JP3397006B2 - I / O display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for input / output data such as a programmable controller.

[0002]

2. Description of the Related Art PLC (Programmable Controller)
A conventional technique for displaying input / output data in FIG.

FIG. 5 shows a conventional PLC (programmable controller). As shown in FIG. 5, it can be roughly classified into a) building block type and b) block type.

In FIG. 5a), 501 is a power supply unit, 502 is a CPU unit, and 503 to 507 are input / output units. A PLC is configured by connecting these units. FIG. 5b) is a configuration in which each unit of FIG. 5a) is contained in one housing.

In either case, the display (usually L
ED) 509 to 513 and an indicator 514. These indicators can display data corresponding to the number of input / output points attached to the input / output unit. LED
In the case of, the input / output points correspond to the LEDs of the display.
Therefore, if the number of LEDs of the display device is equal to or more than the input / output points, the display can be performed as it is.

In a PLC (programmable controller), displaying input / output data is an indispensable function in wiring confirmation and control system operation confirmation when a control system is constructed using the PLC. In such confirmation, the main confirmation method is to confirm that the output data is turned ON (or OFF) when the input data is turned ON (or OFF) using a display device.

[0007]

When a control system is constructed using a PLC, the control becomes complicated and the number of input / output points increases as the system scale increases. As the number of input / output points increases, the number of input / output units also increases. Further, since the input / output unit is installed near the connected device, the installation place of the unit is dispersed. Due to such an increase or distribution of the number of units, it is difficult to deal with the input / output display device (identify which unit), or the input / output display cannot be confirmed at one place.

Further, as described above, since the display attached to the input / output unit has only the function of displaying the input / output data as it is, the display is often unnecessary when the operation confirmation work is completed. There is a problem of becoming.

An object of the present invention is to provide a method for solving such a problem.

[0010]

In order to achieve the above-mentioned object, the invention according to claim 1 has a CPU unit for collectively managing input / output data, and one or a plurality of input / output units, , The CPU unit, a storage element for storing the input / output data, an input / output data indicator for displaying the stored input / output data, and an input / output data of the one or more input / output units An input means for designating an input / output unit to be used, a storage element for storing data indicating the position of the input / output unit input by the input means, and a position of the input / output unit stored in the storage element are indicated.
In output display device 1 to which a plurality of display units located only indicator displays the to data is provided, wherein the C
Display unit position indicator for PU unit
With this , it is possible to confirm which position of the one or more input / output units the input / output data being displayed on the input / output data display is .

According to a second aspect of the present invention, in the first aspect of the invention, the counter for measuring the display time and the output of the counter are used to switch the position display contents displayed on the display unit position dedicated display in a time division manner. An input / output display device having a switching circuit and indicating which data is in which position the input / output data currently being displayed.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described above, there is provided an input / output display device characterized in that means for detecting a failure and the details of the detected failure are displayed on the input / output data display.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, there is provided a storage means in which a user can arbitrarily set data and a switching means, and the switching means allows the user to set the data. The input / output display device is characterized by displaying arbitrary data set by.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, there is provided means for switching input / output data display and memory display, and also displays data at an arbitrary address of the memory. Is an input / output display device.

[0015]

In the present invention, the operation switch can be operated while confirming the display unit position dedicated display indicating which position the input / output data currently being displayed is. Further, by switching the display data of the input / output data display corresponding to the plurality of input / output units, the input / output data of an arbitrary input / output unit can be displayed on the nearby input / output display.

Further, in the present invention, when the number of input / output units being displayed exceeds the number of displayable points of the display unit, the data display unit displays data corresponding to the number of displayable points, and a display dedicated to the display unit position. The position of the unit displaying the data and the address in that unit are displayed in the container.
Display in time division.

In the present invention, when a failure occurs, the details of the failure are displayed on the input / output data display.

In the present invention, the data arbitrarily set by the user is displayed according to the user's setting during normal driving.

In the present invention, by displaying the data by the address, the data of the input / output units distributed and installed can also be displayed.

In the present invention, when the user arbitrarily selects the input / output data, only the necessary data is displayed on the input / output display.

[0021]

Embodiments of the present invention will now be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 shows the appearance of a display device according to an embodiment of the present invention, FIG. 2 shows its circuit configuration, and FIG. 3 shows a processing flow. The PLC (programmable controller) performs the calculation, outputs the data to the output unit after the calculation is completed, and then collects the input data. These processes are
Everything in the PLC is managed by the CPU section. Therefore, the control of the input / output data is also performed by the CPU section.

FIG. 1 shows the minimum configuration of this embodiment, which has two sets of input / output data indicators 102 and 103, display unit position dedicated indicators 105 and 107, and operation switches 106 and 108. The display 101 also displays the PLC status. Further, the display unit 111 displays the identification of the type of data selected by the operation switch 104 and displayed on the display units 102 and 103.

Incidentally, these input / output data display 10
2, 103, display unit position display 105, 10
It is preferable that two sets of 7 and the operation switches 106 and 108 are provided to confirm the relationship between the input and the output, but one set may be provided. In addition, the operation switches 106 and 108 form an input unit.

In FIG. 2, data from the input point (operation switch 106 or 108) indicated by reference numeral 204 is transferred to the buffer 207 via the switch input circuit 201.
Input to the CPU. Switch input circuit 20
Reference numeral 1 is a circuit for recognizing that the operation switch 106 or 108 has been operated. A plurality of LEDs 205 (input / output data display 102 or 103) that display input / output data are driven by the input / output display register 202. The 7-segment numeral display 206 (display unit position dedicated display 105 or 107) is driven by the display position register 203. These registers include the CPU
Data is set via the buffer 207.

The switch input circuit 201 needs to have a circuit configuration for storing only a signal change if one cycle of the collection flow is sufficiently short, and a circuit for counting the number of changes if the cycle is long. This switch input circuit 20
1 is configured to be automatically reset by hardware when the input information is read by the CPU.

The numeral display 206 (display unit position dedicated display 105 or 107) is a 7-segment display, and the slot of the unit currently displayed in the input / output data display by the displayed number. The position is shown. However, other indicators may be used.

The flow of processing in these configurations will be described with reference to the flowchart of FIG. By the initial processing (initial setting processing) (S301), the position of the unit displaying the input / output data is determined, and the data of each unit is collected (S302). Next, a switch state collection (S303) on whether or not an instruction to display the data of units other than the display unit, which is predetermined by the initial processing (S301), is given from the operation switches 106 and 108 (S303) I do. Operation switch 106,1
If 08 is not operated, the data of the unit determined by the initial process from the data collected in step S302 is input to the input / output display register 202, and
Data indicating the position is written in the display position register 203 and displayed (S304). Next, calculation is performed (S3
05), the output data is updated (S306). After the output data is updated, the process returns to step S302 to collect the input data and then collect the states of the operation switches 106 and 108.

If the collected operation switches 106, 10
If the state of No. 8 indicates that it is not operated, it indicates that the new data of the same unit as the previous time is written in the input / output display register 202 and the display position register 203, and the operation switches 106 and 108 are operated. If
According to a predetermined rule such as advancing the order of the units for displaying data, new data of a unit different from the previous unit is written in the input / output display register 202 and the display position register 203.

(Embodiment 2) In FIG. 1, the input / output data display is provided with only 32 points per set, and if the number of units exceeding that is mounted, the display cannot be performed. Therefore, when the number of displayable points is exceeded, the display is divided by the number of displayable points (32 points in the present invention).

An embodiment of this structure will be described with reference to FIG.
4 is different from the configuration shown in FIG. 2 in that a timer 405 for measuring the display time, a switching circuit 408 and a display position register 404 are provided, and other configurations are the same as those shown in FIG. Same as 4.

The operation of the embodiment shown in FIG. 4 will be described. The divided input / output data of a certain unit that can be displayed is written in the display register 402, and the corresponding divided position and mounting position of the written input / output data are written in 404 and 403, respectively. The timer 405 is activated from the time of writing, and the display indicating the mounting position and the division position are displayed in a time division manner, for example, the mounting position data is 5 seconds and the division position data is 1 second. As a result, the division position can also be displayed on one display slot position dedicated display by time division.

(Embodiment 3) Another embodiment will be described with reference to the configuration shown in FIG. In FIG. 2, just before the display data is output (before S304 in FIG. 3), the failure information is checked to see if there is any hindrance to the operation of the PLC (programmable controller). If there is no failure information, the operation described in the first and second embodiments is performed. However, if a failure has occurred, the data indicating the failure information is output to the input / output register 202 as display data and displayed. As a result, the PLC user does not need to prepare another display device for the failure information.

At this time, it is easier to understand by turning on the LED indicating that the failure information is being displayed (MENT of 111). In addition, the display unit position dedicated indicators 105 and 10
It is also possible to display failure information on 7.

Of course, a plurality of pieces of failure information can be switched and displayed by the switches 106 and 108. At this time, a plurality of types of failure information will be displayed on the display unit position dedicated display.

(Fourth Embodiment) Another embodiment will be described with reference to the configuration of FIG. In this embodiment, the user needs a storage element for which data can be set and a switch for switching the display. This is a specific address position of the memory normally held by the CPU unit and the switch 104.
(FIG. 1) can be used.

In the configuration of FIG. 2, immediately before the display data is output (S304 in FIG. 3), the user sets whether the switching information set by the switch 104 displays the input / output data. Make sure you want to display the data. If the input / output data is displayed, the operation is performed as in the first and second embodiments. If the data set by the user is displayed, the data set in the memory by the user is output as the display data.

Thus, for example, if the data of the memory is changed according to the control stage by the program, by outputting the data of this memory, it is possible to display what kind of control the PLC is currently performing. It can be confirmed by the vessel.

(Embodiment 5) PLC using CPU
The (programmable controller) collectively manages the input / output data on the memory.

Therefore, for example, in the switch 104,
If the display unit position can be set to the address, the input / output data on the memory can be output to the display. In this case, the switches 106 and 108 are designed to specify an address. And indicators 105 and 1
07 will display the address.

By doing so, since the input / output data can be confirmed by the CPU unit, the input / output data of the input / output units dispersedly installed at a distant place can also be confirmed at one place.

(Sixth Embodiment) Another embodiment will be described. By setting the switch 106 and the switch 108 by the user, the input / output data at an arbitrary position can be displayed. In order to do this, the user's setting is confirmed immediately before the display data output in FIG. According to the setting of the user, data is collected in 1-bit units from the input / output data on the memory and output as display data.

[0043]

As described above, according to the present invention, it is possible to display a large amount of data with a small number of display functions, and to display the input / output unit at a distant place and only necessary data to facilitate confirmation. The effect is born. With that,
Since it is not necessary to provide a display unit on the input / output unit, the input / output unit can be downsized.

Further, the effect that the control state of the PLC and the failure information can be confirmed by the display which becomes unnecessary after the completion of the confirmation of the normal operation is produced.

[Brief description of drawings]

FIG. 1 is a diagram showing an appearance of a display device of the present invention.

FIG. 2 is a block diagram showing a configuration of the present invention.

FIG. 3 is a flowchart showing a process of the present invention.

FIG. 4 is a block diagram showing another configuration of the present invention.

5A and 5B are diagrams showing an appearance of a conventional display device, FIG. 5A is a building block type diagram, and FIG. 5B is a block type diagram.

[Explanation of symbols]

101 display device 102, 103, 205, 407 input / output data display device 105, 107, 206, 409 display unit position dedicated display device 201, 401 switch input circuit 202, 402 input / output display register 203, 403 display position register 204, 406 Switch 207,410 Buffer 405 Timer 408 Switching circuit

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Claims (6)

(57) [Claims] 1. A CPU unit for collectively managing input / output data, and one or a plurality of input / output units, wherein the CPU unit has a storage element for storing the input / output data, and the storage element. Input / output data indicator for displaying input / output data, input means for indicating the input / output unit of the one or more input / output units to display input / output data, and input / output input by the input means A storage element for storing data indicating the position of the unit, and one or a plurality of display unit position-specific indicators for displaying data indicating the position of the input / output unit stored in the storage element are provided. Dedicated input / output display device, dedicated to the position of the display unit provided in the CPU unit
The display, output display device input and output data being displayed on the input and output data indicator, characterized in that it can be confirmed whether of any position of said one or a plurality of input and output units. 2. The invention according to claim 1, further comprising a counter for measuring a display time, and a switching circuit for switching the position display content displayed on the display unit position dedicated display by time division by the counter output. An input / output display device characterized in that the input / output data currently being displayed indicates which data at which position. 3. The invention according to claim 1 or 2,
An input / output display device for displaying a means for detecting a failure and the detected failure content on the input / output data display. 4. The invention according to any one of claims 1 to 3, further comprising a storage unit in which a user can arbitrarily set data and a switching unit, and the arbitrary data set by the user by the switching unit. An input / output display device characterized by displaying. 5. The input / output device according to any one of claims 1 to 4, further comprising a switching unit for displaying input / output data and a memory display, and displaying data at an arbitrary address of the memory. Display device. 6. The input / output display device according to any one of claims 1 to 5, further comprising means for arbitrarily selecting input / output data and displaying only necessary data.