CN201267027Y - DMX512 light control system with assistant configuration channel - Google Patents
DMX512 light control system with assistant configuration channel Download PDFInfo
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- CN201267027Y CN201267027Y CNU2008200585231U CN200820058523U CN201267027Y CN 201267027 Y CN201267027 Y CN 201267027Y CN U2008200585231 U CNU2008200585231 U CN U2008200585231U CN 200820058523 U CN200820058523 U CN 200820058523U CN 201267027 Y CN201267027 Y CN 201267027Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
A DMX512 light control system with an auxiliary configured channel comprises a main controller, a plurality of node control units and a plurality of lamps connected with each node control unit; the main controller and the node control units are connected by a main channel which adopts a bus network and complies with the semiduplex mechanism of the RS485 communication protocol, in addition, the main controller and the node control units are simultaneously connected by one auxiliary channel which adopts a series connection mode of hand in hand, and the system transmits information between the main controller and the node control units by an order frame and a response frame. The light control system can configure the working parameters of each subcontrol node including address in real time online and can obtain the working parameters of each subcontrol node in real time online.
Description
Technical field
The utility model more specifically, is the DMX512 system that has auxiliary collocation channel about a kind of about a kind of lamp light control system.
Background technology
The DMX512 agreement is a kind of light of stage control protocol of USITT (U.S. arenas technological associations) issue in 1986, has now become international standard agreement, applies to widely in the lamp light control system of light of stage, building building Landscape Lighting.
The connection diagram of Fig. 1 display standard DMX512 system, this schematic diagram is not considered internodal photoelectricity quarantine measures.The master controller of this standard DMX512 system and each Node Controller constitute single node and send the bus-network that multinode receives.In actual engineering, in the time of adopting bus mode communication, as shown in the figure, label 70 ' expression bus, then must each communication node 20 ', 30 ', and 40 ' (except the main controlled node 10 ') all have a unique address or ID number, system could normally accept data.Usually, adopt toggle switch for the address of Node Controller or ID number or realize by non volatile register is write data, can produce like this, just that the different Node Controller in installation site can not exchange, Node Controller hinder for some reason after the replacing must re-mapping etc. problem.This safeguards for production management, project installation and brings very big inconvenience.
In addition, the communication physical layer of the DMX512 system of standard adopts the RS485 standard, only uses the one-way transmission function usually; Send the light control data with DMX512 agreement predetermined data frame, communication baud rate 250K, the data capacity of each Frame are 512 bytes (also having the start-code of 1 byte and the BREAK of 88us in addition).From 1986 of this standard formulation till now, two more than ten years went over, the software and hardware technology of electronic applications has all had rapid progress, and system can be operated in higher traffic rate and more under the state of large-capacity data frame, so that higher levels of systematic function to be provided fully.And opposite, sometimes in order to adapt to bad working environment, the traffic rate of the low system that begs to surrender possibly reduces the Frame size, guaranteeing the stable of system works, and the specifications parameter that the DMX512 system of standard can't online adjustment agreement.
In addition, standard DMX512 system does not provide the running status of master controller diagnosis node controller, and master controller reads the function and the mechanism of each controlled light fixture operational factor, even the running status of Node Controller is undesired like this, master controller can not be discerned, and brings difficulty to system maintenance.
The utility model content
The purpose of this utility model provides a kind of DMX512 system with auxiliary collocation channel with the lighting system in control stage, the building building Landscape Lighting.Has the characteristic that meets its user demand by the DMX512 system with auxiliary collocation channel of the present utility model.System can divide the control node to comprise the running parameter of node address by real time altering.System can obtain the parameters of branch control node in real time.
According to the utility model, a kind of DMX512 system with auxiliary collocation channel, comprise a master controller, plurality of nodes control unit, and the some light fixtures that are connected with each this node control unit, described master controller is connected by a main channel with described plurality of nodes control unit, adopt bus-network, master controller also is connected by an accessory channel with described plurality of nodes control unit, and this accessory channel adopts the hand-in-hand mode that is connected in series.
In described a kind of enhancement mode DMX512 lamp light control system that increases auxiliary collocation channel, each described node control unit comprises two Node Controllers, these two Node Controllers are respectively applied for described main channel and described accessory channel, and these two Node Controllers pass through I
2C bus or universaling I/O port connect, and these two Node Controllers have a UART Universal Asynchronous Receiver Transmitter respectively; Each described node control unit also can comprise a Node Controller, and this Node Controller has two UART Universal Asynchronous Receiver Transmitter, and these two UART Universal Asynchronous Receiver Transmitter are respectively applied for described main channel and described accessory channel; Each described node control unit also can comprise a Node Controller, and this Node Controller only has a UART Universal Asynchronous Receiver Transmitter, and this UART Universal Asynchronous Receiver Transmitter is used for the main channel, and the sending and receiving end of accessory channel connects the universaling I/O port of described Node Controller; Described master controller sends a command frame by accessory channel to each Node Controller, described master controller is revised the parameter of the enhancement mode DMX512 lamp light control system of described increase auxiliary collocation channel by described command frame, for example, described command frame can selectively be configured to node address temporary address or permanent address; Described Node Controller sends an acknowledgement frame by the main channel to master controller, and described Node Controller transmits the running parameter of light fixture to master controller by described acknowledgement frame; The half-duplex mechanism of RS485 communications protocol can be adopted in described main channel, also can adopt the half-duplex mechanism of RS422 communications protocol.
The utility model the utility model increases a subsidiary communications passage that is exclusively used in system configuration by the DMX512 system that gives standard, and the accessory channel and the main channel of this increase are relatively independent, so the DMX512 system that the utility model can compatibility standard.Simultaneously because accessory channel and master control passage are 2 independently passages, thereby the Configuration Control Unit that is used for the main controller of main channel and is used for accessory channel can be an equipment, also can adhere to 2 equipment separately.When being configured system, accessory channel do not influence the work of master control passage, make main controller that the baud rate of each address of node, main channel in the system can online in real time be set, and the size of Frame, really accomplish the online, real-time, dynamic of system configuration, greatly expanded systematic function.Accessory channel is operated under fixing 9600 or 4800 the low baud rate, and its work is more stable, and communication distance is farther, has guaranteed the reliability of system configuration.
The utility model can be set to temporary address and permanent address two classes by node address.Node Controller writes non volatile register with permanent address and forever preserves, and by permanent address work, system only need dispose primary address and can work all the life like this behind the electrification reset.And in other are used, main controller can timing (as every 100ms) be provided with command frame to a minute temporary address of control node transmission, after Node Controller is received the temporary address, replace permanent address with it, this pattern is fit to the occasion of needs " hot-swappable " function.Such as in light of stage, insert temporarily or the replacing system in certain light fixture the time, can obtain proper address behind the 100ms at most in the new lamp connecting system, enter normal operating conditions, system need not interrupt normal operation and carry out address setting.
The utility model has utilized the half-duplex function of RS485, main controller can require Node Controller to send acknowledgement frame by the main channel to it, after main controller receives the acknowledgement frame of specified node, can judge whether this node is in normal operating conditions, and can obtain every running parameter of light fixture, with this foundation as system maintenance.
Description of drawings
The structural representation of the DMX512 system of Fig. 1 display standard;
Fig. 2 shows the structural representation according to the embodiment one of the enhancement mode DMX512 lamp light control system of increase auxiliary collocation channel of the present utility model;
Fig. 3 shows the structural representation according to the embodiment two of the enhancement mode DMX512 lamp light control system of increase auxiliary collocation channel of the present utility model;
Fig. 4 shows the structural representation according to the embodiment three of the enhancement mode DMX512 lamp light control system of increase auxiliary collocation channel of the present utility model;
Fig. 5 shows the structural representation of the lamp light control system the when accessory channel according to the enhancement mode DMX512 lamp light control system of increase auxiliary collocation channel of the present utility model adopts nonequilibrium Transistor-Transistor Logic level communication.
Embodiment
Describe technology contents of the present utility model in detail hereinafter with reference to appended graphic and embodiment.
Embodiment one
As shown in Figure 2, this figure demonstration is according to the basic structure of the embodiment one of the enhancement mode DMX512 lamp light control system of increase auxiliary collocation channel of the present utility model.This DMX512 lamp light control system has a main channel 70 and an accessory channel 80, each master control point 10 and node 20a, 30a, and be connected with a UART Universal Asynchronous Receiver Transmitter UART and a Node Controller MCU on the main channel 70 between the 40a, also be connected with a UART Universal Asynchronous Receiver Transmitter UART and a Node Controller MCU on the accessory channel between per two nodes.Node Controller on this main channel and the Node Controller on the accessory channel pass through I
2C bus or universaling I/O port connect.The half-duplex mechanism of RS485 communications protocol is followed in this main channel, adopts bus-network to connect master controller and plurality of nodes control unit, and channel end is provided with terminal build-out resistor 60.This accessory channel adopts hand-in-hand mode be connected in series master controller and plurality of nodes control unit.The polyphone connected mode of so-called " hand in hand ", be meant that the transmitting terminal of master controller accessory channel receives the accessory channel receiving terminal of the 1st branch control node, in like manner, the transmitting terminal of the 2nd branch control node is received the receiving terminal of the 3rd node, the transmitting terminal of n node is received the receiving terminal of n+1 node, and the like, until last node.Accessory channel adopts the internetwork connection mode that is somebody's turn to do " hand in hand ", therefore can transmit by the relay of Frame between minute control node and distinguish the locus, front and back of each node on bus, thereby can be by node to main controller, order from the near to the remote is provided with each address of node, and then revises other running parameters of each node.
During work, system is by the Frame of main channel transmission DMX512, and by default, the communication baud rate of main channel is 250K, and the Frame capacity is 512 bytes; System sends command frame by master controller to each Node Controller by accessory channel, revises the running parameter of each node according to this command frame, and accessory channel is operated in fixing traffic rate state, as baud rate 9600.Command frame is made up of 4 bytes, and form is as follows:
| Frame head | Frame category ID | Data 1 | Data 2 |
| 0xF5 | |||
| 1byte | 2byte | 3byte | 4byte |
The command frame format description is as follows:
(1) frame head: supply the beginning of the software recognition instruction frame of Node Controller, its value is fixed as 0xf5.When the form of design command frame, 0xF5 should not appear again, to guarantee the uniqueness of this value in frame on other fields.
(2) frame category ID: for the classification of Node Controller software recognition instruction frame,, still " Frame size command frame is set " such as being " the address instruction frame is set ", " main channel baud rate command frame is set ", or the like; The corresponding relation such as the following table of the value of frame category ID and " command frame " classification:
| Frame category ID value | Implication |
| 0x11 | Permanent address is set |
| 0x12 | The temporary address is set |
| 0x21 | The main channel baud rate is set |
| 0x31 | The Frame size is set |
| 0x41 | Require the specified node controller to reply |
| Its residual value except that 0xf5 | Standby |
(3) data byte 1 and data byte 2: these two bytes provide concrete command information in all kinds of command frame, be defined as follows:
A., the address instruction frame is set
When master controller carries out address setting, send " address is set " command frame at accessory channel, and establish data1=0, if data2 is the data word joint number that each node plan takies in the system, the 1st node of receiving this frame reads the data1 value on the bus, obtaining this address of node is 0, then data1 is added 1, issues following 1 node.Therefore, n node will be read data1 and obtain this address of node value n-1, add 1 back data1 and become n, send to n+1 node then.All nodes are read the value m that data2 obtains, and will be the byte numbers in the Frame that takies of this node.Such as, n address of node is set as (n-1), and it will read (n-1) * m+1 to n*m byte from the DMX512 Frame, be used to control the light fixture of this node.
If frame ID=0x11, the value of expression data1 is a permanent address, and the MCU in the Node Controller (micro-control unit) will write this address value in the non volatile register; If frame ID=0x12, the value of expression data1 is the temporary address, and the MCU in the node deposits this value in the internal memory in and uses as the temporary address.The temporary address disappeared after power down or MCU resetted, and the node sub-controller uses permanent address.
B. dispose main channel baud rate command frame
The value of data1 and the corresponding relation of baud rate see the following form:
| data1 | baud | data1 | baud |
| 0x0 | 1300 | 0x7 | 125K |
| 0x1 | 2600 | 0x8 | 250K |
| 0x2 | 5200 | 0x9 | 500K |
| 0x3 | 10.4K | 0xA | 1M |
| 0x4 | 20.8K | 0xB | 2M |
| 0x5 | 41.7K | 0xC | 4M |
| 0x6 | 83.3K | 0xD | 8M |
After each Node Controller MCU received that from accessory channel frame ID is the command frame of 0x21, former state was transmitted backward, simultaneously with main channel UART, i.e. UART Universal Asynchronous Receiver Transmitter, baud rate adjust to respective value.
C., DMX512 Frame size command frame is set
For the DMX512 system of standard, 1 Frame comprises 512 bytes.The improved DMX512 of the utility model system can dynamically change the size of DMX512 Frame.When master controller need change Frame big or small, the command frame of sending out form following from accessory channel.
By the information that this frame transmitted, the big young pathbreaker of Frame is adjusted into:
data2*256+data1
After each node M CU received this frame, former state node was rearwards transmitted, and according to the value of data2 and data1, self running software parameter was set, the Frame of the new spec of sending with correct reception master controller.
D. require the specified node controller to reply command frame
Master controller can require in the system any Node Controller to send out acknowledgement frame to master controller, Node Controller reports each parameter of this node on request in the acknowledgement frame that it sends, as temperature, brightness, or the like, master controller can perhaps offer the reference data that the engineering staff does system maintenance according to the parameter adjustment system running state of receiving.
The implication of data2 occurrence:
| The data2 value | Implication |
| 0x0 | Only require to reply, do not require to report parameter |
| 0x1 | Requirement reports the outer temperature of this section point light fixture |
| 0x2 | Requirement reports temperature in this section point light fixture |
| 0x3 | Requirement reports the brightness of this node ruddiness |
| 0x4 | Requirement reports the brightness of this node green glow |
| 0x5 | Requirement reports this section brightness of filling enamel |
| 0x6 | Requirement reports this section point light fixture exogenous damp degree |
| 0x7 | Requirement reports humidity in this section point light fixture |
| 0x8 | Requirement reports the sequence number of this section point light fixture |
| Its residual value except that 0xf5 | Standby |
When master controller send require to reply command frame after, the main channel is set to accepting state from transmit status at once, and starts " overtime timer ", waits for the acknowledgement frame that the receiving node controller sends; After Node Controller receives that command frame is replied in requirement that master controller is sent, whether " destination node address " checked in the frame conforms to this node address, if do not conform to, then former state is transmitted backward, if conform to, then a little after the time-delay (switching to accepting state fully), self main channel is converted to transmit status by accepting state to guarantee master controller, read the relevant parameter of self, make up and send acknowledgement frame.If " the overtime timer " of master controller overflows and do not receive the destination node acknowledgement frame yet, the destination node controller failure is described, master controller can be reported fault message to the Operation and Maintenance personnel in a suitable manner.
Node Controller acknowledgement frame form is as follows:
| Frame head | Node address | Parameter type | Parameter 1 | Parameter 2 | Parameter 3 |
| 0xFA | |||||
| 1byte | 2byte | 3byte | 4byte | 5byte | 6byte |
The acknowledgement frame format description
(1) frame head: supply the beginning of the software identification acknowledgement frame of master controller, its value is fixed as 0xFA.When the form of design acknowledgement frame, on other fields should 0xFA not appear again, guarantee the uniqueness of this value in frame.
(2) node address: for the source of master controller software identification acknowledgement frame, promptly this acknowledgement frame by which Node Controller is sent.
(3) parameter type: indicating the incidental parameter of this acknowledgement frame is the parameter of what type:
As shown in the table is the definition of parameter type
| " parameter type " value | Implication |
| 0x0 | Do not have and report parameter |
| 0x1 | The outer temperature of this section point light fixture |
| 0x2 | Temperature in this section point light fixture |
| 0x3 | The brightness of this node ruddiness |
| 0x4 | The brightness of this node green glow |
| 0x5 | This section brightness of filling enamel |
| 0x6 | This section point light fixture exogenous damp degree |
| 0x7 | Humidity in this section point light fixture |
| 0x8 | The product ID of this section point light fixture |
| 0x9～0x10 | Standby |
| 0x11 | This node does not have the function that the outer temperature of light fixture is provided |
| 0x12 | This node does not have the function that temperature in the light fixture is provided |
| 0x13 | This node does not have the function that ruddiness brightness is provided |
| 0x14 | This node does not have the function that green glow brightness is provided |
| 0x15 | This node does not have the function that blue light brightness is provided |
| 0x16 | This node does not have the function that the outer humidity of light fixture is provided |
| 0x17 | This node does not have the function that humidity in the light fixture is provided |
| 0x18 | This section point light fixture product-free sequence number |
| Its residual value except that 0xfA | Standby |
(4) parameter value: parameter value divides 3 bytes to transmit, and wherein parameter 1,2,3 is respectively the basic, normal, high octet of parameter, therefore, and parameter value=parameter 3 * 65536+ parameter 2 * 256+ parameter 1.
The course of work of the present utility model as detailed above, need to prove, accessory channel and main channel that the utility model increases are relatively independent, thereby DMX512 system that can compatibility standard, therefore, for the Node Controller in main channel and the accessory channel, the DMX512 controller that can connect standard on the main channel sends the light control data, and while " Configuration Control Unit " of a special use of access on accessory channel carries out address and system parameters configuration.
Embodiment two
As shown in Figure 3, according to the basic structure of the embodiment two of the enhancement mode DMX512 lamp light control system of increase auxiliary collocation channel of the present utility model substantially with embodiment one, different is, node control unit 20b, 30b among this embodiment two, and 40b in core controller adopt a Node Controller, this Node Controller is applied to main channel 70 and accessory channel 80 respectively simultaneously by two UART Universal Asynchronous Receiver Transmitter that are connected to main channel 70 and accessory channel 80.The structure of present embodiment two and operation principle are all similar to embodiment one, those skilled in the art fully can be according to this embodiment two is carried out in the description of embodiment one, therefore at this embodiment two is given unnecessary details no longer in detail, need to prove, because accessory channel 80 of the present utility model and main channel 70 are 2 independently passages, thereby " main controller " and " Configuration Control Unit " can be an equipment, also can adhere to 2 equipment separately.Therefore, the structure that present embodiment two is provided still can be undertaken online, real-time and dynamic configuration by 80 pairs of systems of accessory channel under the situation that does not influence main channel 70 work.
Embodiment three
Be illustrated in figure 4 as schematic diagram according to the basic structure of the embodiment three of the enhancement mode DMX512 lamp light control system of increase auxiliary collocation channel of the present utility model, compare with embodiment two, for further reducing cost, node control unit 20c, 30c in the present embodiment three, and 40c adopt and only to be built-in with a UART, the MCU of lower cost.During work, this unique UART is used for main channel 70, and receive on the universaling I/O port of MCU the sending and receiving end of accessory channel 80, is read by the software of MCU to receive I/O mouth state and simulate the function that realizes hardware UART to sending the set of I/O mouth.Because of realizing that with software the UART function can take certain CPU time, therefore in this replacement scheme of this embodiment, the software of MCU can adopt the preferential strategy of accessory channel 80, promptly when accessory channel 80 by high level during to low level saltus step, be the start bit of UART communication this moment, triggers the interruption of MCU, and the MCU call subroutine is realized reception and the transmission of UART, in this process, ignore the work of main channel 70.Certainly, for main controller 10, can suspend the transmission of main channel when sending the command frame of accessory channel 80, perhaps 70 gaps that send Frame send command frame in the main channel, thereby avoid the conflict of Node Controller software when handling main channel 70 and secondary channels 80 work.Therefore those skilled in the art can no longer be given unnecessary details in these other parts to embodiment three according to structure and the operation principle of the description of embodiment two being known these embodiment three remainders fully.
Other explanations
The foregoing description mainly carries out at the difference formation of Node Controller, and in those embodiment, what accessory channel adopted is the differential transfer mode of balanced signal.In fact, because the accessory channel traffic rate always is lower than the main channel, and the communication distance of main and auxiliary passage is identical, thereby for reducing cost, reduce the core number of telecommunication cable, accessory channel can adopt nonequilibrium Transistor-Transistor Logic level communication, and promptly the accessory channel in the various embodiments described above also can adopt nonequilibrium Transistor-Transistor Logic level communication.With embodiment two is example, and the system's connection diagram under this modification as shown in Figure 5.As shown in Figure 5, the differential transfer mode of balanced signal is still adopted in the main channel 70 in this programme, and accessory channel 80 then adopts nonequilibrium Transistor-Transistor Logic level communication.In addition, impedance for coupling balance transmission lead, and prevent that static or external interference from damaging the send and receive buffers of non-equilibrium transmission, each node 20b, 30b, and input, the output of the non-equilibrium passage of 40b all should be added with the capacitance-resistance matching network, do not draw among this capacitance-resistance matching network figure.
In the various embodiments described above, be to guarantee the reliability of described command frame and acknowledgement frame transmission, command frame and acknowledgement frame can increase the cyclic redundancy check (CRC) code of 1 byte, i.e. 1 CRC check byte, each node can carry out CRC check earlier after receiving frame like this.If CRC check is made mistakes, then the MCU of this node will take corresponding measure, stop forwarding command frame such as Node Controller, and the light fixture with this node control is arranged at particular state simultaneously, as flashing of Shan Hong look 1HZ, make mistakes with the communication of system for prompting installation and maintenance personnel accessory channel.
