JP2001014072A - Power source alarm monitoring device and monitoring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of ALM signal input lines to a main control package in a power source ALM monitoring a logical circuit of a large scale constituted by plural I/O packages. SOLUTION: ALM signal input lines from I/O packages 200a, 200b... are wired in OR connection and are connected to a control part 110 through an ALM report signal line A. The value of the ALM report signal line A at normal operation is 'H'. When any of the I/O package 200a, 200b... is out of order, the value of the ALM report signal line A becomes 'L' by an ALM signal from the package, which the control part 110 detects. The control part 100 which detects the ALM specifies a fault package by using a bus B and exchanging ALM confirmation signal with each of the I/O packages.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply alarm monitoring apparatus and a monitoring method mainly used for monitoring a power supply abnormality of a large-scale logic circuit or the like.

[0002]

2. Description of the Related Art A large-scale logic circuit includes a plurality of I / O packages, a power supply package for supplying primary power to these I / O packages, and a main control package. Each I / O package is composed of a logic circuit module and a DC / DC (direct current / direct current) converter that receives a primary power supply and supplies power for operating the logic circuit module.

[0003] DC / D mounted in I / O package
In order to detect a failure of the C converter, the prior art uses a circuit configuration as shown in FIGS. In FIG. 6, reference numeral 100 denotes a main control package;
.., a plurality of I / O packages, 30
0 is a power supply package, B is an address bus and a data bus, C is a primary power supply line, and the main control package 100 is an I / O bus through an address bus and a data bus B.
Are connected to the I / O packages 200a, 200b,..., And from the power supply package 300 through the primary power supply line C.
Power is supplied to.

Are I / O package ALM (alarm) report signal lines for I / O packages 200a, 200b,..., Respectively. O package ALM report signal line A
The main control package 100 using a, Ab,.
Will be notified.

[0005] I / O packages 200a, 210b,.
.., 210a, 210b,.
The DC converters 220a, 220b,.
Are logic circuits supplied with power for operation from the DC converters 210a, 210b,....

FIG. 7 is a block diagram showing the detailed configuration of the inside of the control unit 110. In this figure, reference numeral 111 denotes a power supply ALM detection unit, 112 denotes a central control unit, and a power supply ALM.
The LM detection unit 111 receives signals from the I / O package ALM report signal lines Aa, Ab,..., And if at least one of them is detected, the central control unit 11
Notify 2.

[0007]

In the above-mentioned prior art,
Each of the I / O packages 200a, 200b,.
.. Have a plurality of input signal lines to the main control package 100 in proportion to the number of I / O packages. Further, for the same reason, it is necessary to provide a plurality of signal inputs inside the control unit 110, and there is a disadvantage that the circuit configuration becomes complicated. The present invention has been made in view of such circumstances, and has as its object to provide a power supply ALM monitoring device and a monitoring method capable of monitoring a plurality of I / O packages with one ALM report signal line. And

[0008]

According to a first aspect of the present invention, there is provided an I / O package which outputs an alarm signal when a power failure occurs in the I / O package. Means for outputting the alarm signals from the plurality of I / O packages, and one alarm report signal line provided in the main control package and inputted through the alarm report signal line. Means for receiving an alarm signal and detecting a power supply failure; means provided in the main control package for sequentially transmitting an alarm confirmation signal to each of the I / O packages upon detecting a power supply failure; The main control package is provided in the I / O package, and responds to the alarm acknowledgment signal when the I / O package has not failed. And a means provided in the main control package for identifying the power failure of the I / O package by not returning the alarm acknowledge signal from the I / O package. It is characterized by having.

[0009] The invention described in claim 2 is the above-mentioned I / O.
The O package includes a buffer circuit to which a power supply voltage is supplied. The buffer circuit outputs a high potential signal when the power supply of the I / O package is normal, and outputs a high potential signal when the power supply of the I / O package fails. 2. The power supply alarm monitoring device according to claim 1, wherein the power supply alarm monitoring device outputs a low-potential signal and uses an output from the buffer circuit as the alarm signal.

