CN203825416U - PLC-based variable display device - Google Patents
PLC-based variable display device Download PDFInfo
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- CN203825416U CN203825416U CN201420194373.2U CN201420194373U CN203825416U CN 203825416 U CN203825416 U CN 203825416U CN 201420194373 U CN201420194373 U CN 201420194373U CN 203825416 U CN203825416 U CN 203825416U
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- chip microcomputer
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- emitting diode
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Abstract
The utility model discloses a PLC-based variable display device. The PLC-based variable display device comprises an LED display (21), a single-chip microcomputer (22) and a power supply module (23); the LED display (21) comprises an LED display driver module (24) and an LED seven-segment code module (25); the single-chip microcomputer (22) is connected with a communication port of a PLC module to read internal variables of the single-chip microcomputer (22), an output end of the single-chip microcomputer (22) is connected with an input end of the LED display (21), and the LED display (21) displays information transmitted from the single-chip microcomputer in a real-time manner by utilizing the LED seven-segment code module (25); and the power supply module supplies power for the single-chip microcomputer, and the LED display is powered by the single-chip microcomputer. Real-time display of the variables is achieved, and an industrial field can be more convenient to monitor.
Description
Technical field
The utility model relates to information electronic and control technology, relates in particular to a kind of variable display device based on PLC, can be applicable to and has in the monitoring and controlling system that S7-200PLC carries out data acquisition.
Background technology
Programmable logic controller (PLC) (Programmable Logic Controller, PLC), it adopts a class programmable memory, for its internally stored program, actuating logic computing, sequential control, regularly, the user oriented instruction such as counting and arithmetical operation, and by numeral or analog pattern input/output various types of machinery of control or production run.
S7-200PLC is that 200 series that Siemens is released are controlled product automatically, its stability, good reliability, and cheap, thereby obtained at home large-scale application, receive praises from customers, the communications protocol of S7-200PLC is supported MPI, PPI and free interface communication agreement, and PPI agreement is one, by LED seven segment code, S7-200PLC built-in variable is shown, significant to industry spot and application scenarios.
Summary of the invention
The purpose of this utility model is read in real time the variate-value of PLC inside and show in real time.
The utility model adopts following technical scheme:
A variable display device based on PLC, comprises light-emitting diode display, single-chip microcomputer and power module, and light-emitting diode display comprises LED display driver module and LED seven segment code module; Single-chip microcomputer is connected and is read its built-in variable by the communication port with PLC module, and the output terminal of single-chip microcomputer is connected with the input end of light-emitting diode display, and the information that light-emitting diode display transmits single-chip microcomputer utilizes LED seven segment code module to show in real time; Power module is single-chip microcomputer power supply, and light-emitting diode display is powered by single-chip microcomputer.The utility model has been realized the real-time demonstration of variable, can monitor more easily industry spot.
Between described single-chip microcomputer and PLC module, adopt PPI agreement to carry out communication.
Between described single-chip microcomputer and PLC module, adopt Shielded Twisted Pair to be connected.
The beneficial effects of the utility model:
1, only take communication port of PLC, do not affect the original performance of PLC, do not need PLC to carry out extra inside programming.
2, there is the features such as easy for installation, simple in structure, practical.
3, there is shielding external disturbance ability.
Accompanying drawing explanation
Fig. 1 is the light-emitting diode display circuit diagram of a kind of embodiment of the utility model;
Fig. 2 is the single chip circuit figure of a kind of embodiment of the utility model;
Fig. 3 is the principle schematic of a kind of embodiment of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
A variable display device based on PLC, comprises light-emitting diode display 21, single-chip microcomputer 22 and power module 23, and light-emitting diode display 21 comprises LED display driver module 24 and LED seven segment code module 25; Single-chip microcomputer 22 is connected and is read its built-in variable by the communication port with PLC module, and the output terminal of single-chip microcomputer 23 is connected with the input end of light-emitting diode display 21, and the information that light-emitting diode display 21 transmits single-chip microcomputer utilizes LED seven segment code module 25 to show in real time; Power module is single-chip microcomputer power supply, and light-emitting diode display is powered by single-chip microcomputer.
