JPH08255294A - Disaster monitoring device - Google Patents

Abstract

PURPOSE: To provide a disaster monitoring device whereby a transmission fault based on a crosstalk between respective systems which are connected to multiple terminals is evaded. CONSTITUTION: The device is provided with a transmission control part 17 which starts the transmission of a command within the plural kinds of commands which are transmitted by the respective systems at the time of reaching a transmission start point of time from the longest data number command so as to permit the transmission end point of time in the commands of the respective systems to coincide concerning the transmission timing of the plural systems in sub MPU12-1 and 12-2, adopts a longest processing time within the terminal processing times as against the transmitted commands of the respective systems as the terminal processing time of the whole systems so as to set the next transmission start point of time and to execute synchronization. Then, the transmission timing of the command is permitted to coincide in the whole systems. When plural sub MPUs exist, synchronization is executed by the input/output of a mutual transmission possible state signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster prevention monitoring apparatus in which terminals such as an analog sensor, a sensor repeater, and a controller repeater are connected to each of a plurality of transmission line systems drawn from a receiver. .

[0002]

2. Description of the Related Art Conventionally, various commands such as information gathering signals or control signals of terminals are called by calling by specifying an address due to a change in voltage to a terminal divided into a plurality of transmission line systems drawn from a receiver. There has been proposed a disaster prevention monitoring device which sends out a terminal for each system, such as returning information according to a change in current or executing a control signal when the terminal matches a designated address.

In this type of disaster prevention monitoring apparatus, the receiver collects information from each terminal and controls each terminal by a polling method. Transmission between the receiver and each terminal is performed by a transmission-dedicated MPU (hereinafter referred to as a sub MPU), and one sub MPU performs transmission for several systems. Sub M
When the PU receives a signal from the terminal, for example, a signal indicating that the analog value of the terminal has reached the caution display level, or a failure signal, each of the signals is used as an MPU for reception control (hereinafter referred to as "main MPU"). Send, display and alarm.

[0004]

However, in the conventional disaster prevention monitoring apparatus, the transmission to the terminal by the receiver is carried out independently for each system. That is, in one system, a sub-MPU may send a call signal to a certain terminal to request the analog value of the terminal, while in another system, the terminal may return a response signal to the sub-MPU.

In such independent transmission, when the transmission lines of the respective systems are arranged and arranged close to each other, the signal from the sub MPU to the terminal and the signal from the terminal to the sub MPU influence each other and cross. There is a problem that a talk occurs and a transmission failure occurs. This is because when a command is sent from the sub MPU to the terminal, the voltage is changed, and the response signal from the terminal to the sub MPU is returned with a weak current change. This is because the change causes noise to be added to the weak current signal, resulting in a transmission failure.

The present invention has been made based on such a background, and an object thereof is to provide a disaster prevention monitoring device capable of avoiding a transmission failure due to crosstalk between respective systems connecting a large number of terminals. To do.

[0007]

To achieve this object, the first invention of the present application is a system of a plurality of transmission lines drawn from a receiver having a main MPU for control and a sub MPU dedicated to transmission. Various commands such as information collection signals or control signals of the terminal are sent to the divided terminals by calling by specifying an address based on the change in voltage, and when the terminal matches the specified address, the information due to the change in current is sent. In a disaster prevention monitoring device that performs terminal processing such as returning or execution of control signals for each system, the transmission timing of multiple systems of the sub-MPU is controlled by multiple types of commands that are simultaneously transmitted by each system when the transmission start time is reached. Of the longest number of data in the system, start the transmission of the commands of each system to match the end point of the command transmission, and The length of processing time is regarded as a terminal processing time for all system characterized by comprising a transmission control unit for synchronizing and set the following transmission start time.

