JPH02178719A - Power control system - Google Patents

Abstract

PURPOSE:To shorten a time required for completing the disconnection of a power source completes through a system by permitting a power controller to transmit collective power source disconnection commands with respect to plural power sources to all the power sources. CONSTITUTION:In a power source system where one power controller and plural power sources are connected through a serial bus, a means generating the collective power source disconnection commands for collectively disconnecting plural power sources is installed in the power controller. Namely, 'ACK' commands are not transmitted from the power sources with respect to the command from the power controller. The power controller does not expect the 'ACK' commands from the power sources, but expects only power source disconnection completion commands. The power controller recognizes the completion of power source disconnection when it has received the power source disconnection completion commands from all the power sources. Thus, the time required for completing power source disconnection through the system can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply control method, and particularly to a power supply control method using a serial bus.

[Prior Art] Conventionally, in this type of power supply control system, a plurality of power supplies are cut off in the following manner.

That is, the power supply control device includes an identification number (hereinafter referred to as ID) uniquely set for each power supply in advance in a power-off command, and transmits the command to the plurality of power supplies via the serial bus. A power source that matches the ID included in the power-off command sends an "ACK" command to the power control device via the serial bus, indicating that it has received the power-off command. When the power supply control unit receives the "ACK" command, it transmits the ID followed by the above ID in a power-off command, and waits until it receives the "ACK" command from the corresponding power supply. Upon receiving the "ACK" command, the power control device sends a power off command including the following ID. The power supply control device controls these operations.
Repeat until the power-off command is sent to all power supplies.

Thereafter, the power supply control device receives a power-off completion command from the power source and confirms the completion of power-off.

If there is a power supply for which a power-off completion command is not sent after a certain period of time, the power supply control device determines that a power failure has occurred, and sends an error log request command to that power supply. If the power supply does not respond to this command, it is assumed that there is a communication error and the power supply is disconnected from the power supply control target. The power supply control device sends this information to the SVP (service processor), which is a higher-level device.

[Problems to be Solved by the Invention] The conventional power supply control method described above sends a power cut command including individual IDs to multiple power supplies, and receives an "ACK" from the power supply for which the corresponding ID is set. Since the operation of transmitting the next power-off command after receiving a command is repeated, the system has the disadvantage that it takes a long time to complete the power-off.

[Means for Solving the Problems] A power supply control method according to the present invention provides a power supply system in which one power supply control device and a plurality of power supplies are connected via a serial bus, in which the power supply control device is connected to the plurality of power supplies. The present invention is characterized in that it has means for generating a collective power-off command for cutting off the power of the machines all at once.

[Operation] In the power supply control method of the present invention, the power supply control device sends a collective power-off command to all the power supplies. - The collective power-off command is a command that affects all power supplies without including individual QIDs, and the power supply does not send an "ACK" command in response to this command from the power supply control device. The power supply control device does not expect an "ACK" command from the power supply, but only a power-off completion command.

When receiving power-off completion commands from all power sources, the power supply control device recognizes that power-off has been completed. If there is a power supply that does not send a power-off completion command, the same processing as in the conventional power supply control method is performed.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a communication procedure diagram for explaining a power supply control method according to an embodiment of the present invention.

In FIG. 1, power cutoff 1 is a power cutoff signal that the 5VP 9 transmits to the power supply control device 10. Power off 2 is performed when the power supply control device 10 disconnects power supply #1, power supply #2, and so on. power supply#
3. This is a batch power-off command sent to the power supply #n via the serial bus, and when the power supply control device 10 receives power-off l, it immediately sends power-off 2.

The disconnection completion commands 3 to 5 are No. Ia in which the power supply that received the power disconnection 2 sends fJ to the power supply control device 10 that the power supply has completed outputting the voltage. After transmitting the power supply disconnection 2, the power supply control device 10 waits for a command to complete disconnection from all power supplies for a certain period of time. The error log request 6 is a signal sent to the power supply that has not received the disconnection completion command after waiting for this certain period of time. The error data transmission 7 is a signal corresponding to the error log request 6, and includes the contents of the failure occurrence of the power supply.The failure occurrence report 8 is immediately sent to the 5VP9 by the power supply control device 10 that has received the error data transmission 7 from the power supply. This is a signal to be transmitted, and this causes 5VP9 to
Check for failure occurrence.

[Effects of the Invention] As explained above, the present invention provides a power control method for a power supply system in which one power supply control device and a plurality of power supplies are connected via a serial bus. By sending a batch power-off command to all [[, there is an effect that the time required to complete power-off as a system can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a communication procedure diagram for explaining a power supply control method according to an embodiment of the present invention. l... Power off, 2... Power off, 3... Disconnecting completed, 4... Disconnecting completed, 5... Disconnecting completed, 6... Error log request, 7... Error data transmission , 8... Failure occurrence report, 9... SVP, 10... Power supply control device, 11... Power supply #1.12... Power supply #2.13...
・Power supply #3.14...Power supply #n0

Claims (1)

[Claims] 1. In a power supply system in which one power supply control device and a plurality of power supplies are connected via a serial bus, the power supply control device issues a batch power-off command to cut off the plurality of power supplies at once. A power supply control method characterized by having means for generating.