JPH06303211A - Alarm transmission device - Google Patents

Abstract

PURPOSE:To discriminate the type of an alarm signal and to securely recognize the restoration of the occurrence of signal abnormality on a reception-side by multiplexing plural alarm signals and transmitting the alarm signals thorough the use of two private lines for an alarm and for restoration. CONSTITUTION:A signal detection means 1 is provided with signal detection parts 1A-1D detecting monitor signals A-D and outputting an abnormal signal or a restoration signal. A switching signal outputting means 3 outputs an alarm restoration switching signal delayed by signal width which is set by the delay means DA-DD of the respective signal detection parts 1A-1D. The level setting switches of an alarm-side pulse generation means 6 and a restoration-side pulse generation means 7 are changed over and set by the outputs of respective alarm restoration switching parts 2A-2D in an alarm restoration switching means 2. The outputs of an alarm-side output generation means 4 and a restoration-side output generation means 5 are respectively inputted and pulse signals obtained by multiplexing signals in the abnormality or the restoration of respective signals are outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to device-to-device communication by a wired line, and relates to an alarm transmission device for transmitting a plurality of alarms from one device to another device.

[0002]

2. Description of the Related Art In communication between devices using a wired line, in addition to a main signal to be transmitted, a plurality of alarm signals for the purpose of maintenance or maintenance between the devices are added to the above main signal to enable communication from one device. It is being transmitted to another device. For example, as shown in FIG. 7, in the case of transmitting an alarm signal based on a signal abnormality in the conventional device, each alarm signal A to D is individually transmitted in order to identify which signal the abnormality occurs on the other side. The other side was transmitting via the leased lines A _{L to} D _L. In FIG. 7, 28 is an exchange terminal, 29 is a main control station, and an alarm signal A detected in the exchange terminal 28 is shown.
~D a dedicated line A _L ~D provided corresponding
_It is transmitted to the main control station 29 via _L.

[0003]

Since the conventional alarm transmission device is constructed as described above, the alarm signal transmitted to the main control station is identified when the signal abnormality of a plurality of signals must be monitored. Therefore, there has been a problem that a dedicated line corresponding to each alarm signal must be individually provided for transmission.

The present invention has been made to solve the above problems, and multiplexes a plurality of alarm signals to be transmitted from a terminal to a main control station, and is dedicated to two lines for alarm and recovery. Since an alarm signal is transmitted using a line, it is an object of the present invention to provide an alarm transmission device having a novel configuration in which the type of the alarm signal can be identified on the receiving side and the occurrence and recovery of the signal abnormality can be surely recognized. To do.

[0005]

An alarm transmission device according to the present invention is a device for transmitting a plurality of alarm signals based on signal abnormality or abnormality recovery from one device to another device, wherein the plurality of alarm signals are transmitted. Detecting means, an alarm pulse generating means for setting an abnormal side pulse value by an alarm signal based on the signal abnormality of the signal detecting means, and an alarm based on the abnormality recovery of the signal detecting means. The recovery side alarm pulse generating means for setting the pulse value on the recovery side by the signal is provided in one device, and the pulse signal of the abnormal side alarm pulse generating means and the pulse signal of the recovery side alarm pulse generating means are provided. The data is transmitted to the other device via different lines.

[0006]

According to the first aspect of the present invention, the alarm transmission device duplicates a plurality of alarm signals by the outputs of the abnormal side alarm pulse generating means and the recovery side alarm pulse generating means, and transmits them from one device to the other. . In the alarm transmission device according to the second aspect of the present invention, a plurality of alarm signals are multiplexed by the alarm multiplexing means and transmitted from one device to the other device.

[0007]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of an alarm transmission device provided in, for example, an exchange terminal and monitoring a signal abnormality in the terminal. In FIG.
Reference numeral 1 denotes a signal detection unit that detects a monitoring signal in the terminal and outputs an abnormality or recovery signal corresponding to abnormality or recovery based on the signal state and a change detection signal based on the signal state change. The signal detecting means is provided for each of the signal detecting sections, and the signal detecting sections set the signal widths of the abnormal signal or the recovery signal and the change detecting signal output by the delaying means D _{A to} D _D respectively provided. 2 is 1
It is composed of a set of latch circuits and a set of D-flip-flop circuits, and when the above-mentioned abnormal signal is input, the alarm side switch is restored. When a signal is input, the recovery side switch is turned on. Alarm / recovery switching means 3 having a plurality of switching units 2A to 2D, and 3 is the signal detecting units 1A to 1 described above.
Switching signal output means comprising a NAND circuit for inputting the output of D and outputting an alarm recovery switching signal delayed by the signal width set by the delay means D _{A to} D _D respectively. The output of this switching signal means 3 is one terminal. The output generating means 4 is an alarm side and the recovery side is an output generating means. 6 and 7 are alarm recovery switching units 2
The level setting switch of the level setting circuit is switched and set by the outputs of A to 2D, the outputs of the alarm side output generating means 4 and the recovery side output generating means 5 are respectively input, and a pulse in which signals in each signal abnormality or recovery are multiplexed Reference numeral 6 is a pulse generation means for outputting signals, 6 is an alarm side pulse generation means, and 7 is a recovery side pulse generation means. Reference numeral 8 is an alarm multiplexing device having the above configuration.

Next, the operation will be described with reference to FIG.
FIG. 2 is a signal waveform diagram of each part in the alarm multiplex transmission device 8 shown in FIG. In Figure 2, each signal waveform diagram (a)
1 to (g) correspond to points a to g shown in FIG. 1, respectively. First, a case where an abnormality occurs in the monitoring signal will be described. Since the operation of each component for each supervisory signal is the same, the explanation will be given using two signals of supervisory signals A and B.
If a signal abnormality occurs in the monitoring signals A and B, Fig.2- (a)
As shown in FIG. 5, the supervisory signals A and B indicate Hi level, respectively. Signal detection unit 1A, 1B outputs a monitor signal A, B abnormalities such as the input shown in FIG. 2-(b) signal A _b, B _B and the change signal A _H of the Hi level. Signal width of the addition abnormality signal A _b, B _B and the change signal A _H signal detection section 1
Delay means D _A and D _B respectively provided in A and 1B
Is set to have a predetermined width. Signal detector 1
In A and 1B, when the signal is abnormal, the abnormal signals A _b and B _b
However, the recovery signals A _b 'and B _b ' are output at the time of recovery, and the corresponding alarm / recovery switching units 2A and 2B are output.
It said abnormality signal A _b, B _b alarm latch circuit and is input R _A to R output ON state becomes the alarm side of the D- flip-flops D _A in _B, fig. 2-(c to the input terminal of the D _B to The outputs of the alarm side latch circuits R _A and R _B are input at the timings shown in). Also, the change signals A _H and B _H are NAN
The switching signal ALM, which is input to the switching output means 3 constituted by the D circuit and is inverted, is output. In this case, the switching signal A output by the switching output means 3 is such that the timing at which the signal abnormality occurs in the alarm signals A, B is shorter than the time width set by the delay means D _A , D _B.
The LM changes the change signal A _H to the change signal B as shown in FIG. 2- (d).
It is output as a switching signal with an inverted signal width obtained by accumulating the _H signal width. Therefore, in the alarm / recovery switching means 2, the alarm side D-flip-flops D _A and D _B corresponding to the monitoring signals A and B, respectively, are indicated by the abnormal signals A _b and B _b output from the signal detection units A1 and B1. The output standby state is set at the timing shown in 2- (c).
When the switching signal ALM from the switching output means 3 shown in (d) is input to the clock terminals of the alarm side D-flip-flops D _A and D _B , the monitoring signal A as shown in FIG.
The output of the alarm side D-flip-flop D _A corresponding to the alarm side D-flip-flop D _It is output at the same time as the output of _B. FIG. 2- (e) shows a signal waveform diagram at the output point d of the alarm recovery switching means 2. In this way, the rising edge of the abnormal signal due to the signal abnormality that occurs later follows the rising edge of the abnormal signal based on the signal abnormality that occurred earlier at an interval shorter than the signal width set by the delay means provided in the signal detecting means 1. If the error occurs, the outputs of the alarm recovery switching units 2A and 2B based on the previously generated signal abnormality are not output in response to the signal rising of the abnormal signal based on the previously generated signal abnormality, and the signal abnormality that occurs later. Is output in response to the rising edge of the abnormal signal.

