JPH09128104A - Hot line inserting/ejecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to interrupt a power supply for a package generating a fault without interrupting a power supply for a package in normal operation at the time of inserting/ejecting hot lines into/from packages in an information processor. SOLUTION: In the case of ejecting a hot line from a package causing a fault in a device consisting of plural packages, power supply only to the package causing the fault is interrupted. The hot line inserting/ejecting device is constituted of fault detection parts 11 to 13 for detecting the occurrence of faults in respective packages and a hot line insertion/ejection control part 2 for inputting detection signals from the detection parts 11 to 13 and sending instructions to respective package malfunction preventing parts 21, 22. At the time of inputting a live signal from the control part 2, each of the preventing parts 21, 22 outputs an active signal by neglecting a signal from a power supply control switch 3 connected to the other end, and when the live signal is not inputted, validates the signal from the switch 3 and outputs an active signal to its corresponding power supply switching part 31, 32 or 33, which supplies power to its corresponding substrate element group 41, 42 or 43 included in the package. Thus the signal power supply control switch 3 is used under the control of the control part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-swap device, and in particular, when a package mounted on an information processing device is hot-swapped, the power supply of the normally operating package is not shut off but only a faulty package The present invention relates to a hot-swap method for shutting off the power of

[0002]

2. Description of the Related Art Some information processing devices have packages having various functions that can be independently attached and detached, such as an interface board and an expansion board. Such package insertion / removal is usually performed with the power supply cut off for the purpose of preventing an impulsive voltage and current when the circuit is interrupted. However, if the operation of the device cannot be stopped, hot plugging is performed to cut off the power supply for each package and insert and remove the package.

As a conventional hot-swap system, for example, there is a technique described in JP-A-5-158584. A block diagram of this prior art is shown in FIG. According to this, a large number of packages (here, three, for example) B1, B2, B
3 is attached. The packages B1, B2, B3
Operates by being supplied with power from the power supply A. Further, in order to cut off the power supply, the power control switch SW
1, SW2, SW3 are provided. Furthermore, the operation of the package is monitored for each package, and when a failure occurs, a failure detection section for detecting the failure, a failure detection section C1 for the package B1, and a failure detection section C2 for the package B2.
However, the package B3 is provided with a failure detection unit C3.

On the other hand, in the package, power supply switching sections D1, D2 and D3 for distributing the power supplied from the power supply A to the element section of the package, malfunction preventing sections E1, E2, E3 and OR gates for controlling this operation. F1, F2, F3
Is provided. If, for example, the packages B1, B2, B3 are operating in this state, one of the
It is assumed that a failure occurs in each package B1. In this case, the fault detection unit C1 inputs a low level signal to the malfunction prevention unit E1. As a result, the output signal of the malfunction prevention unit E1 becomes low level and is input to the power supply switching unit D1 through the OR gate F1. After that, when the operator inserts or removes the package B1, the power control switch S
When W1 is turned off, it becomes low level and OR gate F1
The signals input to the two terminals are all at low level, the input of the power source switching unit D1 is at low level, and the power source switching unit D1 cuts off the power supply of the power source A. During this period, the operator performs the process of removing the package B1 from the device.

For example, if a failure occurs in the package B1 and the operator mistakenly turns off the power control switch SW2, the OR gate F2 has a low level of the switch SW2 at one terminal and a malfunction prevention unit at the other end. E2
The high level of is input. (Since no fault has occurred in the package B2, the malfunction prevention unit E2 receives the high level from the fault detection unit C2.) As a result, the output of the OR gate F2 remains at the high level and the power supply switching unit D2 The power supply of the power supply A is continued.

As described above, when the package is operating normally, the package can continue operating even if the power control switch is operated by mistake. The power supply was cut off and it was possible to insert and remove.

[0007]

The first problem is that in the prior art, the operator selects the power supply control SW2 and operates it in order to insert and remove the package B2 shown in FIG. 2, for example. Even if you press the power control switch other than the package, the normal package continues to operate,
When the number of packages becomes large, it is necessary to take a complicated operation process until the target package is switched off. The reason is that the power control switch must be attached to each package, and the normal package must continue to operate normally even if a power control switch other than the target package is pressed.

The second problem is that the conventional technique is costly. The reason is that the power supply control switch is required for each individual package.

In order to solve the above-mentioned problems, the present invention unifies the power control switch and operates one power control switch so that power can be cut off only for the target package in which a failure has occurred. The purpose is to improve the operability in hot-swap work, and it is also possible to reduce the cost by reducing the number of control switches.

[0010]

SUMMARY OF THE INVENTION A hot-swap device according to the present invention supplies a power source for supplying power to a plurality of packages, and an alarm signal which is provided corresponding to each of the packages and detects a failure. A plurality of fault detection units, a hot-swap unit for outputting a live signal to all packages other than the package that generated this alarm signal when the alarm signal is input, and an ON signal during normal operation, A power supply control switch for outputting an off signal when performing hot plugging and unplugging, and an active signal is output when the live signal is input to each package mounted on the package and when the live signal is not input. Are provided in each of the package and a plurality of malfunction prevention circuits that enable the signal of the power control switch to control ON / OFF. Constructed and a power switching unit for supplying power to each element on a substrate that is mounted from the power supply to the package when controlling the on-off.

[Operation] This will be described with reference to the block diagram of the hot-swap device of the present invention shown in FIG. Multiple packages P1, P
If, for example, P1 out of 2, P3 fails,
The live signal is output to the packages other than the package P1 in which the fault is detected by the fault detector 11 and the fault is detected by the hot-swap controller. In this state, the malfunction prevention circuit
In the package P1 to which the live signal is input, the power supply cutoff signal from the power supply control switch does not operate the power supply switching unit and the power supply is not cut off.
On the other hand, in the packages other than P1 to which the live signal is not input, the power-off signal from the power control switch becomes valid, and the power switching unit is operated to stop the power supply. As described above, the power supply is shut off only to the package in which a failure has occurred due to one power control switch, and the operator can reliably perform hot-plugging / unplugging with a single switch operation regardless of which package has a failure. Become.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. The hot-swap device of the present invention includes a power supply 1, a hot-swap control unit 2, a power supply control switch 3, fault detection units 11 to 13, and packages P1 to P3. Each of the packages P1 to P3 is equipped with a board element group 41 to 43, together with malfunction prevention sections 21 to 23 and power supply switching sections 31 to 33.

The operation of the embodiment shown in FIG. 1 will be described in detail below.

The power source 1 is adapted to supply power to the board element groups 41 to 43 and the malfunction preventing sections 21 to 23 via the power source switching sections 31 to 33 mounted on the packages P1 to P3, respectively.

FIG. 3 shows an operation time chart of the present invention.

First, at time t1 in the time chart of FIG. 3, the information processing apparatus is operating normally. In this case, the power supply control switch 3 shown in FIG. 1 outputs an ON signal as the signal S, that is, a low level here, and the malfunction prevention units 21 to 21.
23 outputs an active signal, that is, a high level here to the signals C1 to C3, and the power supply switching units 31 to 31.
33 causes the power of the power source 1 to be transferred to the packages P1 to P
It is supplied to the substrate element units 41 to 43 in the No. 3. At this time, the packages P1 to P3 are operating normally, so that the failure detection units 11 to 13 do not output the alarm signals to the signals a1 to a3. Here, the hot-swap controller 2 receives the alarm signals at the low level and outputs the signals. The live signal is not output to b1 to b3, and is low level here.

Further, at time t2 in the time chart, the power control switch 3 is turned on by the signal S during the normal operation of the device.
Indicates when the off signal is input. As at time t1, the packages P1 to P3 are operating normally, and the failure detection unit 1
1 to 13 do not output an alarm signal to the signals a1 to a3. Also, the hot-swap controller 2 does not output live signals to the signals b1 to b3. The power control switch 3 receives the signal S
When a high level is output here, the malfunction prevention units 21 to 23 determine that the signal S is valid based on the signals b1 to b3 of the hot-swap controller 2 and the signal S of the power control switch 3, and the signals C1 to C1 are valid. No active signal is output to C3. That is, it is at a low level here.

The power supply switching units 31 to 33 are connected to the signals C1 to C.
Since the active signal of No. 3 is released, the supply of the electric power of the power supply 1 to the board element units 41 to 43 in the packages P1 to P3 is stopped. Here, the packages P1 to P3 can be inserted and removed. Power control switch 3 in this state
Outputs an ON signal to the signal S, here a low level is output,
Since no live signal is input to the signals b1 to b3 from the hot-swap controller 2 on the input side of one end of the malfunction prevention units 21 to 23, the signal S at the other end of the malfunction prevention units 21 to 23 remains. The ON signal is validated and an active signal is output to the signals C1 to C3, and the power supply switching units 31 to 33 again supply the power supply 1 of the power supply 1 to the substrate element groups 41 to 43.

Here, a case where a failure occurs in the package P1 and the package P1 is hot-swapped will be specifically described. Time t3 on the time chart
Indicates a change in output signal of each unit after a failure occurs in the package P1 during normal operation of the information processing apparatus. First, when a failure occurs in the package P1, the failure detection unit 11 detects the failure and outputs an alarm signal as the signal a1. In response to this, the hot-swap controller 2 outputs live signals as the signals b2 and b3 to all the packages P2 and P3 other than the package P1. Packages P2 and P that received live signals
The malfunction prevention units 22 and 23 of FIG.
3, the active signal is continuously output to the signals C2 and C3. Power supply switching unit 3 receiving an active signal
2 and 33 continue to supply electric power from the power source 1 to the substrate element parts 42 and 43 in the packages P2 and P3. Whether the live signal is input to the signal b1 from the hot-swap controller 2 in the malfunction prevention unit 21 of the package P1 or the active signal is still output as the signal C1 from the malfunction prevention unit 21 to the power supply switching unit 31. Has become.

The procedure for hot plugging and unplugging the package P1 is shown in FIG.
At time t4. To perform hot plugging and unplugging, the operator first operates the power supply control switch 3. The signal S changes from an on signal to an off signal. Since the hot-swap controller 2 does not output a live signal to the signal b1 to the package P1 in the malfunction prevention unit 21 of the package P1, the malfunction prevention unit 21 outputs the signal S of the power supply control switch 3 as an off signal. The active signal of the output signal c1 of 21 is released. Here, the supply of the power of the power supply 1 to the substrate element group 41 in the package P1 is stopped in the power supply switching unit 31 which has become the low level and receives the low level. Package P here
2 and P3 are the malfunction preventing section 2 because the signals b2 and b3 of the hot-swap controller 2 are high level live signals.
The power supply switching units 32 and 33 continue to supply power while the active signals 2 and 23 output the active signals to the signals C2 and C3. Here, the operator removes the package P1 in which the failure has occurred and inserts the normal package P1.

Next, at time t5 in the time chart of FIG. 3, the operator operates the power supply control switch 3 after the insertion / removal to change the signal S from the OFF signal to the ON signal, and shows the change of each part. First, the malfunction prevention unit 21 in the package P1
Outputs an active signal to the signal C1 because the signal S of the switch 3 has turned on, and the power supply switching unit 31
Will supply power from the power supply 1 to the substrate element group 41 in the package P1. The failure detection unit 11 is package P
Since 1 has become normal, the alarm signal of signal a1 is released. In response to this, the hot-swap controller 2 releases the live signals of the signals b2 and b3 to the packages P2 and P3,
All are in the state of time t1 of normal operation.

Further, in the present embodiment, by making the power source 1 an uninterruptible power source, it becomes possible to provide a general hot-swap device of an applied example.

[0024]

The hot-swap system of the present invention is provided with the hot-swap controller, so that when a failure occurs in a package, all the packages in which no failure has occurred in response to the alarm signal from the failure detection section. By sending a live signal to the malfunction prevention unit, power can be cut off by the power supply control switch only for the package with the failure, that is, power can be cut off only for the package with the failure with one power supply control switch. Therefore, the power control switch can be unified.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram of a hot-swap device according to a conventional technique.

FIG. 3 is a time chart of an embodiment of the present invention.

[Explanation of symbols]

 1 Power Supply 2 Hot Swap Control Section 3 Power Control Switch 11-13 Fault Detection Section 21-23 Malfunction Prevention Section 31-33 Power Supply Switching Section 41-43 Board Element Group a1-a3 Fault Detection Section Output Signal b1-b3 Hot Swap Control section output signal c1 to c3 Malfunction prevention section output signal S Power control switch output signal

Claims (2)

[Claims] 1. A power supply for supplying power to a plurality of packages, a plurality of fault detection units provided corresponding to each of the packages and outputting an alarm signal when a fault is detected, and the alarm signal being input. And a hot-swap controller that outputs a live signal to all packages other than the one that generated the alarm signal, and an on-signal that is generated during normal operation and an off-signal that is output when hot-swap is performed. A power control switch and a plurality of switches mounted on the package, which output an active signal when the live signal is input, and control ON / OFF by validating the signal of the power control switch when the live signal is not input. Of the malfunction prevention unit and the power supply installed in each of the packages to control the on / off. Live insertion apparatus characterized by comprising a power supply switching unit for supplying power to each element on a substrate mounted on the package. 2. The hot-swap device according to claim 1, wherein the power source is an uninterruptible power source.