CN104516307A - PLC (programmable logic controller) with level signal output mode configuration function - Google Patents
PLC (programmable logic controller) with level signal output mode configuration function Download PDFInfo
- Publication number
- CN104516307A CN104516307A CN201410791365.0A CN201410791365A CN104516307A CN 104516307 A CN104516307 A CN 104516307A CN 201410791365 A CN201410791365 A CN 201410791365A CN 104516307 A CN104516307 A CN 104516307A
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- plc
- triode
- level signal
- signal output
- described switch
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- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000011664 signaling Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1176—I-O signal processing, adaption, conditioning, conversion of signal levels
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Programmable Controllers (AREA)
Abstract
The invention discloses a PLC (programmable logic controller) with a level signal output mode configuration function. The PLC comprises a PLC internal processing circuit, an output circuit and a level signal output mode conversion circuit. The output circuit comprises a plurality of triodes, a base electrode of each triode is electrically connected with the PLC internal processing circuit, and a collector electrode of each triode is electrically connected with a corresponding output terminal. The level signal output mode conversion circuit comprises a plurality of resistors in parallel connection, one end of each resistor is connected with the collector electrode of the corresponding triode and the corresponding output terminal, and the other end of each resistor is connected with a power source end through the same switch. By the PLC, conversion among PLC output level signals is achieved through downward pulling or upward pulling of the resistors under PLC internal integration without replacement of the PLC, and requirements of different input level signals of an external circuit are met, so that production cost is saved, technology complexity is lowered, time is saved, and working progress is accelerated.
Description
Technical field
The present invention relates to industrial automation network control system field, particularly relate to a kind of PLC of configurable level signal output mode.
Background technology
Current, PLC(Programmable Logic Controller, programmable logic controller (PLC)) with its reliable and stable advantage widespread use in industrial automation system field, but in actual product, general PLC often can only export a kind of level signal (as high signal or low signal), when external circuit needs another kind of level input signal, current PLC can not meet the demand of this external circuits.
In prior art, there are two kinds of methods can realize meeting the requirement of this external circuits: one, to be changed by current PLC, are the PLC with another kind of Level output signal; The conversion of Level output signal two, is carried out at the external drop-down or pull-up resistor of current PLC.Inventor finds, the equal Shortcomings part of these two kinds of methods, and its weak point is: in first method, adds production cost and process complexity; In second method, the external resistance matched cannot be found in time, even if there is the resistance matched, but add the wiring between PLC, thus waste the plenty of time and delayed the progress of work.
Summary of the invention
Technical matters to be solved by this invention is the PLC providing a kind of configurable level signal output mode, without the need to changing PLC and at the inner integrated drop-down or pull-up resistor of PLC, realize the conversion between PLC outputs level signals, meet the different incoming level demand signals of external circuits, thus save production cost and process complexity, and save the time, improve the progress of work.
In order to solve the problems of the technologies described above, embodiments provide a kind of PLC of configurable level signal output mode, comprising:
One PLC internal processing circuitry;
One output circuit, comprises multiple triode, and wherein, the base stage of each triode is all electrically connected with described PLC internal processing circuitry, and collector is all electrically connected with a corresponding lead-out terminal;
One level signal output mode change-over circuit, comprises the resistance of multiple parallel connection, and wherein, one end of each resistance all connects with the collector of a corresponding triode and lead-out terminal, and the other end is all connected with power end via same switch.
Wherein, when described multiple triode is positive-negative-positive, the emitter of each triode is all connected with positive voltage source, and the power end that collector all connects to same described switch via the resistance of its correspondence is common electrical pressure side.
Wherein, when load circuit needs the voltage of input low level effective model, described switch closes; When load circuit needs the voltage of input high level effective model, described switch disconnects.
Wherein, when described multiple triode is NPN type, the emitter of each triode all with common electrical press bond, the power end that collector all connects to same described switch via the resistance of its correspondence is positive voltage source.
Wherein, when load circuit needs the voltage of input low level effective model, described switch disconnects; When load circuit needs the voltage of input high level effective model, described switch closes.
Wherein, described switch is toggle switch, manually selects its closed and disconnected state.
Wherein, described switch is relay, adjusts its closed and disconnected state by the mode of programming to PLC.
