1
IA stores a sequence program created by a conventional method, and comment area 8-IB stores comments corresponding to contact numbers of the sequence program, as shown in FIG.

When the user instructs loading (startup) of a sequence program from the keyboard input device 6, the controller 1 causes the FDD 8 to read the sequence program from the floppy disk 8-1 and transfer it to the user RAM 4. At this time, for sequence programs with comments, part of the comments are also transferred to the user RAM 4.

In this example, the first four characters for one comment are treated as part of the comment. Subsequently, (:PUl transmits the sequence program and comments in the user RAM 4 to the programmable controller 20 using the conventional procedure.

Based on the control procedure shown in FIG. 4, the CPU 21 of the programmable controller 20 stores the received sequence program and comments in the respective storage areas of the user RAM 22 (step Sll-312→S14 in FIG. 4).
).

The stored sequence program is used as an automatic control program for the equipment to be controlled, and the comments are used for checking the floppy disk when displaying the sequence program on a monitor, which will be described later.

Next, when the user instructs the monitor mode from the keyboard input device 6, the CPU of the programming device 10,
In Fl, the CPU 2 of the programmable controller 20
1 to read and transmit the sequence program and comments (step Sl in FIG. 3).

The CPU 21 on the programmable controller 20 side is the fourth
Following the control procedure in the figure, the sequence program and comments are read from the user RAM 22 and then transferred to the programming device 10 (step Sll in Figure 4→
S20-524).

When the CPUI of the programming device 10 receives the sequence program and comment, it stores the sequence program in the user RAM 4 (step Sl in FIG. 3).

Next, after confirming the attachment of the floppy disk 8-1 based on the attachment signal of the FDD 8, the sequence program and comments in the user RAM 4 are read out. At this time, the comment received from the programmable controller 20,
The contents of comments read from the floppy disk 8-1 are compared using the CPUI. When the CPUI confirms that both comments match, it determines that the correct floppy disk is installed, and displays the sequence program and the comment for the floppy disk 8-1 on the display 7 as shown in Figure 6. Step S2→S3→S in Figure 3
4→S5→S7).

Furthermore, if a floppy disk different from the floppy disk of the sequence program loaded into the programmable controller 20 is loaded, the CPUI detects that the wrong floppy disk is loaded in the content comparison at step S4 in FIG. . At this time, the CPUI uses the comments received from the programmable controller 20 to display the sequence program on the display 7 as shown in FIG. 7 (steps S4→S6 in FIG. 3).
→S7).

In this way, in this embodiment, when loading the sequence program from the floppy disk to the programmable controller, a part of the comments are also transferred and stored in the programmable controller. Also, when monitoring the sequence program, check the comments stored in the programmable controller and the comments on the floppy disk installed at the time to confirm that the installed floppy disk is the correct floppy disk from which the sequence program being loaded was read. I can do it.

Further, even if the installed floppy disk is an incorrect one, the comments stored in the programmable controller can be used, so there is no problem in monitoring the sequence program.

Furthermore, the comments stored in the programmable controller are part of the comments on the floppy disk.
Since it is not necessary to store everything, the memory capacity of the programmable controller can be saved.

In addition to this embodiment, the following examples are given.

(1) In this embodiment, the comment information read from the floppy disk during loading is stored in the internal memory of the programmable controller 20, but it may be stored in the internal memory of the programming device.

(2) In this embodiment, the comment to be transferred to the programmable controller 20 is determined to be the first four characters of the comment on the floppy disk 8-1, but depending on the memory capacity on the programmable controller 20 side and the content of the comment, Needless to say, it is sufficient to set a certain number of characters.

(Effect of the invention 1 As explained below, according to the present invention, even if a storage medium (floppy disk) is incorrectly installed when monitoring a sequence program, error comment information is displayed as in the conventional example. Loading sequence program and corresponding comment information are displayed correctly.

Furthermore, since a part of the comment information in the storage medium is used for the comment information, it is possible to save the memory capacity of the storage means.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing a specific circuit configuration of an embodiment of the present invention, and FIGS. 3 and 4 are operations of the embodiment of the present invention. FIG. 5 is an explanatory diagram showing the comment contents of the embodiment of the present invention; FIGS. 6 and 7 are explanatory diagrams showing display examples of the embodiment of the present invention. Book, comment contents of all examples (shown, T theory, date and month diagram, Figure 5)

Claims (1)

[Claims] 1) Storing a created sequence program and comment information in a storage medium that is removable from a programming device;
In a programmable controller system that reads comment information to be displayed from a storage medium attached to the programming device when loading a sequence program on the storage medium into the programmable controller and displaying the loaded sequence program on the programming device, When loading the sequence program, a storage means for reading and storing part of the comment information to be displayed is provided in either the programmable controller or the programming device, and when displaying the loading sequence program, At that time, by comparing the content of the comment information on the attached storage medium and a part of the comment information on the storage means, it is determined that the attached storage medium is the storage medium from which the loading sequence program was read. an identification means for identifying and determining whether or not the identification means exists; and when the determination result of the identification means is a positive determination, comment information of the attached storage medium is selected as a display target; and when the determination result of the identification means is a negative determination, the comment information is selected as a display target; A programmable controller system characterized in that the programming device is provided with display control means for selecting comment information in the storage means as a display target.