JPH01147702A - Programming device - Google Patents

Abstract

PURPOSE:To easily know the condition of a specific relay or the relation between the other relay by receiving forced information from a programmable controller, and converting the forced information into a display symbol for a chart expression. CONSTITUTION:The forced information to indicate whether or not the specific relay is forcibly altered and the condition of forced alteration is received from the programmable controller by a receiving means 100. The forced information is altered to the display symbol for the graphical expression by a display control means 200. Thus, the forced information can be displayed in a sequence program graphically displayed to a display means 300, and the condition of the specific relay or the relation between the other relay can be easily known. Further, even when the sequence program is altered, the forced alteration of the condition of the specific relay due to a malfunction can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a programming device for a programmable controller capable of forcibly turning on or turning off an input/output relay.

[Prior Art] In general, programming devices are known that are capable of instructing to forcibly turn on or off an input/output relay of a programmable controller.

Among these programming devices, a programming device that forcibly turns on/off a human output relay only at the moment when instructed by a key operation from the programming device, that is, rewrites the contents of the input/output relay, is capable of forced on/off.
The value of this input/output relay changes depending on the control operation of the sequence program after turning off.

Therefore, there is no need to display the forced on and forced off states of the input/output relays on the programming device. However, once set by the programming device, the forced on
In a programmable controller that can maintain a forced off state, a forced on/off memory corresponding to the input/output relay that is forced on/off is provided, and the forced on/off state of each input/output relay is maintained in the forced on/off state. There has also been proposed a programming device (see Japanese Patent Application Laid-open No. 117182/1982) which stores information in a /off memory and displays the forced on/off state of each input/output relay using an indicator lamp.

[Problems to be Solved by the Invention] However, with conventional programming devices of this type, it is difficult to know the relationship between input/output relays that should be forced on/off in a sequence program and other input/output relays. If the program is changed, there is a problem in that anyone other than the person who changed the program cannot understand the relationship between the input/output relay that is forced on/off and other input/output relays.

Therefore, the purpose of the present invention is to solve such problems,
It is an object of the present invention to provide a programming device having a display function that allows one to easily know the forced on/off state of an input/output relay and its relationship with other relays on a sequence program.

[Means for Solving the Problems J] In order to achieve such an object, the present invention executes a sequence program and forcibly changes the on/off state of a specific contact to be controlled in the sequence program. In a programming device that is connected to a programmable controller such as a receiving means for receiving data from the programmable controller, a displaying means for displaying the sequence program in a diagram, and a display screen of the displaying means for converting the forced information received by the receiving means into predetermined display symbols and using the display symbols as forced information. The present invention is characterized by comprising a display control means for graphically displaying the sequence program on the diagrammatically displayed sequence program.

[Function] In the present invention, the receiving means receives force information indicating whether or not a specific relay is forcibly changed and the state in which it is forcibly changed, and the display control means receives force information indicating whether or not a specific relay is forcibly changed. Since the information is converted into display symbols for graphical representation, forced information can be displayed in the sequence program that is graphically displayed on the display means, making it easy to see the status of a specific relay and its relationship with other relays. Therefore, even if the sequence program is changed, it is possible to prevent the state of a specific relay from being forcibly changed due to an erroneous operation.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the basic configuration of this embodiment.

In FIG. 1, a dash-dot line block 41 is a programming device that is connected to a programmable controller that can forcibly change the on/off state of a specific contact to be controlled in a sequence program, and inputs the sequence program.

Reference numeral 100 denotes receiving means for receiving forced information from the programmable controller indicating whether or not the on/off state of the specific contact has been forcibly changed and the state of the specific contact that has been forcibly changed.

300 is a display means for graphically displaying the sequence program.

Display control means 200 converts the forced information received by the receiving means 100 into predetermined display symbols, and graphically displays the forced information using display symbols on the sequence program displayed graphically on the display screen of the display means 300. It is.

FIG. 2 shows a specific configuration of the programmable controller system in this embodiment.

In FIG. 2, 10 is a programmable controller 4
This is an input/output device that exchanges input/output information with respect to an external device (not shown) with 0.

