JPH0736554B2 - Device number confirmation device and affiliated device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an apparatus number confirmation apparatus for detecting a duplication of a number given to each apparatus in a series apparatus made up of a plurality of apparatuses given numbers, The present invention relates to an affiliated device configured by a device including the device number confirmation device.

[Conventional technology]

As one of such conventional related devices, there is a communication device in which a plurality of devices are connected by a cable and communication is performed between the respective devices. In this type of communication device, a maintenance person sets a device number for each device and uses the device number as a communication control address when communication is performed between the devices.

[Problems to be Solved by the Invention]

In such a conventional communication device, since a person sets the device number, the device number may be set incorrectly, and the same number may be given to a plurality of devices in duplicate. In that case, it becomes impossible to perform normal communication between the devices. Therefore, it is necessary to notify all the duplicated devices that the device numbers are duplicated and display some kind of alarm, but communication between the devices is performed based on the device number set by mistake, so the alarm Display is also difficult.

An object of the present invention is to solve such a problem and to configure by using a device number confirmation device that automatically detects a device number when it is set redundantly and the device number confirmation device. And an affiliated device.

[Means for Solving the Problems]

According to a first aspect of the present invention, each device has a first connector and a second connector, a second connector of one device is sequentially connected to a first connector of another device, and a device number line corresponding to a device number is provided. In a device number confirmation device of a plurality of devices connected in cascade, a signal representing a numerical value is received from the first connector, a predetermined numerical value is added to the numerical value represented by the signal, and a signal representing the addition result is The addition means for outputting to the second connector, the signal generation means for generating a predetermined signal corresponding to the numerical value represented by the signal from the first connector, the storage means for storing the device number, and the storage means Distributing means for outputting the predetermined signal generated by the signal generating means to a device number line corresponding to the device number to be stored, and a signal from the device number line corresponding to the device number stored in the storage means. Selecting means for selecting and outputting, and a signal comparing means for judging whether or not the signal generated by the signal generating means and the signal output by the selecting means match, and outputting a predetermined signal indicating the judgment result, The serial device of the second invention is characterized by including: a plurality of devices provided with the device number confirmation device of the first invention, and the device number confirmation device provided in the device having a higher order. A signal line connecting the second connector of the device and the first connector of the device number confirmation device included in the device of the next order, and a plurality of the plurality of devices that connect all of the plurality of devices in a bus format. And a device number line.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an example of the device number confirmation device according to the first invention, and FIG. 4 is according to the second invention in which the device number confirmation device of FIG. 1 is provided for each of four devices. It is a block diagram showing an example of an affiliated device.

First, in FIG. 1, a 2-bit digital signal indicating the connection order of the device is input from the two connection order confirmation lines 1U and 0U, and the adder circuit 102 receives this signal through the connector 101. The adder circuit 102 adds "1" to the binary number represented by this digital signal and outputs the digital signal to the two connection order confirmation lines 1L and 0L through the connector 103. The signal generation circuit (PG) 104 receives a digital signal input to the connector 101 and outputs the digital signal values “00”, “01”,
According to "10" and "11", as shown in FIG. 2, signals of connection order 1 to 4 are output. These signals form a pattern in 8 time slots and are signals that continuously repeat the pattern. When no other device is connected through the connection order confirmation lines 1U and 0U, the connector 101 is opened, and at this time, the addition circuit 1
02 and the signal generation circuit 104 are assumed to receive a digital signal whose value is "00".

The device number setting switch 113 is for setting the device number. For example, when the maintenance person operates the device number to set the device number, the device number memory 105 stores the number. The device number display 112 is for displaying the device number stored in the memory 105.

The distribution circuit 106 outputs the signal output from the signal generation circuit 104 to the device number line corresponding to the device number stored in the memory 105 among the device number lines 0 to 3 in the bus format. The output section of the distribution circuit 106 is an interface composed of open-collector type transistors, as schematically shown in FIG. Therefore, when signals are output from the distribution circuits of multiple devices to the same device number line,
The signal of “0” level has priority. Selection circuit 10
7 takes in a signal from the device number line corresponding to the device number stored in the memory 105 among the device number lines 0 to 3, and outputs the signal.

The signal comparison means 111 compares the signal output from the signal generation circuit 104 with the signal output from the selection circuit 107, and outputs a collision detection signal indicating that there is no duplication in the device numbers when they match. On the contrary, when they do not match, a collision detection signal indicating that there is a duplication in the device numbers is output. The comparison means 111 includes a comparison circuit 108 that outputs a signal representing the difference between the signal output by the signal generation circuit 104 and the signal output by the selection circuit 107, and the comparison circuit 1 that uses the signal delay in each unit.
08, a delay circuit 109 that removes pulse-like noise generated in the output signal, and a mono-multivibrator that outputs a pulse having a time width of 8 time slots or more as a collision detection signal, triggered by the output signal of the delay circuit 109 ( M /
M) 110.

Next, the configuration of the affiliated device according to the second invention shown in FIG. 4 will be described. This series device consists of four devices,
The number confirmation device of FIG. 1 is incorporated in each device. However, for simplicity of illustration, 2 out of 4 devices
Showed only one. Each device is given a rank, the first device 501 is given a rank 1 and the second device 502 is given a rank 2 respectively. Each device has an inter-device connection connector 503 for connecting with a device having a higher rank,
An inter-device connection connector 504 for connecting with a device having a lower rank is provided. Each device is connected by an inter-device connection cable 505 that connects the connector 504 of the device and the connector 503 of the device of the next rank. The cable 505 includes connection order confirmation lines 1U, 0U, 1L, 0L and bus type device number lines 0 to 3. The connector 101 and the connector 103 of the device number confirmation device of FIG. 1 are included in the connector 503 and the connector 504, respectively.

Next, the operations of the device number confirmation device and the affiliated device thus configured will be described. For example, when the maintenance person operates the device number setting switch 113 of each device including the devices 501 and 502 to set a device number of 0 to 3 for each device, the device number memory 105 of each device stores the number.

Then, since the rank of the first device 501 is 1, its connector 503 is opened, and the adder circuit 102 and the signal generation circuit are
A digital signal whose value is “00” is input to 104. Since the adder circuit 102 adds “01” to this signal and outputs it, the second
A digital signal having a value of "01" is input to the device 502 through the connectors 503 and 504 (and thus through the connectors 101 and 103). Similarly, digital signals having values "10" and "11" are input to the third and fourth devices, respectively. Upon receiving the digital signal, the signal generation circuit 104 of each device outputs the signals of the connection order 1 to 4 shown in FIG. 2 according to the value.

The distribution circuit 106 outputs the signal output from the signal generation circuit 104,
It is output to any of the device number lines 0 to 3 corresponding to the device number stored in the memory 105. Further, the selection circuit 107 fetches a signal from any one of the device number lines 0 to 3 corresponding to the device number stored in the memory 105, and the signal comparison means 11
Output to 1.

In the signal comparison means 111, the comparison circuit 108 takes the difference between the signal from the selection circuit 107 and the signal from the signal generation circuit 104, and the delay circuit 109 removes the noise pulse contained in the signal and outputs it to the mono-multivibrator 110. To do. When the signal from the delay circuit 109 includes a pulse, the mono-multivibrator 110 is triggered by the pulse,
A pulse having a time width corresponding to a time slot is output as a collision detection signal.

If the device number is set correctly here,
Since signals are output from only one distribution circuit 106 to each of the device number lines 0 to 3, the signals fetched from the device number lines 0 to 3 by the selection circuit 107 of each device have a slight delay, but each device does not have a delay. The signal generated by the signal generation circuit 104 in FIG. Therefore, the output signal of the comparison circuit 108 of each device includes only the noise pulse, which is removed by the delay circuit 109, so that the mono-multivibrator 110 is not triggered and the collision detection signal indicating the duplication of the device number is not generated. No output.

However, for example, with device 501 and device 502,
If the setting of 113 is incorrect and 0 is stored as the same device number in the memories 105 of the two devices, in this case, the distribution circuit 106 of the device 501 outputs the signal generation circuit to the device number line 0.
Outputs the connection order 1 signal from 104, and the distribution circuit of the device 502
106 also outputs a signal of connection order 2 from the signal generation circuit 104 to the device number line 0. As a result, the signal on the device number line 0 is the fifth signal.
It will be as shown in the figure. And the selection circuit 10 of both devices
7 inputs a signal from the device number line 0 based on the number stored in the memory 105 and outputs it to the comparison means 111. First, the comparison circuit 108 of the comparison means 111 of the device 501 takes the difference between the signal from the device number line 0 and the signal from the signal generation circuit 104, and outputs the signal A as shown in FIG. After passing through the delay circuit 109, the mono multivibrator 110 is triggered, and the mono multivibrator 110 outputs a pulse indicating the duplication of the device numbers as a collision detection signal. On the other hand, in the device 502, the comparison circuit 108 takes the difference between the signal from the device number line 0 and the signal from the signal generation circuit 104,
Since the signal B as shown in FIG. 5 is output, this signal triggers the mono-multivibrator 110 after passing through the delay circuit 109, and the mono-multivibrator 110 uses the pulse indicating the duplication of the device numbers as the collision detection signal. Output. That is, when the device numbers are duplicated, a collision detection signal indicating the duplication is output by both devices to which the numbers are set.

