JPH01100649A - Equipment number setting system - Google Patents

Abstract

PURPOSE:To automatically set an equipment number to be given to respective devices, to decrease the man-hour of the processes of an equipment number setting and to prevent the generation of an artificial error by providing an adding circuit to add a numeric value '1' to a numeric value inputted from an input terminal and output it to the respective equipments of an equipment number setting system. CONSTITUTION:One main equipment 1 and two slave equipments 2-1 and 2-2 are connected by a common bus 3 of the equipment number setting system, adding circuits 204 are provided on the respective slave equipment 2-1 and 2-2 and the equipment number is set by the adding circuits 204. 001 of the numeric value '1' is inputted to the binary value of three digits inputted to an input terminals 21-23 of the adding circuits 204, the numeric value is added and it is outputted to output terminals 24-26. The outputs of the terminals 24-26 of the adding circuit 204-1 of the equipment 2-1 are inputted to the input terminals 21-23 of the adding circuit 204 of the next-step equipment 2-2 through a line 4 for transmitting the equipment number. A collating circuit 202 of the equipment 2-2 to collates it with the equipment number accumulated in an address register 203 and the coincident slave equipment receives data from the bus 3.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to an improvement of a machine number setting method for assigning a machine number to each device in a system composed of a plurality of devices, without expending a lot of man-hours and eliminating human errors. With the aim of realizing a machine number setting method that does not occur, in a system consisting of multiple devices, each device is equipped with an adder circuit that adds the numerical value to the numerical value input to the input terminal and outputs it from the output terminal. The output terminal of the adder circuit provided in each device is connected to the input terminal of the adder circuit provided in the next device via the machine number transmission signal line, and the output terminal of the adder circuit provided in each device is connected via the signal line for transmitting the machine number. The configuration is such that when a predetermined initial value is input to the input terminal of the addition circuit, the addition result output from the output terminal of each addition circuit is set as the machine number of the device equipped with each of the addition circuits. do.

[Industrial application field]

The present invention relates to an improvement in a machine number setting method for assigning a machine number to each device in a system composed of a plurality of devices.

In a system where multiple devices are connected by a common bus, a number (hereinafter referred to as machine number) that identifies each device is assigned in order to deliver the required data to the required device via the common bus. A widely used method is to add the machine number assigned to the delivery destination device to the data delivered via the common bus.

[Conventional technology]

FIG. 3 is a diagram showing an example of a conventional machine number setting method.

In Fig. 3, there are - main devices 1 and two slave devices 2 (
When distinguishing each slave device 2, slave devices 2-1 and 2
-2. ) are connected by a common bus 3.

Each slave device 2 includes terminals 11 to 18 and a machine number setting circuit 20.
1 is provided to set the machine number.

The machine number setting circuit 201 sets the machine number N assigned to each slave W2.
(The machine number assigned to slave device 2-1 is N1, slave device 2-2'
The machine number assigned to the machine is called N. (Same below) is set using two-finger binary numbers.

Each terminal 11.14 and 17 constitutes an input terminal for each digit of the machine number setting circuit 201, and terminals 12.15 and 1
8 are connected to the ground potential which indicates logic "0", and terminals 13, 16 and 19 indicate logic "1" (+)
Each is connected to a potential.

Now, slave device 2-1 has machine number N, -(001)((001)
indicates a binary number, the same applies hereafter], and input the machine number N to the slave device 2-2.
When assigning z-(010) to each slave device 2-
1, the terminal 11 is connected to the terminal 13, the terminal 14 is connected to the terminal 15, and the terminal 17 is connected to the terminal 18. In the slave device 2-2, the terminal 11 is connected to the terminal 12, and the terminal 1 is connected to the terminal 18.
4 to terminal 16, and terminal 17 to terminal 18.

As a result, in the slave device 2-1, the machine number setting circuit 20
Logic "'1", logic "'0" and logic "0" are input to the input terminals 11, 14 and 17 of each digit of 1-1, respectively, and the machine number setting circuit 201-1 is input with the machine number N+. A binary number (001) is set.

Similarly, in the slave device 2-2, the machine number setting circuit 201-
Logic "0", logic "1" and logic ° "0" are respectively input to the input terminals 11, 14 and 17 of each digit of the machine number setting circuit 201-2, and the machine number setting circuit 201-2 receives a binary number (
010) is set.

In such a state, when data is transferred from the main device 1 to each slave device 2 via the common bus 3, the main device 1 uses the address bus 3a in the common bus 3 to assign data to the slave device 2 of the transfer destination. Sends the machine number N that is currently in use.

=4- The machine number N sent to the address bus 3a is stored in the address register 203 in each slave device 2.

In each slave device W2, the verification circuit 202 transfers the device number N stored in the address register 203 to the device number setting circuit 201.
The matching slave device 2 determines that the data transmitted via the common bus 3 is addressed to its own device and receives it.

For example, when the main device 1 sends the device number N= (001) to the address bus 3a in order to transfer data to the slave device W2-1, the verification circuit 202-1 in the slave device 2-1 outputs the device number. Machine number N set in the setting circuit 201-1 = (001
) and the machine number N stored in the address register 203-1.
= (001) and receives the data transmitted via the common bus 3, but the matching circuit 202-2 in the slave W2-2 is set to the machine number setting circuit 201-2. The machine number N, = (002) and the address register 203
-2 is detected, and the data transmitted via the common bus 3 is not received.

The terminals 11 to 19 are connected to slave devices 2-1 and 2-2.
This is often done at the construction stage prior to the start of use, and it takes a lot of man-hours, and even if connections are made with the utmost care, human errors cannot be completely eliminated, resulting in duplicate assignments, etc. Failures may also occur.

[Problem that the invention seeks to solve]

As is clear from the above explanation, in the conventional machine number setting method, in order to assign the machine number N to each slave device 2, it is necessary to connect the terminals 11 to 19, respectively, which requires a lot of man-hours. However, there is a risk of human error and problems such as duplicate settings.

Note that a method of operating a switch instead of connecting the terminals 11 to 19 has also been put into practice, but the same problem exists.

An object of the present invention is to realize a machine number setting method that does not require much 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, 3 is a common bus, and 600 is a device to which machine numbers are set.

700 is an adder circuit provided in each device 600 according to the present invention; 800 is an input terminal of the adder circuit 700;
0 is the output terminal of the adder circuit 700.

4 is a signal line for machine number transmission provided according to the present invention.

[Effect]

Each addition circuit 700 adds the numerical value “1” to the numerical value “N” inputted to the input terminal 800 and outputs the addition result rN+1j from the output terminal 900.

The machine number transmission signal line 4 connects the output terminal 900 of the adder circuit 700 provided in each device 600 to the next device 6.
The input terminal 800 of the adder circuit 700 provided at 00 is connected.

In such a state, when a predetermined initial value "No" is input to the input terminal 800 of the adder circuit 700 provided in the device 600 at the forefront, each adder circuit 700
The addition result rN+lJ outputted from the output terminal 900 of is set as the machine number of the device 600 including each addition circuit 700.

Therefore, the machine number to be assigned to each device is automatically set, the number of man-hours required for setting the machine number is greatly reduced, and the risk of human error is also eliminated.

〔Example〕

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

FIG. 2 is a diagram showing a machine number setting method according to an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

In Fig. 2, there is also a - stand W1 and two slave devices 2.
-1 and 2-2 are connected by a common bus 3.

Each slave device 2 is provided with an adder circuit 204 for setting the machine number.

Each adder circuit 204 adds the numerical value rl''=, (001)(rlJ
represents a decimal number, the same applies hereafter] and outputs from the output terminals 24 to 26.

The output terminals 24 to 26 of the adder circuit 204-1 provided in the slave device 2-1 transmit the machine number to the input terminals 21 to 23 of the adder circuit 204-2 provided in the next stage slave device 2-2. Each digit is connected by a signal line 4.

Furthermore, an adder circuit 20 provided in the slave device 2-1 at the front stage
The input terminals 21 to 23 of 4-1 are the signal lines 4 for transmitting the machine number.
It is connected to the main device 1 by.

Now, assign machine number N, -(001) to slave device 2-1,
-2 is assigned a machine number Nz=(010), then the manufactured W1 is connected to the input terminals 21 to 23 of the slave device 2-1 via the machine number transmission signal line 4 to set the machine number. Input the initial value NO=”0J=(000).

In the slave device 2-1, the adder circuit 204-1 receives the initial numerical value N input to the input terminals 21 to 23. = 'OJ
= (000) plus the number rl = (001),
Addition result = r No + I J = '1' =
(001) is output and set as the machine number N1 of the first slave device 2-1, and is transmitted from the output terminals 24 to 26 to the next stage slave devices 2 to 2 via the machine number transmission signal line 4. .

Also in the slave device 2-2, the adder circuit 204-1 inputs the machine number Nl of the slave device 2-1 input to the input terminals 21 to 23.
=rlJ=Adds the numerical value "1"=(001) to (001), and the addition result='N++1'-'2. +=
(010) is output, the machine number N of the first slave device 2-1 is set, and it is output to the output terminals 24 to 2B.

Note that when the adder circuit 204 does not input any numerical value to the input terminals 21 to 23, the output terminals 24 to 26
If the numerical value “0” is to be output to the main device 1,
Use the slave N2 (-0) as the input terminal, do not input any numerical values to the input terminals 21 to 23, and input the output terminals 24 to 26.
Is it connected to the front-most slave unit by signal line 4 for transmitting the machine number? ! It is possible to connect to the input terminals 21 to 23 of 2-1.

In such a state, when data is transferred from the main device 1 to each slave device 2 via the common bus 3, the main device 1 uses the address bus 3a in the common bus 3 to assign data to the slave device 2 of the transfer destination. When the machine number N is sent out, in each slave device 2, each address register 203 stores the machine number N, as in FIG.
The machine number N accumulated in 3 is compared with the machine number N set in the adder circuit 204, and the slave device 2 that matches the machine number N determines that the data transmitted via the common bus 3 is addressed to its own device. and receive it.

For example, in order to transfer data to the slave device 2-1, the main device 1 sends the device number N=rIJ=(001) to the address bus 3a.
When the verification circuit 202-1 in the slave W2-1 sends the machine number Nl = set in the machine number setting circuit 201-1,
rlJ = (001) and address register 203
-1 is detected to match the machine number N = rlJ = (001) stored in the slave device 202-2, and the data transmitted via the common bus 3 is received.
is the machine number Nz set in the machine number setting circuit 201-2 =
'2J = (002→ and address register 203-
2, and the data transmitted via the common bus 3 is not received.

As is clear from the above explanation, according to this embodiment, the initial numerical value N for setting the machine number from the main device 1, ='OJ = (0
00) to the input terminals 21 to 23 of the adder circuit 204-1 provided in the slave device F2-1 at the frontmost stage, the machine number N+ −'IJ = (001
) and the machine number of slave device 2-2 Nz = r2J = (
010) is automatically set.

Note that FIG. 2 is only one embodiment of the present invention, and for example, the initial numerical value N0 for setting the machine number is not limited to the numerical value "0", and many other modifications may be considered. In either case, the effects of the present invention remain the same. Furthermore, the number of slave devices is not limited to two, and many other modifications may be considered, but the effects of the present invention remain the same in any case.

〔Effect of the invention〕

As described above, according to the present invention, in the system, the machine number to be given to each device is automatically set, the man-hours spent on setting the machine number are significantly reduced, and human error is prevented. The risk of occurrence 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 machine number setting method according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of a conventional machine number setting method. In the figure, l is the main device, 2 is the slave device, 3 is the common bus,
3a is an address bus, 4 is a signal line for machine number transmission, 11 to 19 are terminals, 21 to 23 and 800 are input terminals, 2
4 to 26 and 900 are output terminals, 201 is a machine number setting circuit, 202 is a verification circuit, 203 is an address register,
204 and IL Ice A Two-Mode-Kan-Ren-Gi Bin - Figure 3

Claims (1)

[Scope of Claims] In a system composed of a plurality of devices (600), each device (600) is provided with an output terminal (900) by adding a numerical value "1" to a numerical value input to an input terminal (800). ) are respectively provided, and the adder circuits (700) provided in each of the devices (600)
0) are connected to the input terminals (800) of the adder circuits (700) provided in the device (600) at the next stage via machine number transmission signal lines (4). , When a predetermined initial value is input to the input terminal (800) of the adder circuit (700) provided in the device (600) at the foremost stage, the output terminal ( 900) is set as the machine number of the device (600) including each of the adder circuits (700).