CN218124727U - Control device and control system - Google Patents
Control device and control system Download PDFInfo
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- CN218124727U CN218124727U CN202222028136.6U CN202222028136U CN218124727U CN 218124727 U CN218124727 U CN 218124727U CN 202222028136 U CN202222028136 U CN 202222028136U CN 218124727 U CN218124727 U CN 218124727U
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Abstract
The utility model provides a controlling means and control system relates to industrial control technical field, and this backplate includes: host system, backplate and at least one daughter card module, wherein: the backboard is provided with a plurality of slot positions, each slot position is internally provided with a connector, and the connectors are used for providing slot position numbers for the daughter card modules; each sub-card module is inserted into the slot position and connected with the connector, and the communication address of each sub-card module is the slot position number of the corresponding slot position; the master control module comprises an RS485 unit, the RS485 unit is connected with the connector and used for bidirectional conversion of an RS485 protocol and a serial port protocol, and the master control module is used for controlling and managing each daughter card module through a communication address. The utility model discloses a with the communication address of daughter card module and backplate trench be correlated with, realize the one-to-many communication of host system and many daughter card modules, improve the scalability of communication flexibility ratio and host system.
Description
Technical Field
The utility model relates to an industrial control technical field especially relates to a controlling means and control system.
Background
With the development of electronic communication technology, industrial control type chassis generally integrates more types of electronic equipment, and in order to achieve the purposes of flexible configuration and matching according to needs, a backplane card-inserting scheme is adopted to effectively connect a main control module with various service daughter card modules. The main control module and each sub-card module communicate through a specific communication bus, and flexible sub-card module collocation, hot plug and the like can be realized by selecting a proper communication bus according to actual service requirements.
At present, when a master control module communicates with a sub-card module, the sub-card module binds a fixed communication address, if each sub-card module binds a different communication address, the master control module cannot establish communication because the communication address cannot be obtained in advance, and the risk that different communication addresses cannot be provided for a plurality of sub-cards due to too small address pool capacity exists; if the same type of sub-card module is bound with the same communication address, when the sub-card module with the access of more than 2pcs is accessed, the communication can not be carried out due to the conflict of the device addresses on the bus.
SUMMERY OF THE UTILITY MODEL
The utility model provides a controlling means and control system for solve the defect that fixed communication address need be bound to the sub-card module among the prior art, through the communication address that will block the card module and backplate trench are correlated with, realize the one-to-many communication of host system and backplate subassembly, improve communication flexibility ratio and host system's scalability.
The utility model provides a control device, include: host system, backplate and at least one daughter card module, wherein:
the back plate is provided with a plurality of slot positions, and each slot position is internally provided with a connector which is used for providing a slot position number for the daughter card module;
each sub-card module is inserted into the slot position and connected with the connector, and the communication address of each sub-card module is the slot position number of the corresponding slot position;
the master control module comprises an RS485 unit, the RS485 unit is connected with the connector and used for bidirectional conversion of an RS485 protocol and a serial port protocol, and the master control module is used for controlling and managing the sub-card modules through the communication addresses.
According to the utility model provides a control device, the connector includes the address signal end, the connector passes through the address signal end is connected correspondingly the communication interface of daughter card module, just the level signal of address signal end output is used for the sign the connector place trench the trench number.
According to the utility model provides a control device, the daughter card module includes first state signal end, the connector still includes second state signal end, the daughter card module passes through first state signal end is connected the connector second state signal end.
According to the utility model provides a control device, first state signal end includes: the first in-place state signal end, the first interrupt signal end and the first reset signal end, the second state signal end includes: the first in-place state signal end is connected with the second in-place state signal end, the first interrupt signal end is connected with the second interrupt signal end, and the first reset signal end is connected with the second reset signal end.
According to the utility model provides a control device, host system still includes little the control unit, little the control unit connection the RS485 unit for receive the data after the protocol conversion and to RS485 unit send control command.
According to the utility model provides a control device, little the control unit still is connected with the IO bus, and passes through the IO bus connection the first state signal end of daughter card module.
According to the utility model provides a control device, the RS485 unit includes input/output end and protocol conversion chip, wherein, input/output end connects respectively protocol conversion chip with the data communication end of connector, protocol conversion chip connects little the control unit.
According to the utility model provides a control device, the RS485 unit connection has the RS485 bus, input/output end passes through the RS485 bus connection the data communication end of connector.
According to the utility model provides a control device, the RS485 unit still includes protection chip, protection chip connects respectively input/output end with protocol conversion chip is used for absorbing the daughter card module peg graft in the instantaneous high voltage that produces during the connector.
The utility model also provides a control system, include: the control device comprises an external device and the control device, wherein the external device is connected with the daughter card module.
The utility model provides a controlling means and control system, the communication address of daughter card module is correlated with the trench of backplate, through inserting each daughter card module in the trench of locating the backplate, nimble trench number with each daughter card module place trench sets up the communication address of this daughter card module, make host system establish the communication connection relation through this communication address and the daughter card module that corresponds, realize the control and the management to each daughter card module, increase substantially the communication flexibility ratio, avoid causing the problem of host system and each daughter card module unable communication because of communication address is fixed, still can realize the dilatation through the quantity of backplate or increase backplate, and expandability is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a control device provided by the present invention;
fig. 2 is a schematic diagram of a connection between a backplane and a daughter card module provided by the present invention;
fig. 3 is an exemplary connection diagram of a backplane and daughter card module provided by the present invention;
fig. 4 is a schematic connection diagram of the connector provided by the present invention;
fig. 5 is a schematic circuit connection diagram of the RS485 unit provided by the present invention;
fig. 6 is a schematic communication flow diagram of the control device provided by the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings in the present invention will be combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
With the development of electronic communication technology, industrial control type chassis generally integrates more types of electronic equipment, and in order to achieve the purposes of flexible configuration and matching according to needs, a backplane card-inserting scheme is adopted to effectively connect a main control module with various service daughter card modules. The main control module and each sub-card module communicate through a specific communication bus, and flexible sub-card module collocation, hot plug and the like can be realized by selecting a proper communication bus according to actual service requirements.
At present, when a master control module communicates with a sub-card module, the sub-card module binds a fixed communication address, if each sub-card module binds a different communication address, the master control module cannot establish communication because the communication address cannot be obtained in advance, and the risk that different communication addresses cannot be provided for a plurality of sub-cards due to too small address pool capacity exists; if the same type of sub-card module is bound with the same communication address, when the sub-card module with the access of more than 2pcs is accessed, the communication can not be carried out due to the conflict of the device addresses on the bus.
In addition, in the prior art, the daughter card module and the main control module may further adopt a UART (Universal Asynchronous Receiver/Transmitter) bus, an SPI (Serial Peripheral Interface) bus, and an isolated RS485 bus for communication, where:
the UART bus can only carry out one-to-one communication, can not realize one-to-many communication, and the main control module can only communicate with the 1pcs daughter card module. On the basis of adopting a UART bus, the Switch is adopted to carry out link switching, one-to-many communication can be realized, the software development difficulty and cost can be improved, and the daughter card modules are inconvenient to distinguish when being randomly mixed and inserted, so that the flexibility and the expandability are poor.
The SPI bus allows access to multiple slave devices, but requires the master control module to have a corresponding number of CS (chip select) pins, and even if a common IO extension is available, the occupation of IO resources will increase accordingly. And the SPI bus is single-ended high-speed signal, and it is great to stride the influence of many integrated circuit boards route to the signal, and communication quality is difficult to guarantee.
The isolation RS485 bus is that an RS485 bus is independently distributed for each daughter card module, so that the daughter card modules can be inserted in a mixed mode, the requirement on the RS485 resource of the master control module is increased, the RS485 resource is limited for a conventional microcontroller MCU, the requirement cannot be met, meanwhile, the expandability of the daughter card modules is poor, and the cost is increased if the microcontroller MCU with a plurality of RS485 resources is adopted.
In view of the above problem, the present invention provides a control device, fig. 1 is the present invention provides a structural schematic diagram of a control device, fig. 2 is the present invention provides a connection schematic diagram of a backplane and a daughter card module, as shown in fig. 1-2, this control device 100 includes: a master module 110, a backplane 120, and at least one daughter card module 130, wherein:
a plurality of slot positions 121 are arranged on the back plate 120, a connector 122 is arranged in each slot position 121, and the connector 122 is used for providing slot position 121 numbers for the daughter card modules 130;
each sub-card module 130 is inserted into the slot 121 and connected to the connector 122, and a communication address of each sub-card module 130 is a number of the slot 121 corresponding to the slot 121;
the main control module 110 includes an RS485 unit 111, the RS485 unit 111 is connected to the connector 122 for performing bidirectional conversion between an RS485 protocol and a serial port protocol, and the main control module 110 is configured to control and manage each of the daughter card modules 130 through the communication address.
Specifically, because fixed communication address needs to be bound in advance to sub-card module 130 among the prior art, and host system 110 can not acquire the communication address of sub-card module 130 in advance for can't establish communication connection relation between sub-card module 130 and host system 110, consequently, the utility model provides a controlling means 100, be equipped with a plurality of trench 121 on the backplate 120, and number trench 121, sub-card module 130 can be mixed and inserted in trench 121, and be connected with connector 122 in trench 121, communication address need not be predetermine to sub-card module 130, and regard as this sub-card module 130's communication address with trench 121 number in sub-card module 130's trench 121, avoid appearing the problem that communication address is repeated or inconvenient to detect sub-card module 130 place trench 121 between sub-card module 130. In addition, after the daughter card module 130 is inserted into the slot 121 of the backplane 120, the slot 121 of the slot 121 is used as a communication address of the daughter card module 130, the main control module 110 may actively obtain an in-place state signal in the slot 121 through the connector 122, and under the condition that the in-place state signal is a low level, the main control module 110 obtains the slot 121 as the communication address of the daughter card module 130 that needs to communicate, and establishes a communication connection relationship with the daughter card module 130, so as to perform data interaction with the daughter card module 130.
Optionally, the connector 122 includes an address signal end, the connector 122 is connected to the communication interface corresponding to the daughter card module 130 through the address signal end, and a level signal output by the address signal end is used to characterize the slot 121 number of the slot 121 where the connector 122 is located.
Specifically, the connector 122 includes an address signal end, the address signal end may be a plurality of address lines, and a level signal of each address line is preset to be a high level or a low level according to the slot 121 number, the level signals of the plurality of address lines are spliced to be used for representing the slot 121 number of the corresponding slot 121, and when the daughter card module 130 is inserted into the slot 121, the communication interface of the daughter card module 130 is connected to the address signal end of the connector 122, so that the communication address of the daughter card module 130 is a level signal output by the address signal end of the corresponding connector 122.
For example, fig. 3 is a schematic diagram illustrating an example connection between the backplane 120 and the daughter card module 130, as shown in fig. 3, taking the number of the slot 121 on the backplane 120 as 8 as an example, in the case of converting the decimal slot 121 from 0 to 7 to the binary slot 121, the number of the address lines at the address signal end in the connector 122 may be 3, and the slot 121 with 8 slots 121 in total from 0 to 7 may be represented by the level signals 000, 001, 010, 011, 100, 101, 110, and 111, respectively, where 0 represents that the address line is grounded and is at a low level, and 1 represents that the address line is at a high level.
Optionally, the daughter card module 130 includes a first status signal terminal, the connector 122 further includes a second status signal terminal, and the daughter card module 130 is connected to the second status signal terminal of the connector 122 through the first status signal terminal.
Specifically, the daughter card module 130 is further connected to the second status signal terminal of the connector 122 through the first status signal terminal, and is configured to receive a status control signal to the daughter card module 130 through the second status signal terminal of the connector 122, and is convenient to detect whether the daughter card module 130 is plugged into each slot 121.
Optionally, the first status signal terminal includes: the first on-position state signal end, the first interrupt signal end and the first reset signal end, the second state signal end includes: the first on-site state signal end is connected with the second on-site state signal end, the first interrupt signal end is connected with the second interrupt signal end, and the first reset signal end is connected with the second reset signal end.
Specifically, after the daughter card module 130 is inserted into the slot 121, three state control signals of a first state signal end of the daughter card module 130 are connected to three state control signals of a second state signal end of the connector 122 in a one-to-one correspondence manner, that is, a first in-place state signal end is connected to a second in-place state signal end, a first interrupt signal end is connected to a second interrupt signal end, and a first reset signal end is connected to a second reset signal end, so as to obtain in-place state information of the daughter card module 130, and perform interrupt alarm and reset control.
Optionally, the second on-state signal terminal of the connector 122 outputs the on-state signal PRN, the second interrupt signal terminal outputs the interrupt control signal INT, the second reset signal terminal outputs the reset control signal RST, and in the initial state, the on-state signal PRN, the interrupt control signal INT, and the reset control signal RST are all high and low are active.
Optionally, after the main control module 110 establishes a communication connection relationship with the daughter card module 130, the main control module 110 may obtain the type information of the daughter card module 130, and configure or manage the daughter card module 130.
Optionally, the main control module 110 further includes a micro control unit, and the micro control unit is connected to the RS485 unit 111, and is configured to receive data after protocol conversion and send a control instruction to the RS485 unit 111.
Specifically, when the micro control unit processes the received data or needs to send a control instruction, the RS485 protocol needs to be converted into the serial port protocol by the RS485 unit 111 before processing the received data, or the serial port protocol needs to be converted into the RS485 protocol by the RS485 unit 111 after sending the control instruction.
Alternatively, the serial port protocol may be an RS232 protocol.
Optionally, the mcu is further connected to an I/O bus, and is connected to the first status signal terminal of the daughter card module 130 through the I/O bus.
Specifically, before the main control module 110 and the daughter card module 130 propose a communication connection relationship, an in-place state signal indicating whether the daughter card module 130 is inserted into the slot 121 may be obtained through the I/O bus, and the number of the slot 121 is obtained as a communication address of the daughter card module 130, so as to establish the communication connection relationship between the main control module 110 and the daughter card module 130. In addition, the micro control unit may further detect whether the daughter card module 130 sends an interrupt control signal through the I/O bus, and in case of sending the interrupt control signal, the micro control unit may send a reset control signal through the I/O bus, thereby performing a reset operation on the daughter card module 130.
Optionally, the RS485 unit 111 includes an input/output terminal and a protocol conversion chip 1111, wherein the input/output terminal is connected to the protocol conversion chip 1111 and the data communication terminal of the connector 122, respectively, and the protocol conversion chip 1111 is connected to the micro control unit.
Specifically, the input and output ends of the RS485 unit 111 are connected to the data communication end of the connector 122, and the protocol conversion chip 1111 may perform protocol conversion on data sent from the data communication end of the connector 122 to the input and output ends or a control command sent from the microcontroller.
Optionally, the RS485 unit 111 is connected to an RS485 bus, and the input and output ends are connected to the data communication end of the connector 122 through the RS485 bus.
Specifically, the input and output ends of the RS485 unit 111 are connected to the multiple daughter card modules 130 through an RS485 bus, so that the main control module 110 and the multiple daughter card modules 130 realize multi-point data communication.
Optionally, the RS485 unit 111 further includes a protection chip 1112, and the protection chip 1112 is connected to the input/output terminal and the protocol conversion chip 1111, respectively, and configured to absorb an instantaneous high voltage generated when the daughter card module 130 is plugged into the connector 122.
Exemplarily, fig. 4 is a schematic connection diagram of the connector 122 provided by the present invention, as shown in fig. 4, the connector 122 is provided with 18 pins, wherein, the M1 pin and the M2 pin both represent pins of a mechanical hole for fixing the connector 122 in the slot 121; the A1 pin and the A2 pin are used for being connected with a power supply, the A3 pin, the A4 pin and the A5 pin are three address lines of an address signal end, the A5 pin is in a high position, the A4 pin is next to the A4 pin, the A3 pin is in a lowest position, and the A3 pin, the A4 pin and the A5 pin can be combined to form 8 slot positions 121, namely 8 communication addresses are generated; the pin A6 and the pin A16 are suspended to represent high level, and the pin A7 to the pin A10 are grounded; pin a11 is a second interrupt signal terminal of the connector 122 and is connected to a first interrupt signal terminal of the daughter card module 130, pin a12 and pin a13 are used to connect to the input/output terminal of the RS485 unit 111, pin a14 is a second in-place state signal terminal of the connector 122 and is connected to a first in-place state signal terminal of the daughter card module 130, and pin a15 is a second reset signal terminal of the connector 122 and is connected to a first reset signal terminal of the daughter card module 130.
Exemplarily, fig. 5 is a circuit connection diagram of RS485 unit 111, as shown in fig. 5, the RD pin and the DI pin of protocol conversion chip 1111 are connected to the micro control unit, the DE pin of protocol conversion chip 1111 inputs the enable signal, and the DE pin is connected with the RE pin and then is grounded after two resistors are connected in series, the VCC pin is connected to the power supply, the GND pin is grounded, the B pin and the a pin are connected to the input/output end of RS485 unit 111, and the B pin and the a pin are connected to a protection chip 1112 respectively, and the transient high voltage generated when the sub-card module 130 is plugged into the connector 122 is absorbed.
Optionally, fig. 6 is a schematic diagram of a communication flow of the control device 100 according to the present invention, as shown in fig. 6, the main control module 110 and the daughter card module 130 may implement communication through the following steps:
(1) The main control module 110 actively acquires an in-place state signal output by the second state of the connector 122 at the bit end, and if the in-place state signal is a high level, it indicates that the sub-card module 130 in the corresponding slot 121 is not inserted, and the main control module 110 does not communicate with the sub-card module 130; if the level is low, it indicates that the daughter card module 130 is inserted into the corresponding slot 121, and pulls down the bit status signal in the slot 121.
(2) When the daughter card module 130 is in the bit position, the main control module 110 obtains the slot 121 number corresponding to the slot 121, and uses the slot 121 number as a communication address of the daughter card module 130, and proposes a communication connection relationship with the daughter card module 130.
(3) The main control module 110 reads the configuration information of the daughter card module 130 through the communication address, and the configuration information includes but is not limited to: type information and operating status.
(4) The main control module 110 judges whether the corresponding sub-card module 130 works normally through the configuration information, and does not process when the sub-card module 130 works normally, and the main control module 110 polls the data of the sub-card module 130 and continues to monitor the working state of the sub-card module 130; and (5) when the daughter card module 130 works abnormally, executing the step.
(5) Judging whether the daughter card module 130 is in place or not through the in-place state signal, judging whether the work of the daughter card module 130 is abnormal due to the fact that the daughter card module 130 is pulled out or not, if the in-place state signal is high level, indicating that the daughter card module 130 is pulled out, adjusting the in-place state signal of the corresponding slot position 121 to be high level, and interrupting the communication connection relation between the main control module 110 and the daughter card module 130; if the bit status signal is low, step (6) is performed.
(6) Judging whether the interrupt signal of the daughter card module 130 is at a low level, if so, sending an alarm message to the main control module 110 by the daughter card module 130, and processing the alarm message by the main control module 110; if the level is high, it indicates that the daughter card module 130 fails, the daughter card module 130 pulls down the reset signal, i.e., the level is adjusted from high to low, and resets the daughter card module 130, and returns to execute step (4).
The utility model provides a controlling means 100, the communication address of daughter card module 130 is correlated with trench 121 of backplate 120, through inserting each daughter card module 130 in the trench 121 of locating backplate 120, the nimble trench 121 number with each daughter card module 130 place trench 121 sets up to the communication address of this daughter card module 130, make host system 110 establish the communication connection relation through this communication address and the daughter card module 130 that corresponds, realize control and the management to each daughter card module 130, increase substantially the communication flexibility ratio, avoid causing the fixed problem that causes host system 110 and each daughter card module 130 unable communication because of the communication address, still can realize the dilatation through backplate 120 or the quantity that increases backplate 120, improve scalability.
The utility model also provides a control system, include: an external device is connected to the daughter card module 130, and the control apparatus 100 is described above.
Optionally, the daughter card module 130 may be a power supply board, the external device may be a plurality of types of electrical appliances, such as a lamp and a camera, and the main control module 110 configures the daughter card module 130, so that the daughter card module 130 outputs voltages required by the electrical appliances; the sub-card module 130 may also be a switch, the external device may also be a network device such as a camera, the sub-card module 130 may upload data collected by the camera to the main control module 110 for processing, and the external device may also be a multi-type sensor, and may control the sensor to collect data through the main control module 110.
The utility model provides a control system can realize controlling means 100 and external device's a to many control, reduces control cost and control complexity.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A control device, comprising: host system, backplate and at least one daughter card module, wherein:
the back plate is provided with a plurality of slot positions, and each slot position is internally provided with a connector which is used for providing a slot position number for the daughter card module;
each sub-card module is inserted into the slot position and connected with the connector, and the communication address of each sub-card module is the slot position number of the corresponding slot position;
the main control module comprises an RS485 unit, the RS485 unit is connected with the connector and used for bidirectional conversion of an RS485 protocol and a serial port protocol, and the main control module is used for controlling and managing the sub-card modules through the communication addresses.
2. The control device according to claim 1, wherein the connector includes an address signal terminal, the connector is connected to a communication interface corresponding to the daughter card module through the address signal terminal, and a level signal output by the address signal terminal is used to represent the slot number of a slot where the connector is located.
3. The control device of claim 1 or 2, wherein the daughter card module comprises a first status signal terminal, the connector further comprises a second status signal terminal, and the daughter card module is connected to the second status signal terminal of the connector through the first status signal terminal.
4. The control device of claim 3, wherein the first status signal terminal comprises: the first in-place state signal end, the first interrupt signal end and the first reset signal end, the second state signal end includes: the first on-site state signal end is connected with the second on-site state signal end, the first interrupt signal end is connected with the second interrupt signal end, and the first reset signal end is connected with the second reset signal end.
5. The control device of claim 4, wherein the main control module further comprises a micro control unit, and the micro control unit is connected with the RS485 unit and is configured to receive the data after the protocol conversion and send a control instruction to the RS485 unit.
6. The control device according to claim 5, wherein the micro control unit is further connected with an I/O bus, and is connected with the first status signal terminal of the daughter card module through the I/O bus.
7. The control device of claim 5, wherein the RS485 unit comprises an input/output end and a protocol conversion chip, wherein the input/output end is respectively connected with the protocol conversion chip and the data communication end of the connector, and the protocol conversion chip is connected with the micro control unit.
8. The control device of claim 7, wherein an RS485 bus is connected to the RS485 unit, and the input and output ends are connected with the data communication end of the connector through the RS485 bus.
9. The control device of claim 7, wherein the RS485 unit further comprises a protection chip, and the protection chip is respectively connected to the input/output terminal and the protocol conversion chip, and is configured to absorb an instantaneous high voltage generated when the daughter card module is plugged into the connector.
10. A control system, comprising: an external device and a control apparatus as claimed in any one of claims 1 to 9, the external device being connected to the daughter card module.
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| CN202222028136.6U CN218124727U (en) | 2022-07-29 | 2022-07-29 | Control device and control system |
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| CN202222028136.6U CN218124727U (en) | 2022-07-29 | 2022-07-29 | Control device and control system |
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