The second invention of the present application is the main M for control.
Various commands such as information collection signals or control signals of the terminals are sent to the terminals divided into a plurality of systems from the PU and the receiver having a plurality of sub MPUs dedicated to transmission by calling by specifying the address based on the voltage change. However, when the terminal matches the designated address, in the disaster prevention monitoring device that performs terminal processing such as returning information by changing current or executing control signal for each system, the transmission timing of all systems of a plurality of sub-MPUs, When the transmission start time is reached, the transmission is started from the one with the longest number of data among the multiple types of commands that are transmitted simultaneously in each system, the transmission end time of the command of each system is made to coincide, and the command of each system is transmitted. In order to set the next transmission start time and synchronize by considering the longest processing time among the terminal processing times as the terminal processing time of all systems, the sub MPU Each sub-MPU is provided with a communication synchronization input / output unit for transmitting / receiving a sendable-state signal according to the command of the maximum number of data to be sent to / from another sub-MPU when the sub-MPU is in the ready state. And

The third invention of the present application is the main M for control.
Various commands such as information collection signals or control signals of the terminals are sent to the terminals divided into a plurality of systems from the PU and the receiver having a plurality of sub MPUs dedicated to transmission by calling by specifying the address based on the voltage change. However, when the terminal matches the specified address, in the disaster prevention monitoring device that performs terminal processing such as returning information due to current change or execution of control signal for each system, in a predetermined time for all sub MPU system terminals In order to synchronously transmit a specific command for each sub-MPU, a communication synchronization input / output unit for transmitting / receiving a signal indicating that the sub-MPU is in the transmittable state to / from another sub-MPU is provided to each sub-MPU. The sub MPU is provided as one master sub MPU and other slave sub MPUs, and a synchronization signal is sent to the master sub MPU at predetermined time intervals. A synchronization signal output unit for outputting, to the slave sub MPU, characterized in that a synchronizing signal input unit for inputting a synchronization signal.

In this case, if the synchronization signal cannot be received within a predetermined time, the synchronization between the sub MPUs is released and the transmission is independently performed. Further, when the synchronization signal cannot be received within the predetermined time, the synchronization signal may be received from the main MPU at every predetermined time to establish synchronization.

[0011]

According to the first invention of the present application, the transmission timings of a plurality of systems handled by one sub-MPU are synchronized. Here, there are a plurality of types of commands to be transmitted from the sub MPU to the terminal, such as a polling command, an AD conversion command, and a recovery command. Differences in transmission time due to differences in the number of data transmitted by each command, and The time for command processing on the terminal side also differs.

Therefore, in order to match the transmission (sending) timings in all the systems, the commands to be sent are sent at the same time when the sending ends, and the longest processing of the terminal processing time for the commands of each system sent. The time is regarded as the terminal processing time of all systems. According to the second invention of the present application, when there are a plurality of sub-MPUs, all the sub-MPUs synchronously perform transmission to each system.

Here, the timing of the command to be transmitted is such that a plurality of sub-MPUs exchange a signal indicating that they are in a mutually transmittable state, and synchronously transmit each command to a plurality of systems. Further, according to the third invention of the present application, in order to synchronize the commands that need to be sent to the terminal periodically,
One sub-MPU is the master and the others are slaves, and a synchronization signal is periodically output from the master to the slave.
All sub-MPUs synchronously send commands to all terminals.

[0014]

FIG. 1 is a system configuration diagram of a disaster prevention monitoring device showing an embodiment of the present invention. In FIG. 1, a plurality of transmission lines 8 are drawn from a receiver 1, and an analog heat detector 2, an analog smoke detector 3, a detector repeater 4, and a control relay are provided as terminals on the transmission lines 8 of each system. The repeater 5 is serially connected. Further, a sensor line 9 is drawn out from the sensor repeater 4 and is connected to an on / off sensor 6.
Further, a control device 7 such as a smoke proof device is connected to the line drawn from the control repeater 5.

A maximum of 127 terminals can be connected to one transmission line 8, and a maximum of 127 types of unique addresses and type information are preset in each terminal. Further, a maximum of 4 lines are drawn from the sensor repeater 4 and the control repeater 5. On the receiver 1, a main MPU 11 that manages the entire receiver, a display that displays, for example, two sub MPUs 12-1 and 12-2 that perform data transmission with a terminal, an operation unit 13, a fire occurrence location, and the like. A section 14 and a power supply section 15 are provided.

The main MPU 11 has a reception controller 16. The sub MPUs 12-1 and 12-2 have a transmission control unit 17. In the normal monitoring state, the transmission control unit 17 repeats the function of sequentially sending polling commands to collect information of each terminal and sending an AD conversion command at predetermined time intervals (for example, every second). ing.