Implement the embodiment of the present invention, there is following beneficial effect:
In embodiments of the present invention, due to transfer resistance all built-in in each road signaling conversion circuit of PLC, according to the difference of incoming level signal, when resistance selection device realizes the conducting of one or more signaling conversion circuit, built-in transfer resistance is made to carry out pullup or pulldown to the voltage of incoming level signal, thus the conversion realized between PLC outputs level signals, meet the different incoming level demand signals of external circuits, thus save production cost and process complexity, and save the time, improve the progress of work.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, the accompanying drawing obtaining other according to these accompanying drawings still belongs to category of the present invention.
The structural representation that the PLC of the configurable level signal output mode that Fig. 1 provides for the embodiment of the present invention one is connected with load circuit;
Another structural representation that the PLC of the configurable level signal output mode that Fig. 2 provides for the embodiment of the present invention one is connected with load circuit;
The structural representation that the PLC of the configurable level signal output mode that Fig. 3 provides for the embodiment of the present invention two is connected with load circuit;
Another structural representation that the PLC of the configurable level signal output mode that Fig. 4 provides for the embodiment of the present invention two is connected with load circuit.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As depicted in figs. 1 and 2, the embodiment of the present invention one provides a kind of PLC of configurable level signal output mode, comprising:
One PLC internal processing circuitry;
One output circuit, comprises multiple triode, and wherein, the base stage of each triode is all electrically connected with PLC internal processing circuitry, and collector is all electrically connected with a corresponding lead-out terminal;
One level signal output mode change-over circuit, comprises the resistance of multiple parallel connection, and wherein, one end of each resistance all connects with the collector of a corresponding triode and lead-out terminal, and the other end is all connected with power end via same switch.
In inventive embodiments, multiple triode is positive-negative-positive, and the emitter of each triode is all connected with positive voltage source L+, and the power end that collector all connects to same switch via the resistance of its correspondence is common electrical pressure side M.
Switch is toggle switch, manually selects its closed and disconnected state; Or switch is relay, adjust its closed and disconnected state by the mode of programming to PLC.
As shown in Figure 1, when load circuit needs the voltage of input low level effective model, switch closes; As shown in Figure 2, when load circuit needs the voltage of input high level effective model, switch disconnects.
As shown in Figure 3 and Figure 4, the embodiment of the present invention two additionally provides a kind of PLC of configurable level signal output mode, comprising:
One PLC internal processing circuitry;
One output circuit, comprises multiple triode, and wherein, the base stage of each triode is all electrically connected with PLC internal processing circuitry, and collector is all electrically connected with a corresponding lead-out terminal;
One level signal output mode change-over circuit, comprises the resistance of multiple parallel connection, and wherein, one end of each resistance all connects with the collector of a corresponding triode and lead-out terminal, and the other end is all connected with power end via same switch.
In inventive embodiments, multiple triode is NPN type, and the emitter of each triode is all connected with common electrical pressure side M, and the power end that collector all connects to same switch via the resistance of its correspondence is positive voltage source L+.
Switch is toggle switch, manually selects its closed and disconnected state; Or switch is relay, adjust its closed and disconnected state by the mode of programming to PLC.
As shown in Figure 3, when load circuit needs the voltage of input low level effective model, switch disconnects; As shown in Figure 4, when load circuit needs the voltage of input high level effective model, switch closes.
Implement the embodiment of the present invention, there is following beneficial effect:
In embodiments of the present invention, due to transfer resistance all built-in in each road signaling conversion circuit of PLC, according to the difference of incoming level signal, when resistance selection device realizes the conducting of one or more signaling conversion circuit, built-in transfer resistance is made to carry out pullup or pulldown to the voltage of incoming level signal, thus the conversion realized between PLC outputs level signals, meet the different incoming level demand signals of external circuits, thus save production cost and process complexity, and save the time, improve the progress of work.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a PLC for configurable level signal output mode, is characterized in that, comprising:
One PLC internal processing circuitry;
One output circuit, comprises multiple triode, and wherein, the base stage of each triode is all electrically connected with described PLC internal processing circuitry, and collector is all electrically connected with a corresponding lead-out terminal;
One level signal output mode change-over circuit, comprises the resistance of multiple parallel connection, and wherein, one end of each resistance all connects with the collector of a corresponding triode and lead-out terminal, and the other end is all connected with power end via same switch.