The alarm side pulse generating means 6 is provided with an output pulse setting circuit P for setting different pulse levels corresponding to the respective monitor signals, and the alarm side D- output corresponding to the monitor signals A and B. The outputs of the flip-flops D _A and D _B are output pulse setting circuits P _A and P corresponding to the monitoring signals A and B.
Pulse level setting switch S _A in _B, the pulse level set as the switching signal S _B switches S _A, S _B
To ON state. The output of the alarm side output means 4 is input to the alarm side pulse signal generating means 6 in which the pulse level is set in this way, and the pulse level setting circuits P _A , P
The pulse signal having the predetermined width set by _B is output. The pulse level setting circuits P _A and P _B for setting the pulse level corresponding to each of these monitoring signals are connected in parallel, and the pulse corresponding to the combination of the ON states of the pulse level setting switches S _A and S _B. The level can be set. For example, as shown in this embodiment, four types (A,
When the abnormal recovery of the signals (B, C, D) is monitored, each pulse width is set as shown in Table 1 corresponding to the combination of the ON states of the pulse level setting switches S _{A to} S _D.

[0010]

[Table 1]

As described above, when the alarm signal based on the signal abnormality generated in the plurality of monitoring signals A to D is timely transmitted to the other main control surface side, the pulse level having the time constant corresponding to each monitoring signal. Since the pulse level setting means in which the setting circuits P _{A to} P _D are connected in parallel is switched and controlled by the switching signal for each supervisory signal based on the signal abnormality, a plurality of signal abnormalities occurring in the terminal are simultaneously caused. It can be transmitted by a single line. The pulse width of each pulse signal based on each signal abnormality output from the pulse signal generating means 6 and 7 is set by the time constant of each pulse level setting circuit P _{A to} P _D of the pulse level setting means, so it is monitored in advance. If the number of signals is known, the number of combinations can be predicted.Therefore, if a pulse level setting circuit with a different time constant is set by the number of combinations, the pulse of the alarm pulse signal is received on the main control station side that receives each pulse signal. It is possible to immediately identify which monitoring signal has an abnormality in the width.

Here, there is a problem to be considered in multiplexing the alarm signal. That is the case when signal anomalies for each supervisory signal occur consecutively at very short intervals. It is almost unlikely that the signal anomalies of the respective supervisory signals will occur at the same time, and even if it seems that they usually occur at the same time, there is a time lag in the timing of the anomalies. In this case, while the alarm pulse signal based on the signal abnormality that has occurred first is being output from the alarm side pulse signal generating means 6, the alarm pulse signal based on the signal abnormality that has occurred later is output and the alarm pulse signal is not received. On the side of the main control station, an error occurs in signal identification. In the above embodiment of the present invention, the alarm side pulse signal generating means 6 is provided in the signal detecting means 1, and the delay time of the delay means D _{A to} D for setting the signal width of each signal output from the signal detecting means 1 is set to the alarm side pulse signal generating means 6. It is adjusted so that it is longer than the pulse width of the alarm pulse signal of the longest time width output from, and the signal abnormality that occurred within that time width is handled by the switching signal output means at the same time as the above. Such duplication of alarm pulse signals does not occur.

When the monitor signal recovers from the abnormal signal state to the normal state, the signal detecting means 1, the alarm recovery switching means 2, the switching signal output means 3, the recovery side output generating means 5 and the recovery side pulse signal generating means. Similarly to the case where the signal abnormality occurs due to 7, the recovery pulse signal based on the signal recovery of each supervisory signal is transmitted to the main control station side.

Example 2. Next, another embodiment of the present invention will be described with reference to FIG.
And FIG. 4 will be described. FIG. 3 is a block diagram showing the overall configuration of an alarm multiplexing transmission device based on a change in the number of pulses, FIG.
2A and 2B are signal waveform diagrams at the input / output of the alarm multiplexer shown in FIG. 1, where (a) shows before input and (b) shows after output. In the first embodiment, the types of signals are divided according to the time width of the signal, whereas the types of alarm and recovery pulse signals are divided according to the number of pulses. In the first embodiment, since the receiving side reads the time width, a reading error is likely to occur, whereas the counting by the number of pulses causes less error.

The operation will be described. First, each of the alarm signals A to D is input to the alarm reading unit 9, and the occurrence and recovery of the signal abnormality are detected. Similar to the time width of the first embodiment, the pulse controller 10 controls the number of pulses suitable for the type of alarm to be the preset number of pulses. The pulse is generated from the alarm rising operation pulse generation unit 11 at the time of alarm rising and generated from the alarm falling operation pulse generation unit 12 at the time of alarm falling and transmitted via the alarm generation line 13 and the alarm recovery line 14.

Embodiment 3. Still another embodiment will be described with reference to FIGS. FIG. 5 is a block diagram showing the configuration of an alarm multiplex transmission apparatus by changing the pulse interval of two pulses, and FIG. 6 is a signal waveform diagram for this alarm multiplex transmission apparatus. (a) shows the input and (b) shows the output. The alarm multiplex transmission apparatus according to the present embodiment transmits the rising pulse and the falling pulse of the signal instead of the time width of the first embodiment and the pulse number of the second embodiment, and the alarm type is based on the time width between the pulses. Is to do. According to this method, even if a pulse is generated due to some error in the transmission path, it is possible to perform control such that it is not considered as an alarm generation unless the falling pulse is transmitted within a certain time.

The operation will be described. First, the alarm capturing unit 17 detects which alarm has occurred and recovered. The alarm generation time width setting unit 18 and the alarm recovery time width setting unit 19 control the time width from the rising pulse to the falling pulse corresponding to the alarm. In response to this, an alarm is generated
The recovery rising signal generation unit 20 and the alarm generation / recovery falling signal generation unit 21 transmit each pulse signal via the alarm generation line 22 or the alarm recovery line 23, respectively.

[0018]

As described above, according to the present invention, a plurality of alarm signals based on signal abnormality or abnormality recovery are multiplexed by the alarm multiplexing means, and further alarm side alarm pulse generation means based on the signal abnormality and abnormality recovery, and Since the pulse signals from the recovery-side alarm pulse generating means are transmitted from one device to the other device via separate lines, the other device to which the plurality of alarm signals have been transmitted has a signal abnormality. The effect that the type of signal can be identified and the occurrence of signal abnormality can be reliably recognized is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an alarm multiplexing transmission device of the present invention.

FIG. 2 is a signal waveform diagram in each part of the alarm multiplex transmission device of the present invention.

FIG. 3 is a block diagram showing an alarm multiplexing transmission device according to another embodiment of the present invention.

FIG. 4 is a signal waveform diagram for the alarm multiplexing transmission device shown in FIG.

FIG. 5 is a block diagram showing an alarm multiplexing transmission device according to another embodiment of the present invention.

FIG. 6 is a signal waveform diagram of the alarm multiplexing transmission device shown in FIG.

FIG. 7 is an explanatory diagram of a conventional alarm transmission device.

[Explanation of symbols]

 1 signal detection means 2 alarm / recovery switching means 3 switching signal output means 4 alarm side output generation means 5 recovery side output generation means 6 alarm side pulse signal generation means 7 recovery side pulse signal generation means

Claims (3)

[Claims] 1. A device for transmitting a plurality of alarm signals based on signal abnormality or abnormality recovery from one device to another device, the signal detecting means for detecting the plurality of alarm signals, and the signal detecting means. Abnormal side alarm pulse generating means for setting the pulse value on the abnormal alarm side by the output signal based on the signal abnormality, and the pulse value on the recovery alarm side by the output signal based on the abnormal recovery of the signal detecting means ,
A recovery side alarm pulse generating means is provided in one device, and the pulse signal of the abnormal side alarm pulse generating means and the pulse signal of the recovery side alarm pulse generating means are transmitted to the other device via separate lines. An alarm transmission device characterized by: 2. A device for transmitting a plurality of alarm signals based on signal abnormality or abnormality recovery from one device to another device, the signal detecting means for detecting the plurality of alarm signals and the signal detecting means described above. Alarm recovery switching means for switching the output state of the pulse width setting circuit provided for each of the plurality of alarm signals to the alarm side or the recovery side by the output based on the alarm signal when the signal is abnormal or recovered, and the pulse. A width setting circuit is connected in parallel to form alarm multiplex means, and alarm pulse generating means for outputting a pulse signal on the abnormal side or the recovery side, respectively, according to the output multiplexed by the alarm multiplex means. An alarm transmission device, characterized in that the outputs of the alarm side and the recovery side of the alarm pulse generating means are transmitted to the other device through separate lines. 3. The pulse signals multiplexed by the abnormal-side alarm pulse generating means and the recovery-side alarm pulse generating means in claim 1, are output by changing the pulse width, the number of pulses, or the phase between pulses, respectively. An alarm transmission device characterized in that