CN202352296U - Digital display system based on control of programmable logic controller (PLC) - Google Patents
Digital display system based on control of programmable logic controller (PLC) Download PDFInfo
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- CN202352296U CN202352296U CN2011204701958U CN201120470195U CN202352296U CN 202352296 U CN202352296 U CN 202352296U CN 2011204701958 U CN2011204701958 U CN 2011204701958U CN 201120470195 U CN201120470195 U CN 201120470195U CN 202352296 U CN202352296 U CN 202352296U
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Abstract
The utility model provides a digital display system based on the control of a programmable logic controller (PLC), and the digital display system comprises the PLC, a latch decoder and a digital display tube, wherein the PLC is connected with a photoelectric counting unit and is used for scanning the photoelectric counting unit, converting the obtained scanned data into preset data and transmitting the preset data into the latch decoder; the latch decoder is connected with the PLC, and is used for decoding the converted data and outputting and latching the decoded data into a display driving signal for driving the digital display tube; and the digital display tube is connected with the latch decoder, and is used for displaying the latched data according to the display driving signal. The digital display system based on the control of the PLC is high in anti-interference performance, and can provide stable output display.
Description
Technical field
The utility model relates to a kind of digital display system based on PLC control.
Background technology
PLC is the major control equipment of industrial control field, uses for various automation control systems provide safe and reliable and fairly perfect control.In the industrial system of PLC control, it is the important component part of industrial automation equipment that numeral shows, can show actual count quantity intuitively.
Existing display packing all is that the method through dynamic scan shows usually, yet this display packing poor anti jamming capability causes the instability of demonstration easily, when being set in short-term the scan period, the low problem of display brightness can occur; When being set when long the scan period, the twinkling problem of glimmering can appear, can not reach a good effect.
The utility model content
In order to address the above problem, the utility model provides a kind of digital display system based on PLC control, and antijamming capability is strong, can provide stable output to show.
Concrete technical scheme is following:
A kind of digital display system based on PLC control that the utility model embodiment provides comprises Programmable Logic Controller, latch decoder and digital display tube, wherein
Said Programmable Logic Controller connects and scanning photoelectricity counting unit, will obtain scan-data and convert preset standard data to, and transfer to said latch decoder;
Said latch decoder connects said Programmable Logic Controller, and the data after the conversion are deciphered, and exports and latchs the display drive signals that obtains and drive said digital display tube;
Said digital display tube connects said latch decoder, and according to the data of display drive signals display latch.
According to one of the utility model preferred embodiment; Said latch decoder adopts the CD4511 chip; Its data input pin is a pin one, 2,6 and 7, and the latch signal end is a pin 5, and the decoding output terminal is a pin 9,10,11,12,13,14 and 16; Said data input pin is connected with said Programmable Logic Controller with the latch signal end, and said decoding output terminal is connected with said digital display tube.
According to one of the utility model preferred embodiment, be serially connected with divider resistance between the decoding output terminal of said latch decoder and the said digital display tube.
According to one of the utility model preferred embodiment, said latch decoder is corresponding one by one with digital display tube.
Can find out by above technical scheme; A kind of digital display system that the utility model provides based on PLC control; Thereby the mode that adopts Programmable Logic Controller to combine software to realize is controlled the duty control figure of latch decoder and shown to have latch function, and is less demanding to the scan period; Antijamming capability is strong, can provide stable output to show.
Description of drawings
Fig. 1 is the theory diagram based on the digital display system of PLC control that the utility model provides;
Fig. 2 is the circuit diagram based on the digital display system of PLC control that the utility model provides;
Fig. 3 is the workflow diagram based on the digital display system of PLC control that the utility model provides.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer, the utility model is described in detail below in conjunction with accompanying drawing and specific embodiment.
