JPS6410788B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes a power-on (HOLD) signal sent from a system power control device having a plurality of interfaces for controlling the unit power control device, and uses the signal to control the system power control device. Internal or external power on indication (ONI) signal, power on completion (COMP) signal or power alarm (ALM)
It is sent from the system power control device to the unit power control device by converting it into a signal and returning the converted signal to the system power control device.
This system is characterized by automatically checking the operation of the HOLD signal sending circuit and the ONI signal, COMP signal, and ALM signal circuit sent from the unit power supply control device to the system power supply control device.

The system power control device performs power-on control to suppress inrush current at the time of startup of the unit power control device, and monitors the status of the unit power control device. To take an example of a computer system, a unit power supply control device is used to perform power on/off control and power supply alarm monitoring control for a power supply unit that supplies power to loads such as the central processing unit (CPU) or storage device (MEM). It is something.

The present invention will be explained in detail below with reference to the drawings.

Figure 1 is a diagram showing the power on/off sequence;
FIG. 2 shows a conventional power supply control system, and FIGS. 3 to 5 show power supply control systems according to embodiments of the present invention.

In the figure, U00, U01...UN is the unit power control device, SPC is the system power control device,
ADP, ADP00, ADP01 are additional devices, UA0
0FF, UA01FF is unit power control device U0
Flip-flop compatible with 0, U01, RL0
0, RL01 is the unit power supply control device U00, U
The relay corresponds to 01, and r100 and r101 indicate its contacts. ONI, COMP, and ALM are multiplexers that collect power-on display signals ONI00 to ONI01, power-on completion signals COMP00 to COMP01, and power alarm signals ALM00 to ALM01. Also, HOLD00~HOLD0
1 is a power-on signal.

As shown in FIG. 1, the power on/off sequence for each unit power control device is such that all unit power control devices are not turned on and off at the same time; for example, power is turned on only when the unit power control device U00→ The power is turned off in the order of U01→...UN, and in the reverse order UN...→U01→U0
This is done in the order of 0.

Now, in FIG. 2, during the power-on sequence, the control circuit of the system power control device SPC selects the unit address selection circuit from the unit power control device U00.
When the address is specified and a closing instruction is issued from the closing instruction circuit, flip-flop UA00FF is set.
When relay RL00 operates, contact r10
0 to the unit power supply control device U00.
Send HOLD signal. Similarly, U01, U02,
...The UN is instructed to invest.

During the power-off sequence, the control circuit of the system power supply control device specifies an address to the unit address selection circuit, and when the disconnection instruction circuit issues a disconnection instruction, the flip-flop UA00FF is reset.
The HOLD signal is turned off.

On the other hand, when the unit power control device receives the HOLD signal, it turns on the power to the load, and also sends the power-on display signal ONI and the power-on completion signal COMP.
Alternatively, if there is an abnormality, a power supply alarm signal ALM etc. is sent back to the system power supply control unit SPC. The system power control unit SPC receives these signals to control internal system power control unit (e.g.
You can check the operation of the HOLD signal sending circuit) or the unit power supply control device.

However, in this conventional method, the system power control device SPC and each unit power control device U00 to U
Diagnosis cannot be performed unless 01 is connected, and even if a malfunction is detected, it cannot be easily determined whether it is a failure on the system power control device side or on the unit power control device side. Ta.

The present invention provides a method in which a system power control device can be diagnosed in the same manner as before without connecting a unit power control device.By this, for example, only the system power control device can be diagnosed in advance at a manufacturing factory or the like. If the diagnosed system power control device and unit power control device are connected in the field (customer side), the second
Diagnosis can be performed in the same conventional manner as shown in the figure, and it can also be easily determined whether the fault is on the system power control device side or the unit power control device side.

