JPH0277901A - Programming device for sequencer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a sequencer programming device for creating a ladder circuit using ladder diagram symbols. [Prior Art] Fig. 4 is a block diagram for explaining the configuration of a conventional programming device of this type. ) is a circuit creation means that creates a circuit using ladder diagram symbols based on the human data and displays it on a display means (3) such as a CRT. Therefore, (4) is a machine language conversion means that converts the circuit created by the circuit creation means (2) into machine language and provides a machine language program to the sequencer (7), and (5) means for monitoring the machine language program stored in the sequencer (7);
(6) indicates an inverse conversion means for inversely converting the machine language program and inputting it to the circuit creation means (2) and displaying the circuit on the display means (3) in the same manner as described above. Next, the operation related to the above configuration will be explained based on an example of creating a ladder circuit shown in FIG. In addition, in the same figure, Xo
, Xs, Xzo, X2. Y+z is an a contact, x1 is a b contact, and YIO and Y12 are output relays. The ladder circuit shown in FIG. 5 is created by circuit creation means (2) using ladder diagram symbols built into the programming device and displayed on the CRT (3). Here, the ladder circuit configured by the ladder diagram symbols XO, XS, Y2°, and YIO has the input signal x0 turned on,
It also shows that the output relay YIO is in the ON state when the input signal X and the input signal Y20 are in the ON state. Similarly, when the input signal x2 is ON and the human input signal X is OFF or the input signal Y12 is ON, the output relay Y12 is turned ON. A ladder circuit as described above is created on the CRT (3), and is converted into machine language by a conversion means (4) for converting it into machine language. The machine language program converted into machine language is downloaded to a sequencer (7) that performs control operations, and the sequencer (7) controls a belt conveyor (not shown) etc. according to the machine language program. Next, when monitoring the operation of the sequencer (7), the machine language program stored in the sequencer (7) is uploaded to the programming device. The uploaded machine language program is displayed as a ladder circuit on the CRT (3) by an inverse conversion means (6) that converts the machine language into a ladder circuit. In other words, the ladder circuit reproduced on the CRT (3) makes it possible to monitor the operation of the sequencer (7), and for example, it is possible to monitor the operation of the sequencer (7), such as when the input signal Therefore, if the input signal X turns ON, the output relay YIO should turn ON. [Problem to be Solved by the Invention] Since the conventional sequencer programming device is configured as described above, it is difficult to understand each signal from the ladder circuit diagram with relay contacts created and displayed when understanding the control operation of the sequencer. It is difficult to distinguish whether the control signal is from the main function or the control signal from the sub-function. In other words, among the existing signals, it is a signal from the main function that can confirm the operation of the controlled object on a one-to-one basis, or a signal from other It is difficult to distinguish between signals caused by interlock conditions, display functions such as operation indicator lamps, or virtually created sub-functions such as internal registers, and it is difficult to understand the flow of operation unless you fully understand the entire ladder circuit diagram.
Therefore, there is a problem in that when the control system stops, it takes time to repair it. The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sequencer programming device that allows the flow of the entire ladder circuit diagram to be easily grasped. (Means for Solving the Problems) A sequencer programming device according to the present invention includes a circuit creation means for creating a ladder circuit using ladder diagram symbols based on input data through an input unit such as a keyboard, and a display for displaying the created results. In the sequencer programming device, the sequencer programming device includes display means for converting the ladder circuit into machine language and machine language conversion means for providing the sequencer with a machine language program obtained by converting the ladder circuit into machine language. The sequencer of the present invention is provided with a condition creating means for creating a ladder condition corresponding to a symbol, and when displaying a ladder circuit on the display means, a ladder condition display area is provided to display the ladder condition. According to the programming device, a ladder condition corresponding to each ladder diagram symbol is created by the condition creation means, and when the ladder circuit is displayed on the display means, the ladder condition is displayed, and when understanding the control operation of the sequencer, the ladder condition is displayed. The general operation of the main function can be grasped in the ladder diagram, and the detailed operation of the sub-functions such as interlock conditions can be grasped by the information written in the ladder condition display area. [Example] Hereinafter, one embodiment of the present invention will be explained based on FIG. 1, in which the same parts as in FIG. shows a condition creation means for creating ladder conditions corresponding to each ladder diagram symbol based on input data,
When displaying the ladder circuit created by the circuit creation means (2) on the display means (3), the ladder conditions created by the condition creation means (8) are displayed in respective predetermined display areas corresponding to each ladder diagram symbol. is being done. That is, the circuit creation means (2) creates a ladder diagram showing the general operation of the main function, and the condition creation means (8) creates ladder conditions showing the detailed operation of the sub function. The rest is the same as the conventional example. Next, the operation of the above structure will be explained based on an example of creating a ladder circuit shown in FIG. Ladder symbols Xo, Y10. A ladder circuit using J and Y12 is created. Similarly, a ladder condition display area (11) corresponding to each ladder symbol is created by a ladder condition creation means (8) built in the programming device.
Ladder conditions are created and displayed in each area of (21), (31), and (41). Further, the ladder circuit and the ladder conditions are converted into machine language by a conversion means (4) that converts each into machine language, and the machine language program converted into machine language is downloaded to a sequencer (7) that performs control operations. The sequencer (7) controls a belt conveyor (not shown) in accordance with the machine language. Furthermore, when monitoring the operation of the sequencer (7), the machine language program stored in the sequencer (7) is uploaded to a programming device. The uploaded machine language program is converted into a CRT (3
) is displayed. That is, the sequencer (
7) operation monitoring becomes possible, for example, “human power signal x0
It is possible to monitor based on predictions such as, "If YIO turns on, output relay YIO should turn on." At this time, if the active level display (500) in the form of a horizontal bar graph as shown in FIG. 3 is displayed in the ladder condition display area (11), It is possible to monitor without checking the ON/OFF states of all the listed ladder conditions. That is, there are two ladder conditions in this display area (11): Since the level can be displayed at 50% when the main function is in standby mode, the 0N10FF state can be confirmed, and the active state of the control signal by the sub function can be displayed as a percentage, it is easy to roughly understand whether the control signal by the main function is in the standby state. . In the above embodiment, the description language in the ladder condition display area (11) was described as "X, = OFF" and "Y2O = ON-," but the ladder conditions can be written in, for example, BASIC language or C language. Needless to say, the same effect can be obtained even if the ladder condition display area is provided below the ladder symbol. Needless to say.Furthermore, although the active level display is provided as a horizontal bar graph display at the bottom of the ladder condition display area, it can also be displayed at the top of the ladder condition display area mentioned above, or vertically in the left and right direction. Of course, the same effect can be obtained even if the active level is displayed in an analog manner in the above embodiment, but it goes without saying that the same effect can be obtained even if the active level is displayed digitally (percentage value).

【Effect of the invention】

As described above, according to the present invention, a sequencer control program can be created and displayed using a ladder circuit diagram showing the general operation of the main function and a ladder condition showing detailed operation of the sub function. Therefore, even if you do not understand the entire ladder circuit diagram, you can easily understand the flow of the control program operation, and if the control system stops, you can immediately respond to it.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a configuration according to an embodiment of the present invention, Fig. 2 is a ladder circuit diagram showing an example of creation based on the configuration of Fig. 1, and Fig. 3 shows another example of creation corresponding to Fig. 2. FIG. 4 is a block diagram showing the configuration of a conventional example, and FIG. 5 is a ladder circuit diagram according to the same conventional example. (1)...Input section, (2)...Circuit creation means, (3
)...display means, (4)...machine language conversion means, (7
)...Sequencer, (8)...Condition creation means, (1
1), (21), '(H). (41)...Ladder condition display area. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] a circuit creation means for creating a ladder circuit using ladder diagram symbols based on input data from an input unit such as a keyboard;
In a sequencer programming device comprising a display means for displaying the created result and a machine language conversion means for converting the ladder circuit into machine language and supplying the sequencer with a machine language program, input data from the input section is provided. The present invention is characterized by comprising a condition creation means for creating a ladder condition corresponding to each ladder diagram symbol based on the above, and when displaying a ladder circuit on the display means, a ladder condition display area is provided to display the ladder condition. Sequencer programming device.