Embodiment 1
Fig. 1 is the theory diagram of the digital display system that provides of present embodiment, and Fig. 2 is the circuit diagram of the digital display system that provides of present embodiment, consults illustrated in figures 1 and 2ly, and this system comprises Programmable Logic Controller 101, latch decoder 102 and digital display tube 103, wherein
Programmable Logic Controller 101 connects and scanning photoelectricity counting unit, will obtain scan-data and convert preset standard data to, and transfer to latch decoder 102.The PLC signal that is converted to is transferred to the data input pin and the latch signal end of latch decoder 102, and the decoding output terminal of latch decoder 102 is connected with the data input pin of digital display tube 103.
Latch decoder 102 connects Programmable Logic Controller 101, and the data after the conversion are deciphered, and exports and latchs the display drive signals that obtains and drive digital display tube 103.
Digital display tube 103 connects latch decoder 102, and according to the data of display drive signals display latch.
Wherein, comprise latch signal and binary-coded decimal data in the PLC signal, latch signal is connected to the latch signal end of latch decoder 102, and the binary-coded decimal data are connected to the binary-coded decimal input end of latch decoder 102.The binary-coded decimal data are through the high-low level display drive signals of latch decoder 102 decoding back outputs " 0 " and " 1 ", in order to drive digital display tube 103.
As shown in Figure 2, this system comprises 4 latch decoders and 4 charactrons, latch decoder U1, U2, U3, U4 and digital display tube LED1, LED2, LED3, LED4, and latch decoder is corresponding one by one with digital display tube.Latch decoder 102 adopts the CD4511 chip, and its data input pin is the binary-coded decimal input end, is pin one, 2,6 and 7, and the latch signal end is a pin 5, and the decoding output terminal is a pin 9,10,11,12,13,14 and 16.Digital display tube 103 adopts the LED common cathode to show charactron, and its data input pin is a pin two, 3,4,5,7,8,9 and 10.Be connected in series divider resistance R9 ~ R36 between the decoding output terminal of latch decoder and the data input pin of digital display tube.The test input of latch decoder (pin 3) is connected+the 5V power supply with blanking input end (pin 4), is high level.Duty through the latch signal LE1 in the PLC signal after the conversion ~ LE4 control latch decoder.When LE1 was low level 0, latch decoder U1 allowed the output of decoding output terminal, and this moment, charactron LED1 showed according to the decode results output of the binary-coded decimal data A0 ~ A3 in the PLC signal.When LE1 was output as high level 1, latch decoder U1 was the locking hold mode, the numerical value of input before keeping, and this moment, the demonstration of charactron LED1 did not change.
Fig. 3 is the workflow diagram based on the digital display system of PLC control that present embodiment provides, and is as shown in Figure 3, comprising:
The count results that step S201, scanning photoelectric counting produce.
The photoelectric counting device is through photodiode, as object through the time shelter from the light that photodiode receives, photodiode is in not on-state, trigger circuit are counted action.Such as, when medicine particle quantity is counted, count through the motor rotation that triggers in the photoelectric counting device, fall a medicine and then write down a numeral.
PLC scans the count results that photoelectric counting produces, as scan-data.
Step S202, judge whether to accomplish a scan period, if then get into step S203; Otherwise, return step S201.
After accomplishing a scan period, just allow to be for further processing.
Step S203, reception scan-data.
The scan-data that PLC receives is the count results of photoelectric counting, is generally decimal data, also possibly be the data of standards such as scale-of-two or 16 systems.
Whether the data that step S204, judgement receive have renewal, if having, then get into step S205; Otherwise, get into step S207.
When having determined Data Update, but latch signal is set to input state, further handles.At this moment, latch signal is " 0 ", allows input.When determining data when not having renewal, latch signal is set to latch mode, does not receive data.At this moment, latch signal is " 1 ", hold mode.
Step S205, carry out data system conversion.
Convert the scan-data that receives to preset standard data.The tetrad data that said preset standard data are binary-coded decimal.Because the standard data that latch or code translator can be discerned are the binary-coded decimal data, thereby PLC need convert the scan-data that receives to the binary-coded decimal data.
Step S206, transmit control signal and change after data to latch decoder, carry out update displayed.
Comprise latch signal and binary-coded decimal data in the PLC signal.The control signal of sending is that numerical value is the latch signal of " 0 " in the PLC signal.When latch signal is " 0 ",, carry out update displayed with the output of the binary-coded decimal data decoding after the conversion.The binary-coded decimal data are through the high-low level display drive signals of decoding back output " 0 " and " 1 ", in order to the data of display latch.
This step is returned step S201 after accomplishing, and carries out the next one scan period.
Step S207, transmission latch signal keep original demonstration to latch decoder.
Sending latch signal is that numerical value when latch signal is " 1 ", does not receive the binary-coded decimal data for the latch signal of " 1 " in the PLC signal, keeps original demonstration.
This step is returned step S201 after accomplishing, and carries out the next one scan period.
The digital display system that the utility model provides based on PLC control; Thereby the mode that adopts Programmable Logic Controller to combine software to realize is controlled the duty control figure of latch decoder and is shown; Has latch function; Less demanding to the scan period, antijamming capability is strong, can provide stable output to show.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the scope of the utility model protection.
Claims (4)
1. based on the digital display system of PLC control, it is characterized in that, comprise Programmable Logic Controller, latch decoder and digital display tube, wherein
Said Programmable Logic Controller connects and scanning photoelectricity counting unit, will obtain scan-data and convert preset standard data to, and transfer to said latch decoder;
Said latch decoder connects said Programmable Logic Controller, and the data after the conversion are deciphered, and exports and latchs the display drive signals that obtains and drive said digital display tube;
Said digital display tube connects said latch decoder, and according to the data of display drive signals display latch.
2. system according to claim 1; It is characterized in that said latch decoder adopts the CD4511 chip, its data input pin is a pin one, 2,6 and 7; The latch signal end is a pin 5; The decoding output terminal is a pin 9,10,11,12,13,14 and 16, and said data input pin is connected with said Programmable Logic Controller with the latch signal end, and said decoding output terminal is connected with said digital display tube.
3. system according to claim 2 is characterized in that, is serially connected with divider resistance between the decoding output terminal of said latch decoder and the said digital display tube.
4. system according to claim 1 is characterized in that, said latch decoder is corresponding one by one with digital display tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204701958U CN202352296U (en) | 2011-11-23 | 2011-11-23 | Digital display system based on control of programmable logic controller (PLC) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204701958U CN202352296U (en) | 2011-11-23 | 2011-11-23 | Digital display system based on control of programmable logic controller (PLC) |
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| Publication Number | Publication Date |
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| CN202352296U true CN202352296U (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204701958U Expired - Lifetime CN202352296U (en) | 2011-11-23 | 2011-11-23 | Digital display system based on control of programmable logic controller (PLC) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246229A (en) * | 2013-04-23 | 2013-08-14 | 大连民族学院 | Single-line PLC (programmable logic controller) data display instrument |
| CN112581878A (en) * | 2020-12-17 | 2021-03-30 | 优利德科技(中国)股份有限公司 | Dot-matrix nixie tube and display control method thereof |
| CN115240577A (en) * | 2022-06-20 | 2022-10-25 | 浙江锋华创芯微电子有限公司 | Digital display device and method on nixie tube based on single-wire communication |
-
2011
- 2011-11-23 CN CN2011204701958U patent/CN202352296U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246229A (en) * | 2013-04-23 | 2013-08-14 | 大连民族学院 | Single-line PLC (programmable logic controller) data display instrument |
| CN112581878A (en) * | 2020-12-17 | 2021-03-30 | 优利德科技(中国)股份有限公司 | Dot-matrix nixie tube and display control method thereof |
| CN115240577A (en) * | 2022-06-20 | 2022-10-25 | 浙江锋华创芯微电子有限公司 | Digital display device and method on nixie tube based on single-wire communication |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 215123 No. 28, Xinchang Road, Suzhou, Jiangsu Patentee after: Suzhou Iron Technology Co., Ltd. Address before: Suzhou City, Jiangsu province 215123 wangdun Road, Suzhou Industrial Park, No. 188 Patentee before: Suzhou Iron Technology Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |