CN1291290C - Scanning matrix for programmeable controller switch input - Google Patents
Scanning matrix for programmeable controller switch input Download PDFInfo
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- CN1291290C CN1291290C CN 200410014875 CN200410014875A CN1291290C CN 1291290 C CN1291290 C CN 1291290C CN 200410014875 CN200410014875 CN 200410014875 CN 200410014875 A CN200410014875 A CN 200410014875A CN 1291290 C CN1291290 C CN 1291290C
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Abstract
The present invention discloses a scanning matrix which can be used for the switching value input of a programmeable controller. A matrix circuit is arranged between an input module input point and an output module output point, and one end of a selection line and one end of an input line in the matrix circuit are respectively connected with the output module output point and the input module input point in order; the output point outputs pulse signals orderly in a circulation mode, and at the same moment, only one path of output selection line exists; in the pulse signal circulation period, the on-off state of a corresponding input line is read into a PLC; a switching value signal monitored by the input module is the product of the number of input module points and the number of output module points so that more switching values are monitored by using very few switching value input points. Under the condition of satisfying a control requirement, the cost of a control system is greatly reduced.
Description
Technical field
The present invention relates to the Controlled by Programmable Controller system, specifically relate to a kind of scan matrix that can be used for the input of Programmable Logic Controller switching value.
Background technology
In industrial process control in the industry, Programmable Logic Controller (PLC) has become main application means, and it is programming mode easily, application mode flexibly, and wide applications is subjected to liking of numerous Mechanic Engineers deeply.
The structure of most of PLC is to be basic I/O unit with module, and in industrial process control usually, the major part that the PLC input block is monitored is the switching value signal, and the variation of switching value signal is not little 1 second.Use the connected mode of traditional PLC input block, an input point of input block can only be monitored a way switch amount signal.With 16 road load modules is example, needs 250 input points if any engineering project, then need be with 16 load modules, at least 2 frames, 2 power supplys, 2 interface modules etc.Above-mentioned control mode realizes an actual Engineering Control object, and it is higher to control cost.
Summary of the invention
Technical matters to be solved by this invention provides a kind of scan matrix that can be used for the input of Programmable Logic Controller switching value, to reach the purpose of monitoring more switching values with switching value input point seldom.
For solving the problems of the technologies described above, the technical scheme that adopts is, a kind of scan matrix that can be used for the input of Programmable Logic Controller switching value, comprise load module, it is characterized in that: be provided with a matrix circuit between a load module input point and an output module output point, the route selection in the matrix circuit is connected with the output module output point; One end of scan matrix incoming line is connected with the load module input point, and the other end is connected with the common point of load module by current-limiting resistance; Be provided with switch contact and the diode that is connected in series between described route selection and the scan matrix incoming line, switch contact is connected with described route selection, diode cathode is connected with described scan matrix incoming line.Utilize the output module output point as line selection, the PLC input point can monitor switching value by the scan matrix incoming line and change.
A kind of scan matrix that can be used for the input of Programmable Logic Controller switching value, described output module output point output cam pulse producer pulse signal.The output point output pulse signal that circulates successively, synchronization can only have one tunnel output route selection, and in the pulse signal cycle period, the on off state on the corresponding scan matrix incoming line is read into PLC.
A kind of scan matrix that can be used for the input of Programmable Logic Controller switching value, an end of route selection in the described matrix circuit and scan matrix incoming line is connected with the load module input point with the output module output point respectively successively.
A kind of scan matrix that can be used for the input of Programmable Logic Controller switching value, owing to adopted said structure, and prior art is compared: be provided with a matrix circuit between a load module input point and an output module output point, an end of route selection in the matrix circuit and scan matrix incoming line is connected with the load module input point with the output module output point respectively successively; The output point output pulse signal that circulates successively, synchronization can only have one tunnel output route selection, and in the pulse signal cycle period, the on off state on the corresponding scan matrix incoming line is read into PLC; The switching value signal that load module is monitored is the product that load module is counted and counted with output module, has realized the more switching values of switching value input point monitoring with seldom.Under the situation that satisfies the control requirement, significantly reduced the control system cost.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments;
Fig. 1 can be used for the scanning matrix circuit schematic diagram of Programmable Logic Controller switching value input for the present invention is a kind of;
Fig. 2 is a cam pulses generator output waveform synoptic diagram of the present invention;
In Fig. 1,1, load module; 2 output modules; 3 matrix circuits; 4 route selections; 5, scan matrix incoming line; 6, current-limiting resistance; 7, concentric line; 8, switch contact; 9, diode.
Embodiment
As shown in Figure 1, a kind of scan matrix that can be used for the input of Programmable Logic Controller switching value, comprise load module, be provided with a matrix circuit 3 between 16 load module 1 input points and 16 output module 2 output points, 16 route selections 4 in the matrix circuit 3 are connected with output module 2 output points respectively; One end of 16 scan matrix incoming lines 5 is connected with load module 1 input point respectively, and the other end is connected with the common point (COM) 7 of load module 1 by current-limiting resistance 6.Be provided with switch contact 8 and the diode 9 that is connected in series between 16 route selections 4 and the 16 scan matrix incoming lines 5, switch contact 8 is connected with route selection 4, and diode 9 negative poles are connected with scan matrix incoming line 5.Output module 2 output point output cam pulse producer pulse signals.Referring to Fig. 2, the output module 2 output points output pulse signal that circulates successively, pulse signal is the high level square-wave signal, synchronization can only have one tunnel output route selection 4, in 320MS pulse signal cycle period, the on off state on corresponding 16 scan matrix incoming lines 5 is read in PLC successively.Realized monitoring to 256 switching signals.
The present invention mainly is at the expansion technique of switching value input, if the switching value input point is many more in the engineering, then adopts effect of the present invention obvious more; If switching value input point effect at least is just not obvious.
Though described the present invention by embodiment, the spirit and scope of the present invention are limited by claims.
Claims (2)
1, a kind of scan matrix that can be used for the input of Programmable Logic Controller switching value, comprise load module (1), it is characterized in that: be provided with a matrix circuit (3) between a load module (1) input point and an output module (2) output point, the route selection (4) in the matrix circuit (3) is connected with output module (2) output point; One end of scan matrix incoming line (5) is connected with load module (1) input point, and the other end is connected with the common point (7) of load module (1) by current-limiting resistance (6);
Be provided with switch contact (8) and the diode (9) that is connected in series between described route selection (4) and the scan matrix incoming line (5), switch contact (8) is connected with described route selection (4), diode (9) negative pole is connected with described scan matrix incoming line (5).
2, a kind of scan matrix that can be used for the input of Programmable Logic Controller switching value according to claim 1 is characterized in that: described output module (2) output point output cam pulse producer pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014875 CN1291290C (en) | 2004-05-13 | 2004-05-13 | Scanning matrix for programmeable controller switch input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014875 CN1291290C (en) | 2004-05-13 | 2004-05-13 | Scanning matrix for programmeable controller switch input |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1580995A CN1580995A (en) | 2005-02-16 |
| CN1291290C true CN1291290C (en) | 2006-12-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410014875 Expired - Fee Related CN1291290C (en) | 2004-05-13 | 2004-05-13 | Scanning matrix for programmeable controller switch input |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1291290C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477349B (en) * | 2009-01-13 | 2012-05-30 | 上海优熠电子科技有限公司 | Amount-adjustable intelligent switch and its implementing method |
| CN102522983B (en) * | 2011-12-16 | 2014-06-04 | 宝鸡石油机械有限责任公司 | Matrix array switching value driver |
| CN112305983A (en) * | 2019-07-30 | 2021-02-02 | 沈阳海通机器人系统有限公司 | Storehouse position detecting system |
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2004
- 2004-05-13 CN CN 200410014875 patent/CN1291290C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1580995A (en) | 2005-02-16 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| 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: 20061220 Termination date: 20160513 |