FIG. 3 shows the first embodiment of the present invention, in which external additional devices ADP00 and ADP01 of the system power supply control device are shown.
This is the circuit that returns the HOLD signal. Generally, the system power control device and the unit power control device interface are connected by a connector, and the external circuits ADP00 and ADP01 can all be replaced with connectors. When the connector is connected, when the power-on signal HOLD is sent from the system power control unit SPC, it is converted into the power-on display signal ONI, the power-on completion signal COMP, and the alarm signal ALM.
It is returned to the control circuit through a contact receiver circuit and a multiplexer circuit. By checking the presence or absence of this signal, the control circuit can determine whether the circuit is operating normally. Incidentally, the circuit configuration and operation of the system power supply control device SPC itself are exactly the same as those shown in FIG. 2.

In the example shown in FIG. 3, each power-on signal is converted into a power-on display signal, a power-on completion signal, and a power alarm signal in each external additional device ADP00, ADP01, but the embodiment shown in FIG. Turn-on signal HOLD00 is each power-on display signal ONI0
0 to ONI01, power-on signal HOLD01 is each power-on completion signal COMP00-COMP01, and power-on signal HOLD02 (not shown) is an additional device to each power alarm signal ALM00 to ALM01.
This is an example of conversion using ADP.

In this case as well, the circuit and operation of the system power supply control device SPC are exactly the same as in the case of FIG. 2, as in FIG.

In the embodiment of FIG. 4, the system power control device
The power-on display signal receiving section, power-on completion signal receiving section, and power supply alarm signal receiving section of the SPC can be diagnosed completely independently in terms of time.

FIG. 5 shows an embodiment in which the power-on signal HOLD is converted into a power-on display signal ONI, a power-on completion signal COMP, and a power alarm signal ALM within the system power control device SPC.

The system power control device SPC has an interface switching unit (gates GT, G00, G0 group, G01,
Two circuits consisting of the G1 group) are newly installed, and the interface is switched by the test instruction signal TEST. That is, flip-flop UA00FF or UA
When 01FF is set, normally gate G00 or G01 is turned on, relay RL00 or relay RL01 is operated, and a power-on signal HOLD is sent to unit power supply control device U00 or U01.

On the other hand, during diagnosis, the gate GT is operated by the test instruction signal TEST, and the gates G00 and G01 are turned off. In addition, the test instruction signal TEST turns on gate groups G0 and G1, and the flip-flop
A signal (power-on signal) from UA00FF or UA01FF is pseudo-converted into a power-on display signal ONI, a power-on completion signal COMP, and a power alarm signal ALM.

As described above, in the present invention, by converting the power-on signal using an internal or external additional device of the system power supply control device, diagnosis can be performed without connecting the unit power supply control device as in the conventional case.

The control circuit is generally composed of a microcomputer or a logic circuit, and by connecting this control interface to a communication line, remote maintenance is easily possible.

[Brief explanation of the drawing]

Figures 1 and 2 show the conventional power supply control system,
5 to 5 show power supply control systems that are embodiments of the present invention. In the figure, U00, U01...UN is the unit power control device, SPC is the system power control device,
ADP, ADP00, ADP01 are additional devices, UA0
0FF, UA01FF is unit power control device U0
Flip-flop compatible with 0, U01, RL0
0, RL01 is the unit power supply control device U00, U
The relay corresponds to 01, and r100 and r101 indicate its contacts. ONI, COMP, and ALM are multiplexers that collect power-on display signals ONI00 to ONI01, power-on completion signals COMP00 to COMP01, and power alarm signals ALM00 to ALM01. Also HOLD00~HOLD01
is the power-on signal.

Claims (1)

[Claims] 1 A system power supply control device having a plurality of interfaces for connecting a plurality of unit power supply control devices, and the system power supply control device sequentially sends a power-on signal to the interface, and also transmits a power-on signal to the interface. Receives some or all of the power-on indication signal indicating that the power has been turned on via the power source, the power-on completion signal indicating that the power has been turned on, and the power alarm signal indicating that an abnormal condition has occurred from multiple unit power supplies. In a system power control device configured to perform a diagnosis of the system power control device, the power-on signal from the system power control device is turned on within the system power control device or by an external additional device of the system power control device. A power supply control method characterized by converting all or part of a display signal, a power-on completion signal, and a power supply alarm signal.