2. PLC as claimed in claim 1, it is characterized in that, when described multiple triode is positive-negative-positive, the emitter of each triode is all connected with positive voltage source, and the power end that collector all connects to same described switch via the resistance of its correspondence is common electrical pressure side.
3. PLC as claimed in claim 2, is characterized in that, when load circuit needs the voltage of input low level effective model, described switch closes; When load circuit needs the voltage of input high level effective model, described switch disconnects.
4. PLC as claimed in claim 1, it is characterized in that, when described multiple triode is NPN type, the emitter of each triode all with common electrical press bond, the power end that collector all connects to same described switch via the resistance of its correspondence is positive voltage source.
5. PLC as claimed in claim 4, is characterized in that, when load circuit needs the voltage of input low level effective model, described switch disconnects; When load circuit needs the voltage of input high level effective model, described switch closes.
6. the PLC according to any one of claim 1 to 5, is characterized in that, described switch is toggle switch, manually selects its closed and disconnected state.
7. the PLC according to any one of claim 1 to 5, is characterized in that, described switch is relay, adjusts its closed and disconnected state by the mode of programming to PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410791365.0A CN104516307B (en) | 2014-12-19 | 2014-12-19 | A kind of PLC of configurable level signal output mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410791365.0A CN104516307B (en) | 2014-12-19 | 2014-12-19 | A kind of PLC of configurable level signal output mode |
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| Publication Number | Publication Date |
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| CN104516307A true CN104516307A (en) | 2015-04-15 |
| CN104516307B CN104516307B (en) | 2019-03-29 |
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| CN201410791365.0A Active CN104516307B (en) | 2014-12-19 | 2014-12-19 | A kind of PLC of configurable level signal output mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066878A (en) * | 2018-08-31 | 2018-12-21 | 维沃移动通信有限公司 | A kind of power-supply system |
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|---|---|---|---|---|
| EP0131695A1 (en) * | 1983-07-16 | 1985-01-23 | VDO Adolf Schindling AG | Electrical circuit for controlling a direct current, in particular for a variable luminosity car instrument panel illumination system |
| EP0369021A1 (en) * | 1988-04-22 | 1990-05-23 | Fanuc Ltd. | Output circuit |
| US5444309A (en) * | 1993-05-14 | 1995-08-22 | Eaton Corporation | Reduced wattage PLC interface |
| JPH08162931A (en) * | 1994-11-29 | 1996-06-21 | Nippondenso Co Ltd | Switching device |
| CN1396695A (en) * | 2000-12-28 | 2003-02-12 | 通用电气范努克北美自动化公司 | Method and device of current regulating for programmable logical controller |
| CN102142834A (en) * | 2009-11-25 | 2011-08-03 | 松下电工神视株式会社 | Digital output circuit |
| CN101534050B (en) * | 2008-03-10 | 2011-12-07 | 株式会社理光 | Dc-dc converter |
| KR101297505B1 (en) * | 2011-11-30 | 2013-08-16 | 엘에스산전 주식회사 | A PLC output module |
-
2014
- 2014-12-19 CN CN201410791365.0A patent/CN104516307B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0131695A1 (en) * | 1983-07-16 | 1985-01-23 | VDO Adolf Schindling AG | Electrical circuit for controlling a direct current, in particular for a variable luminosity car instrument panel illumination system |
| EP0369021A1 (en) * | 1988-04-22 | 1990-05-23 | Fanuc Ltd. | Output circuit |
| US5444309A (en) * | 1993-05-14 | 1995-08-22 | Eaton Corporation | Reduced wattage PLC interface |
| JPH08162931A (en) * | 1994-11-29 | 1996-06-21 | Nippondenso Co Ltd | Switching device |
| CN1396695A (en) * | 2000-12-28 | 2003-02-12 | 通用电气范努克北美自动化公司 | Method and device of current regulating for programmable logical controller |
| CN101534050B (en) * | 2008-03-10 | 2011-12-07 | 株式会社理光 | Dc-dc converter |
| CN102142834A (en) * | 2009-11-25 | 2011-08-03 | 松下电工神视株式会社 | Digital output circuit |
| KR101297505B1 (en) * | 2011-11-30 | 2013-08-16 | 엘에스산전 주식회사 | A PLC output module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066878A (en) * | 2018-08-31 | 2018-12-21 | 维沃移动通信有限公司 | A kind of power-supply system |
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| CN104516307B (en) | 2019-03-29 |
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