CN103685595B - Communication system with automatic setting function for recognizing number - Google Patents
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Abstract
The invention provides a communication system with automatic setting function for recognizing numbers; when a communication line is connected with a plurality of communication units, the automatic setting function for recognizing numbers can be automatically set for communication units; the communication system (10) a short circuit connector (12), a plurality of branch units (16a-16d) connected in series with the short circuit connector (12) through the communication line (14), and communication units (18a-18d) respectively connected with the branch units (16a-16d). signal lines (26, 28, 30, 32) are respectively related to bit string ID0-ID3 used for generating a single ID set signal, and the signal lines are wired to the first branch unit (16a) through a second connector (22a). in the branch unit (16a), in the inputted bit string ID0-ID3, two preset two bit signal lines (26, 32) are connected with the communication unit (18a) through the first connector (20a).
Description
Technical field
The present invention relates to the communication system having and each of multiple communication units forming network is automatically set to the function of identification number.
Background technology
Same communication line connects in the communication system of multiple stage communication unit, sometimes require each communication unit setting other identification number (ID).In such a communications system, there is the situation connecting multiple communication unit, also have the situation of the communication unit connecting multiple stage one species.
Such as, a kind of LAN system is described in Japanese Unexamined Patent Publication 08-037538 publication, it carries out entire system management by exchange of management information between lan device, the management data wire different from network data wire is set, uses the transmission of this management data wire for distributing the signal of ID from main lan device to driven lan device.Here, be set to the special data line transfer of use management for distributing the signal of ID from main lan device to driven lan device, in driven lan device, under the unappropriated state of ID, flowing into the management data wire being connected to the next driven lan device in order to not make signal, therefore distributing ID according to the order of main lan device near to far away to driven lan device.
In communication system in the past, under most cases, user uses switch etc. manually to set ID to each communication unit, but in order to not make ID repeat, carry out whole ID settings very miscellaneous.Further, arrange such switch to the equipment implementing waterproof and dustproof, owing to needing the mechanism of the waterproof and dustproof arranged for keeping this switch sections, therefore cost raises.
In addition, in the system of RS-485 communication mode using one of serial communication specification, can apply the automatic method of salary distribution of ID, in this approach, during slave equipment request ID, this ID is also automatically distributed to this slave equipment by main equipment distribution ID.When there is the request from the ID of multiple slave equipment, main equipment can use the adjustment such as random number to send signal again, and automatically distributes other ID to each slave equipment.In addition, in Ethernet (Ethernet(registered trade mark)) in, when factory shipment, the intrinsic ID being called MAC Address is write in the ROM of communication unit, and communicate according to this intrinsic ID.But in these modes, existing cannot by the position of the communication unit connected on same communication line and the shortcoming be associated between ID.
The method recorded in Japanese Unexamined Patent Publication 08-037538 publication be to the communication unit of arranged in series from upstream successively (according to main order at one's side near to far away) decide the method for ID.In the method, the position of the communication unit be connected in series can be associated with ID, but software process for setting ID is needed, for realizing the circuit of this process for each communication unit.In addition, communication unit, in order to carry out relaying to signal of communication, when wanting the replacing carrying out communication unit under the state making system acting, needs to interrupt the communication between this upstream and downstream.
Summary of the invention
Therefore, in order to solve above-mentioned problem, the object of the present invention is to provide a kind of communication system, having when to be connected to multiple stage communication unit on same communication line, automatically can set the pre-setting function automatically of identification number (ID) to communication unit.
To achieve these goals, the invention provides a kind of communication system with the identification number pre-setting function automatically each of the multiple stage communication unit connected on same communication line automatically being set to other identification number, it is characterized in that, described communication system has short circuit connector, the multiple branch unitss be connected in series with this short circuit connector, the multiple communication units be connected with this branch units respectively, wherein, described short circuit connector, there is the Bit String output function of the initial value of the Bit String on basis when being output into other identification number individual to described communication unit setting, each described branch units, have the first connector for connecting with corresponding communication unit, for be connected with the branch units of described short circuit connector or upstream side the second connector, for be connected with the branch units in downstream the 3rd connector, a part for the Bit String inputted from described second connector is exported and the Wiring construction replaced described Bit String and export from described 3rd connector as identification number setting signal from described first connector, described communication unit, has the set-up function described identification number setting signal that the first connector of the described branch units from correspondence exports being set as the identification number of oneself.
In a preferred embodiment, the described Wiring construction in each of described multiple branch units is mutually same structure.
In a preferred embodiment, the string number of described Bit String with can be identical with the maximum number of the communication unit that described communication system is connected, described Wiring construction is while the bit of upper in certain branch units becomes the bit of the lowermost position in the branch units in next downstream, the Wiring construction of other each bits supreme upper bit of carry successively separately, or, while in certain branch units, the bit of lowermost position becomes the bit of the upper in the branch units in next downstream, other each bits are given up the throne separately successively to the Wiring construction of next the next bit.
In a preferred embodiment, described short circuit connector is master unit, and described communication unit is driven unit.
Accompanying drawing explanation
Fig. 1 is the figure of the basic structure of the communication system representing the 1st execution mode of the present invention.
Fig. 2 is the figure of the basic structure of the communication system representing the 2nd execution mode of the present invention.
Fig. 3 is the figure of the setting procedure of identification number when illustrating that communication unit number is 4.
Fig. 4 is the figure of the setting procedure of identification number when illustrating that communication unit number is 8.
Embodiment
Fig. 1 is the figure of the basic structure of the communication system 10 representing the first execution mode of the present invention.Communication system 10 is had short circuit connector 12, is represented with doublet by same communication line 14() multiple (being 4 here) branch units 16a to 16d of being connected in series with short circuit connector 12, multiple (quantity same with branch units) communication unit 18a to 18d of being connected to branch units 16a to 16d respectively.Branch units 16a to 16d has the first connector 20a to 20d respectively, and branch units 16a to 16d is connected with communication unit 18a to 18d respectively via the first connector 20a to 20d.
Be positioned at the branch units 16a in the direct downstream of short circuit connector 12, there is the second connector 22a and the 3rd connector 24a, branch units 16a is connected via the second connector 22a with short circuit connector 12, and branch units 16a is connected via the 3rd connector 24a with the branch units 16b in the direct downstream being positioned at branch units 16a.In addition, be positioned at the branch units 16b in the direct downstream of branch units 16a, there is the second connector 22b and the 3rd connector 24b, branch units 16b is connected via the second connector 22b with branch units 16a, and branch units 16b is connected via the 3rd connector 24b with the branch units 16c in the direct downstream being positioned at branch units 16b.So, each branch units has the second connector for being connected with the branch units or short circuit connector of upstream side, the 3rd connector for being connected with the branch units in downstream.In addition, the branch units (being branch units 16d here) of most downstream, also can not possess the 3rd connector 24d.
Predetermine the maximum number of connections of the communication unit in communication system, and the Bit String becoming basis when setting intrinsic identification number (hereinafter also referred to as ID) to each communication unit is equal with the maximum number of connections of communication unit.For be connected to each communication unit, the number N of holding wire that sends identification number setting signal (ID setting signal) because identification number maximally can show the Nth power of 2, the Nth power therefore setting 2 becomes more than the maximum number of connections of communication unit.Such as, in the first embodiment, the maximum number of units of communication unit is 4, and the Bit String (string) becoming source when setting intrinsic identification number to each communication unit is 4 bits, and the number being connected to the holding wire of the ID setting signal of the branch units of each communication unit is 2.
In communication unit, as the replacement method of the Bit String in the source become when setting other ID individual, such as, can enumerate: while the bit that make use of upper in certain branch units becomes the bit of lowermost position in next (next downstream) branch units, the method for other bits Wiring construction of the supreme upper bit of carry successively separately; Or while the bit that make use of lowermost position in certain branch units becomes the bit of upper in next (next downstream) branch units, other bits are given up the throne separately successively to the method for the Wiring construction of next the next bit.But, for the system of selection selecting the ID setting signal to branch units according to the Bit String on the basis become when setting other ID individual, if select the bit of the position often determined, be not then particularly limited.
For generating the Bit String of other ID setting signal, export from short circuit connector 12.Particularly, in the short circuit connector 12 shown in Fig. 1, set the Bit String ID0 to ID3 of 4 bits, be located in ID0 and ID3 and input 0V.On the other hand, ID1 and ID2 no-voltage or the external voltage that applies beyond 0V.Be associated with ID0 to ID3 respectively by holding wire 26,28,30 and 32, these holding wires are via the second connector 22a distribution to the first branch units 16a.In branch units 16a, in inputted Bit String ID0 to ID3, the holding wire 26 suitable with 2 that predetermine (here for ID1 and ID3) bits and 32(represent with thick line) be connected to communication unit 18a via the first connector 20a.
Each communication unit possesses ID set-up function, and possess when have input 0V voltage for " 0 ", when no-voltage inputting, when there is the input beyond 0V, exporting the signal conversion circuit etc. of " 1 ", and determining the identification number of each communication unit.Therefore, in the case of figure 1, identification number " 00 " is set to First communication unit 18a.
In addition, the external input signal in each communication unit can not be 0V, and applies external voltage to set, and when comprising supply voltage in the communication signal, also can use it to set.When any one, carry out distribution, the predetermined voltage corresponding to the initial value of the Bit String in the source become when setting other ID individual is inputed to the short circuit connector 12 be connected with the most upstream of branch cable.
Then, holding wire 26,28,30 and 32 is connected to the second connector 22b of second branch units 16b, but before this, carry out the replacing of holding wire, as in the example of Fig. 1, before the 3rd connector 24a to branch units 16a or in the 3rd connector 24a, carry out making aftermost holding wire 32 move to forefront, and other holding wires are retreated such replacing of the position to next signal line successively.By carrying out such replacing, being the structure same with branch units 16a in branch units 16b, simultaneously by ID0 to ID3, suitable with the bit of ID3 and ID2 holding wire 32 and 30, being connected to communication unit 18b via the first connector 20b.Therefore, in the case of figure 1, identification number " 10 " is set to second communication unit 18b.
Below, by repeating same process, identification number " 11 " is set to the 3rd communication unit 18c, and identification number " 01 " is set to the 4th communication unit 18d.Like this, each communication unit possesses mutually same structure about the Wiring construction of holding wire, and can obtain intrinsic identification number.In addition, in each branch units, by making Wiring construction be same structure, the cable between holding wire, branch units and communication unit can use the parts of one species respectively, and can realize the low of cost and subtract the facilitation with component management.In addition, when cell failure, cable break time etc., even if take off communication unit in the state of communication system work, or change, also can not the communication between other communication units be had an impact.
In addition, the communication mode between each unit has no particular limits, but preferably can carry out the RS-485 communication mode of two-way communication according to Mulit-point Connection.In addition, according to the specification of signal of communication, there is the situation needing terminal resistance, but in this case, the short circuit connector etc. possessing terminal resistance is connected to the end of the branch cable being equivalent to end points.
At this, in the first embodiment, if several First communication unit 16a is programmable controller from upstream side, second communication unit 16b is digital I/O input/output unit, 3rd communication unit 16c is robot controller, 4th communication unit 16d is display, and the action of communication system is described.
As above-mentioned, distribute ID " 00 " to programmable controller 16a, distribute ID " 10 " to the input/output unit 16b of digital I/O, distribute ID " 11 " to robot controller 16c, distribute ID " 01 " to display 16d.In addition, programmable controller 16a, robot controller 16c and display 16d carry out action as main device, and the input/output unit 16b of digital I/O carries out action as slave unit.
Main device is used in Ethernet (Ethernet(registered trade mark)) etc. in use CSMA/CD, other mediation functions, after the bus power obtaining communication lines, the Packet Generation that will consist of " identification number of sending destination, the identification number of transmission source, order, size of data, data, CRC " etc. is to other equipment.Corresponding to the communication unit of the identification number of sending destination, carry out the letter in reply of the order according to this packet.On the other hand, slave unit itself can not get bus power, only writes in reply to the packet carrying out autonomous devices.
Such as, can proceed as follows: by repeating obtaining and discharging of bus power successively, the input/output unit 16b of programmable controller 16a control figure I/O, robot controller 16c receives data from programmable controller 16a and carries out desired action, in addition, display 16d obtains the information of each communication unit, by the information displaying desired by operator in display 16d.
Fig. 2 is the figure of the basic structure of the communication system 110 representing the 2nd execution mode of the present invention.Communication system 10 difference in communication system 110 and the 1st execution mode is, as have short circuit connector function device and there is a master unit 112, the unit 118a to 118d being equivalent to communication unit 18a to 18d is driven unit.Structural element about other is identical with the 1st execution mode, therefore gives mark 100 to the structural element of the function possessed in Fig. 2 in a same manner as in the first embodiment, and eliminates detailed description.
As above-mentioned, the communication system 110 of the 2nd execution mode has a master unit 112 and multiple stage branch units 116a to 116d.Such as, master unit 112 is robot controllers, and the driven unit 118a to 118d being connected to each branch units is the input/output unit of multiple stage numeral I/O.Here, from upstream side to First numeral I/O input/output unit 118a distribute ID " 00 ", ID " 10 " is distributed to the input/output unit 118b of the second number of units word I/O, distribute ID " 11 " to the input/output unit 118c of the 3rd number of units word I/O, distribute ID " 01 " to the input/output unit 118d of the 4th number of units word I/O.
In communication system 110, robot controller 112 is by Packet Generation to First numeral I/O input/output unit 118a, and First numeral I/O input/output unit 118a writes in reply to this.Similarly, carry out the communication with the input/output unit of each digital I/O, with the sign off of the input/output unit of whole digital I/O.Robot controller 112 can carry out the operation repeated termly this.
In addition, in communication system 110, due to receive from driven unit data be only master unit, therefore do not need the information of " identification number of transmission source " in packet.Therefore, in the 2nd execution mode, without the need to setting identification number to master unit.In addition, each driven unit can be only carry out to the request signal carrying out independent unit such simple structure of writing in reply, and therefore compared with there is the situation of multiple master unit, can build communication system at a low price.
Above, describe 2 kinds of execution modes, but for the initial value becoming the Bit String in source when setting other ID individual in each execution mode, need suitable value to be set as initial value.Below, the method for the generation Bit String forming ID setting signal is described in the present invention.In brief, ID setting signal, time at every turn by communication unit, namely as shift register, value changes.
(1) initial value of ID setting signal is set to be all zero (full 0).
Such as, when maximum communication unit number is 4, meet 2
nthe minimum N of>=4 is 2, therefore, generates 2 Bit Strings " 00 " as initial value.This initial value is equivalent to the identification number of First communication unit.Similarly, when maximum communication unit number is 8,16 or 32, generate 3 Bit Strings " 000 ", " 0000 " or " 00000 " respectively as initial value.
(2) for the initial value obtained in (1), when the lowermost position bit of next stage is set to 1, if its Bit String is the Bit String also do not set as the ID setting signal of upstream, then the ID setting signal into next stage is determined.
When maximum communication unit number is 4, when will be set to " 1 " immediately following the 3rd row Bit String after " 00 ", 2 Bit Strings will then become " 01 ".They are different from " 00 " gone out, and therefore determine the 3rd row Bit String for " 1 ".Then, when will be set to " 1 " immediately following the 4th row Bit String after " 001 ", 2 Bit Strings will then become " 11 ".They are also different with " 01 " from " 00 " that goes out, therefore determine the 4th row Bit String for " 1 ".Obtained like this 2nd and the 3rd Bit String " 01 " and " 11 " become the identification number of the 2nd and the 3rd communication unit respectively.
(3) on the other hand, if this Bit String is the Bit String set as the ID setting signal of upstream, then the value of the bit of lowermost position is set to 0, and is determined the ID setting signal into next stage.
Such as, in above-mentioned (2), when will be set to " 1 " immediately following the 5th row Bit String after " 0011 ", (the 4th) 2 Bit Strings will then become " 11 ".Itself and " 11 " of the 3rd are repeated mutually, therefore determine the 5th Bit String arranged for " 0 " instead of " 1 ".Thus, the 4th Bit String becomes " 10 ", and this becomes the identification number of the 4th communication unit.
(4) by repeating the process of above-mentioned (2) to (3), the generation Bit String of the ID setting signal according to maximum communication unit number is obtained.
In addition, according to above-mentioned process, maximum communication unit number is that the generation Bit String of the ID setting signal of the situation of 4 becomes " 00110 ", but, as used illustrated by Fig. 1, the bit of upper owing to can be set to such distribution of lowermost position bit in next stage, and therefore, this generation Bit String can be set to " 0011 ".
In addition, the 1st symbol is set to " 0 " by the processing spec of above-mentioned (1) to (4), the 2nd symbol is set to the situation of " 1 ", but also two signpermutations can be carried out.Namely, can be such process: the initial value of ID setting signal in (1) is all set to 1(complete 1), by when in (2), the lowermost position bit of next stage is set to " 0 ", if this Bit String is ID setting signal as upstream and the Bit String also do not set, then determined as next stage ID setting signal, on the other hand, in (3), if this Bit String is ID setting signal as upstream and the Bit String set, then the value of lowermost position bit is set to 1, determined as next stage ID setting signal, and repeated (2) and (3).
Table 1 uses above-mentioned process to obtain the result that maximum communication unit number is the generation Bit String of the situation of 4,8,16 or 32 respectively.In addition, the subsidiary underscore portion (full 0) in Bit String that generates represents the initial value of ID setting signal.In all cases, Bit String number equals maximum communication unit number.
Table 1
In addition, table 1 also shows the situation situation of 7 (such as 6 or) that maximum communication unit number is not equivalent to the Nth power (N is natural number) of 2 in the lump.Under these circumstances, can apply above-mentioned (1) and obtain generation Bit String to (4), operator can obtain Bit String according to repetition test.
Fig. 3 and Fig. 4 illustrates that the generation Bit String shown in use table 1 decides the figure of the process of the ID of each communication unit.First, when maximum communication unit number is 4 (Fig. 3), as First communication unit ID and set the initial value " 00 " (frame line in) of 2 bits.Then, as the ID of second communication unit, be set to make the bit of the 1st row in generation Bit String " 0011 " to move to the most end of Bit String, by 2 initial bits of other the bit Bit String of a carry gained one by one, be " 01 ".Below, by repeating same process, set " 11 " and " 10 " ID as the 3rd and the 4th communication unit respectively.Without repeating in these ID.
In addition, when maximum communication unit number is 8 (Fig. 4), as the ID of First communication unit, the initial value " 000 " (in frame line) of 3 bits is set.Then, as the ID of second communication unit, be set to make the bit of the 1st row in generation Bit String " 00011101 " to move to the most end of Bit String, by 3 initial bits of other the bit Bit String of a carry gained one by one, be " 001 ".Below, by repeating same process, set " 011 ", " 111 ", " 110 ", " 101 ", " 010 " and " 100 " respectively as the 3rd ID to the 8th communication unit.Without repeating in these ID.
According to the present invention, be provided with the branch units for carrying out branch in each communication unit to signal of communication, the setting signal of ID is exported in this branch units, and then, the branch units in downstream is connected by the Wiring construction arranging the Bit String of the setting signal of substitute I D, automatically can set intrinsic identification number to each communication unit.Set identification number determines due to the order of connection according to branch units, therefore easily holds the relation between identification number and position.
In each branch units, establishing line is configured to same structure, and thus, the cable between branch units, communication unit can use the equipment of one species respectively, during cell failure, cable break time etc. replacing become easy.In addition, even if take off certain communication unit under the state of communication system work, or change, also can not the communication between other communication units be had an impact.
By short circuit connector being set to master unit, communication unit being set to driven unit, each driven unit can be only to the simple structure that the request signal carrying out independent unit is write in reply, and compared with there is the situation of multiple master unit, can build communication system at a low price.
Claims (3)
1. a communication system, has the identification number pre-setting function automatically each of the multiple communication units connected on same communication line automatically being set to other identification number, it is characterized in that,
Described communication system, the multiple branch unitss there is short circuit connector, being connected in series with this short circuit connector, the multiple communication units be connected with this branch units respectively,
Wherein, described short circuit connector has to export based on the Wiring construction of described branch units and the Bit String output function of the initial value of predetermined Bit String described multiple communication unit setting other identification number, wherein, the columns of described Bit String be with can be identical with the maximum number of the communication unit that described communication system is connected number
Each of described branch units, has: for the first connector connected with corresponding communication unit; For the second connector be connected with the branch units of described short circuit connector or upstream side; For the 3rd connector be connected with the branch units in downstream; Wiring construction, using from described second connector input, the maximum number of communication unit that can be connected with described communication system is that in the Bit String of columns, the N Bit String that arranges exports as identification number setting signal from described first connector, and replace Bit String that described maximum number is columns and export from described 3rd connector, wherein, N be satisfied 2 N power be more than or equal to the smallest natural number of described maximum number
Described Wiring construction in each of described multiple branch units is mutually same structure,
Described communication unit, has the set-up function described identification number setting signal that the first connector of the described branch units from correspondence exports being set as the identification number of oneself.
2. communication system according to claim 1, is characterized in that,
While the bit that described Wiring construction has a upper in certain branch units becomes the lowermost position bit in the branch units in next downstream, the Wiring construction of other bits supreme upper bit of carry successively separately, or, while in certain branch units, lowermost position bit becomes the upper bit in the branch units in next downstream, other bits are given up the throne separately successively to the Wiring construction of next the next bit.
3. communication system according to claim 1 and 2, is characterized in that,
Described short circuit connector is master unit, and described communication unit is driven unit.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2012-193904 | 2012-09-04 | ||
| JP2012193904A JP5576913B2 (en) | 2012-09-04 | 2012-09-04 | Communication system having automatic setting function of identification number |
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| CN103685595B true CN103685595B (en) | 2015-07-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005159791A (en) * | 2003-11-27 | 2005-06-16 | Fujikura Ltd | Connector and network system |
| CN1941787A (en) * | 2005-09-30 | 2007-04-04 | 乐金电子（昆山）电脑有限公司 | Method for setting tag in A/V network apparatus |
| CN1991811A (en) * | 2005-12-27 | 2007-07-04 | 三星电子株式会社 | Master module, function module, electronic device and identification data setting method thereof |
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| US7680961B2 (en) * | 2005-10-25 | 2010-03-16 | Hewlett-Packard Development Company, L.P. | Device recognition system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005159791A (en) * | 2003-11-27 | 2005-06-16 | Fujikura Ltd | Connector and network system |
| CN1941787A (en) * | 2005-09-30 | 2007-04-04 | 乐金电子（昆山）电脑有限公司 | Method for setting tag in A/V network apparatus |
| CN1991811A (en) * | 2005-12-27 | 2007-07-04 | 三星电子株式会社 | Master module, function module, electronic device and identification data setting method thereof |
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