ALARM SYSTEM AND ALARM DEVICE
First Claim
1. An alarm system, comprising:
- a master alarm device; and
at least one slave alarm device,the master alarm device and the at least one slave alarm device performing transmission and reception therebetween, wherein;
the master alarm device transmits a switching request signal to the at least one slave alarm device at a predetermined timing, the switching request signal containing at least an own address and an address of a slave alarm device that is to operate as the master alarm device next; and
upon reception of the switching request signal, the slave alarm device that is to operate as the master alarm device next judges whether or not switching is possible based on switching availability judgment information for judging whether or not the switching is possible between the slave alarm device and the master alarm device, and, when it is judged that the switching is possible, starts operating as the master alarm device.
1 Assignment
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Accused Products
Abstract
Provided are an alarm system and an alarm device which are capable of enhancing a fail-safe function. A fire alarm device (A) operating as a master unit transmits a switching request signal to fire alarm devices operating as slave units at a predetermined timing, the switching request signal containing at least an own address and an address of a fire alarm device (B) that is to operate as the master unit next (S20). Upon reception of the switching request signal, among the fire alarm devices operating as the slave units, the fire alarm device (B) that is to operate as the master unit next judges whether or not switching is possible based on switching availability judgment information for judging whether or not the switching to the master unit is possible (S30), and, when it is judged that the switching is possible, starts operating as the master unit (S31).
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Citations
12 Claims
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1. An alarm system, comprising:
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a master alarm device; and at least one slave alarm device, the master alarm device and the at least one slave alarm device performing transmission and reception therebetween, wherein; the master alarm device transmits a switching request signal to the at least one slave alarm device at a predetermined timing, the switching request signal containing at least an own address and an address of a slave alarm device that is to operate as the master alarm device next; and upon reception of the switching request signal, the slave alarm device that is to operate as the master alarm device next judges whether or not switching is possible based on switching availability judgment information for judging whether or not the switching is possible between the slave alarm device and the master alarm device, and, when it is judged that the switching is possible, starts operating as the master alarm device. - View Dependent Claims (4)
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2. An alarm system, comprising:
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a master alarm device; and at least one slave alarm device, the master alarm device and the at least one slave alarm device performing transmission and reception therebetween, wherein; the master alarm device transmits a switching request signal to the at least one slave alarm device at a predetermined timing, the switching request signal containing at least an own address and an address of a slave alarm device that is to operate as the master alarm device next; and upon reception of the switching request signal, the slave alarm device that is to operate as the master alarm device next judges whether or not switching is possible based on switching availability judgment information for judging whether or not the switching is possible between the slave alarm device and the master alarm device, and, when it is judged that the switching is impossible, transmits an abnormality signal to the master alarm device. - View Dependent Claims (3, 5, 6)
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7. An alarm device, comprising:
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a status detection section; a status judgment section for judging a status based on a signal output from the status detection section; a control section for causing an alarm to be output based on a result of the judging made by the status judgment section; a transmitting/receiving section for transmitting and receiving a status signal to and from another alarm device; and an operation setting section for performing setting as to whether the alarm device is to operate as a master alarm device or as a slave alarm device, wherein; when the alarm device operates as the master alarm device, the control section transmits a switching request signal to the another alarm device at a predetermined timing via the transmitting/receiving section, the switching request signal containing at least an own address and an address of a slave alarm device that is to operate as the master alarm device next; and when the alarm device operates as the slave alarm device, upon reception of the switching request signal, the control section judges whether or not switching is possible based on switching availability judgment information for judging whether or not the switching is possible between the slave alarm device and the master alarm device, and, when it is judged that the switching is possible, the operation setting section performs the setting so that the alarm device operates as the master alarm device. - View Dependent Claims (10)
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8. An alarm device, comprising:
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a status detection section; a status judgment section for judging a status based on a signal output from the status detection section; a control section for causing an alarm to be output based on a result of the judging made by the status judgment section; a transmitting/receiving section for transmitting and receiving a status signal to and from another alarm device; and an operation setting section for performing setting as to whether the alarm device is to operate as a master alarm device or as a slave alarm device, wherein; when the alarm device operates as the master alarm device, the control section transmits a switching request signal to the another alarm device at a predetermined timing via the transmitting/receiving section, the switching request signal containing at least an own address and an address of a slave alarm device that is to operate as the master alarm device next; and when the alarm device operates as the slave alarm device, upon reception of the switching request signal, the control section judges whether or not switching is possible based on switching availability judgment information for judging whether or not the switching is possible between the slave alarm device and the master alarm device, and, when it is judged that the switching is impossible, transmits an abnormality signal to the another alarm device via the transmitting/receiving section. - View Dependent Claims (9, 11, 12)
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Specification