JP2016045006A - Gas meter, and control method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas meter and its control method which can save the trouble of resetting to be canceled when a gas alarm is found to be not normally connected.SOLUTION: A gas meter 1 is equipped with a setting acceptor unit 22 that, when it is determined that a gas alarm is normally connected, accepts setting information from outside and causes a setting memory unit 30 to store the information; a canceller unit 23 that, when it is determined that the gas alarm is not normally connected, cancels the setting information to be stored in the setting memory unit 30; a duplicate memory unit 40 that duplicates, ahead of cancellation by the canceller unit 23, and stores the setting information to be stored in the setting memory unit 30; and a setting restoration unit 24 that, when it is determined that the gas alarm is normally connected again after the setting information was cancelled by the canceller unit 23, causes the setting memory unit 30 to restore and store the setting information by using the setting information duplicated and stored in the duplicate memory unit 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gas meter and a control method thereof.

  Conventionally, there has been known a gas leak alarm device that issues an alarm when the concentration of a gas to be detected reaches a predetermined concentration or more (see Patent Document 1). A gas security system in which a gas meter for measuring a gas flow rate and a gas leak alarm are connected has also been proposed (see Patent Document 2).

  In the gas security system, the gas meter has a function linked to a gas leak alarm. For example, the gas meter has a usage time cutoff function that closes the cutoff valve when gas is used continuously for a cutoff judgment time or longer. This in-use function cutoff function can be expanded on the assumption that the gas meter and the gas alarm are normally connected.

  For example, the gas meter extends the interruption judgment time such as “Extended 2” or “Upper limit” by receiving a signal from the setting device or the gas management center on the assumption that the gas alarm device is normally connected. It is possible to extend the function to enable or disable.

JP-A-10-188175 JP 62-214499 A

  However, when the gas meter is determined to be in a state where the gas alarm is not normally connected, the settings such as “expansion 2” and “fixed upper limit” are cancelled. For this reason, when the gas alarm is fully replaced or when a power failure occurs, the gas meter determines that the gas alarm is not properly connected and the setting is released, which requires time for resetting. .

  This problem is not limited to “Expansion 2” or “Fixed upper limit” settings, but can be set when it is determined that the gas alarm is properly connected. This is a common problem in other settings that are canceled when it is determined that the state is not set.

  The present invention has been made to solve such a conventional problem, and the object of the present invention is to cancel the setting when it is determined that the gas alarm is not properly connected. It is an object to provide a gas meter and a control method thereof that can save the trouble of resetting.

  The gas meter of the present invention integrates and displays the flow rate of the gas passing through the flow path provided therein, and individually indicates whether each of the plurality of settings stored in the storage means is valid or cancelled. A gas meter that changes control contents according to a plurality of setting information, wherein a gas judgment device that judges whether or not a gas alarm device that detects and alarms a gas leak is normally connected, and a gas alarm by the connection judgment device A setting for accepting validation information for validating a specific setting from outside and storing the setting information indicating that the specific setting is valid in the storage means when it is determined that the device is normally connected When it is determined that the gas alarm is not normally connected by the reception unit and the connection determination unit, the setting information indicating that the specific setting is valid is canceled. Prior to release by the release means, copy storage means for copying and storing setting information stored by the storage means and indicating that the specific setting is valid, and release means After the release, when the connection determination unit determines that the gas alarm device is normally connected again, the setting information stored in the storage unit is stored in the storage unit using the setting information stored in the copy storage unit. And setting return means for returning and storing.

  According to the gas meter of the present invention, when it is determined that the gas alarm is not properly connected, the setting information indicating that the specific setting is valid is copied prior to releasing the setting. When it is determined that the gas alarm is normally connected again after being stored and released, the setting information is restored and stored in the storage means using the setting information stored in duplicate. For this reason, even if it is determined that the gas alarm device is not connected and a specific setting is released, if the gas alarm device is connected normally, information from the setting device or the gas management center The setting information indicating that the specific setting is valid is returned without transmission. Therefore, it is possible to save the trouble of resetting the setting that is released when it is determined that the gas alarm is not properly connected.

  In this gas meter, the duplicate storage means stores the specific setting stored in the storage means before the release by the release means after the connection determination means determines that the gas alarm is not normally connected. It is preferable to copy and store the setting information indicating that it is valid.

  According to this gas meter, since it is determined that the gas alarm is not properly connected and before the release, the setting information indicating that the specific setting is valid is duplicated and stored, so that the gas alarm is normally connected. As long as the setting information is valid, the setting information indicating that the specific setting is valid is not duplicated and stored. Thus, the setting information is not duplicated and stored except when necessary, and unnecessary processing can be omitted, and the possibility of malfunctions based on the duplicated and stored information can be reduced.

  In this gas meter, it is preferable that the duplicate storage unit deletes the duplicated and stored setting information after a predetermined period.

  According to this gas meter, after the elapse of a predetermined period, the setting information stored in duplicate is deleted, so that the setting information indicating that the specific setting is valid, such as at the time of a power failure or at the time of verification, is canceled. However, when the gas alarm is reconnected in a relatively short time, the setting information is stored and retained, and the gas alarm is maintained for a relatively long time, such as when the gas meter itself is moved to another location and installed. If is not reconnected, the setting information is deleted. Therefore, it is possible to distinguish between the case where the setting information is desired to be restored and the case where the same setting is required as in the case of moving and installing the gas meter, and the case where the setting information is not desired to be restored. Can be improved.

  In this gas meter, the duplicate storage means, for any one or more of a plurality of settings including the specific setting, when the valid state or the release state of the setting information is changed to the other state, the duplicated and stored setting information Is preferably erased.

  According to this gas meter, if any one or more of a plurality of settings is changed from a valid state or a canceled state of the setting information to the other state, the setting information stored in duplicate is deleted and stored. Even if it is held, the gas alarm device is normally connected again by prioritizing manual settings (for example, setting operations from the setting device or gas management center) and deleting the copied and stored setting information. Sometimes it is possible to prevent unintended settings.

  The gas meter control method of the present invention integrates and displays the flow rate of the gas passing through the flow path provided in the interior, and stores whether or not each of the plurality of settings stored in the storage means is valid. A gas meter control method for changing control content according to a plurality of setting information shown individually, a connection determination step for determining whether a gas alarm for detecting and alarming gas leakage is normally connected, and When it is determined that the gas alarm device is normally connected in the connection determination step, the setting information indicating that the specific setting is valid is received by receiving activation information for enabling the specific setting from the outside. Setting information indicating that the specific setting is valid when it is determined that the gas alarm is not normally connected in the setting reception step stored in the storage means and the connection determination step; A release step for releasing the setting and storing the setting in the storage unit, and a copy for storing the setting information stored by the storage unit and indicating that the specific setting is valid prior to the release in the release step. After the storage step and the release in the release step, the second connection determination step for determining again whether the gas alarm device is normally connected, and the gas alarm device is normally connected in the second connection determination step. A setting return step of returning the setting information to the storage means using the setting information that has been copied and stored in the copy storage step.

  According to the gas meter control method of the present invention, when it is determined that the gas alarm is not normally connected, the setting information indicating that the specific setting is valid is set prior to canceling the setting. The information is duplicated and stored, and when it is determined that the gas alarm is normally connected again after being released, the setting information is restored and stored in the storage means using the setting information stored in duplicate. For this reason, even if it is determined that the gas alarm device is not connected and a specific setting is released, if the gas alarm device is connected normally, information from the setting device or the gas management center The setting information indicating that the specific setting is valid is returned without transmission. Therefore, it is possible to save the trouble of resetting the setting that is released when it is determined that the gas alarm is not properly connected.

  According to the present invention, it is possible to save the trouble of resetting the setting that is released when it is determined that the gas alarm is not properly connected.

It is a functional lineblock diagram of the gas meter concerning the embodiment of the present invention. It is a flowchart which shows the control method of the gas meter which concerns on this embodiment, and has shown the process regarding determination of the normal connection of a gas alarm device. It is a flowchart which shows the control method of the gas meter which concerns on this embodiment, and has shown the process regarding the memory | storage etc. of setting information. It is a flowchart which shows the control method of the gas meter which concerns on this embodiment, and has shown processes, such as cancellation | release and replication storage. It is a flowchart which shows the control method of the gas meter which concerns on this embodiment, and has shown the process regarding a setting reset.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following. FIG. 1 is a functional configuration diagram of a gas meter according to an embodiment of the present invention. As shown in FIG. 1, a gas meter 1 according to this embodiment is a microcomputer gas meter equipped with a so-called microcomputer, and integrates the flow rate of gas passing through a flow path provided therein to display a liquid crystal display (not shown). Z).

  Such a gas meter 1 includes a communication I / F unit 10, a control unit 20, and a setting storage unit (storage unit) 30.

  The communication I / F unit 10 is a connection part for the gas meter 1 to communicate with the outside, and receives a signal (communication message) from a setting device, a gas management center, or the like.

The control unit 20 controls the entire gas meter 1, and in particular in the present embodiment, a plurality of setting information individually indicating whether each of a plurality of settings is valid or canceled is stored in the setting storage unit 30. The contents of control are stored and the control contents are changed according to the setting information. The setting storage unit 30 stores setting information corresponding to a communication message from a setting device, a gas management center, or the like. Such a control part 20 and the setting memory | storage part 30 can be comprised with a microcomputer.

  The control unit 20 includes a connection determination unit (connection determination unit) 21, a setting reception unit (setting reception unit) 22, and a cancellation unit (release unit) 23.

  The connection determination unit 21 determines whether or not a gas alarm device that detects and alarms a gas leak is normally connected. Such a connection determination unit 21 determines whether or not the gas alarm is in the unconnected state in the first place, and whether or not the gas alarm outlet plug is disconnected. It is like that. Both of these states are states in which the gas alarm is not normally connected (hereinafter referred to as a connected NG state).

  If it demonstrates in detail, the connection judgment part 21 will transmit the inquiry signal for every predetermined time (for example, 1 minute) with respect to a gas alarm device. When the gas alarm is normally connected, the gas alarm responds in response to the inquiry signal. Therefore, the connection determination unit 21 determines that the connection is not established when there is no reply (more preferably, when there is no continuous multiple times (for example, 11 times)). That is, the connection determination unit 21 determines that the connection is in the NG state.

  Further, when the outlet plug is disconnected, the gas alarm device transmits a signal indicating that the plug has been disconnected to the gas meter 1 using the power charged in the capacitor inside the alarm device. Furthermore, the connection determination part 21 of the gas meter 1 transmits a confirmation signal every 2nd predetermined time (for example, 10 minutes) different from the said predetermined time. Then, when there is no reply according to the confirmation signal (more preferably, when there is no continuous multiple times (for example, four times)) and when a signal indicating that the plug has been removed is input, the connection determination unit 21 Is determined to be in the unplugged state. That is, the connection determination unit 21 determines that the connection is in the NG state.

  On the other hand, if not corresponding to the above, the connection determination unit 21 determines that the gas alarm is in a normally connected state (hereinafter referred to as a connection OK state).

  When the connection determination unit 21 determines that the connection is in an OK state, the setting reception unit 22 receives activation information for activating a specific setting from the outside (setting device or gas management center), and the specific setting is received. Setting information indicating that the setting is valid is stored in the setting storage unit 30.

  Here, the specific setting is, for example, “extension 2 (an example of specific setting)” or “fixed upper limit (an example of specific setting)”. In other words, “expansion 2” and “fixed upper limit” are settings in the usage time cutoff function that shuts off the flow path by operating the cutoff valve when the duration of the flow rate for each of the plurality of flow rate segments is equal to or longer than the cutoff judgment time. Yes, it is a setting related to the interruption determination time for prolonging or invalidating the interruption determination time. If such a setting is validated, the gas meter 1 will function in an unsafe direction. Therefore, such a setting is effective only when the connection determining unit 21 determines that the connection is in an OK state, that is, only when the gas alarm device and the gas meter 1 are normally connected to ensure safety. It becomes possible.

  Accordingly, setting information such as “fixed below the lower limit value” that does not function in the unsafe direction is accepted by the setting accepting unit 22 regardless of the determination result of whether or not the connection determining unit 21 is in the connection OK state. Stored in the unit 30.

  If it demonstrates in detail, the message regarding the some setting containing said specific setting will be transmitted collectively from a setting device or a gas management center. Therefore, the setting reception unit 22 determines whether there is information for enabling or canceling the specific setting in the transmitted message. If there is no information, the connection determination unit 21 determines that the connection is OK. Regardless of whether or not it is determined, the electronic message is accepted. On the other hand, the setting accepting unit 22 determines whether there is information for enabling or canceling the specific setting. When it is determined that there is information, the setting receiving unit 22 enables or cancels the specific setting unless the connection is OK. Do not accept only. Therefore, in this case, there is activation information for enabling the setting of “fixed below the lower limit value” that does not function in the unsafe direction and activation information for enabling the setting of “extension 2” that functions in the unsafe direction. If it is included, the validation information “extension 2” is not accepted, and the validation information “fixed below the lower limit value” is accepted. Therefore, only the setting of “fixed below the lower limit value” is validated.

  The canceling unit 23 cancels the setting and stores the setting information indicating that the specific setting is valid in the setting storage unit 30 when the connection determining unit 21 determines that the connection is NG. is there. That is, the setting information to be canceled is setting information such as “expansion 2” and “fixed upper limit” that cause the gas meter 1 to function in an unsafe direction. Therefore, setting information such as “fixed below the lower limit value” that does not cause the gas meter 1 to function in an unsafe direction is not subject to release.

  In this way, when the setting is valid for specific settings such as “expansion 2” and “fixed upper limit” that cause the release unit 23 to function the gas meter 1 in an unsafe direction, the setting is released. Therefore, it is possible to improve the safety by preventing the situation where the gas meter 1 is in the connected NG state and the gas meter 1 is functioning in an unsafe direction.

  However, due to the provision of the release unit 23, the setting is released for the setting information indicating that the specific setting is valid because it is determined to be in the connection NG state at the time of replacement of the gas alarm device or at the time of power failure. In some cases, it took time to re-set. That is, in such a case, it is normal to maintain the valid state for the settings such as “expansion 2” and “fixed upper limit”, and if they are released, they must be reset, which is very troublesome. there were.

  Therefore, in the present embodiment, the gas meter 1 includes a replication storage unit (replication storage unit) 40 and the control unit 20 includes a setting recovery unit (setting recovery unit) 24.

  The duplicate storage unit 40 duplicates and stores the setting information stored in the setting storage unit 30 prior to the release by the release unit 23. Note that the duplicate storage unit 40 may or may not duplicate and store information such as “fixed below the lower limit value” that is not a release target. In the following description, it is assumed that information such as “fixed below the lower limit value” is not duplicated and stored.

  After the setting information is canceled by the canceling unit 23 and the connection determining unit 21 determines that the connection is in the OK state again, the setting returning unit 24 replicates the setting information that has been copied and stored by the copy storage unit 40. The setting information is restored and stored in the setting storage unit 30. With this configuration, the released setting information is recalled to the setting storage unit 30, and the setting information indicating that the specific setting is valid is restored without a communication message from the setting device or the gas management center. Can be made.

  Note that the timing for replicating the setting information in the replica storage unit 40 may be before the cancellation of the canceling unit 23, for example, immediately after the specific setting is validated and stored in the setting storage unit 30. Also good. However, it is preferable that the replication storage timing is before the release of the release unit 23 after the connection determination unit 21 determines that the connection is NG. This is because the setting information is not duplicated and stored in the duplicate storage unit 40 except when necessary, and unnecessary processing can be omitted.

  Furthermore, it is preferable that the copy storage unit 40 deletes the setting information that has been stored in a duplicate after a predetermined period of time has elapsed before the release unit 23 releases it after determining that it is in the connected NG state. As a result, although the setting information is canceled at the time of a power failure or inspection, when the gas alarm is reconnected in a relatively short time, the setting information is stored and held, and the gas meter 1 itself is moved to another location. If the gas alarm is not reconnected for a relatively long period of time, such as when it is moved and installed, the setting information is cancelled. Therefore, it is possible to distinguish between the case where the setting information is desired to be restored and the case where it is unclear whether the same setting is required as in the case of moving the gas meter 1 and the setting information is not desired to be restored. Can be improved.

  In addition, for any one or more of a plurality of settings including a specific setting, the duplicate storage unit 40 erases the duplicated and stored setting information when the valid state or the released state of the setting is changed to the other state. It is preferable. As a result, even when the setting information is duplicated and stored, the setting by manual (for example, setting operation from the setting device or the gas management center) is given priority, and the gas alarm is This is because an unintended setting can be prevented when the connection is normally made again.

  2-5 is a flowchart which shows the control method of the gas meter 1 which concerns on this embodiment, and FIG. 2 has shown the process regarding determination of the normal connection of a gas alarm device. First, as shown in FIG. 2, the connection determination unit 21 of the control unit 20 executes a connection determination process (S1). In this process, signal transmission or the like is performed as described above to determine whether or not it is in an unconnected state and whether or not it is in a plug-out state.

  Then, the connection determination unit 21 determines whether the connection is in an OK state (S2). If it is determined that the connection is OK (S2: YES), the control unit 20 turns on the connection flag (S3), and the process shown in FIG. On the other hand, if it is determined that the connection NG state is established instead of the connection OK state (S2: NO), the control unit 20 turns off the connection flag (S4), and the process shown in FIG.

  The process shown in FIG. 2 is repeatedly executed until the power of the gas meter 1 is turned off.

  FIG. 3 shows processing related to storage of setting information and the like. As shown in FIG. 3, the control unit 20 of the gas meter 1 determines whether a communication telegram has been input (S11). If it is determined that a communication message has not been input (S11: NO), this process is repeated until it is determined that the communication message has been input.

  When it is determined that a communication message has been input (S11: YES), the control unit 20 determines whether the communication message includes information for changing a specific setting (S12). That is, the control unit 20 determines whether information related to settings such as “expansion 2” and “fixed upper limit” that cause the gas meter 1 to function in an unsafe direction is included.

  When it is determined that the information to change the specific setting is included (S12: YES), the control unit 20 determines whether the connection flag is in the on state (S13). If it is determined that it is in the on state (S13: YES), the setting accepting unit 22 accepts the setting change by the input communication message and stores it in the setting storage unit 30 (S14). In other words, when the validation information for validating the specific setting is included, the setting information indicating that the specific setting is valid is stored. Then, the process shown in FIG. 3 ends.

  On the other hand, when determining that it is not in the ON state (S13: NO), the control unit 20 determines whether information for changing a setting other than the specific setting is included (S15). In other words, the control unit 20 determines whether information related to the setting such as “fixed below the lower limit value” is included. When it is determined that the information for changing the setting other than the specific setting is included (S15: YES), the control unit 20 receives the change of the setting such as “fixed below the lower limit value” and stores it in the setting storage unit 30. (S14). Then, the process shown in FIG. 3 ends.

  On the other hand, if it is determined that the information for changing the setting other than the specific setting is not included (S15: NO), the input communication message changes only the specific setting. The communication message itself is not accepted. Therefore, the storage process in step S14 is not executed, and the process shown in FIG. 3 ends.

  By the way, when it is determined that the information to change the specific setting is not included in the communication message (S12: NO), the control unit 20 determines that the communication message is related to the setting such as “fixed below the lower limit value”. Then, after the storage process in step S14, the process shown in FIG.

  FIG. 4 shows processing such as cancellation and copy storage. As shown in FIG. 4, the control unit 20 first determines whether or not the connection flag is in an off state (S21). If it is determined that the connection flag is not in the off state (S21: NO), the process shown in FIG. 4 ends.

  When it is determined that the connection flag is in the off state (S21: YES), the control unit 20 determines whether the setting information to be canceled is stored in the setting storage unit 30 (S22). That is, the control unit 20 determines whether setting information indicating that specific settings such as “extension 2” and “fixed upper limit” are valid is stored.

  When it is determined that the setting information indicating that the specific setting is valid is stored (S22: YES), the control unit 20 copies the setting information stored in the setting storage unit 30 to the copy storage unit 40. Store (S23). Thereafter, the canceling unit 23 cancels the setting for the setting information (S24), and the process illustrated in FIG. 4 ends.

  On the other hand, when it is determined that the setting information indicating that the specific setting is valid is not stored (S22: NO), the control unit 20 determines whether the setting information is duplicated and stored in the duplicate storage unit 40 ( S25). That is, it is determined whether the setting information indicating that the specific setting is valid has been copied and stored through the process of step S23.

  When it is determined that the setting information indicating that the specific setting is valid is not stored in duplicate (S25: NO), the process illustrated in FIG. 4 ends. When it is determined that the setting information indicating that the specific setting is valid is stored in duplicate (S25: YES), the control unit 20 replicates and stores the setting information (that is, from the process of step S23) for a predetermined period. It is determined whether (predetermined period) has elapsed (S26).

  When it is determined that the predetermined period has elapsed (S26: YES), the control unit 20 deletes the setting information copied and stored in the copy storage unit 40 (S27). Thereafter, the process shown in FIG. 4 ends.

  On the other hand, when it is determined that the predetermined period has not elapsed (S26: NO), the control unit 20 determines whether there is a communication message to change the setting information (S28). When it is determined that there is a communication message for changing the setting information (S28: YES), the control unit 20 deletes the setting information stored in the duplicate storage unit 40 (S27), and the process shown in FIG. finish. When it is determined that there is no communication message for changing the setting information (S28: NO), the setting information stored in the copy storage unit 40 is not deleted, and the process illustrated in FIG. 4 ends.

  FIG. 5 shows processing related to setting return. As shown in FIG. 5, the control unit 20 first determines whether or not the connection flag is on (S31). When it is determined that it is not in the on state (S31: NO), the processing shown in FIG.

  On the other hand, when determining that it is in the on state (S31: YES), the control unit 20 determines whether or not the setting information is duplicated and stored in the duplicate storage unit 40 (S32). If it is determined that the setting information is not stored in duplicate (S32: NO), the process shown in FIG. 5 ends.

  When determining that the setting information is duplicated and stored (S32: YES), the control unit 20 restores and stores the setting information duplicated and stored in the replica storage unit 40 in the setting storage unit 30 (S33). That is, the control unit 20 restores the setting information released by the release unit 23.

  Thereafter, the control unit 20 deletes the setting information copied and stored in the copy storage unit 40 (S34), and the process shown in FIG. 5 ends.

  Thus, according to the gas meter 1 and the control method according to the present embodiment, when it is determined that the gas alarm is not normally connected, the setting information indicating that the specific setting is valid, Prior to canceling the setting, the setting information is duplicated and stored, and when it is determined that the gas alarm is normally connected again after the cancellation, the setting storage unit uses the setting information stored in duplicate. The setting information is returned to 30 and stored. For this reason, even if it is determined that the gas alarm device is not connected and a specific setting is released, if the gas alarm device is connected normally, information from the setting device or the gas management center The setting information indicating that the specific setting is valid is returned without transmission. Therefore, it is possible to save the trouble of resetting the setting that is released when it is determined that the gas alarm is not properly connected.

  Also, since it is determined that the gas alarm is not properly connected and before the release, the setting information indicating that the specific setting is valid is duplicated and stored. The setting information indicating that the setting is valid is not duplicated and stored. Thus, the setting information is not duplicated and stored except when necessary, and unnecessary processing can be omitted, and the possibility of malfunctions based on the duplicated and stored information can be reduced.

  In addition, after the elapse of a predetermined period, the setting information stored in a duplicated manner is erased, so that the setting information indicating that a specific setting is valid, such as at the time of a power failure or at the time of verification, is canceled but relatively short. When the gas alarm is reconnected over time, the setting information is stored and retained, and the gas alarm is not reconnected for a relatively long time, such as when the gas meter itself is moved to another location and installed. In this case, the setting information is deleted. Therefore, it is possible to distinguish between the case where the setting information is desired to be restored and the case where the same setting is required as in the case of moving and installing the gas meter, and the case where the setting information is not desired to be restored. Can be improved.

  In addition, for any one or more of a plurality of settings, when the valid or canceled state of the setting information is changed to the other state, the setting information is duplicated and stored in order to delete the setting information that has been duplicated and stored. Even if the gas alarm device is normally connected again by giving priority to manual settings (for example, setting operations from the setting device or gas management center) and deleting the copied and stored setting information, It is possible to prevent the setting from not being performed.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, as shown in step S34 in FIG. 5, when the setting information duplicated and stored in the duplicate storage unit 40 is returned to the setting storage unit 30, the setting information duplicated and stored in the duplicate storage unit 40 is deleted. However, it may be stored and held without being erased. In this case, it may be erased after a predetermined period of time has elapsed after returning to the setting storage unit 30.

1: Gas meter 10: Communication I / F unit 20: Control unit 21: Connection determination unit (connection determination means)
22: Setting reception unit (setting reception means)
23: Release part (release means)
24: Setting return unit (setting return means)
30: Setting storage section (storage means)
40: Replication storage unit (replication storage means)

Claims (5)

According to a plurality of setting information individually indicating whether each of a plurality of settings stored in the storage means is valid or cancelled, while accumulating and displaying the flow rate of the gas passing through the flow path provided inside. Gas meter to change the control content,
A connection judgment means for judging whether or not a gas alarm for detecting and leaking a gas is normally connected;
When it is determined by the connection determining means that the gas alarm is normally connected, the setting information indicating that the specific setting is valid by accepting the activation information for enabling the specific setting from the outside. Setting accepting means to be stored in the storage means;
Release means for releasing the setting and storing the setting information indicating that the specific setting is valid when the connection determination means determines that the gas alarm is not normally connected. When,
Prior to release by the release means, copy storage means for copying and storing setting information that is stored by the storage means and that the specific setting is valid;
After the release by the release means, when the connection determination means determines that the gas alarm is normally connected again, the storage means using the setting information copied and stored by the copy storage means A setting return means for resetting and storing the setting information;
A gas meter comprising: The duplicate storage means is stored by the storage means after the judgment by the connection judgment means that the gas alarm is not normally connected and is released by the release means, and the specific setting is valid. The gas meter according to claim 1, wherein the setting information is copied and stored. The gas meter according to claim 2, wherein the duplicate storage unit deletes the duplicated and stored setting information after elapse of a predetermined period. The duplicate storage means deletes the duplicated and stored setting information when the valid state or release state of the setting information is changed to the other state for any one or more of the plurality of settings including the specific setting. The gas meter according to any one of claims 1 and 2. According to a plurality of setting information individually indicating whether each of a plurality of settings stored in the storage means is valid or cancelled, while accumulating and displaying the flow rate of the gas passing through the flow path provided inside. Gas meter control method for changing the control content,
A connection determination step for determining whether or not a gas alarm for detecting and leaking a gas is normally connected;
When it is determined that the gas alarm device is normally connected in the connection determination step, setting information indicating that the specific setting is valid by accepting activation information for enabling the specific setting from the outside. A setting accepting step to be stored in the storage means;
When it is determined that the gas alarm device is not normally connected in the connection determination step, the setting information indicating that the specific setting is valid is canceled and stored in the storage unit. When,
Prior to release in the release step, a copy storage step for copying and storing setting information that is stored by the storage means and that the specific setting is valid;
A second connection determination step of determining whether the gas alarm is normally connected again after release by the release step;
When it is determined that the gas alarm device is normally connected in the second connection determination step, the setting information is restored and stored in the storage unit using the setting information stored in the copy storage step. Setting return process,
A control method for a gas meter, comprising:

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