When the device numbers are duplicated, the pulse output from the comparison circuit 108 is repeatedly output at a cycle of 8 time slots, and the time width of the pulse output from the mono multivibrator 110 is 8 time slots or more. If there is, the collision detection signal is always high level.

〔The invention's effect〕

As described above, the device number confirmation device according to the first invention receives a signal representing a numerical value from the first connector, adds a predetermined numerical value to the numerical value represented by the signal, and outputs a signal representing the addition result to the second connector. The adding means for outputting to the connector, the signal generating means for generating a predetermined signal corresponding to the numerical value represented by the signal from the first connector, the storing means for storing the device number, and the device number for storing the device number. Distribution means for outputting a predetermined signal generated by the signal generating means to the corresponding device number line, selecting means for selecting and outputting a signal from the device number line corresponding to the device number stored in the storage means, and signal generation It is provided with signal comparison means for determining whether or not the signal generated by the means matches the signal output by the selection means, and outputting a predetermined signal indicating the determination result.

Also, the affiliated device according to the second invention is provided with a plurality of devices, which are provided with the order, and provided with the device number confirmation device according to the first invention; Signal lines for connecting the first connector of the device number confirmation device included in the device of No. 1 and a plurality of the device number lines for connecting all of the plurality of devices in a bus format.

Therefore, by configuring the affiliated device according to the second invention by using the device number confirmation device according to the first invention, when the numbers of the respective devices of the affiliated device are duplicated, it is automatically detected. , A predetermined signal is output as an alarm signal in each device having the same number.

[Brief description of drawings]

1 is a block diagram showing an embodiment of a device number confirmation device according to the first invention, FIG. 2 is a timing chart showing signals output from a signal generation circuit of the device number confirmation device of FIG. 1, and FIG. Is a block diagram showing in detail a part of the device number confirmation device of FIG. 1, FIG. 4 is a block diagram showing an embodiment of the affiliated device according to the second invention, and FIG. 5 is an operation of the affiliated device of FIG. 3 is a timing chart for explaining the above. 0 to 3 …… Device number line 0U, 0L, 1U, 1L …… Connection order confirmation line 101,103 …… Connector 102 …… Adding circuit 104 …… Signal generation circuit 105 …… Device number memory 106 …… Distribution circuit 107 …… Selection circuit 108 …… Comparison circuit 109 …… Delay circuit 110 …… Mono multivibrator (M / M) 111 …… Signal comparison means 501,502 …… First and second devices 503,504 …… Inter-device connection connector 505 …… Device Connection cable

Claims (3)

[Claims] 1. A first connector and a second connector are provided in each device, the second connector of one device is sequentially connected to the first connector of another device, and the device number line corresponding to the device number is connected. In a device number confirmation device for a plurality of devices connected in cascade, a signal representing a numerical value is received from the first connector, a predetermined numerical value is added to the numerical value represented by the signal, and the signal representing the addition result is the first signal. Adder means for outputting to the second connector, signal generating means for generating a predetermined signal corresponding to the numerical value represented by the signal from the first connector, storing means for storing a device number, and this storing means for storing Selecting the signal from the distribution means for outputting the predetermined signal generated by the signal generating means to the device number line corresponding to the device number, and the signal from the device number line corresponding to the device number stored in the storage means. And a signal comparing means for determining whether or not the signal generated by the signal generating means and the signal output by the selecting means match each other and outputting a predetermined signal indicating the determination result. A device number confirmation device characterized by being provided. 2. The signal comparing means outputs a signal representing a difference between a signal generated by the signal generating means and a signal output by the selecting means, and an output signal of the comparing means for a predetermined time. The device number confirmation according to claim 1, further comprising: a delay unit that delays and outputs only the delay unit, and a mono-multivibrator that outputs a pulse on a predetermined time axis, triggered by an output signal of the delay unit. apparatus. 3. A plurality of devices, which are provided with ranks, and which are provided with the device number confirmation device according to claim 1 or 2, and the second connector of the device number confirmation device which is provided in the device with a higher rank. And a signal line connecting the first connector of the device number confirmation device included in the device of the next order and a plurality of device number lines connecting all of the plurality of devices in a bus format. Affiliated device.