The AD conversion command is sent to the analog heat sensor 2
And a common command that does not depend on the address of the analog smoke sensor 3, and when the terminal receives an AD conversion command, the terminal performs AD conversion of the analog detection data of heat or smoke that is currently detected and stores it in the memory. The data stored in the memory is sent to the receiver 1 when the self address included in the polling command following the AD conversion command is determined.

FIG. 2 is a detailed block diagram of the sub MPU of the receiver shown in FIG. Each sub MPU 12-1, 12-2,
Each has a CPU 21, a communication port 22, an I / O port 23, and an interrupt port 24. In this embodiment, the sub MPU 12-2 is the master and the sub MPU
12-1 is a slave. The CPU 21 of both the master and the slave has a command timer 25 and an AD conversion interrupt monitoring timer 26, and the CPU 21 of the master has an AD conversion timer 27.

The command timer 25, as shown in FIGS. 3 and 5 which will be described later, generates command transmission timing, and the terminal processing time of each command is set. The AD conversion interrupt monitoring timer 26, when the AD conversion synchronization signal is not sent even after a certain period of time,
Each sub MPU is an overflow timer that releases the synchronization between the sub MPUs 12-1 and 12-2 so that an AD conversion command can be sent independently. In the embodiment, the overflow timer is set in the AD conversion timer 27. 120 of time
It is set to the value of%.

Further, the AD conversion timer 27 is shown in FIG.
As shown in (1), since it is necessary to send the AD conversion command periodically (for example, every second), it is provided for outputting the AD conversion synchronization signal from the master once per second. Then, in accordance with this AD conversion synchronization signal, each sub MPU 12-1, 12-2 synchronously sends an AD conversion command to all terminals.

The I / O port 23 is for each sub-MPU 12-
In order to synchronize the transmission timing of control signals and the like to the respective terminals 1 and 12-2, mutual sub-MPU 12-1,
12-2 is a port used for transmitting and receiving the state of 12-2, and I / O ports 23 are connected to each other. Sub M
When the PU is ready to send to the terminal, the sub M
It is a port for transmitting from the I / O port 23 in the PU that it is in the transmittable state to the other sub MPU, and is a port for receiving that it is in the transmittable state from the other sub MPU. It should be noted that various commands are sent to each terminal when the sub-MPUs 12-1 and 12-2 are ready to send each other by transmission / reception of the I / O port 23.

The interrupt port 24 is used by the sub MPU 12
Reference numerals -1, 12-2 are ports used for sending an AD conversion command in synchronization with each terminal, and the interrupt ports of each sub-MPU 12-1, 12-2 are connected to each other. . The AD conversion timer 27 of the master sub MPU 12-2 outputs an AD conversion synchronization signal from the interrupt port 24 to the interrupt port 24 of the slave sub MPU 12-1, for example, every one second.

The interrupt port 24 of the slave sub MPU 12-1 receives the AD conversion synchronizing signal and sends it to the CPU 21. Further, the AD conversion synchronization signal output from the interrupt port of the master sub MPU 12-2 is the slave sub MPU 12
Output to the -1 interrupt port and at the same time the main sub MP
The U12-2 itself is configured to return the interrupt port 24 again. As a result, the respective sub-MPUs match the time of receiving the AD conversion synchronization signal.

FIG. 3 is an output timing chart of each command. As shown in FIG. 3, in the disaster prevention monitoring device of the present invention, an AD conversion command (indicated by AD in FIG. 2) is first output from the transmission control unit 17 of the sub MPUs 12-1 and 12-2 of the receiver 1. Then, a polling command (indicated by P in FIG. 2) is output. The AD conversion command is output every one second.

Therefore, as shown in FIG. 3, when the AD conversion command is output at the time when the polling up to the address number 7 is completed, the polling command is sequentially transmitted from the address number 8 in the next polling. In addition, sub MPU
As commands to be sent from the terminals 12-1 and 12-2 to the terminal, in addition to the AD conversion command and the polling command,
After the operation test, after an error, the ON / OFF sensor of the repeater sends a recovery command sent after a fire is detected, a fire test command, a start command for a fire door, etc.

These commands differ in the transmission time due to the difference in the number of data transmitted by each command, and in the command processing time on the terminal side after transmission to the terminal. That is, in the command sent to the terminal, for example, the polling command is composed of 3 bytes of an 8-bit command field, an 8-bit address field, and an 8-bit checksum field.

