JPH0435084Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an abnormality display device for displaying in text an abnormality occurring in a machine such as a press machine.

(Prior Art) Conventionally, in press machines, etc., based on the output of abnormality detection sensors placed in each part,
An abnormality display device is used that displays abnormalities in each part in text on a CRT, plasma display, or the like.

(Problems to be Solved by the Invention) Since the conventional display device described above displays characters using ASC codes, the software and hardware for displaying characters are complicated and expensive.

(Means for Solving the Problem) In order to solve the conventional problems, the present invention detects the details of the abnormality in the machine based on the outputs of a plurality of abnormality detection means respectively arranged at a plurality of check points of the machine. An abnormality display device for a machine that displays characters, having a number of switch elements in one-to-one correspondence with the plurality of abnormality detection means, and the on/off state of each switch element corresponds to the presence or absence of abnormality detection by each of the abnormality detection means. The register table and the on/off judgment operation of the plurality of switch elements are executed for each switch element in the register table in accordance with a predetermined order, and when the judgment operation up to the final order is completed, the judgment operation of the first order is performed. determining means for repeating the determination operation from 1 to 3; a ring counter means for counting a number corresponding to the maximum number of switch elements that performs a counting operation once every time a determination is made for one switch element; an abnormality code output means for outputting the count value of the means as an abnormality code corresponding to the content of the abnormality of the machine while updating it for each count; and abnormality character content corresponding to each of the abnormality codes is stored and outputted from the abnormality code outputting means. a display means for displaying abnormal character contents corresponding to the output abnormal code; and an abnormal code output from the abnormal code output means when the switch means to be determined by the determination means is determined to be on. a first switch circuit that supplies the error code to the display means for a certain period of time and cuts off the supply of the abnormality code to the display means when the switch means is determined to be off;
During the predetermined period of time when the abnormality code is being supplied to the display means, the judgment operation by the judgment means and the counting operation of the ring counter means are stopped, and after the elapse of the certain period of time, the judgment operation of the switch element by the judgment means is stopped. and a second switch circuit that restarts the switching from the next switching element.

(Operation) According to the present invention having the above configuration, the determination means executes the on/off determination operation of the plurality of switch elements in the register table for each switch element in accordance with a predetermined order, and the determination operation up to the final order is performed. When it is finished, the judgment operation is repeated again starting from the first order. The ring counter means performs a counting operation once every time a determination is made for one switch element, and counts a number corresponding to the maximum number of switch elements. The abnormality code output means outputs the count value of the ring counter means as an abnormality code corresponding to the contents of the abnormality of the machine while updating it for each count. The abnormal character contents corresponding to each abnormal code are stored in advance in the display means, and the abnormal character contents corresponding to the abnormal code output from the abnormal code output means are displayed.

Further, the first switch circuit transmits the abnormality code outputted from the abnormality code output means to the display means for a predetermined period of time when the judgment means determines that the switch means to be determined is on. and when it is determined that the switch means is off, the supply of the abnormality code to the display means is cut off. Further, in the second switch circuit, the determination operation by the determination means and the counting operation of the ring counter means are stopped during the predetermined time period while the abnormality code is being supplied to the display means, and after the elapse of the predetermined time period, the determination operation is stopped. The determination operation of the switch elements by means is restarted from the next switch element in order.

Therefore, according to the present invention, when a plurality of abnormalities occur simultaneously, these abnormalities are determined in sequence, and each abnormal character content is sequentially displayed for a predetermined period of time for each determination.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment of an abnormality display device according to the present invention applied to a press.

In this embodiment, a programmable controller 10 ( (hereinafter abbreviated as PC)
and a memory 20 such as an EPROM in which code signals corresponding to each of the above-mentioned sensors are used as address data, and character display data regarding the content of the abnormality detected by each sensor is stored in advance at the corresponding address.
Then, a code signal outputted from the PC 10 is inputted via the input interface 30, and an address of the memory 20 is specified by this code signal, and the character display data for the code signal is sent from the memory 20. Central processing unit 40 to read
(hereinafter abbreviated as CPU) and a display 50 that displays the contents of the abnormality in text based on the text display data read from the memory 20.

The PC 10 is provided with a register table 11 consisting of a total of 16 registers R ₁ , R ₂ . . . R ₁₆ , the configuration of which is illustrated in FIG. The above registers R ₁ and R ₂ that constitute this register table 11
. . R ₁₆ each equivalently incorporates 16 normally open switch elements as shown in FIG. 3, so the table 11 has a total of 256 switch elements. The switch elements S ₁ to S ₂₅₆ built into each of the above registers R ₁ , R ₂ ... R ₁₆ correspond to 256 abnormality check sensors. If detected by the installed sensor, the switch element S ₁ of the resistor R ₁ is closed. Other switch elements are similarly closed when their corresponding sensors detect an abnormality.

Bit check unit 1 provided in the PC 10
2 sequentially applies a bit signal _to one end _of each contact _{S 1 ,} S ₂ , . It also functions to input the bit signal to the ring counter 14. On the other hand, the ring counter 14 has the function of counting the input bit signals, and therefore, the counted value is the number (any one of 1 to 256) of the switch element to which the bit signal is applied, that is, the number of the switch element to which the bit signal is applied, that is, the number of the switch element to which the bit signal is applied. suggests a number. The code converter 17 functions to output the count value of the ring counter 14 as an abnormality code corresponding to the content of the abnormality in the machine while updating it for each count.

The operation of this embodiment will be explained below. If the sensor detects an abnormality, such as a sliding failure, for example, the switch element _S241 of _R16 is closed. Therefore, the bit check signal output from the bit check section 12 is transmitted to this switch element.
When applied to S ₂₄₁ , the bit signal is applied to the relay 15 via the switch element S ₂₄₁ ,
This energizes the relay 15. By energizing this relay 15, its normally open contact 15
When a is closed, the relay 13 is energized via a normally closed contact 16a of a timer 16, which will be described later.

When the relay 13 is energized, its contacts 13
The relay 13 maintains itself via b. The closed contact 13c of the relay 13 starts the on-delay timer 16, the contact 13d connects the code converter 17 and the input interface 30, and the contact 13a sends a check command signal to the bit check section 12. Cut off.

When the check operation of the bit check section 12 is stopped by cutting off the check command signal, the ring counter 14 stops counting at the value 241. Then, the code converter 17 converts the count value of the counter 14
241, that is, a code signal (8-bit binary signal) indicating an abnormality called slide detection, is transmitted to the interface shown in FIG. 1 via the relay contact 13d in the closed state. - Add to Phase 30.

Based on the code signal inputted through the interface 30, the CPU 40 shown in FIG. As a result, the display 50 displays the content of the abnormality "slide error" in text, so that the operator can confirm the occurrence of the error "slide error".

By the way, the timer 16 closes its contact 1 after a predetermined time t (for example, 3 seconds) has passed since the timer 16 started operating.
Open 6a. By opening this contact 16a, the self-holding of the relay 13 is released and its contact 13d
Since the line is opened, the line between the code converter 17 and the input interface 30 is cut off. As a result, the abnormality display on the display 50 is performed only during the time period t counted by the timer 16.

On the other hand, the bit check command signal is again applied to the bit check section 12 by the closing operation of the contact 13a accompanying the release of the self-holding of the relay 13, so that the bit check section 1
2 starts the check operation again. Then, the bit check section 12 starts checking from the switch element S ₂₄₂ in the register table 11, and if there is a closed switch element, the same display effect as described above is performed. That is, a code signal for the bit number of the closed switch element is output from the code converter 17, and character display data corresponding to this code signal is applied to the display 50 for the time t counted by the timer 16.

In addition, if the abnormality (slide function) regarding the above switch element S ₂₄₁ is not removed,
Each time the bit check of element S ₂₄₁ is performed, the display 50 displays the time t. and switch element
When S ₂₄₁ and, for example, switch element S ₁ are closed, the display 50 alternately displays the details of the abnormality corresponding to these elements for a time t.

(Effect of the invention) As explained above, in the present invention, the content of the abnormality is converted into a corresponding code, and character display data corresponding to this code is read from the storage means and added to the display means. Therefore, since the contents of the abnormality are displayed, it is possible to display the contents of the abnormality without using high-grade hardware or software.
Also, if multiple abnormalities occur at the same time,
Since the contents of each abnormality are displayed sequentially for each preset time, there is an advantage that each abnormality can be evenly notified.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the abnormality display device according to the present invention, Fig. 2 is a circuit diagram showing an example of the configuration of the programmable controller shown in Fig. 1, and Fig. 3 is shown in Fig. 2. FIG. 2 is a diagram conceptually showing the function of a register table. 10...programmable controller, 11...
...Register table, 12...Bit check section, 13, 15...Relay, 14...Ring counter, 17...Code converter, 20...Memory,
40...Central processing unit, 50...Display device.

Claims (1)

[Scope of Claim for Utility Model Registration] A machine abnormality display device that displays the contents of a machine abnormality in text based on the outputs of a plurality of abnormality detection means respectively disposed at a plurality of check points of the machine, comprising: detecting the plurality of abnormalities; a register table having a number of switch elements in one-to-one correspondence with the means, the on/off of each switch element corresponding to the presence or absence of an abnormality detected by each of the abnormality detection means; and a register table for determining on/off of the plurality of switch elements. a determination means that repeats the determination operation for each switch element in the register table in accordance with a predetermined order, and when the determination operation up to the final order is completed, the determination operation is repeated from the first order; and the switch element ring counter means for counting a number corresponding to the maximum number of switch elements, which performs a counting operation once every time a judgment is made for one piece; an abnormality code output means that outputs the abnormality code while updating it for each count, and a display that stores abnormal character contents corresponding to each of the abnormality codes and displays the abnormality character contents corresponding to the abnormality code output from the abnormality code output means. means, and when the switch means to be determined is determined to be on by the determination means, the abnormality code outputted from the abnormality code output means is supplied to the display means for a predetermined period of time; a first switch circuit that cuts off the supply of the abnormality code to the display means when the means is determined to be off; and a determination operation by the determination means during the predetermined period of time when the abnormality code is supplied to the display means. and a second switch circuit that stops the counting operation of the ring counter means and restarts the judgment operation of the switch elements by the judgment means from the next switch element after the elapse of the predetermined period of time. An abnormality display device for machines that