CN108897275A - A kind of PLC can customize I/O mouthfuls - Google Patents
A kind of PLC can customize I/O mouthfuls Download PDFInfo
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- CN108897275A CN108897275A CN201810783317.5A CN201810783317A CN108897275A CN 108897275 A CN108897275 A CN 108897275A CN 201810783317 A CN201810783317 A CN 201810783317A CN 108897275 A CN108897275 A CN 108897275A
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- 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
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- 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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Abstract
This application discloses a kind of PLC that can customize I/O mouthfuls, including pluggable input/output I/O module, outside is equipped with the pin suitable for input circuit and output circuit, has been internally integrated core circuit；When core circuit is output circuit, I/O module is output module, and when core circuit is input circuit, I/O module is input module；It is provided with the master control borad of the insert row to match with the pin of I/O module.The input/output end port of the PLC of the application can be input port or output port using flexible setting, can select I/O mouthfuls of immediate master control borads of always counting according to actual needs, reduce the cost of PLC to a certain extent.Meanwhile if input/output end port failure need to only be replaced accordingly, does not need to send entire PLC and repair, maintenanceability is good, uses more convenient.
Description
Technical field
This application involves technical field of electronic equipment, more particularly to a kind of PLC that can customize I/O mouthfuls.
Background technique
PLC (Programmable Logic Controller, programmable logic controller (PLC)) is one kind exclusively in industry
The electronic device of digital operation applied and designed under environment, is that most common control equipment, PLC include by master control now
The master control version that device and peripheral circuit are constituted.
I/O (Input/Output, input/output) mouth number of traditional PLC is fixed, is manufacturer by standard I/O point
Number design, for example, 32MRPLC (16 points of inputs, the output of 16 point relays), (20 points of inputs, 20 transistors are defeated by 40MT-PLC
Out), 64MRPLC (32 points of inputs, the output of 32 point relays) etc..Input port can not be revised as output port by user's later period,
Output port is revised as input port, cannot cut randomly collocation；Although I/O number can be extended by expansion module,
But resulting cost can also rise with it.In practical engineering project, it is frequently encountered input port actually required (or output end
Mouthful) quantity than the input port (or output port) of used PLC master control borad quantity more than situation, in order to meet need
It wants, often selection has more I/O mouthfuls of a PLC master control borad, and in view of the design of manufacturer, the input port of PLC master control borad (or it is defeated
Exit port) quantity the case where being exactly equal to the quantity of input port actually required (or output port) it is fewer and fewer, therefore
It usually will cause I/O mouthfuls of wastes, also lead to increased costs.Meanwhile once input/output end port failure will lead to entire PLC
It is unable to operate normally, at this moment needs to send entire PLC and repair, maintenanceability is poor, extremely inconvenient.
Therefore, how a kind of scheme can solve above-mentioned technical problem is provided, is that those skilled in the art needs at present
It solves the problems, such as.
Summary of the invention
The purpose of the application is to provide a kind of PLC that can customize I/O mouthfuls, can be input with the I/O mouth of flexible setting PLC
Port or output port can select I/O mouthfuls of immediate master control borads of always counting according to actual needs, reduce to a certain extent
The cost of PLC, while maintenanceability is good, uses more convenient.
In order to solve the above technical problems, this application provides a kind of PLC that can customize I/O mouthfuls, including：
Pluggable input/output I/O module, outside is equipped with the pin suitable for input circuit and output circuit, internal
It is integrated with core circuit；When the core circuit is the output circuit, the I/O module is output module, when the core
When electrocardio road is the input circuit, the I/O module is input module；
It is provided with the master control borad of the insert row to match with the pin of the I/O module.