Embodiment mono-
Single-chip microcomputer 22 adopts the chip of STC89C52 model, and LED display driver module 24 adopts the chip that model is MAX7219, and it is S7-200PLC module that PLC adopts model.
As shown in Figure 1, LED seven segment code module 25 comprises LED seven segment code 1 module, the 2nd LED seven segment code 2 modules, the 3rd LED seven segment code 3 modules and the 4th LED seven segment code 4, the input pin 5 of the one LED seven segment code 1 module connects the DIG0 pin 9 of single-chip microcomputer, the input pin 6 of the 2nd LED seven segment code 2 modules connects the DIG1 pin 10 of single-chip microcomputer, the input pin 7 of the 3rd LED seven segment code 3 modules connects the DIG2 pin 11 of single-chip microcomputer, the input pin 8 of the 4th LED seven segment code 4 modules connects the DIG3 pin 12 of single-chip microcomputer, a in each LED seven segment code is connected with the A of MAX7219, same b and B corresponding connection by that analogy.
As illustrated in fig. 1 and 2, the DIN pin 13 of light-emitting diode display driver module 24 connects the P1.0 pin 16 of single-chip microcomputer, the LOAD pin 14 of light-emitting diode display driver module connects the P1.2 pin 18 of single-chip microcomputer, and the CLK pin 15 of light-emitting diode display driver module connects the P1.1 pin 17 of single-chip microcomputer.The P3.0 pin 19 of single-chip microcomputer is connected with the communication A mouth of S7-200PLC module 3, and P3.1 pin 20 is for being connected with S7-200PLC module 3 B mouths, and S7-200PLC module 3 is single-chip microcomputer 22 power supplies.
As shown in Figure 3, single-chip microcomputer 22 STC89C52 adopt PPI agreement to be connected with communication port B with S7-200PLC communication port A, constantly read S7-200PLC inside modules variable, and pass to light-emitting diode display 21, seven segment code module 25 by light-emitting diode display shows in real time, the object that reaches industry spot Real-time Collection and show.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection domain of the present invention; The technology that the present invention does not relate to all can be realized by prior art.
Claims (3)
1. the variable display device based on PLC, is characterized in that: comprise light-emitting diode display (21), single-chip microcomputer (22) and power module (23), light-emitting diode display (21) comprises LED display driver module (24) and LED seven segment code module (25); Single-chip microcomputer (22) is connected and is read its built-in variable by the communication port with PLC module, the output terminal of single-chip microcomputer (23) is connected with the input end of light-emitting diode display (21), and the information that light-emitting diode display (21) transmits single-chip microcomputer utilizes LED seven segment code module (25) to show in real time; Power module is single-chip microcomputer power supply, and light-emitting diode display is powered by single-chip microcomputer.
2. a kind of variable display device based on PLC according to claim 1, is characterized in that: between single-chip microcomputer (22) and PLC module, adopt PPI agreement to carry out communication.
3. a kind of variable display device based on PLC according to claim 1, is characterized in that: between single-chip microcomputer (22) and PLC module, adopt Shielded Twisted Pair to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420194373.2U CN203825416U (en) | 2014-04-22 | 2014-04-22 | PLC-based variable display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420194373.2U CN203825416U (en) | 2014-04-22 | 2014-04-22 | PLC-based variable display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825416U true CN203825416U (en) | 2014-09-10 |
Family
ID=51480894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420194373.2U Expired - Fee Related CN203825416U (en) | 2014-04-22 | 2014-04-22 | PLC-based variable display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203825416U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112198786A (en) * | 2020-04-27 | 2021-01-08 | 昇显微电子(苏州)有限公司 | Method and device for realizing digital clock |
-
2014
- 2014-04-22 CN CN201420194373.2U patent/CN203825416U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112198786A (en) * | 2020-04-27 | 2021-01-08 | 昇显微电子(苏州)有限公司 | Method and device for realizing digital clock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20210422 |