JP4348161B2 - Fire receiver - Google Patents

Description

  The present invention relates to a fire receiver that performs various processes by a CPU.

In a disaster prevention device such as a fire receiver, there is a disaster prevention device that detects a CPU runaway with a watchdog timer and performs a reset operation with the detection signal. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 2-60000 (page 3, FIG. 1)

  In the disaster prevention device described in Patent Document 1, the CPU is detected by the watchdog timer, and the reset is performed when the abnormality is detected. Therefore, the reliability is improved.

  However, in a fire receiver that uses multiple CPUs to improve processing efficiency, if any CPU becomes abnormal due to noise from outside or problems in the circuit, the cause of the abnormality is specified. It is difficult to do this, and when a fire is displayed, the display of the location of the fire is maintained even when an abnormality occurs in the CPU. The machine restart method may be different, and the burden on the operator tends to increase.

  In addition, if any of the CPUs is abnormal and the CPU is stopped, it is an unwarned state in which it is impossible to monitor the fire, so restart the fire receiver as soon as possible. It is necessary to return to the normal monitoring state, but it stays in the stopped state unless the operator operates it.

  In addition, when the display of the location of the fire cannot be maintained, the fire receiver may not be able to restart automatically, resulting in a lack of reliability.

  An object of the present invention is to provide a fire receiver that includes a plurality of CPUs and that can perform appropriate measures when any of the plurality of CPUs becomes abnormal in a fire receiver that performs predetermined processing by the plurality of CPUs. The purpose is to do.

In order to solve the above problems, the invention described in claim 1
In a fire receiver comprising a plurality of CPUs and a display unit for displaying various information, performing predetermined processing by the plurality of CPUs and controlling the display unit by a main CPU of the plurality of CPUs ,
When any one of the CPUs other than the main CPU becomes abnormal, a display holding mode for holding the abnormal display screen displayed on the display unit as it is, and the fire receiver automatically It is configured to select in advance which one of the automatic restart modes to restart corresponds to.

According to the first aspect of the present invention, when an abnormality occurs in any one of the CPUs of the fire receiver other than the main CPU, is it handled by either the display holding mode or the automatic restart mode? Can be selected in advance, so that appropriate measures can be taken in accordance with the abnormal content of the CPU, and the burden on the operator can be reduced.

According to a second aspect of the invention, when one of the CPU other than the main CPU of the plurality of CPU is abnormal, when the still display of the display unit is a state that can not be retained, it is selected The fire receiver automatically restarts regardless of the mode.

  According to the second aspect of the present invention, when the display on the display unit cannot be maintained, the fire receiver is automatically restarted regardless of the selected mode, so that the reliability is increased.

  According to the present invention, when an abnormality occurs in the CPU of the fire receiver, it can be dealt with by either the display holding mode or the automatic restart mode. In addition, the burden on the operator can be reduced, and when the display on the display unit cannot be maintained, the system is automatically restarted regardless of the mode, thereby increasing the reliability.

  By selecting in advance either the display hold mode or the automatic restart mode for the purpose of taking appropriate measures when any of the multiple CPUs of the fire receiver becomes abnormal It was realized.

  The configuration of the fire receiver 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing the front of the fire receiver 1, and FIG. 2 is a diagram showing the configuration of the fire receiver 1.

  The fire receiver 1 displays various information such as fires and abnormalities, a liquid crystal display (LCD) 2 composed of a touch panel type switch, and a district indicator lamp 3 for displaying a district where the fire has occurred. There are provided an indicator lamp 4 composed of LEDs, a switch 5 for performing various operations, an acoustic device 6 composed of a speaker that emits an alarm sound, and a printing device 7 composed of a printer.

  Inside the fire receiver 1, a main CPU board 10 provided with a main CPU 11, ROM 12, RAM 13, a mode setting switch 14, a CPU reset switch 15, an operation part CPU board 20 provided with an operation part CPU 21, ROM 22, RAM 23, Sub CPU board 30 provided with sub CPU 31, ROM 32, RAM 33, power source CPU board 40 provided with power source CPU 41, ROM 42, RAM 43, serial CPU board 50 provided with serial CPU 51, ROM 52, RAM 53, transmission CPU 61, ROM 62, A transmission CPU board 60 provided with a RAM 63 is provided.