[0010] Further, the invention according to claim 3 provides a plurality of I
A method for monitoring a power supply alarm of a system comprising an I / O package and a main control package for controlling the I / O package, comprising: a first step of issuing an alarm signal from the failed I / O package; A second step in which the main control package detects that any one of the plurality of I / O packages has failed, and wherein the main control package has an alarm for each of the I / O packages; Transmitting an acknowledgment signal and not returning an alarm acknowledgment signal from the failed I / O package to identify the failed I / O package.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an apparatus for monitoring a power supply ALM of a large-scale logic circuit. In this figure, 100 is a main control package,
, 200a, 200b,... Are a plurality of I / O packages, 300 is a power supply package, A is an ALM report signal line,
B is an address bus and a data bus, and C is a primary power supply line.

In the main control package 100,
Reference numeral 110 denotes a control unit.
Are connected to I / O packages 200a, 200b,... Through an address bus and a data bus B.
Reference numeral 120 denotes a pull-up resistor, and the pull-up resistor 120 pulls up the ALM report signal line A.

The I / O packages 200a, 200b,.
..., DC / D 210a, 210b, ...
The C converters 220a, 220b, ... are logic circuits. DC / DC converters 210a, 210b,...
Power is supplied to the DC / DC converter 210a,
, 210b,...
are converted into voltages at which b,.
, 220b,. The DC / DC converters 210a, 210b,...
A signal is output to ALM report signal line A. This ALM signal is wired OR-coupled, and the ALM report signal line A
To the control unit 110 in the main control package 100.

FIG. 2 is a block diagram showing the detailed configuration inside the main control package 100. In FIG.
Reference numeral 11 denotes a power supply ALM detection unit, and 112 denotes a central control unit.
The power supply ALM detector 111 is connected to the ALM report signal line A, and the central controller 112 is connected to the address bus and the data bus B.

Next, the operation of the apparatus when a failure occurs will be described. FIG. 3 is a diagram showing the exchange of signals exchanged between the components of the apparatus, and FIG. 4 is a flowchart showing the operation procedure of the apparatus.

In step 1 of FIG. 4, the power supply ALM detector 111 monitors the state of the ALM report signal line A. During the normal operation of the device, the DC / DC converters 210a, 210b,.
Is "H" (high potential), and these are wired OR-coupled.
The value of the M report signal line A also becomes “H”.

In step 2, ALM report signal line A
Is "H", the power supply ALM detector 111 determines that the device is operating normally, and returns to step 1 to continue monitoring. Here, during operation of the device, DC /
If a failure occurs in the DC converter 210b and the normal output voltage cannot be maintained, the value of the ALM report signal line A becomes “L” (low potential). This corresponds to the signal 301 in FIG. Therefore, power supply ALM detecting section 111 determines that a failure has occurred, and notifies central control section 112 of the fact.

In response to this, the central control unit 112 starts a confirmation process for specifying a failed I / O package. First, in step 3, the central control unit 112 transmits an ALM confirmation signal to the I / O package 200a using the address bus and the data bus B. This corresponds to the signal 302 in FIG. Then I /
Since the O package 200a operates normally, the O package 200a returns an ALM confirmation response signal to the central control unit 112.
This is signal 303 in FIG.

In response to a response signal from the I / O package 200a, the central control unit 112
Determines that the I / O package 200a is normal, and proceeds to check the next package.

In step 6, the central control unit 112 transmits an ALM confirmation signal to the I / O package 200b. This is signal 304 in FIG.
DC / DC converter 2 in I / O package 200b
Since the logic circuit 10b is out of order, power is not supplied to the logic circuit 220b, so that the I / O package 200b
Cannot send an ALM acknowledgment signal. Therefore, the central control unit 112 determines that the I / O package 200b is faulty in step 8 because no response is obtained in step 7.