Preferably, the pin includes：
The positive pin of first voltage signal, the negative pin of first voltage signal, the positive pin of second voltage signal, second voltage signal
Negative pin, input pin, output pin and external equipment pin；
When the I/O module is the input module, the positive pin of the first voltage signal, the first voltage signal are negative
Pin, the positive pin of the second voltage signal, the negative pin of the second voltage signal, the input pin and the external equipment
Pin conducting, the external device pin are used to access the signal of external equipment output, after input circuit processing
The master control borad is inputed to by the input pin；
When the I/O module is the output module, the positive pin of the second voltage signal, the second voltage signal are negative
Pin, the output pin and external equipment pin conducting, so that the control signal of the master control borad passes through the output
External equipment is outputed signal to by the output pin after processing of circuit.
Preferably, the input circuit includes：
First resistor module, isolation module and second resistance module；
The first voltage signal positive pin of the first end of the first resistor module as the input module, with
The anode connection of one voltage signal, the second end of the first resistor module and the first input isolation end of the isolation module connect
It connects, the external equipment pin of the second input isolation end of the isolation module as the input module, with external equipment
It is connected by the external equipment pin, the external equipment pin passes through the negative pin of first voltage signal and described first
The cathode of voltage signal connects, the first output isolation end of the isolation module as the positive pin of second voltage signal, with
The anode connection of second voltage signal, the output of the second output isolation end of the isolation module as the input module
Pin is connect with the master control borad, is also connect with the first end of the second resistance module, and the second of the second resistance module
End is used as the negative pin of second voltage signal, connect with the cathode of the second voltage signal.
Preferably, the isolation module is TLP521-1 photoelectrical coupler；
The then first input isolation of the positive pin of the TLP521-1 photoelectrical coupler as the isolation module
End, the second input isolation end of the negative pin of the TLP521-1 photoelectrical coupler as the isolation module are described
The first output isolation end of the collector pin of TLP521-1 photoelectrical coupler as the isolation module, it is described
The second output isolation end of the emitter pin of TLP521-1 photoelectrical coupler as the isolation module.
Preferably, the input circuit further includes：
First light emitting diode, for indicating the I/O mouthfuls of conducting when itself shines；
The anode of first light emitting diode is connect with the second end of the first resistor module, and described first luminous two
The cathode of pole pipe is connect with the positive terminal of the first side of the isolation module.
Preferably, the output circuit includes：
3rd resistor module；
The first end of the 3rd resistor module is as the positive pin of second voltage signal, just with second voltage signal
Pole connection, the second end of the 3rd resistor module are drawn with external equipment by the external equipment as the output pin
Foot connection, the external equipment pin are connected by the cathode of the negative pin of second voltage signal and the second voltage signal
It connects.
Preferably, the output circuit further includes：
Second light emitting diode, for indicating the I/O mouthfuls of conducting when itself shines；
The anode of second light emitting diode is connect with the second end of the 3rd resistor module, and described second luminous two
The cathode of pole pipe is as the output pin.
Preferably, which is Embedded PLC.
This application provides a kind of PLC that can customize I/O mouthfuls, including pluggable input/output I/O module, external
Equipped with the pin for being suitable for input circuit and output circuit, it is internally integrated core circuit；When core circuit is output circuit,
I/O module is output module, and when core circuit is input circuit, I/O module is input module；It is provided with and I/O module
The master control borad for the insert row that pin matches.
The PLC of the application includes pluggable I/O module and the insert row that matches with the I/O module, outside the I/O module
The pin in portion had not only been contained as pin needed for input port, but also was contained as pin needed for output port, and I/O is passed through
The core circuit of inside modules determines that the I/O module is output module or input module, in application, by core circuit offer
Corresponding pin is connected in level signal, sends signal to master control borad as input port or exports master control borad as output port
The control signal for controlling external equipment, needs how many a input ports, is inserted into how many a input modules, needs how many outputs
Port is inserted into how many a output modules.As it can be seen that the input/output end port of the PLC of the application can be using flexible setting as input terminal
Mouth or output port, can select I/O mouthfuls of immediate master control borads of always counting according to actual needs, reduce to a certain extent
The cost of PLC.Meanwhile if input/output end port failure need to only be replaced accordingly, do not need to send entire PLC
It repairs, maintenanceability is good, uses more convenient.
Detailed description of the invention
It in order to more clearly explain the technical solutions in the embodiments of the present application, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of PLC that can customize I/O mouthfuls provided herein a kind of；
Fig. 2 is the knot of the input circuit inside the input module of PLC that can customize I/O mouthfuls provided herein a kind of
Structure schematic diagram；
Fig. 3 is the structural schematic diagram of the portion of external pin of input module shown in Fig. 2；
Fig. 4 is the structural schematic diagram of the external equipment pin of input module shown in Fig. 2；
Fig. 5 is the knot of the output circuit inside the output module of PLC that can customize I/O mouthfuls provided herein a kind of
Structure schematic diagram；
Fig. 6 is the structural schematic diagram of the portion of external pin of output module shown in fig. 5；
Fig. 7 is the structural schematic diagram of the external equipment pin of output module shown in fig. 5.
Specific embodiment
The core of the application is to provide a kind of PLC that can customize I/O mouthfuls, can be input with the I/O mouth of flexible setting PLC
Port or output port can select I/O mouthfuls of immediate master control borads of always counting according to actual needs, reduce to a certain extent
The cost of PLC, while maintenanceability is good, uses more convenient.
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Referring to FIG. 1, Fig. 1 is the structural schematic diagram of PLC that can customize I/O mouthfuls provided herein a kind of, including：
Pluggable input/output I/O module 1, outside is equipped with the pin suitable for input circuit and output circuit, internal
It is integrated with core circuit；When core circuit is output circuit, I/O module 1 is output module, when core circuit is input circuit
When, I/O module 1 is input module；
It is provided with the master control borad 2 of the insert row to match with the pin of I/O module 1.
Specifically, in order to solve the problems in the existing technology, I/O mouthfuls be can customize this application provides a kind of
PLC, wherein pluggable I/O module 1 is inserted on the insert row of master control borad 2 in which can be convenient, after insertion, the outside of I/O module 1
Pin connects external equipment and master control borad 2, and when I/O module 1 is internally integrated input circuit, I/O module 1 is as input
Port can issue signal to master control borad 2, such as external equipment is switch, and when closing the switch, I/O module 1 is by closure signal (level
Signal) master control borad 2 is inputed to, the simultaneously good correlative code of programming is compiled in advance on master control borad 2, according to the input signal master of external equipment
Control plate 2 performs corresponding processing；When I/O module 1 is internally integrated output circuit, I/O module 1 can be by master control as output port
The signal that plate 2 issues is to external equipment, for example, issuing signal, touching to external motor after master control borad 2 performs corresponding processing
Generator rotation.
It should be noted that in the prior art there is difference in the number amount and type of the pin of input port and output port
Place, this is related with output circuit and input circuit, and the pin of the outside of I/O module 1 is suitable for input circuit in the application, also fits
For output circuit, specifically, the identical pin that input circuit and output circuit need can be retained, it will be different
Pin, such as input circuit, to the input pin of 2 input signal of master control borad, output circuit is defeated to external equipment output signal
Pin out, is also arranged at the outside of I/O module 1, such I/O module 1 either input module or output module, in appearance
Identical, only internal core circuit will be different.So, the insert row being set on master control borad 2 is also just complete
It is identical, master control borad 2 need to be arranged multiple such insert rows, and insert row, which is arranged to input port or output port, to be allowed
User determines according to actual needs, for example, 8 insert rows can be set to 2 input ports, 6 output ports can also be by
It is arranged to 4 input ports, 4 output ports.
Further, since the pin of the outside of I/O module 1 is suitable for input circuit, it is also applied for output circuit, when I/O mould
Be not that whole pins can all work (conducting) when block 1 is inserted into insert row, there are extra pins for I/O module 1, only with
The relevant pin of internal core circuit can just work.
This application provides a kind of PLC that can customize I/O mouthfuls, including pluggable input/output I/O module, external
Equipped with the pin for being suitable for input circuit and output circuit, it is internally integrated core circuit；When core circuit is output circuit,
I/O module is output module, and when core circuit is input circuit, I/O module is input module；It is provided with and I/O module
The master control borad for the insert row that pin matches.
The PLC of the application includes pluggable I/O module and the insert row that matches with the I/O module, outside the I/O module
The pin in portion had not only been contained as pin needed for input port, but also was contained as pin needed for output port, and I/O is passed through
The core circuit of inside modules determines that the I/O module is output module or input module, in application, by core circuit offer
Corresponding pin is connected in level signal, sends signal to master control borad as input port or exports master control borad as output port
The control signal for controlling external equipment, needs how many a input ports, is inserted into how many a input modules, needs how many outputs
Port is inserted into how many a output modules.As it can be seen that the input/output end port of the PLC of the application can be using flexible setting as input terminal
Mouth or output port, can select I/O mouthfuls of immediate master control borads of always counting according to actual needs, reduce to a certain extent
The cost of PLC.Meanwhile if input/output end port failure need to only be replaced accordingly, do not need to send entire PLC
It repairs, maintenanceability is good, uses more convenient.
On the basis of the above embodiments：
The pin of embodiment as one preferred, I/O module 1 includes：
The positive pin of first voltage signal, the negative pin of first voltage signal, the positive pin of second voltage signal, second voltage signal
Negative pin, input pin, output pin and external equipment pin；
When I/O module 1 is input module, the positive pin of first voltage signal, the negative pin of first voltage signal, second voltage letter
Number positive pin, the negative pin of second voltage signal, input pin and the conducting of external equipment pin, external device pin are outer for accessing
The signal of equipment output is connect, to input to master control borad 2 by input pin after input circuit is handled；
I/O module 1 be output module when, the positive pin of second voltage signal, the negative pin of second voltage signal, output pin and
External equipment pin conducting, so that the control signal of master control borad 2 passes through output pin output signal after output circuit is handled
To external equipment.
It specifically, is not that whole pins can all work (conducting) when I/O module 1 is inserted into insert row, I/O module 1
When for input module, the positive pin of relevant to input circuit first voltage signal, the negative pin of first voltage signal, second voltage letter
Number positive pin, the negative pin of second voltage signal, input pin and external equipment pin these pins can be connected, and I/O module 1 is defeated
It is out also similar principle when module.
It should be noted that external equipment pin is for connection to external equipment, in general, external equipment pin can
Think two, such as the pin of the external equipments such as connection switch, motor, external equipment pin is unrelated with the signal on master control borad 2,
Function is directly determined by the circuit above the input/output module, remaining pin can be by voltage signal on master control borad 2 and right
Input/output TTL (Transistor Transistor Logic, the transistor-transistor logic level) level answered is drawn,
It also include the insert row corresponding to external equipment pin in the insert row of master control borad 2, while this corresponds to inserting for external equipment pin
Row may be coupled on a binding post, facilitate the connection of input/output end port and external equipment, and certainly, this corresponds to outer
Connect equipment pin insert row can also using other ways, the application it is not limited here, for the quantity of external equipment pin
It may be set according to actual conditions, the application is herein also without limitation.
Embodiment as one preferred, input circuit include：
First resistor module R1, isolation module U1 and second resistance module R2；
First voltage signal positive pin of the first end of first resistor module R1 as input module, with first voltage signal
Anode connection, the second end of first resistor module R1 inputs isolation end with the first of isolation module U1 and connect, isolation module U1
The second external equipment pin of the input isolation end as input module, connect with external equipment by external equipment pin, outside
It connects equipment pin to connect by the negative pin of first voltage signal with the cathode of first voltage signal, the first output of isolation module U1
Isolation end connect as the positive pin of second voltage signal with the anode of second voltage signal, the second of isolation module U1 export every
Output pin from end as input module, connect with master control borad 2, also connect with the first end of second resistance module R2, second
The second end of resistive module R2 is connect as the negative pin of second voltage signal with the cathode of second voltage signal.
Specifically, as shown in Figure 2, Figure 3 and Figure 4, Fig. 2 is the input circuit that input module is internally integrated, the IN of P1 in Fig. 3
End is the input pin of input module, and P2 is the signal input part of the external equipment of input module in Fig. 4, can connect one and connects
Terminal is connect with facilitating with external equipment.It is separated between input signal and master control borad 2 with isolation module U1, first resistor R1 is limit
Leakage resistance, an input pin of input pin IN connection master control borad 2.Assuming that P2 is connected to a control switch, one end is switched
It is connect with the end X, the other end is connect with the level of -24V, if closed the switch, the first lateral circuit of isolation module U1 is connected, then separately
One lateral circuit is also switched on, and input pin IN is high level, gives 2 high level signal of master control borad, illustrates that the input port is connected.
In addition, the structure of input circuit can also be other, and the application does not limit herein other than above-mentioned input circuit
It is fixed.
Embodiment as one preferred, isolation module U1 are TLP521-1 photoelectrical coupler；
Then the positive pin of TLP521-1 photoelectrical coupler inputs isolation end, TLP521-1 as the first of isolation module U1
The negative pin of photoelectrical coupler inputs isolation end, the collector of TLP521-1 photoelectrical coupler as the second of isolation module U1
Pin exports isolation end as the first of isolation module U1, and the emitter pin of TLP521-1 photoelectrical coupler is as isolation module
The second output isolation end of U1.
Specifically, in order to improve the anti-interference ability of PLC, there is Anti-interference Design in input circuit part.The application's is defeated
Enter circuit to separate input signal and master control borad 2 using TLP521-1 photoelectrical coupler before signal is input to master control borad 2, such as scheme
Shown in 2.For example, the switching signal that input circuit receives industrial field device converts a signal into master control borad by input circuit
2 receivable signals, so that PLC internal/external signal be allowed to meet electrical isolation.The input signal of the application can select direct current to input
Mode, electric current arrives 7mA 5 when signal is true.In view of the interference free performance of input circuit, the isolation of input circuit can be used
TLP521-1 is isolated, and can also use other isolation modules U1 or device, the application is it is not limited here.
Embodiment as one preferred, input circuit further include：
First light emitting diode D1, for indicating the I/O mouthfuls of conducting when itself shines；
The anode of first light emitting diode D1 is connect with the second end of first resistor module R1, the first light emitting diode D1's
Cathode is connect with the positive terminal of the first side of isolation module U1.
Specifically, in order to explicitly indicate that the state of I/O module 1, the input circuit of the application further includes first shining two
Pole pipe D1, as shown in Fig. 2, being used to indicate the switch state of the input port.When input circuit is connected, the first light emitting diode
D1 shines.Certainly, the first light emitting diode D1 can also be replaced with other indicating devices, such as buzzer etc., the application exists
This is without limitation.
Embodiment as one preferred, output circuit include：
3rd resistor module R3；
The first end of 3rd resistor module R3 connects as the positive pin of second voltage signal with the anode of second voltage signal
It connects, the second end of 3rd resistor module R3 is connect with external equipment by external equipment pin, external equipment as output pin
Pin is connect by the negative pin of second voltage signal with the cathode of second voltage signal.
Specifically, as shown in Fig. 5, Fig. 6 and Fig. 7, the Transistor-Transistor Logic level that master control borad 2 provides can be defeated after ULN2803 chip
OUT pin is arrived out, can directly drive relay etc..The output circuit of the application can be but be not limited to relay output side
Formula, this mode can drive DC load, the voltage swing wider range used, while bear take advantage of a situation overvoltage and overcurrent
Ability it is stronger.The rated current of PLC external equipment should be less than the output current driving ability of output circuit, it is therefore desirable to root
The output electric current of output circuit is determined according to actual conditions.
Specifically, the P5 in Fig. 7 is the output end that output module outputs signal to external equipment, can connect a wiring
Column is convenient to be connect with external equipment, such as motor etc..For example, directly driving relay via what ULN2803 chip obtained
Output is connected to OUT pin, is then connected to relay, and when it is conducting that OUT (output pin), which is arranged, output pin OUT is low electricity
Flat, long switch K1 closure, the both ends P5 are also switched on, and can control external equipment.
Correspondingly, according to the analysis above to input circuit and output circuit, it can be seen that I/O module 1 needs 8 and draws
Foot is not only suitable for above-mentioned input circuit to meet, and therefore only needs to be arranged on master control borad 2 suitable for above-mentioned output circuit
The insert row of 8 unified needles, 6 needle therein connect respectively the supply voltage of ± 24V, ± the 5V for being supplied to main controller operating voltage with
And input Transistor-Transistor Logic level signal, output Transistor-Transistor Logic level signal corresponding to master control borad 2, reference can be made to the P4 in P1 and Fig. 6 in Fig. 3,
This 6 signals can all be applicable in input circuit or output circuit, therefore, wherein 6 needle of socket on master control borad 2,
Connect above 6 signals, when input/output module is inserted into, corresponding 6 pins are inserted on this 6 needle thereon, can be to input/defeated
Module provides all kinds of voltages and input/output Transistor-Transistor Logic level out.For 2 external equipment pins on input/output module,
The two pins pass through the external input equipment of binding post, that is to say, that on the two pins and insert row corresponding two needle not by
Master control borad 2 influences, and directly determines function by the circuit above the input/output module.
Embodiment as one preferred, output circuit further include：
Second light emitting diode D2, for indicating the I/O mouthfuls of conducting when itself shines；
The anode of second light emitting diode D2 is connect with the second end of 3rd resistor module R3, the second light emitting diode D2's
Cathode is as output pin.
Specifically, in order to explicitly indicate that the state of I/O module 1, the output circuit of the application further includes second shining two
Pole pipe D2, as shown in figure 3, being used to indicate the switch state of the output port.When output circuit is connected, the second light emitting diode
D2 shines.Certainly, the second light emitting diode D2 can also be replaced with other indicating devices, such as buzzer etc., the application exists
This is without limitation.
Embodiment as one preferred, the PLC are Embedded PLC.
Specifically, the PLC main controller of the application can be the embedded soft PLC controller based on ARM microprocessor.It can be with
Programmed using C language, flexible control flow, can make will not PLC language programming personnel controlled using PLC, this is one
Kind SoftPLC technology.The I/O module 1 for cooperating the application with the master control borad 2 of embedded soft PLC, can make PLC using more flexible,
Cost optimization.Certainly, the PLC of the application can also be other, and the application is it is not limited here.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For method disclosed in embodiment
For, since it is corresponding with system disclosed in embodiment, so being described relatively simple, related place is defended oneself referring to Account Dept
It is bright.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, being wanted by what sentence " including one " limited
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of PLC that can customize I/O mouthfuls, which is characterized in that including：
Pluggable input/output I/O module, outside are equipped with the pin suitable for input circuit and output circuit, are internally integrated
There is core circuit；When the core circuit is the output circuit, the I/O module is output module, when the core electricity
When road is the input circuit, the I/O module is input module；
It is provided with the master control borad of the insert row to match with the pin of the I/O module.
2. the PLC according to claim 1 that can customize I/O mouthfuls, which is characterized in that the pin includes：
The positive pin of first voltage signal, the negative pin of first voltage signal, the positive pin of second voltage signal, second voltage signal are negative to be drawn
Foot, input pin, output pin and external equipment pin；
When the I/O module is the input module, the positive pin of the first voltage signal, the first voltage signal are negative to be drawn
Foot, the positive pin of the second voltage signal, the negative pin of the second voltage signal, the input pin and the external equipment draw
Foot conducting, the external device pin are used to access the signal of external equipment output, to lead to after input circuit processing
It crosses the input pin and inputs to the master control borad；
When the I/O module is the output module, the positive pin of the second voltage signal, the second voltage signal are negative to be drawn
Foot, the output pin and external equipment pin conducting, so that the control signal of the master control borad is electric by the output
External equipment is outputed signal to by the output pin after the processing of road.
3. the PLC according to claim 1 that can customize I/O mouthfuls, which is characterized in that the input circuit includes：
First resistor module, isolation module and second resistance module；
The first voltage signal positive pin of the first end of the first resistor module as the input module, with the first electricity
The anode connection of signal is pressed, the second end of the first resistor module is connect with the first input isolation end of the isolation module,
The external equipment pin of the second input isolation end of the isolation module as the input module, passes through with external equipment
The external equipment pin connection, the external equipment pin pass through the negative pin of first voltage signal and the first voltage
The cathode of signal connects, and the first output isolation end of the isolation module is as the positive pin of second voltage signal, with second
Second output isolation end of the anode connection of voltage signal, the isolation module draws as the output of the input module
Foot is connect with the master control borad, is also connect with the first end of the second resistance module, the second end of the second resistance module
As the negative pin of second voltage signal, it is connect with the cathode of the second voltage signal.
4. the PLC according to claim 3 that can customize I/O mouthfuls, which is characterized in that the isolation module is TLP521-1
Photoelectrical coupler；
The then first input isolation end of the positive pin of the TLP521-1 photoelectrical coupler as the isolation module, institute
The second input isolation end of the negative pin as the isolation module of TLP521-1 photoelectrical coupler is stated, it is described
The first output isolation end of the collector pin of TLP521-1 photoelectrical coupler as the isolation module, it is described
The second output isolation end of the emitter pin of TLP521-1 photoelectrical coupler as the isolation module.
5. the PLC according to claim 3 that can customize I/O mouthfuls, which is characterized in that the input circuit further includes：
First light emitting diode, for indicating the I/O mouthfuls of conducting when itself shines；
The anode of first light emitting diode is connect with the second end of the first resistor module, first light emitting diode
Cathode connect with the positive terminal of the first side of the isolation module.
6. the PLC according to claim 1 that can customize I/O mouthfuls, which is characterized in that the output circuit includes：
3rd resistor module；
The first end of the 3rd resistor module connects as the positive pin of second voltage signal with the anode of second voltage signal
It connects, the second end of the 3rd resistor module is connected with external equipment by the external equipment pin as the output pin
It connects, the external equipment pin is connect by the negative pin of second voltage signal with the cathode of the second voltage signal.
7. the PLC according to claim 6 that can customize I/O mouthfuls, which is characterized in that the output circuit further includes：
Second light emitting diode, for indicating the I/O mouthfuls of conducting when itself shines；
The anode of second light emitting diode is connect with the second end of the 3rd resistor module, second light emitting diode
Cathode as the output pin.
8. the PLC according to claim 1-7 that can customize I/O mouthfuls, which is characterized in that the PLC is embedded
PLC。
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| CN201810783317.5A CN108897275A (en) | 2018-07-17 | 2018-07-17 | A kind of PLC can customize I/O mouthfuls |
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| CN108897275A true CN108897275A (en) | 2018-11-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111813041A (en) * | 2020-06-06 | 2020-10-23 | 杭州智尔科技有限公司 | Programmable logic controller based on computer programming language and implementation method |
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Application publication date: 20181127 |