Control commands such as a fire test signal and a fire door activation signal are stored in an 8-bit command field,
4 of 8-bit address field, 8-bit data field, and 8-bit checksum field
Composed of bytes. Regarding the return transmission number returned during the terminal processing time for each command, the return transmission number for the polling command is composed of 2 bytes of an 8-bit data field and an 8-bit checksum field. The return signal for the command is composed of 3 bytes of an 8-bit address field, an 8-bit data field and an 8-bit checksum field.

The present invention synchronizes the transmission timings of a plurality of systems handled by one sub MPU, and when there are a plurality of sub MPUs (in the case of the embodiment shown in FIG. 1), the sub MPUs. The main idea is to send various commands to each system in synchronization with each other.
At that time, it is necessary to consider the difference in the transmission time due to the difference in the number of data transmitted by each command and the difference in the processing time at the terminal for each command. That is, the commands sent from the receiver to the terminals are sent so that the end times of the commands are sent to the terminals, and the terminal processing time of the command sent to each system is the longest processing time. Considered as processing time, the next command is sent to the terminal after the terminal processing time has elapsed. By doing so, all systems can send commands in synchronization.

FIG. 4 is a timing diagram in which the transmission timings of eight systems of one sub MPU are synchronized. The content shown in FIG. 4 shows the first invention, and the polling command, control command, etc. of each system are synchronized by the operation of the transmission control unit 17 in FIG. The response signal of is also synchronized. As previously mentioned,
Since various commands such as polling commands and control commands differ in the amount of data to be transmitted, the end of transmission of each command is made the same for all systems. That is, when the polling command and the control command are sent to the terminal as in the first sending timing of FIG. 4, there is a difference in the number of data of 1 byte between the polling command and the control command.

Therefore, in order to match the transmission end times,
The polling command may be transmitted after the control command is transmitted by 1 byte. Furthermore, in order to send the next various commands, the command is sent after the longest terminal processing time has elapsed from the previously sent commands. Since the terminal processing time for the control command is the longest in FIG. 4, the terminal processing time for the control command is taken in all systems.

The AD conversion command is independently sent to all systems at once. Further, when transmitting a command of data of the same length in all systems, as in the case of the third transmission command in FIG. 4, it is possible to transmit all at once at the transmission timing without waiting. Figure 5
Shows the contents of the second invention. Figure 5 shows multiple sub-MPs
It is a timing chart of each part when synchronizing a transmission command between U.

In FIG. 5, (1) is the timing of sending the command of the sub MPU, (2) is the response timing of the terminal, and (3) is when any sub MPU is ready to send to each terminal. Ready output timing to turn on,
(4) shows the ready input timing that is turned on when the other sub-MPU is ready to send to each terminal.

For example, if the sub MPU 12-2 is in the transmittable state, the I / O port 23, which is a communication synchronization input / output unit, outputs to the other sub MPU 12-1 that it is in the transmittable state as a signal. That is, the ready output of (3) in FIG. 5 is turned on. If the other sub-MPU 12-1 is ready for sending, a signal ready for sending is sent from the I / O port 23 to the sub-MPU 12-2. That is, the ready input of (4) in FIG. 5 is turned on. Therefore, when both the ready output and the ready input are turned on, it is determined that all the sub MPUs are ready to be sent, and various commands are sent to the terminal in synchronization.

When a command having a different number of data is sent only to a specific system, a signal indicating that the maximum number of data of the command sent from the I / O port 23 can be sent in order to synchronize all sub MPUs. To the other sub-MPU. Further, as described above, in the case of transmitting only a predetermined number of data such as a 3-byte command and a 4-byte command, an individually predetermined transmittable state signal is sent to the I / O port 23 of another sub-MPU. It may be configured to send to

FIG. 6 shows the contents of the third invention. Figure 6
FIG. 4 is a timing diagram in the case of synchronizing AD conversion commands periodically sent to the terminal, for example, every one second among a plurality of sub MPUs, and the slave sub MPU 12-1 will be described as an example. In FIG. 6, (1) is the sub-MPU 12-
1 is a timing of sending a command, (2) is a response timing of the terminal, and (3) is a master sub MPU 12
-1 ready output timing (4) is other sub-MPU1
2-2 shows the ready input timing of 2-2, respectively.