Next, an embodiment in which the DC / DC converter in the I / O package itself has no function of detecting its own failure and transmitting the ALM signal will be described. FIG. 5 is a block diagram showing a configuration of an I / O package using such a DC / DC converter. In FIG. 5, 5
10 is a DC / DC converter, 520 is a logic circuit, 53
0 is a buffer circuit. The buffer circuit 530 is CM
The power supplied from the DC / DC converter 510 is also input to the buffer circuit 530. The output of the buffer circuit 530 is connected to the ALM report signal line A.

Here, the buffer circuit 530 is a C-MOS
Therefore, when the DC / DC converter 510 fails, the output of the buffer circuit 530 becomes “L”, so that the ALM report signal line A connected by a wired OR is also “L”.
L ”, the central control unit 112 selects one of the I / O
It is possible to detect that a failure has occurred in the package.

[0023]

As described above, according to the first and third aspects of the present invention, since the ALM signal from each I / O package is output-coupled, one signal to the main control package can be provided. Multiple I / Os only with ALM signal input wiring
The package can be monitored, and the normally operating I / O package that sends out the ALM confirmation signal returns an ALM confirmation response signal. Therefore, it is possible to specify that the I / O package that has not responded is faulty. The effect is obtained.

According to another aspect of the present invention, a buffer circuit is provided in an I / O package to provide an ALM.
Since the signal is output, the effect that the I / O package can be monitored can be obtained even when the DC / DC converter itself does not have a function of detecting its own failure and transmitting the ALM signal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a power ALM monitoring device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a main control package of the power ALM monitoring device according to the embodiment.

FIG. 3 is a diagram showing transfer of signals between components for failure detection in the power supply ALM monitoring device according to the embodiment.

FIG. 4 is a flowchart showing a procedure for detecting a failure in the power supply ALM monitoring apparatus according to the embodiment.

FIG. 5 is a block diagram showing a configuration of an I / O package according to another embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a power supply ALM monitoring device according to a conventional technique.

FIG. 7 is a block diagram showing a detailed configuration of a main control package of a power supply ALM monitoring device according to a conventional technique.

[Explanation of symbols]

 Reference Signs List 100 Main control package 110 Control unit 111 Power supply ALM detection unit 112 Central control unit 120 Pull-up resistor 200a, 200b,... I / O package 210a, 210b,. Circuit 300 Power supply package 500 I / O package 510 DC / DC converter 520 Logic circuit 530 Buffer circuit A ALM report signal line B Address bus and data bus C Primary power supply line

Claims (3)

[Claims] 1. A power alarm monitoring device in a system including a plurality of I / O packages and a main control package for controlling the I / O packages, wherein the power alarm monitoring device is provided in the I / O package and includes a power supply circuit of the I / O package. Means for outputting an alarm signal in the event of a failure; one alarm report signal line which outputs and couples the alarm signals from the plurality of I / O packages; and an alarm report signal line provided in the main control package. Means for receiving the alarm signal input through the main control package and detecting a power failure; and providing an alarm confirmation signal for each of the I / O packages provided in the main control package when the power failure is detected. Means for sequentially sending, an alarm provided in the I / O package, and an alarm if the I / O package has not failed. Means for transmitting an alarm acknowledgment signal to the main control package in response to an acknowledgment signal; provided in the main control package, and the I / O package being configured not to return the alarm acknowledgment signal from the I / O package; A power alarm monitoring device, comprising: means for identifying that a package has a power failure. 2. The I / O package is a buffer circuit to which an output voltage of an internal power supply circuit is supplied,
A buffer circuit that outputs a high-potential signal when the power supply circuit is normal, and outputs a low-potential signal when the power supply circuit is faulty; wherein an output from the buffer circuit is used as the alarm signal. The power supply alarm monitoring device according to claim 1, wherein 3. A method for monitoring a power supply alarm of a system comprising a plurality of I / O packages and a main control package for controlling the I / O packages, wherein a first step of issuing an alarm signal from the failed I / O package; A second process in which the alarm signal is output-coupled by a wired OR, and the main control package detects that one of the plurality of I / O packages has failed; and A third step of sending an alarm acknowledgment signal to the I / O package and identifying the failed I / O package by not returning an alarm acknowledgment signal from the failed I / O package; A power alarm monitoring method, comprising: