JPH01102669A - Device number setting system - Google Patents

Abstract

PURPOSE:To reduce manhour as well as artificial errors by constituting a system such as the device numbers given to each device to be controlled are automatically set when a controller is connected to each device to be controlled via the bus cables at the places of installation of each device. CONSTITUTION:A 1st signal line 300 and a 2nd signal line 400 are provided to a bus cable which secures the cascade between a controller 100 and each device 200 to be controlled for transmission of the device numbers to be given to each device 200 and the control signal which designates the time of transmission of the device numbers over the line 300 respectively. Therefore the device numbers of each device 200 is automatically set when the connection is secured between the controller 100 and each device 200 at the place of installation of a system. Thus it is possible to greatly reduce the setting manhour of device numbers and also to delete the danger for occurrence of artificial errors.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a system consisting of a control device and a plurality of controlled devices, and in particular, to improving a device number setting method for setting a device number to each controlled device, which saves a lot of man-hours. With the aim of realizing a device number setting method that does not require a lot of time and does not cause human error, a device is attached to each controlled device on the bus cable that connects the control device and each controlled device in a v1'vt manner. A first signal line for transmitting a number and a second signal line for transmitting a control signal specifying the transmission timing of the device number on the first signal line are provided, and the control signal is given to each controlled device by the control device. A device number sending means that digitally encodes the device number, time-division multiplexes it, and sends it to the first signal line, and a control that specifies the sending timing of the device number given to the first stage controlled device adjacent to the control device. A control signal sending means for sending a signal to a second signal line is provided, and the control signal is transmitted to each controlled device from an adjacent control device or a preceding controlled device via the first signal line. The number is held in synchronization with the control signal transmitted from the control device or the preceding controlled device via the second signal line, and the assigned number transmitted from the control device or the preceding controlled device is delayed. A device number holding means that transfers the control signal to a subsequent controlled device without causing any interference, and a control signal transmitted from the control device or the preceding controlled device, which is equal to the period in which one device number is transmitted on the first signal line. The configuration is such that a delay means for applying a delay and transmitting the data to a subsequent controlled device is installed.

[Industrial application field]

The present invention relates to a system including a control device and a plurality of controlled devices, and particularly relates to an improvement in a device number setting method for setting a device number to each controlled device.

In a system where a control device and multiple controlled devices are cascade-connected via a bus cable, each controlled device is A device number that identifies the control device is given to the commands, etc. that are delivered via the bus cable.
A widely used method is to add the device number assigned to the controlled device at the delivery destination.

The device number assigned to each controlled device is determined at the system installation location when the connection between the control device and each controlled device is determined, so it is necessary to set the device number for each controlled device at the installation location. Therefore, it is impossible to apply it in advance in the factory.

[Conventional technology]

FIG. 4 is a diagram showing an example of a conventional device number setting method.

In FIG. 4, one central control unit (CC) 1 constituting an electronic exchange and four networks (NW) 2 controlled by the central control unit 1 (in order to distinguish between each network, 2 -0 to 2-3 (hereinafter the same)
are connected in series by a bus cable 3.

Each network 2 has device number setting terminals T0° to T.
1□ and the device number register 21, the device number MNC= (b,,b,.)=(00) to (1
1) is provided for setting.

Device number setting terminals T0゜ to T'oz are device number MNC
The device number setting terminals T'to to T'+z are used to set the 0th digit b7° of the device number MNC.
Used to set digit b0.

Now, if device numbers MMC-(σ0) to (11) are assigned to networks 2-0 to 2-3, respectively, then the 0th digit kla (1 is logical "0") of the device number MNC is -0 and 2-2, the device number setting terminal T02 and To.
Network 2 where the Oth digit b7° of NC is logic “1”
-1 and 2-3, the device number setting terminal T'o
In networks 2-0 and 2-1, in which z and Tel are connected and the first digit bfil of the device number MNC is logic "0", the device number setting terminals T1□ and T. is connected, and the first digit b□ of device number MNC is logic “1”
In networks 2-2 and 2-3, device number setting terminals T, □ and T are connected.

As a result, the device number registers 21-O to 21-3 of each network 2-0 to 2-3 contain device numbers MNC= (b, tbna)= (o o) to (11
) is set.

In this state, the central controller 1 connects the required network (
For example, if the device number MNC = (01) of the delivery destination network 2-1 is added to the command C to be transmitted to 2-1) and sent to the bus cable 3, the command C will be sent to each network via the bus cable 3. 2 is stored in the command register (CR) 22 in the internal memory.

Each network 2 that has received the command C
The device number MNC = (01) added to the device number and the own device number MNC set in each device number register 21
= (00) to (11) are compared.

As a result of the comparison, the network 2-1 whose device numbers MNC match matches the received command C to its own network 2-1.
However, other networks 2-0.2-2 and 2-3, for which the device numbers MNC do not match, recognize that the received command C is addressed to their own network 2-0. It is determined that the address is not addressed to 0.2-2 or 2-3, and the operation for command C is not executed.

[Problem that the invention seeks to solve]

As is clear from the above explanation, in the conventional device number setting method, in order to set the device number MNC for each network 2, the device number setting terminals T0° to T,
It is necessary to connect □ in accordance with the device number MNC, which not only takes a lot of man-hours, but also poses problems such as the risk of human error and problems such as duplicate settings.

Note that a method of operating a switch instead of connecting the device number setting terminals T0° to T1□ has also been put into practice, but the same problem occurs.

An object of the present invention is to realize a device number setting method that does not require a lot of man-hours and does not cause human errors.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 100 is a control device, and 200 is a controlled device controlled by the control device 100, which constitutes a system to which the present invention is applied.

300 and 400 are the control device 100 according to the present invention.
These are a first signal line and a second signal line provided in a bus cable that cascade connects the control target device 200 and each controlled device 200.

500 is a device number sending means provided in the control device 100 according to the present invention.

600 is a control signal sending means provided in the control device 100 according to the present invention.

700 is a device number holding means provided in each controlled device 200 according to the present invention.

800 is a delay means provided in each controlled device 200 according to the present invention.

Note that for each controlled device 200, a controlled device 200 adjacent to the side closer to the control device 100 is referred to as a front-stage controlled device 200, and a controlled device 200 adjacent to a side farther from the control device 100 is referred to as a rear-stage controlled device 200. Furthermore, the controlled device 200 directly connected to the control device 100 is referred to as the foremost controlled device 200.

[Effect]

The first signal line 300 is provided to transmit a device number assigned to each controlled device 200, and the second signal line 4
00 is provided for transmitting a control signal specifying the transmission timing of the device number on the first signal line 300.

The device number sending means 500 digitally encodes the device number given to each controlled device 200, time-division multiplexes it, and sends it to the first signal line 300.

The control signal sending means 600 sends out to the second signal line 400 a control signal that specifies the sending timing of the device number given to the foremost controlled device 200 adjacent to the control device 100.

The device number holding means 700 stores the device number transmitted from the control device 100 or the upstream controlled device 200 via the first signal line 300 to the second device number from the control device 100 or the upstream controlled device 200. It is held in synchronization with the control signal transmitted via the signal wA400, and there is no delay in the device number consisting of the control device 100 or the controlled device 200 in the previous stage (the controlled device 200 in the subsequent stage
Transfer to.

The delay means 800 includes a control signal transmitted from the controlled device 200 in the previous stage, in which one device number is connected to the first signal line 300.
A delay equal to the period during which the data is transmitted above is given, and the data is transferred to the controlled device 200 at the subsequent stage.

Therefore, when the control device and each controlled device are connected using a bus cable at the system installation location, the device number assigned to each controlled device will be automatically set, and the man-hours for setting the device number will be reduced. This is significantly reduced and also eliminates the risk of human error.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a device number setting method according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating various signal waveforms in FIG. 2. Note that the same reference numerals refer to the same objects throughout the plan. Further, one system to be considered is an electronic exchange as in FIG. 4, the control device 100 is a central control device (CC) 1, and the controlled devices 200 are a network (NW) 2 of four units. Also, the device number MNC assigned to each network 2-0 to 2-3 is (b
lt)+s. )=(00) to (11).

In FIG. 2, the first signal line 300 in FIG.
And the second signal! 400, a device number line 4 and a control signal line 5 are provided, respectively. Note that in FIG. 2, the bus cable 3 (FIG. 4) that cascades the central control device 1 and each network 2 is omitted.

The device number line 4 connects the output terminal of the gate 13 in the central control device 1 and the input terminal A0 of the network 2-0 at the front stage, and also connects the output terminal B0 of the network 2 at the front stage and the network 2 at the rear stage. However, in each network 2, input terminal A0 and output terminal B0 are directly short-circuited, so device number MA
4 is the output terminal of the gate 13 in the central control device 1,
It will be connected to the input terminal A0 of each network 2.

On the other hand, the control signal line 5 connects the output terminal of the gate 14 in the central control device 1 and the input terminal A of the network 2-0 at the front stage.
The output terminal B of the network 2 at the front stage is connected to the input terminal A+ of the network 2 at the rear stage.

In the central control device 1, a binary two-finger counter (CNT) 11 and a multiplexer (M
PX) 12 is provided, and each network 2 includes a delay element (DL) 23 and a flip-flop (FF) as device number holding means 7.00 in FIG.
Further, a delay element (DL) 25 is provided as the delay means 800 in FIG.

In FIGS. 2 and 3, when each network 2 is not connected to the central controller 1, the enable signal e (logic "1") is not input to the gates 13 and 14, and the counter 11 is not connected to the enable signal e (logic "1"). Clock signal elk is not input.

When each network 2 is connected to the central control device 1 in a state where the power is exerted, network 2-0 is the first stage, and thereafter networks 2-1 to 2-3 are connected in the order of bus cables (not shown). Control device 1 controls gates 13 and 1
After inputting an enable signal e (=logic "1") to the counter 4 to make it conductive, and initializing the counter 11, a clock signal clk having a period of 2τ is input.

The counter 11 starts incrementing in response to the clock signal clk, and in each period (2τ), the counter 11
The 0-digit bit b0 and the 1-digit bit bl corresponding to the device number MNC of -3 are outputted and transmitted to the multiplexer 12.

The multiplexer 12 receives O transmitted from the counter 11.
time-division multiplexing of digit bit b0 and 1 digit bit b,
The device number line 4 is sent to the device number line 4 through the gate 13 which is in a conductive state.

As a result of the above, the device number sequence is the device number MNC of network 2-0 in the first period (time to to 1+)
(00), and the device number MNC of network 2-1 in the second period (time tl to t3) is (01),
In the third period (time to to ts), network 2
−2 device number MNC=(10) in the fourth period (time to to t).

), device number MNC of network 2-3 = (1
1) is shown.

Further, the counter 11 counts the first half of the second period (from time tl to t
Gate 1 outputs control signal c0 to
4 to the control signal line 5.

The device number string b1 sent out on the device number line 4 is transmitted to the delay element 2 in each network 2 via the device number line 4.
The bit string is inputted to the input terminal of No. 3, and after being given a delay of 1/4 period (τ/2), the bit string is output from the output terminal Q0 of each delay element 23. It is output as a bit string. After being further delayed by 1/2 period (τ) from each output terminal Q2, the bit string bI1. and are transmitted to the input terminals D1 and Do of the flip-flop 24, respectively.

Therefore, the bit strings bvht and blIo are respectively from time too to 1. “, t2° to t3°, t4
1 to t, f and t6f to t, f respectively indicate the Oth digit b7° and the first digit b1 of the device number MNC.

On the other hand, the control signal C0 sent from the central controller 1 onto the control signal line 5 is transmitted via the control signal line 5 to the clock terminal CK of the flip-flop 24 in the network 2-0 at the front stage and to the delay element 25. It is transmitted to the input terminal.

The flip-flop 24 in the network 2-0 holds the bit strings b1 and bl, 1° input to the input terminals D0 and D+ at the rising edge t0 of the control signal C0 input to the clock terminal GK, and holds the bit strings b1 and bl, 1° input to the output terminal Q0.
and Q, respectively, output logic "O" as the Oth digit b7° and the first digit b0 of the device number MNC.

As a result of the above, the device number MMC=(b,,b,.)=(00) assigned to the network 2-0 is set in the flip-flop 24.

On the other hand, the delay element 25 in the network 2-θ responds to the control signal C0 input to the input terminal during a period during which each device number MMC is transmitted according to the device number string b1, that is, one cycle (2τ
), the signal is output as a control signal C1 from the output terminal Q, and sent to the control signal line 5 from the output terminal B1 of the network 2-0.

The control signal C3 sent onto the control signal line 5 is sent to the input terminal A of the subsequent network 2-1 via the control signal line 5.
transmitted to I.

In the network 2-1, the control signal C3 input from the input terminal AI is transmitted to the clock terminal CK of the flip-flop 24 and the input terminal of the delay element 25.

The flip-flop 24 in the network 2-1 inputs the bit strings b111 and blll to the input terminals D0 and 2 at the rising edge time t of the control signal C3 input to the clock terminal CK. and output terminal Q
0 and Qt to the 0th digit of the device number MNC, respectively.
. and logic “1” and logic “O” as the first digit b1.
” is output.

As a result, the device number MNC" (bnrba.)-(01) assigned to the network 2-1 is set in the flip-flop 24.

On the other hand, the delay element 25 in the network 2-1 delays the control signal C input to the input terminal 1 by one period (2τ), and then outputs it from the output terminal Q as the control signal C2. -1 output terminal B, to control signal line 5
Send to.

Similarly, the device number MNC=(b-+b-a.)=(10) assigned to the network 2-2 is set in the flip-flop 24 in synchronization with the control signal C2, and - Device number M assigned to 3
NC=(bfi,b,.'')=(11) is set in the flip-flop 24 in synchronization with the control signal C5 output from the delay element 25 in the network 2-2.

As a result of the above, each network 2 has a device number M'
When N C is set, the central controller 1 stops inputting the enable signal e to the gates 13 and 14, and also stops inputting the clock signal clk to the counter 11.

As is clear from the above explanation, according to this embodiment, when each network 2 is connected to the central control device 1, the device number 0 MNC of each network 2 automatically It will be set.

Note that FIGS. 2 and 3 are only one embodiment of the present invention, and for example, the number of connections in the network 2 and the configuration of the device number MNC are not limited to those shown in the figures, and other examples may be used. Many modifications may be considered, but the effects of the present invention remain the same in any case. It goes without saying that the system to which the present invention is applied is not limited to the central control unit 1 and network 2 of the electronic exchange shown in the figure.

〔Effect of the invention〕

As described above, according to the present invention, in the system, when the control device and each controlled device are connected via a bus cable at the installation location, the device number assigned to each controlled device is automatically set. The man-hours required for setting device numbers are significantly reduced, and the risk of human error is also eliminated.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing a device number setting method according to an embodiment of the present invention, FIG. 3 is a diagram illustrating various signal waveforms in FIG. 2, and FIG. 1 is a diagram showing an example of a conventional device number setting method. In the figure, 1 is the central control unit (CC), 2 is the network (NW), 3 is the bus cable, 4 is the device number line,
5 is a control signal line, 11 is a counter (CNT), 12 is a multiplexer (MPX), 13 and 14 are gates,
21 is the device number register, 22 is the command register (C
R), 23 and 25 are delay elements (DL), 24 is a flip-flop (FF), 100 is a control device, 200 is a controlled device, 300 is a first signal line, 400 is a second signal line, 500 is a 600 is a control signal sending means, 700 is a device number holding means, 8 rods K (1
2. Each village's trust and welfare plan 3 Diagram

Claims (1)

[Scope of Claims] A system comprising a control device (100) and a plurality of controlled devices (200) controlled by the control device (100), wherein the control device (100) and each of the controlled devices Control device (200
), a first signal line (300) that transmits a device number assigned to each controlled device (200) to a bus cable cascade-connecting the devices; A second signal line (4
00), the control device (100) digitally encodes the device number given to each controlled device (200), time-division multiplexes it, and sends it to the first signal line (300). a device number sending unit (500); and a device number sending unit (500) that sends the control signal specifying the sending timing of the device number to be given to the controlled device (200) at the foremost stage adjacent to the control device (100) to the second device. Signal line (400)
a control signal transmitting means (600) for transmitting a control signal to each controlled device (200); ) to the control device (100).
Alternatively, it is held in synchronization with the control signal transmitted from the preceding controlled device (200) via the second signal line (400), and the controlling device (100) or the preceding controlled device ( a device number holding means (700) that transfers the device number transmitted from the control device (200) to a subsequent controlled device (200) without delay;
100) or the control signal transmitted from the preceding stage controlled device (200) is given a delay equal to the period during which one of the device numbers is transmitted on the first signal line (300), and A device number setting method characterized by comprising a delay means (800) for transmitting data to a controlled device (200).