Control apparatus for controlling plural process executing apparatuses

A control method executed in a control apparatus which controls a plurality of process executing apparatuses, the method comprising:

• transmitting, to each of the process executing apparatuses, a first signal which instructs the process executing apparatuses to execute predetermined processing common to the process executing apparatuses;
• transmitting, to each of the process executing apparatuses, a second signal which instructs the process executing apparatuses to change to an energy saving mode;
• transmitting, to each of the process executing apparatuses, a third signal which instructs the process executing apparatuses to change to a normal mode;
• and
• performing control processing to control transmission of the first signal, the second signal, and the third signal to each of the process executing apparatuses such that:
• (i) the first signal is transmitted to a first process executing apparatus among the plurality of process executing apparatuses to instruct the first process executing apparatus to execute the predetermined processing, and the second signal is transmitted to all process executing apparatuses among the plurality of process executing apparatuses other than the first process executing apparatus, such that all of the process executing apparatuses other than the first process executing apparatus are in the energy saving mode while the first process executing apparatus executes the predetermined processing, and
• (ii) after the first process executing apparatus completes execution of the predetermined processing, the second signal is transmitted to the first process executing apparatus to instruct the first process executing apparatus to change to the energy saving mode, and the third signal and the first signal are transmitted to a second process executing apparatus which is among the process executing apparatuses and which is in the energy saving mode, to instruct the second process executing apparatus to change to the normal mode and to execute the predetermined processing, such that all of the process executing apparatuses other than the second process executing apparatus are in the energy saving mode while the second process executing apparatus executes the predetermined processing,
• whereby the control processing is performed such that one of the process executing apparatuses executes the predetermined processing while a remainder of the process executing apparatuses, other than the process executing apparatus which is executing the predetermined processing, are in the energy saving mode and such that all of the process executing apparatuses execute the predetermined processing in sequence.

A control system to control a plurality of process executing apparatuses with a control apparatus, the system comprising:

• the control apparatus;
• and
• the process executing apparatuses,
• wherein:
• the control apparatus includes:
• a first processor which transmits, to each of the process executing apparatuses, a first signal which instructs the process executing apparatuses to execute predetermined processing common to the process executing apparatuses, a second signal which instructs the process executing apparatuses to change to an energy saving mode, and a third signal which instructs the process executing apparatuses to change to a normal mode,
• wherein the first processor performs control of transmission of the first signal, the second signal, and the third signal to each of the process executing apparatuses such that:
• (i) the first processor transmits the first signal to a first process executing apparatus among the plurality of process executing apparatuses to instruct the first process executing apparatus to execute the predetermined processing, and transmits the second signal to all process executing apparatuses among the plurality of process executing apparatuses other than the first process executing apparatus, such that all of the process executing apparatuses other than the first process executing apparatus are in the energy saving mode while the first process executing apparatus executes the predetermined processing, and
• (ii) after the first process executing apparatus completes execution of the predetermined processing, the first processor transmits the second signal to the first process executing apparatus to instruct the first process executing apparatus to change to the energy saving mode, and transmits the third signal and the first signal to a second process executing apparatus which is among the process executing apparatuses and which is in the energy saving mode, to instruct the second process executing apparatus to change to the normal mode and to execute the predetermined processing, such that all of the process executing apparatuses other than the second process executing apparatus are in the energy saving mode while the second process executing apparatus executes the predetermined processing,
• whereby the first processor performs control of the transmission of the first signal, the second signal, and third signal such that one of the process executing apparatuses executes the predetermined processing while a remainder of the process executing apparatuses, other than the process executing apparatus which is executing the predetermined processing, are in the energy saving mode, and such that all of the process executing apparatuses execute the predetermined processing in sequence,
• wherein the first processor controls the control apparatus to change from a normal mode to an energy saving mode after transmitting the first signal;
• and
• each of the process executing apparatuses includes:
• a second processor which executes the predetermined processing in response to reception, from the control apparatus, of the first signal,
• wherein, in response to completion of the predetermined processing, the second processor transmits, to the control apparatus, a fourth signal which instructs the control apparatus to change from the energy saving mode to which the control apparatus had changed after having transmitted the first signal, to the normal mode.

A control system to control a plurality of process executing apparatuses with a control apparatus, the system comprising:

• the control apparatus;
• and
• the process executing apparatuses, each of the plurality of process executing apparatuses comprising a processor,
• wherein:
• the control apparatus transmits, to the processor of each of the plurality of process executing apparatuses, a first signal which instructs the processor to execute predetermined processing, a second signal which instructs the processor to change from a normal mode to an energy saving mode, and a third signal which instructs the processor to change from the energy saving mode to the normal mode;
• the control apparatus performs control of transmission of the first signal and the second signal such that the first signal is transmitted to a first process executing apparatus among the plurality of process executing apparatuses, and such that the second signal is transmitted to a remainder of the process executing apparatuses other than the first process executing apparatus;
• after transmission of the first signal and the second signal and during execution of the predetermined processing by the first process executing apparatus, the control apparatus changes to an energy saving mode;
• in response to reception of the first signal from the control apparatus, the processor of the first process executing apparatus executes the predetermined processing;
• in response to reception of the second signal from the control apparatus, the processor of a remainder of the process executing apparatuses other than the first process executing apparatus controls the remainder of the process executing apparatuses other than the first process executing apparatus to change to the energy saving mode, respectively;
• in response to the completion of the predetermined processing, the processor of the first process executing apparatus transmits, to the control apparatus, a fourth signal which instructs the control apparatus to change from the energy saving mode to a normal mode;
• in response to reception of the fourth signal from the processor of the first process executing apparatus, the control apparatus changes to the normal mode;
• the control apparatus having changed to the normal mode performs control of transmission of the first signal, the second signal, and the third signal, such that the second signal is transmitted to the processor of the first process executing apparatus, and such that the third signal and the first signal are transmitted to a second process executing apparatus which is among the plurality of process executing apparatuses and which is in the energy saving mode;
• in response to reception of the third signal and first signal from the control apparatus, the processor of the second process executing apparatus executes the predetermined processing and controls the second process executing apparatus to change from the energy saving mode to the normal mode;
• and
• in response to reception of the second signal from the control apparatus, the processor of the first process executing apparatus controls the first process executing apparatus to change to the energy saving mode, whereby a remainder of the process executing apparatuses other than the second process executing apparatus are in the energy saving mode.

A control method executed in a control system comprising a control apparatus and a plurality of process executing apparatuses controlled by the control apparatus, each of the plurality of process executing apparatuses comprising a processor, the method comprising:

• transmitting, by the control apparatus, to the processor of each of the plurality of process executing apparatuses, a first signal which instructs the processor to execute predetermined processing, a second signal which instructs the processor to change from a normal mode to an energy saving mode, and a third signal which instructs the processor to change from the energy saving mode to the normal mode;
• performing, by the control apparatus, control of transmission of the first signal and the second signal such that the first signal is transmitted to a first process executing apparatus among the plurality of process executing apparatuses, and such that the second signal is transmitted to a remainder of the process executing apparatuses other than the first process executing apparatus;
• after transmission of the first signal and the second signal and during execution of the predetermined processing by the first process executing apparatus, changing the control apparatus to an energy saving mode;
• in response to reception of the first signal from the control apparatus, executing, by the processor of the first process executing apparatus, the predetermined processing;
• in response to reception of the second signal from the control apparatus, controlling, by the processor of a remainder of the process executing apparatuses other than the first process executing apparatus, the remainder of the process executing apparatuses other than the first process executing apparatus to change to the energy saving mode, respectively;
• in response to the completion of the predetermined processing, transmitting, by the processor of the first process executing apparatus, to the control apparatus, a fourth signal which instructs the control apparatus to change from the energy saving mode to a normal mode;
• in response to reception of the fourth signal from the processor of the first process executing apparatus, changing the control apparatus to the normal mode;
• performing, by the control apparatus having changed to the normal mode, control of transmission of the first signal, the second signal, and the third signal, such that the second signal is transmitted to the processor of the first process executing apparatus, and such that the third signal and the first signal are transmitted to a second process executing apparatus which is among the plurality of process executing apparatuses and which is in the energy saving mode;
• in response to reception of the third signal and first signal from the control apparatus, executing, by the processor of the second process executing apparatus the predetermined processing, and controlling, by the processor of the second process executing apparatus, the second process executing apparatus to change from the energy saving mode to the normal mode;
• and
• in response to reception of the second signal from the control apparatus, controlling, by the processor of the first process executing apparatus, the first process executing apparatus to change to the energy saving mode, whereby a remainder of the process executing apparatuses other than the second process executing apparatus are in the energy saving mode.