CONTROL DEVICE AND COMPUTER-READABLE RECORDING MEDIUM HAVING STORED THEREIN CONTROL PROGRAM

• US 20170090543A1
• Filed: 09/14/2016
• Published: 03/30/2017
• Est. Priority Date: 09/24/2015
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: THIELO, OMAR HAME
• Granted Patent: US 10,372,186 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 1/3206 Monitoring of events, devices or parameters that trigger a change in power modality
• CPC Class Codes: G06F 1/3234 Power saving characterised by the action undertaken
• CPC Class Codes: G06F 13/4068 Electrical coupling
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

A control device includes a controller that controls a target device, and the controller includes a power supply controller, a detector, an obtainer, and a setting changer. The power supply controller shifts, when a port connected to another device via a cable comes into an unused state, a power supply mode to the target device and to the control device from a normal power supply mode into a power saving mode capable of receiving activation interruption. The obtainer obtains, when the detector detects the change in the mounting state of the cable, type information representing a type of the cable. The setting changer that changes setting of the cable in accordance with the type information obtained by the obtainer. This makes it possible to be surely restored to the normal power supply mode even when a cable is replaced with another type of cable in a power saving mode.

Claims

1. A control device comprising a controller that controls a target device, the controller comprising:

a power supply controller that shifts, when a port connected to another device via a cable comes into an unused state, a power supply state to the target device and to the control device from a normal power supply mode into a power saving mode capable of receiving activation interruption;

a detector that detects a change in a mounting state of the cable in the power-saving mode;

an obtainer that obtains, when the detector detects the change in the mounting state of the cable, type information representing a type of the cable; and

a setting changer that changes setting of the cable in accordance with the type information obtained by the obtainer.

2. The control device according to claim 1, wherein

when the activation interruption is received in the power-saving mode, the power supply controller shifts the power supply state from the power saving mode to the normal power supply mode.

3. The control device according to claim 1, wherein

when the setting of the cable before changing by the setting changer is the same as setting after the changing, the setting changer omits operation to change the setting of the cable.

4. The control device according to claim 1, wherein the obtainer obtains the type information by reading the type information from a register attached to the cable.

5. The control device according to claim 1, wherein

the power saving mode is a first power saving mode that stops power supply to the target device and to elements except for an activation interruption receiver included in the control device;

and

in the first power saving mode,

the power supply controller temporarily supplies power to the controller at a predetermined timing,

the obtainer obtains, when the detector detects the change in the mounting state of the cable, the type information representing the type of the cable, and

the setting changer changes the setting of the cable in accordance with the type information obtained by the obtainer.

6. The control device according to claim 5, wherein

when the detector detects no change in the mounting state of the cable or when the setting changer completes changing of the setting, the power supply controller finishes temporal supplying of power to the controller.

7. The control device according to claim 1, wherein

the power saving mode is a second power saving mode that stops power supply to the target device and to elements except for the detector and an activation interruption receiver included in the control device;

and

in the second power saving mode,

the power supply controller temporarily supplies, when the detector detects reception of mounting interruption of the cable as the change in the mounting state of the cable, power to the controller,

the obtainer obtains the type information representing the type of the cable, and

the setting changer that changes the setting of the cable in accordance with the type information obtained by the obtainer.

8. The control device according to claim 7, wherein

when the setting changer completes changing of the setting, the power supply controller finishes temporal supplying of power to the controller.

9. A non-transitory computer-readable recording medium having a stored therein a control program that causes a computer that functions as a controller for a target device to execute a process comprising:

shifting, when a port connected to another device via a cable comes into an unused state, a power supply state to the target device and to the control device from a normal power supply mode into a power saving mode capable of receiving activation interruption;

detecting a change in a mounting state of the cable in the power-saving mode;

obtaining, when detecting the change in the mounting state of the cable, type information representing a type of the cable; and

changing setting of the cable in accordance with the type information obtained in the obtaining.

10. The non-transitory computer-readable recording medium according to claim 9, wherein the process further comprises:

when the activation interruption is received in the power-saving mode, shifting the power supply state from the power saving mode to the normal power supply mode.

11. The non-transitory computer-readable recording medium according to claim 9, wherein the process further comprising:

when the setting of the cable before the changing is the same as setting after the changing, omitting the changing of the setting of the cable.

12. The non-transitory computer-readable recording medium according to claim 9, wherein the process further comprises:

obtaining the type information by reading the type information from a register attached to the cable.

13. The non-transitory computer-readable recording medium according to claim 9, wherein:

the power saving mode is a first power saving mode that stops power supply to the target device and to elements except for an activation interruption receiver included in the control device; and

the process further comprises;

in the first power saving mode,

temporarily supplying power to the controller at a predetermined timing,

obtaining, when detecting the change in the mounting state of the cable, the type information representing the type of the cable, and

changing the setting of the cable in accordance with the type information obtained in the obtaining.

14. The non-transitory computer-readable recording medium according to claim 13, wherein the process further comprises:

when detecting no change in the mounting state of the cable or when completing the changing of the setting, finishing the temporarily supplying of power to the controller.

15. The non-transitory computer-readable recording medium according to claim 9, wherein:

the power saving mode is a second power saving mode that stops power supply to the target device and to elements except for the detector and an activation interruption receiver included in the control device; and

the process further comprises;

in the second power saving mode,

temporarily supplying, when detecting reception of mounting interruption of the cable as the change in the mounting state of the cable, power to the controller,

obtaining the type information representing the type of the cable, and

changing the setting of the cable in accordance with the type information obtained in the obtaining.

16. The non-transitory computer-readable recording medium according to claim 15, wherein:

when completing the changing of the setting, finishing the temporarily supplying of power to the controller.