CN211653480U - Communication protocol conversion device, protection circuit, control system and intelligent dry separator - Google Patents
Communication protocol conversion device, protection circuit, control system and intelligent dry separator Download PDFInfo
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- CN211653480U CN211653480U CN202020554774.XU CN202020554774U CN211653480U CN 211653480 U CN211653480 U CN 211653480U CN 202020554774 U CN202020554774 U CN 202020554774U CN 211653480 U CN211653480 U CN 211653480U
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Abstract
The utility model discloses a communication protocol conversion device, protection circuit, control system and intelligence dry separation machine. The device includes: the device comprises a port physical layer (PHY) chip, a processor, a first interface and a second interface group; the PHY chip is respectively connected with the first interface and the processor, and the processor is connected with each second interface in the second interface group; the PHY chip is used for transmitting the signal of the general protocol received by the first interface to the processor or transmitting the signal of the general protocol provided by the processor to the first interface; and the processor is used for converting the signal of the general protocol acquired from the PHY chip into a signal of a target protocol and then transmitting the signal to a target interface in the second interface group, or converting the signal of the target protocol received from the target interface into a signal of the general protocol and then transmitting the signal to the PHY chip. The device can quickly and stably realize the conversion of the communication protocol and has strong compatibility.
Description
Technical Field
The embodiment of the utility model provides a relate to PLC control system technical field, especially relate to a communication protocol conversion device, protection circuit, control system and intelligence dry separation machine.
Background
The core part of a control system of a smart Dry Separator (TDS) is a Programmable Logic Controller (PLC) control system. In the TDS, a PLC control system is divided into a PLC master station and a plurality of slave stations. Generally, the PLC master station uses a Siemens 1511-1 control module to communicate data with each substation through an Ethernet-based Industrial Fieldbus protocol Standard (Modbus TCP) communication protocol. In the TDS Control system, the slave stations are characterized by a large number and various types, and communication interfaces of some slave stations support a Modbus TCP communication Protocol, but most slave stations are communication protocols customized by equipment manufacturers based on a Transmission Control Protocol (TCP) and a User Datagram Protocol (UDP).
Based on the above situation, if the TDS control system uses the slave station that does not support the Modbus TCP communication protocol, the protocol conversion is needed when the PLC master station communicates with the slave station. In the protocol conversion method adopted in the prior art, a communication protocol of a PLC master station and a communication protocol of a slave station are converted into an process Control interface standard (OLE for process Control, OPC) protocol by software self-developed by a user on an upper computer, and then communication between the PLC master station and the slave station is realized.
However, The upper computer must adopt a WINDOWS operating system of an X86 architecture (The X86 architecture) due to functional limitations, and software on The operating system has unstable operation, which may cause control and data communication of critical devices to be abnormal, and in severe cases, may cause a TDS control system to fail and stop, even cause personal safety accidents. In addition, in the protocol conversion method in the prior art, the slave station has a large delay in responding to the request initiated by the PLC master station, so that the TDS control system has a risk.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a communication protocol conversion device, protection circuit, control system and intelligence dry separation machine can realize communication protocol's conversion, compatibility are strong fast, steadily.
In a first aspect, an embodiment of the present invention provides a communication protocol conversion device, which includes: the device comprises a port physical layer (PHY) chip, a processor, a first interface and a second interface group;
the PHY chip is respectively connected with the first interface and the processor, and the processor is connected with each second interface in the second interface group;
the PHY chip is used for transmitting the signal of the general protocol received by the first interface to the processor, or transmitting the signal of the general protocol provided by the processor to the first interface;
the processor is configured to convert a signal of a general protocol acquired from the PHY chip into a signal of a target protocol, and transmit the signal to a target interface in the second interface group, or convert a signal of the target protocol received from the target interface into a signal of the general protocol, and transmit the signal to the PHY chip.
Optionally, the device further includes: a watchdog circuit and a clock reset circuit;
the input end of the watchdog circuit is connected with the processor, the output end of the watchdog circuit is connected with the input end of the clock reset circuit, and the output end of the clock reset circuit is connected with the processor;
the watchdog circuit is used for detecting the working state of the processor and sending a reset signal to the clock reset circuit when the processor is determined to be in an abnormal working state;
the clock reset circuit is used for receiving the reset signal sent by the watchdog circuit and resetting the processor according to the reset signal.
Optionally, the device further includes: an on-board sensor;
the on-board sensor is connected with the processor and used for detecting the working environment state of the device.
Optionally, the second interface group includes: at least one of an isolation 485 interface, an isolation 232 interface, a digital input interface, an analog input interface, a digital output interface, an analog output interface, an integrated circuit bus interface, and a serial peripheral interface.
Optionally, the device further includes: isolating the chip;
each second interface is connected with the processor through the corresponding isolation chip;
and the isolation chip is used for isolating the corresponding second interface from the processor when the received signal is determined to be abnormal. Optionally, the processor includes: an ARM processor; the general protocol is a MODBUS TCP protocol.
In a second aspect, the embodiment of the present invention further provides a protection circuit for a communication protocol conversion device, where the protection circuit includes: the utility model discloses arbitrary embodiment said communication protocol conversion device, protection circuit and power;
the input end of the protection circuit is connected with the power supply, and the output end of the protection circuit is connected with the processor of the communication protocol conversion device;
the protection circuit includes: an overvoltage protection circuit, an undervoltage protection circuit and a reverse protection circuit;
the overvoltage protection circuit is used for disconnecting the power supply of the communication protocol conversion device connected with the power supply when the voltage exceeds a first preset value;
the under-voltage protection circuit is used for disconnecting the power supply of the communication protocol conversion device and the power supply when the voltage is lower than a second preset value;
and the reverse protection circuit is used for disconnecting the power supply of the connection between the communication protocol conversion device and the power supply when the voltage polarity is reversely connected.
In a third aspect, the embodiment of the present invention further provides a PLC control system, where the PLC control system includes: the communication device comprises a master station, at least one first-class slave station which does not support a general protocol, and at least one communication protocol conversion device as any embodiment of the invention, or a communication protocol conversion device protection circuit as any embodiment of the invention;
and a first interface of each embedded communication protocol conversion device is connected with the master station, and a second interface in the second interface group is connected with a first class slave station.
Optionally, the PLC control system further includes: at least one secondary station of a second type supporting a common protocol;
and each slave station of the second type is respectively connected with the master station.
In a fourth aspect, the embodiment of the utility model provides a still provide an intelligence dry separation machine, this intelligence dry separation machine includes: the PLC control system as any embodiment of the utility model;
the master station is connected with an electric control system in the intelligent dry separator, and the first type slave station or the second type slave station is connected with at least one of the following items in the intelligent dry separator: the device comprises a feeding system, a distributing device, a recognition device, an execution mechanism, an air supply system and a dust removal system.
The utility model discloses a found a communication protocol conversion device who is used for realizing protocol conversion between general protocol signal and other protocol signals, solved among the prior art TDS control system unstability and the high problem that causes the uncertain risk of system height of communication protocol conversion delay in the system, realized fast, stably that communication protocol's conversion, compatibility are strong, can make TDS control system steady operation, reduce the effect of the uncertain risk degree of system.
Drawings
Fig. 1 is a schematic structural diagram of a communication protocol conversion device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a communication protocol conversion device according to an embodiment of the present invention;
fig. 3 is a schematic circuit connection diagram of an isolation chip in a communication protocol conversion device according to an embodiment of the present invention;
fig. 4 is a schematic connection diagram of a protection circuit of a communication protocol conversion device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an ARM processor of a communication protocol conversion device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a communication protocol conversion device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a PLC control system according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram of a PLC control system according to a second embodiment of the present invention;
fig. 9 is a schematic structural diagram of an intelligent dry separator provided by the third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of a communication protocol conversion device according to an embodiment of the present invention, which is applicable to a situation of communication protocol conversion between a master station and a slave station of a PLC in a TDS control system, and the device can be implemented by software and/or hardware.
As shown in fig. 1, the device comprises: a port Physical layer (PHY) chip 110, a processor 120, a first interface 130, and a second interface group 140. The PHY chip 110 is connected to the first interface 130 and the processor 120, and the processor 120 is connected to each second interface in the second interface group 140.
The PHY chip 110 may be used for connecting to a PLC master station in a PLC control system, and is used for communication over ethernet. The processor 120 may be a CPU processor or an ARM processor, and the embodiment of the present invention preferably employs the ARM processor, which may be an embedded hardware platform. The first interface 130 is used for connecting the PLC master station and the ARM processor, the PLC master station and the ARM processor communicate through the first interface 130 and the PHY chip 110 by using an ethernet bus, and when the PLC master station adopts a siemens 1511-1 control module, it may follow a MODBUS TCP communication protocol; when the master station adopts control modules of other types, the master station can also adopt other corresponding general communication protocols to carry out data communication with the ARM processor, and the invention is not particularly limited. The second interface group 140 may include a plurality of second interfaces, each of which may be a different type of interface, for communicating the slave station with the ARM processor in the PLC control system, the slave station and the ARM processor communicate through the second interface, and different hardware buses may be used, which may be compliant with a custom communication protocol of the slave station.
Fig. 2 is a schematic structural diagram of a communication protocol conversion device according to an embodiment of the present invention, as shown in fig. 2, in an implementation manner of an embodiment of the present invention, optionally, the second interface group 140 includes: at least one of an isolated 485 Interface, an isolated 232 Interface, a Digital Input (DI) Interface, an Analog Input (AI) Interface, a Digital Output (DO) Interface, an Analog Output (AO) Interface, an Integrated Circuit bus (IIC) Interface, and a Serial Peripheral Interface (SPI) Interface.
The isolation 485 interface and the isolation 232 interface can be RS type interfaces, namely can be an RS-485 interface and an RS-232 interface respectively, and can be communication interfaces used for a single chip microcomputer. The utility model provides a communication protocol conversion device can have a plurality of second interfaces, can be the communication interface that slave station used among the PLC control system, the utility model discloses a communication protocol conversion device has the second interface of a plurality of different grade types, has very strong compatibility.
As shown in fig. 1, the PHY chip 110 is configured to transmit a signal of a general protocol received through the first interface 130 to the processor 120, or transmit a signal of a general protocol provided by the processor 120 to the first interface 130.
In an implementation manner of the embodiment of the present invention, optionally, the processor includes: an ARM processor; the general protocol is MODBUS TCP protocol.
The PHY chip 110 may transmit the signal, which is received by the first interface 130 and conforms to the MODBUS TCP protocol based on the ethernet bus, to the ARM processor, or may transmit the signal, which is provided by the ARM processor and conforms to the MODBUS TCP protocol based on the ethernet bus, to the first interface. For example, the PLC central station may be connected to the first interface, and may implement smooth communication with the ARM processor through the first interface and the PHY chip. The first interface may be a communication interface suitable for the PHY chip and the PLC central station, and may be a communication interface based on an ethernet bus and conforming to a MODBUS TCP protocol.
As shown in fig. 1, the processor 120 is configured to convert the signal of the general protocol acquired from the PHY chip 110 into a signal of a target protocol, and then transmit the signal to a target interface in the second interface group 140, or convert a signal of the target protocol received from the target interface into a signal of the general protocol, and then transmit the signal to the PHY chip 110.
The processor 120 may be an ARM processor, and the ARM processor may convert a signal of a general protocol acquired from the PHY chip 110, such as a signal based on an ethernet bus and complying with a MODBUS TCP protocol, into a signal of a target protocol, such as a hardware bus based on a target interface and a signal complying with a communication protocol customized based on TCP and UDP; and transmits the converted signal to the target interface in the second interface group 140, wherein the specific transmission to which second interface is may be determined by the ARM processor according to the connection condition of the second interface. For example, when the isolated 232 interface in the second interface group is connected to the slave PLC station, the converted signal may be transmitted to the isolated 232 interface in the second interface group, so that the slave PLC station acquires the converted signal.
In the embodiment of the present invention, the ARM processor can also receive the signal of the target protocol from the target interface, such as the signal based on the isolated 232 interface, follow the signal based on the communication protocol defined by TCP and UDP, convert the signal into the general protocol, such as the signal based on the ethernet bus, follow the MODBUS TCP protocol, and transmit the converted signal to the PHY chip 110.
The embodiment of the utility model provides a hardware system is single, embedded scheme is ripe stable, can realize that communication protocol's quick conversion can be that the conversion of general agreement to target agreement also can be that target agreement to general agreement's conversion to realize connecting the PLC main website of first interface and being connected quick, smooth and easy communication between the PLC slave station of second interface.
In an implementation manner of the embodiment of the present invention, optionally, the device further includes: isolating the chip; each second interface is connected with the processor through a corresponding isolation chip; and the isolation chip is used for isolating the corresponding second interface from the processor when the received signal is determined to be abnormal.
The isolation chip can be an optical coupler chip, and can isolate the corresponding second interface from the ARM processor when the received signal is abnormal, so that the normal work of the master station cannot be influenced by the abnormity of the slave station. For example, when a certain slave station is burnt, the master station can also normally control other slave stations which are not burnt, and the control of the master station is not influenced.
Fig. 3 is a circuit connection diagram of isolating chip in communication protocol conversion device that embodiment one provided in the present invention, as shown in fig. 3, isolation 485 interface in the second interface group can be connected with 485A _2 and 485B _2 ends in fig. 3, the ARM processor can be connected with TH10S-B _485_ TX and TH10S-B _485_ RX ends, the isolation of ARM processor and isolation 485 interface can be realized, when the slave station connected with isolation 485 interface burns out, the connection of ARM processor and isolation 485 interface is disconnected, the use of other second interfaces cannot be influenced, and the master station cannot be influenced.
As shown in fig. 2, in an implementation manner of the embodiment of the present invention, optionally, the device further includes: a watchdog circuit 210 and a clock reset circuit 220; wherein, the input end of the watchdog circuit 210 is connected with the processor 120, the output end of the watchdog circuit 210 is connected with the input end of the clock reset circuit 220, and the output end of the clock reset circuit 220 is connected with the processor 120; a watchdog circuit 210 for detecting an operating state of the processor 120, and sending a reset signal to the clock reset circuit 220 when it is determined that the processor 120 is in an abnormal operating state; the clock reset circuit 220 is configured to receive the reset signal sent by the watchdog circuit 210 and reset the processor 120 according to the reset signal.
The watchdog circuit 210 may be a timer circuit, and may periodically check the operating state of the ARM processor, and when the ARM processor is abnormal, such as when the program is flown (the program is disturbed by an external electromagnetic field, and is disordered and falls into a dead cycle), the watchdog circuit 210 may output a reset signal when the watchdog circuit 210 does not receive an input signal at a preset time. The clock reset circuit 220 may reset the ARM processor to start the program execution from the start position of the memory when acquiring the reset signal of the watchdog circuit 210. When the PLC master station or the PLC slave station is abnormal, the PLC master station or the PLC slave station can be automatically reset in the shortest time, and adverse effects on a PLC control system cannot be caused.
Fig. 4 is a schematic connection diagram of a communication protocol conversion device protection circuit that embodiment one provides, as shown in fig. 4, the utility model discloses the implementation still provides a communication protocol conversion device protection circuit, include: the utility model discloses communication protocol conversion device, protection circuit and power of arbitrary embodiment; the input end of the protection circuit is connected with the power supply, and the output end of the protection circuit is connected with the processor of the communication protocol conversion device; the protection circuit includes: an overvoltage protection circuit, an undervoltage protection circuit and a reverse protection circuit; the overvoltage protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage exceeds a first preset value; the under-voltage protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage is lower than a second preset value; and the reverse protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage polarity is reversely connected.
The communication protocol conversion device and the power supply can be connected through the protection circuit, and when the voltage exceeds a first preset value, the connection between the communication protocol conversion device and the power supply can be disconnected through the overvoltage protection circuit, so that the PLC master station stops controlling the PLC slave stations, the stability of the PLC control system can be realized, and dangers can be prevented from occurring during overvoltage. When the voltage is lower than the second preset value, the communication protocol conversion device is disconnected from the power supply through the under-voltage protection circuit, so that the PLC master station stops controlling the PLC slave stations, the stability of a PLC control system can be realized, and danger is prevented from occurring during under-voltage. Can break off being connected of communication protocol conversion device and power through reverse protection circuit when voltage polarity joins conversely to make the PLC main website stop the control to PLC slave station, can realize PLC control system's stability, take place danger when in order to prevent voltage polarity joins conversely.
As shown in fig. 4, the power source may be connected to the VIN terminal, the U3 chip may determine the overvoltage, the undervoltage and the reverse voltage connection of the power source, when the U3 determines that the overvoltage, the undervoltage and the reverse voltage connection of the power source do not exist, the U1 chip may send a power switch connection signal through the port 8, the communication protocol conversion device may be connected to the VIN24V terminal, the power source may be connected to safely operate, and meanwhile, the U4 chip may control the indicator light to turn on green, which indicates the safety of the power source circuit. When the U3 judges that the power has overvoltage, undervoltage or reverse voltage connection, a power switch disconnection signal can be sent to the U1 chip through the port 8, when the communication protocol conversion device is connected with the VIN24V end, the power cannot be switched on to work, meanwhile, the U4 chip can control the indicator light to be bright red, the fact that a power circuit is unsafe is shown, the communication protocol conversion device does not work, and therefore workers can find power problems in time and maintain the power in time.
As shown in fig. 2, in an implementation manner of the embodiment of the present invention, optionally, the device further includes: an on-board sensor 310; an on-board sensor 310 is coupled to the processor 120 for sensing the operating environment condition of the device.
Wherein, in the embodiment of the utility model provides an on-board sensor 310 can be through the state of temperature sensor, humidity transducer etc. detection communication protocol conversion device's operational environment, can be the detection to temperature, humidity. The vibration state of the communication protocol conversion device can be detected through the vibration sensor, so that the working environment of the PLC control system can be obtained, and a manager of the PLC control system can determine whether the current PLC control system is suitable for working according to the detection result of the on-board sensor 310, so that a decision whether the PLC control system is stopped or continues to work can be made.
Fig. 5 is a schematic structural diagram of an ARM processor of a communication protocol conversion device according to an embodiment of the present invention, and a conversion function of a communication protocol in the communication protocol conversion device can be realized through the connection shown in fig. 5. Fig. 6 is a schematic structural diagram of a communication protocol conversion device according to an embodiment of the present invention, as shown in fig. 6, the communication protocol conversion device is implemented by an integrated circuit, and has a small size, and an actual measurement size is approximately 130 mm × 80 mm, which is convenient for installation.
According to the technical scheme of the embodiment, the communication protocol conversion device for realizing the protocol conversion between the universal protocol signal and other protocol signals is constructed, and the communication protocol conversion device can be used for the communication protocol conversion between the master station and the slave station in the PLC control system in the TDS control system, so that the problems that the TDS control system is unstable and the communication protocol conversion delay in the system is high to cause the uncertain risk of the system to be high in the prior art are solved, the communication protocol conversion is quickly and stably realized, the compatibility is strong, the TDS control system can stably operate, and the uncertain risk of the system is reduced.
Example two
Fig. 7 is a schematic structural diagram of a PLC control system according to an embodiment of the present invention. In connection with fig. 7, the system comprises: the communication protocol conversion device comprises a main station, at least one first-class slave station which does not support a general protocol, and at least one communication protocol conversion device as any embodiment of the utility model; the first interface of each communication protocol conversion device is connected with the master station, and one second interface in the second interface group is connected with one first-class slave station.
The master station can be a PLC master station based on an Ethernet bus and following an MODBUS TCP protocol, and the slave station can be a PLC slave station based on a hardware bus of a target interface and following a communication protocol defined by TCP and UDP. The protocols followed by the various secondary stations may be the same or different. The PLC master station and the PLC slave station can realize the rapid conversion of communication protocols between the PLC master station and the PLC slave station, and the smooth communication between the PLC master station and the PLC slave station is realized, so that the stable operation of a PLC control system is ensured. In practical application, the communication time delay of prior art main website and slave station reaches more than 10 seconds, and passes through the utility model discloses a communication protocol conversion device, the communication time delay of main website and slave station shortens to within 500 milliseconds.
Among them, in an implementation manner of the embodiment of the present invention, the communication protocol conversion device includes: the device comprises a port physical layer (PHY) chip, a processor, a first interface and a second interface group; the PHY chip is respectively connected with the first interface and the processor, and the processor is connected with each second interface in the second interface group; the PHY chip is used for transmitting the signal of the general protocol received by the first interface to the processor or transmitting the signal of the general protocol provided by the processor to the first interface; and the processor is used for converting the signal of the general protocol acquired from the PHY chip into a signal of a target protocol and then transmitting the signal to a target interface in the second interface group, or converting the signal of the target protocol received from the target interface into a signal of the general protocol and then transmitting the signal to the PHY chip.
In an implementation manner of the embodiment of the present invention, optionally, the communication protocol conversion device further includes: a watchdog circuit and a clock reset circuit; the input end of the watchdog circuit is connected with the processor, the output end of the watchdog circuit is connected with the input end of the clock reset circuit, and the output end of the clock reset circuit is connected with the processor; the watchdog circuit is used for detecting the working state of the processor and sending a reset signal to the clock reset circuit when determining that the processor is in an abnormal working state; and the clock reset circuit is used for receiving the reset signal sent by the watchdog circuit and resetting the processor according to the reset signal.
In an implementation manner of the embodiment of the present invention, optionally, the communication protocol conversion device includes: a load sensor; the on-board sensor is connected with the processor and used for detecting the working environment state of the device.
In an implementation manner of the embodiment of the present invention, optionally, the second interface group includes: at least one of an isolation 485 interface, an isolation 232 interface, a digital input interface, an analog input interface, a digital output interface, an analog output interface, an integrated circuit bus interface, and a serial peripheral interface.
In an implementation manner of the embodiment of the present invention, optionally, the device further includes: isolating the chip; each second interface is connected with the processor through a corresponding isolation chip; and the isolation chip is used for isolating the corresponding second interface from the processor when the received signal is determined to be abnormal.
In an implementation manner of the embodiment of the present invention, optionally, a protection circuit for a communication protocol conversion device is further provided, including: the utility model discloses communication protocol conversion device, protection circuit and power of arbitrary embodiment; the input end of the protection circuit is connected with the power supply, and the output end of the protection circuit is connected with the processor of the communication protocol conversion device; the protection circuit includes: an overvoltage protection circuit, an undervoltage protection circuit and a reverse protection circuit; the overvoltage protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage exceeds a first preset value; the under-voltage protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage is lower than a second preset value; and the reverse protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage polarity is reversely connected.
In an implementation manner of the embodiment of the present invention, optionally, the processor includes: an ARM processor; the general protocol is MODBUS TCP protocol.
Fig. 8 is a schematic structural diagram of a PLC control system according to a second embodiment of the present invention, as shown in fig. 8, in an implementation manner of the second embodiment of the present invention, optionally, the system further includes: at least one secondary station of a second type supporting a common protocol; each slave station of the second type is connected with the master station respectively.
Wherein, the embodiment of the utility model provides a PLC control system can follow the PLC slave station of MODBUS TCP agreement including the slave station that supports general agreement, if based on the ethernet bus, PLC slave station and PLC main website follow the same communication protocol this moment, can directly link to each other and communicate, and need not to carry out protocol conversion through communication protocol conversion device.
The technical solution of the embodiment of the present invention is that, by constructing a PLC control system, wherein the PLC control system includes a master station, at least one first-type slave station that does not support a common protocol, and at least one communication protocol conversion device as described in any embodiment of the present invention; the master station and the first type of slave station realize protocol conversion between the general protocol signal and other protocol signals through the communication protocol conversion device, the problem of protocol conversion between the master station and the slave station in the PLC control system is solved, and the effects of quickly and stably realizing communication protocol conversion in the PLC control system, supporting conversion of various protocols and supporting communication of various slave stations can be achieved.
EXAMPLE III
Fig. 9 is a schematic structural diagram of an intelligent dry separator provided by the third embodiment of the present invention, as shown in fig. 9, the intelligent dry separator includes: if the utility model discloses arbitrary embodiment PLC control system, the electrical system in the intelligent dry separation machine is connected to the main website, following at least one of first kind slave station or second kind slave station connection intelligent dry separation machine: the device comprises a feeding system, a distributing device, a recognition device, an execution mechanism, an air supply system and a dust removal system.
Wherein, the control system's of TDS core control part is PLC control system, can control each control system in the TDS through PLC control system to the realization is to the overall control of TDS. The utility model provides a PLC master station can connect the electrical system of TDS, plays the effect of carrying out overall control to whole TDS, and feeding system, distributing device, recognition device, actuating mechanism, air feed system and dust pelletizing system etc. in the TDS can be connected to the PLC slave station, can realize the accurate control operation to each system in the TDS through the communication of PLC master station and slave station.
The technical scheme of the embodiment of the utility model, through constructing intelligent dry separation machine, wherein intelligent dry separation machine includes if the utility model discloses arbitrary embodiment PLC control system, the protocol conversion between master station and the first class slave station pass through communication protocol conversion device realization general protocol signal and other protocol signals among the PLC control system, solved the problem that master station and slave station communication time delay are high among the intelligent dry separation machine, can realize the quick accurate control to each system in the intelligent dry separation machine, and the stable effect of system operation.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A communication protocol conversion device, comprising: the device comprises a port physical layer (PHY) chip, a processor, a first interface and a second interface group;
the PHY chip is respectively connected with the first interface and the processor, and the processor is connected with each second interface in the second interface group;
the PHY chip is used for transmitting the signal of the general protocol received by the first interface to the processor, or transmitting the signal of the general protocol provided by the processor to the first interface;
the processor is configured to convert a signal of a general protocol acquired from the PHY chip into a signal of a target protocol, and transmit the signal to a target interface in the second interface group, or convert a signal of the target protocol received from the target interface into a signal of the general protocol, and transmit the signal to the PHY chip.
2. The device of claim 1, further comprising: a watchdog circuit and a clock reset circuit;
the input end of the watchdog circuit is connected with the processor, the output end of the watchdog circuit is connected with the input end of the clock reset circuit, and the output end of the clock reset circuit is connected with the processor;
the watchdog circuit is used for detecting the working state of the processor and sending a reset signal to the clock reset circuit when the processor is determined to be in an abnormal working state;
the clock reset circuit is used for receiving the reset signal sent by the watchdog circuit and resetting the processor according to the reset signal.
3. The device of claim 1, further comprising: an on-board sensor;
the on-board sensor is connected with the processor and used for detecting the working environment state of the device.
4. The device of any of claims 1-3, wherein the second interface group comprises: at least one of an isolation 485 interface, an isolation 232 interface, a digital input interface, an analog input interface, a digital output interface, an analog output interface, an integrated circuit bus interface, and a serial peripheral interface.
5. The device of claim 4, further comprising: isolating the chip;
each second interface is connected with the processor through the corresponding isolation chip;
and the isolation chip is used for isolating the corresponding second interface from the processor when the received signal is determined to be abnormal.
6. The device of claim 1, wherein the processor comprises: an ARM processor; the general protocol is a MODBUS TCP protocol.
7. A communication protocol conversion device protection circuit, comprising: the communication protocol conversion device of any of claims 1-6, a protection circuit, and a power supply;
the input end of the protection circuit is connected with the power supply, and the output end of the protection circuit is connected with the processor of the communication protocol conversion device;
the protection circuit includes: an overvoltage protection circuit, an undervoltage protection circuit and a reverse protection circuit;
the overvoltage protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage exceeds a first preset value;
the under-voltage protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage is lower than a second preset value;
and the reverse protection circuit is used for disconnecting the communication protocol conversion device from the power supply when the voltage polarity is reversely connected.
8. A Programmable Logic Controller (PLC) control system, comprising: a primary station, at least one first type of secondary station not supporting a common protocol, and at least one communication protocol conversion device according to any one of claims 1 to 6, or a communication protocol conversion device protection circuit according to claim 7;
the first interface of each communication protocol conversion device is connected with the master station, and one second interface in the second interface group is connected with one first-class slave station.
9. The PLC control system according to claim 8, further comprising: at least one secondary station of a second type supporting a common protocol;
and each slave station of the second type is respectively connected with the master station.
10. An intelligent dry separator comprising the PLC control system of claim 9, wherein:
the master station is connected with an electric control system in the intelligent dry separator, and the first type slave station or the second type slave station is connected with at least one of the following items in the intelligent dry separator: the device comprises a feeding system, a distributing device, a recognition device, an execution mechanism, an air supply system and a dust removal system.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112615769A (en) * | 2020-12-11 | 2021-04-06 | 杭州和利时自动化有限公司 | Exception handling method, device and communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112615769A (en) * | 2020-12-11 | 2021-04-06 | 杭州和利时自动化有限公司 | Exception handling method, device and communication system |
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