  A ROM storing control programs and data provided on each CPU board and a RAM storing operation data are connected to each CPU, and each CPU board is connected to each other via a bus.

  A mode setting switch 14 provided on the main CPU board 10 sets a mode corresponding to an abnormality occurring in any of the CPUs. For example, a switch capable of switching such as a DIP switch is used. The CPU reset switch 15 is a switch used when the fire receiver 1 is restarted by manual operation.

  The main CPU board 10 is connected to a liquid crystal display 2, an acoustic device 6, and a printing device 7 provided in the fire receiver 1.

  The main CPU 11 displays the collected fire information and the like on the liquid crystal display 2, prints out the print information by the printing device 7, and executes and manages various tests and settings by operating the touch panel of the liquid crystal display 2. Furthermore, data management of the fire receiver 1 is also performed. In this embodiment, the liquid crystal display 2 is a display unit.

  The operation section CPU board 20 is connected with a district indicator lamp 3, an indicator lamp 4, and a switch 5 provided in the fire receiver 1.

  The operation unit CPU 21 performs the district display by the district indicator lamp 3 on the panel of the fire receiver 1, the display by the indicator lamp 4, and the operation information of the switch 5 is transmitted to the main CPU 11.

  The sub CPU 31 transmits the fire information from a terminal device (fire detector, repeater, etc.) (not shown) to the main CPU 11 and transmits various tests and setting information from the main CPU 11 to the terminal device. In addition to functioning as an I / F between devices, it also functions as an I / F with external devices such as a fire display device (not shown).

  The power supply CPU board 41 is connected to a standby power supply 8 composed of a rechargeable battery that is normally charged by a commercial power supply and supplies power to the fire receiver 1 in an emergency.

  The power supply CPU 41 monitors the state of the commercial power supply and supplies power to the fire receiver 1, and also monitors and tests the standby power supply 8.

  The serial CPU 51 communicates with other equipment (not shown).

  The transmission CPU 61 transmits and receives fire information and the like as an I / F with a terminal device connected to the fire receiver, and monitors the state of the connected transmission line.

The operation of the system will be described.
First, the state of the mode setting switch 14 is read when the fire receiver 1 is activated, and the mode when an abnormality occurs in each CPU is set based on the state.

  The mode set here is either a display holding mode for holding the display screen displayed on the liquid crystal display 2 or an automatic restart mode for automatically restarting the fire receiver 1. .

  Each CPU of the fire receiver 1 during normal operation performs a predetermined process based on a program stored in each ROM, thereby operating a disaster prevention system including fire monitoring.

  Next, a case where an abnormality occurs in any of the CPUs will be described. Here, the operation unit CPU 21 directly controlled by the main CPU 11 and the sub CPU 31 will be described as a first peripheral CPU, and the power supply CPU 41, serial CPU 51, and transmission CPU 61 directly controlled by the sub CPU 31 will be described as a second peripheral CPU.

  First, when the automatic restart mode is set, when the main CPU 11 detects an abnormality of the first peripheral CPU, the main CPU 11 enters an infinite loop to time up the watchdog timer. As a result, the main CPU 11 is electrically reset and initialized, and sends an initialization command to the first and second peripheral CPUs. Therefore, the fire receiver 1 is automatically restarted.

  When the sub CPU 31 detects an abnormality of the second peripheral CPU, the sub CPU 31 enters an infinite loop to time up the watchdog timer. As a result, the sub CPU 31 becomes abnormal, and when the main CPU 11 detects the abnormality of the sub CPU 31, the reset process is similarly performed, and the fire receiver 1 is automatically restarted.

  When the main CPU 11 detects the first peripheral CPU abnormality when the display holding mode is set, for example, an abnormality display screen 71 as shown in FIG. 3 is displayed on the liquid crystal display 2 and the sound device 6 is also displayed. The alarm is sounded, the printing output by the printing device 7 is performed, and then the sending of the operation confirmation command to the first peripheral CPU is stopped. The abnormality display screen 71 will be described later.

  When the sub CPU 31 detects an abnormality in the second peripheral CPU, the watchdog timer is timed up by entering an infinite loop. As a result, the sub CPU 31 becomes abnormal, and when the main CPU 11 detects the abnormality of the sub CPU 31, similarly, the abnormality occurrence notification process is performed, and then the communication is stopped.

  By checking the abnormal contents of the first or second peripheral CPU, removing the abnormal cause and then turning on the power again, or operating the CPU reset switch 15 provided on the main CPU board 10, a fire is caused. The receiver 1 can be brought into a normal state by restarting.

  FIG. 3 is an example of an abnormality display screen. Note that a description of portions not related to the gist of the present invention will be omitted. On the left side of the abnormality display screen 71, a plurality of abnormality contents 72 and 73 are displayed in order of occurrence from the top.

  First, when the abnormality content 72 is viewed, it is understood that the transmission CPU 61 is abnormal. Next, when the abnormality content 73 is seen, it is understood that the sub CPU 31 is abnormal.

  It can be seen from the abnormality content of the abnormality display screen 71 that the following operation has been performed.

  When the transmission CPU 61 provided in the fire receiver 1 becomes in an abnormal state due to some cause (noise or the like) and the sub CPU 31 detects that the transmission CPU 61 has become abnormal, the sub CPU 31 enters an infinite loop by itself, and the watch dock The sub CPU 31 becomes abnormal by increasing the timer.

  Then, when the main CPU 11 detects the abnormality of the sub CPU 31, the abnormality display screen 71 is displayed on the liquid crystal display 2.

  Since it can be seen from the abnormality display screen 71 that the transmission CPU 61 is abnormal, the transmission CPU board 60 is replaced in order to make the fire receiver 1 normal, and the fire receiver 1 is restarted to return to normal operation. Can do.

  By displaying the abnormality display screen 71 in this way, even if any of the CPUs becomes abnormal, the cause can be accurately determined, which is very useful.

  Even when the display holding mode is set, when the screen display such as the fire alarm and the abnormality display on the liquid crystal display 2 cannot be performed, for example, the main CPU 11 itself directly controlling the liquid crystal display 2 which is a display unit becomes abnormal. In this case, when the watchdog timer expires, the main CPU 11 is reset, and the fire receiver 1 is automatically restarted.

  When the automatic restart mode is set, the abnormality content of the CPU can be confirmed by collecting an abnormality occurrence history or printing the abnormality occurrence contents from the printing device 7.

  In selecting the mode, a switchable switch such as the mode setting switch 14 is used. However, the present invention is not limited thereto, and the mode may be selected and set by a touch panel operation from the liquid crystal display 2, for example.

It is a figure which shows the front of a fire receiver. It is a block diagram which shows the structure of a fire receiver. It is a figure which shows an abnormality display screen.

Explanation of symbols

1 Fire Receiver 2 Liquid Crystal Display (Display Unit)
8 Standby power 11 Main CPU
14 Mode setting switch 31 Sub CPU
61 Transmission CPU
71 Error display screen

Claims (2)

In a fire receiver comprising a plurality of CPUs and a display unit for displaying various information, performing predetermined processing by the plurality of CPUs and controlling the display unit by a main CPU of the plurality of CPUs ,
When any one of the CPUs other than the main CPU becomes abnormal, a display holding mode for holding the abnormal display screen displayed on the display unit as it is, and the fire receiver automatically A fire receiver characterized in that it is selected in advance whether one of the automatic restart modes to restart is supported. When any of the plurality of CPUs other than the main CPU becomes abnormal, and the display of the display unit cannot be held further, the fire receiver regardless of the selected mode. The fire receiver according to claim 1, which is automatically restarted.

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