In addition, in the various embodiments described above, comprise that accessory channel adopts in the technical scheme of nonequilibrium Transistor-Transistor Logic level communication, what adopted the main channel all is communication modes of semiduplex RS485.As a rule, technique scheme can be taken into account cost and performance demands.In some cases, for further improving systematic function, reduce the systems soft ware complexity, the utility model increases the main channel of the enhancement mode DMX512 lamp light control system of auxiliary collocation channel can adopt complete semiduplex RS422 communication mode, at this moment " Frame " transmits on different physical channels respectively with " acknowledgement frame ", and the communication interface circuit of controller not be used between reiving/transmitting state and switches.
In sum; though the utility model discloses as above with preferred embodiment; but those embodiment are not in order to restriction the utility model; the those of ordinary skill in this field; in not breaking away from spirit and scope of the present utility model; all can do various changes and retouching, particularly at the concrete form of command frame and acknowledgement frame, therefore protection range of the present utility model is as the criterion with the scope that claim defines.
Claims (9)
1. DMX512 lamp light control system with auxiliary collocation channel, comprise a master controller, plurality of nodes control unit, and the some light fixtures that are connected with each this node control unit, described master controller is connected by a main channel with described plurality of nodes control unit, adopt bus-network, it is characterized in that: described master controller also is connected by an accessory channel with described plurality of nodes control unit, and this accessory channel adopts the hand-in-hand mode that is connected in series.
2. the DMX512 lamp light control system with auxiliary collocation channel according to claim 1, it is characterized in that: each described node control unit comprises two Node Controllers, these two Node Controllers are respectively applied for described main channel and described accessory channel, and these two Node Controllers pass through I
2C bus or universaling I/O port connect.
3. the DMX512 lamp light control system with auxiliary collocation channel according to claim 2 is characterized in that: described two Node Controllers have a UART Universal Asynchronous Receiver Transmitter respectively.
4. the DMX512 lamp light control system with auxiliary collocation channel according to claim 1, it is characterized in that: each described node control unit comprises a Node Controller, this Node Controller has two UART Universal Asynchronous Receiver Transmitter, and these two UART Universal Asynchronous Receiver Transmitter are respectively applied for described main channel and described accessory channel.
5. the DMX512 lamp light control system with auxiliary collocation channel according to claim 1, it is characterized in that: each described node control unit comprises a Node Controller, this Node Controller has a UART Universal Asynchronous Receiver Transmitter, this UART Universal Asynchronous Receiver Transmitter is used for the main channel, and the sending and receiving end of accessory channel connects the universaling I/O port of described Node Controller.
6. the DMX512 lamp light control system with auxiliary collocation channel according to claim 1, it is characterized in that: described master controller sends a command frame by auxiliary channel to each Node Controller, and described master controller is revised the parameter of each node control unit of enhancement mode DMX512 lamp light control system of described increase auxiliary collocation channel by described command frame.
7. the DMX512 lamp light control system with auxiliary collocation channel according to claim 1, it is characterized in that: described Node Controller sends an acknowledgement frame by the main channel to master controller, and described Node Controller transmits the running parameter of light fixture to master controller by described acknowledgement frame.
8. according to any one described DMX512 lamp light control system with auxiliary collocation channel among the claim 1-7, it is characterized in that: the half-duplex mechanism of RS485 communications protocol is followed in described main channel.
9. according to any one described DMX512 lamp light control system with auxiliary collocation channel among the claim 1-7, it is characterized in that: the half-duplex mechanism of RS422 communications protocol is followed in described main channel.
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| CN102176798A (en) * | 2010-12-28 | 2011-09-07 | 北京星光影视设备科技股份有限公司 | Digitized lamp control system |
| CN101711076B (en) * | 2009-11-18 | 2013-01-23 | 广州中大中鸣科技有限公司 | DMX512 communication link and method thereof |
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| CN101711076B (en) * | 2009-11-18 | 2013-01-23 | 广州中大中鸣科技有限公司 | DMX512 communication link and method thereof |
| CN102176798A (en) * | 2010-12-28 | 2011-09-07 | 北京星光影视设备科技股份有限公司 | Digitized lamp control system |
| CN103248526A (en) * | 2012-02-08 | 2013-08-14 | 迈普通信技术股份有限公司 | Communication equipment and method for achieving out-of-band monitoring and management, and master-slave switching method |
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| CN109769325A (en) * | 2019-03-28 | 2019-05-17 | 深圳爱克莱特科技股份有限公司 | LED colour mixture lighting system, LED colour mixture light remote control apparatus and its control method |
| CN112437061A (en) * | 2020-11-11 | 2021-03-02 | 广州彩熠灯光股份有限公司 | Out-of-band communication method, system, storage medium and device based on DMX512 protocol |
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