A programmable controller 40 performs sequence calculations based on input information sent from the input/output device 10, and outputs the sequence calculation results to the input/output device 10 as output information. Programmable controller 40
, 1 is a control circuit that controls the operation of each component of the programmable controller 40 .

A reading circuit 2 reads input information stored in the data memory 7 and outputs the read information to the sequence calculation circuit 6 and the transmission circuit 4.

3 is a write circuit, which writes the input information sent from the input/output device IO to the data memory 7, and writes the input information sent from the input/output device IO to the transmission circuit 4.
The information inputted from the programming device 41 via the programming device 41 is written into the data memory 7 and the program memory 5.

A program memory 5 stores a sequence program to be executed by the sequence calculation circuit.

A data memory 7 stores information exchanged with the input/output device 10, functions as an input/output relay, and stores data necessary for sequence calculations.

Reference numeral 8 denotes a forced-on memory that stores forced information indicating whether or not an input/output relay (specific contact) that should be forced on among the input/output relays provided in the data memory 7 is forced on.

Reference numeral 9 denotes a forced off memory that stores forced information indicating whether or not an input/output relay (specific contact point) that should be forced off among the input/output relays provided in the data memory 7 is forced off. Programmable controller 40 with such a configuration
In general, control circuit 1. Readout circuit 2. Write circuit 3. The sequence calculation circuit 6 is a central processing unit (CP).
tl) performs the functions of each of the above-mentioned circuits.

30 is a transmission line for transmitting various information between the programmable controller 40 and the programming device 41.

A programming device 41 inputs a sequence program to be executed by the programmable controller 40 and displays a sequence program stored in the programmable controller.

In the programming device 41, 20 is a transmission circuit that exchanges information with the programmable controller 40. 21 reads stored information from the data memory 27 and outputs it to the transmission circuit 20 and the display 25.

22 is a write circuit for writing information into the data memory 27;

23 is a determination circuit that determines whether the input/output relay is in a forced ON state or a forced OFF state;
The forced on/off state is determined based on the stored information of the forced on memory 8 and the forced off memory 9 sent through the memory 0.

24 is a control circuit that controls the operation of each component of the programming device 41. A display 25 displays information sent from the programmable controller 40, information input from the keyboard 26, and the like.

Reference numeral 26 denotes a keyboard that can input various information in addition to sequence programs. A data memory 27 stores information necessary for the control procedure executed by the control circuit 24.

Reference numeral 28 denotes a program memory in which control procedures to be executed by the control circuit 24 are stored in advance, and in addition to the control procedure shown in FIG. The program to do this is stored. Reference numeral 29 denotes a symbol conversion table in which a sequence program, display information for symbolically displaying forced on and forced off states, and display information corresponding to sequence commands are stored in a table in a memory.

Note that the readout circuit 21. It is also possible to use a CPU for the write circuit 221, determination circuit 23, and control circuit 24.

Further, in this embodiment, the transmission circuit 20 is connected to the receiving means 10.
0, the determination circuit 23. - control circuit 24. The symbol conversion table 29 constitutes a display control means □.

Further, the display 25 corresponds to display means 300.

FIG. 3 shows the configuration of the forced on memory 80 and forced off memory 9 shown in the second figure.

In FIG. 3, a forced on memory 8 and a forced off memory 9 are integrally configured to store the address of the human output relay to be forced on or off in the data memory 7, and its type, that is, forced on, forced off, forced designation. Attribute information indicating "none" is stored in the forced on memory 8 and the forced off memory 9 in association with each other.

FIG. 4 shows the operating procedure of this embodiment.

FIG. 5(A) shows an example of a sequence program executed by the programmable controller 40. This sequence program indicates that the OR result of input relays BOO5 and B2O2 is stored in the output relay BOOI. In the program, the third
As shown in the figure, input relays BOO5 and BOO6 can be forcibly turned on and off, but no instructions are given to force on and off, and output relay BOOI is forced off, that is, input relays BOO5 and BOO6 shall be instructed to be turned off at all times regardless of the state of the

Returning to FIG. 4, when the programmable controller 40 executes such a sequence program, if the operator displays the above-mentioned sequence program on the display 25, the forced on memory 81 of the programmable controller 40 is forced off. The address stored in 9 and information on ON, OFF, and no forced designation (hereinafter, these information will be collectively referred to as forced information) are sequentially read out by the readout circuit 2, and sent to the determination circuit via the transmission circuit 4.20. 23 (step 51), in this example first relay B
Force information of 005 will be sent to the determination circuit 23.

The control circuit 24 stores the number of forced information reads in an internal register (step S2). When the count value of the internal register exceeds the number of input/output relays to be forced on or off, the control circuit 24 executes this operation procedure. finish.

Based on the received forced information, the determination circuit 23 determines that the state of the manual relay B005 is a state without forced designation, and transmits the determination result to the control circuit 24 (step S3).
.

The control circuit 24 outputs display information corresponding to the determination result of the determination circuit 23 from the symbol conversion table 2g to the display 25, and graphically displays the forced information on the display screen of the display 25.

As a result of the determination by the determination circuit 23, if the forced information indicates no forced designation, a display similar to the conventional sequence display is performed (step S4).

Further, as a result of the determination by the determination circuit 23, when the forced information is on, the control circuit 24 outputs display information with a symbol added, for example, to the display 25 in front of the target input/output relay, and A display as shown in Figure (B) is performed (step S5
), , In addition, as a result of the determination by the determination circuit 23, when the forced information is off, as shown in FIG. Control circuit 2
4 (step 56).

By repeating the above-mentioned procedure for all input/output relays to be forced on/off, forced on/off information can be added to the program sequence display.

For example, if you want to change the human output relay that should be forced on or off by recombining the sequence program,
The forced on/off memory 8.9 stores the forced information by simply rewriting the address and operation content of the relay according to the change, and there is no need to change the software program or hardware configuration on the programming device 41 side, and various changes can be made. It can correspond to sequence programs.

Furthermore, since a programmable controller generally periodically repeats reading information from an input relay, writing to an output relay, and executing a sequence program, forced information is transmitted from the programmable controller 40 to the programming device 41 in synchronization with this cycle. This allows the operator to know the latest forced information via the programming device 41.

[Effects of the Invention] As described above, according to the present invention, the means for receiving forced information indicating whether or not a specific relay is being forcibly changed and the state of being forcibly changed is sent from a programmable controller. Since the forced information is received by the display control means and converted into a display symbol for graphical representation, the forced information can be displayed in the sequence program that is graphically displayed on the display means, so it is possible to display the forced information in the sequence program that is displayed graphically on the display means. You can easily know the relationship with other relays, and even if the sequence program is changed,
An effect can be obtained in that it is possible to prevent the state of a specific relay from being forcibly changed due to an erroneous operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of the embodiment of the present invention, FIG. 2 is a block diagram showing the specific configuration of the embodiment of the present invention, and FIG. 3 is the forced on/off memory 8 shown in the second figure. FIG. 4 is a flowchart showing the operation procedure of the embodiment of the present invention, and FIGS. 5 (A), (B), and (C) are display examples of the display 25 in the embodiment of the present invention. FIG. 1.24... Control circuit, 10... Input/output device, 25... Display device, 29... Symbol conversion table, 40... Programmable controller, 41... Programming device. Figure 7 of Nesaibo Ij Figure 1 = 11-12

Claims (1)

[Scope of Claims] 1) A programming device that executes a sequence program, is connected to a programmable controller capable of forcibly changing the on/off state of a specific contact to be controlled in the sequence program, and inputs the sequence program. , receiving means for receiving forced information from the programmable controller indicating whether or not the on/off state of the specific contact has been forcibly changed and the forcibly changed on/off state of the specific contact; and the sequence program. a display means for graphically displaying the forced information received by the receiving means into a predetermined display symbol, and a sequence diagrammatically displayed on the display screen of the display means with the display symbol as the forced information; A programming device comprising display control means for graphically displaying a program. 2) In the programming device according to claim 1, the display control means displays the forced information sent in synchronization with periodic execution of the sequence program of the programmable controller on the display means. A programming device characterized by displaying updated information.