The master sub MPU 12-2 inputs the AD conversion synchronizing signal to the slave sub MPU 12-1 every one second via the interrupt port 24 by the function of the AD conversion timer 27. Then, assuming that both the master and slave MPUs are ready to send, all sub-MPUs have AD
Send the conversion command synchronously. That is, as shown in FIG. 3, when the interrupt port 24 receives the AD conversion synchronization signal during the response of the terminal to the polling command in which the address number 7 is designated, the response signal of the terminal ends and the sub MP
When both U12-1 and U12-2 are ready to send, the AD conversion command (AD) is output synchronously from all the sub-MPUs.

Here, in the master sub MPU 12-2, an AD conversion synchronizing signal is sent from the interrupt port 24 to the slave sub MPU 12-1, and at the same time, the interrupt port 2 of its own.
The same AD conversion synchronizing signal is sent back to the 4th unit as well. Therefore, the master sub-MPU 12-2 receives the AD conversion synchronization signal returned to itself, and outputs an AD conversion command to the terminal when it is ready to send.

Further, each sub-MPU is provided with an AD conversion interrupt monitoring timer 26 to measure the time from the reception of an AD conversion synchronization signal to the reception of the next AD conversion synchronization signal. Therefore, for example, when the signal lines connecting the interrupt ports 24 are disconnected, the AD conversion synchronization signal becomes unreceivable and the AD conversion synchronization signal cannot be received within a predetermined time. Sub MPU independently AD
The conversion command may be sent, or the main M
The timer in the PU may be used to send the AD conversion command to the terminal.

[0039]

As described above, according to the first invention of the present application, the command transmission and the terminal response are asynchronously generated because the command transmission of a plurality of systems and the transmission timing of the terminal response which are handled by the sub MPU can be synchronized. In this case, a transmission failure due to crosstalk or the like can be prevented, and a highly reliable disaster prevention monitoring device can be provided.

Further, according to the second invention of the present application, since the transmission timings of command transmission and terminal response of all systems in a plurality of sub-MPUs can be synchronized, crosstalk etc. when command transmission and terminal response occur asynchronously, etc. It is possible to prevent a transmission failure due to the above and provide a highly reliable disaster prevention monitoring device over the entire system. Further, in the third invention of the present application, one of the plurality of sub MPUs is a master and the others are slaves, and a synchronization signal is periodically output from the master to the slaves to synchronize the transmission timing of all the sub MPUs. By doing so, even if the clocks of the individual sub MPUs have variations, it is possible to accurately maintain synchronization without causing timing deviation.

In this case, A
When the D sync signal is not sent, the synchronization between the sub MPUs is canceled and the AD conversion command is sent independently, or the AD sync signal is sent from the main MPU to all the sub MPUs. The reliability can be increased.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a disaster prevention monitoring device according to the present invention.

FIG. 2 is a detailed configuration diagram of a sub MPU of the receiver shown in FIG.

FIG. 3 is a timing diagram showing transmission of an AD conversion command and a polling command.

FIG. 4 is a timing diagram in which transmission timings of a plurality of types of commands transmitted from eight sub-MPU systems are synchronized according to the first invention.

FIG. 5 is a timing chart of each part when synchronizing polling commands among a plurality of sub MPUs according to the second invention.

FIG. 6 is a timing chart of each part when synchronizing an AD conversion command between a plurality of sub MPUs according to the third invention.

[Explanation of symbols]

 1: receiver 2, 3, 4, 5: terminal 11: main MPU 12-1, 12-2: sub MPU 21: CPU 22: communication port 23: I / O port (communication synchronous input / output unit) 24: 30% Input port 25: Command timer 26: AD conversion interrupt monitoring timer 27: AD conversion timer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Akiba 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Within Ho Chiki Co., Ltd.

Claims (5)

[Claims] 1. A terminal having a main MPU for control and a sub MPU dedicated to transmission and divided into a plurality of systems from a receiver, is called by specifying an address based on a voltage change, or an information collection signal of the terminal or In the disaster prevention monitoring device that sends various commands such as control signals, and when the terminal matches the designated address, performs terminal processing such as returning information due to current change or executing control signals for each system, Regarding the transmission timing of multiple systems, when the transmission start time is reached, transmission is started from the longest number of data among the multiple types of commands that are simultaneously transmitted by each system, and the transmission end time of the commands of each system is matched. Let
A transmission control unit is provided which regards the longest processing time among the terminal processing times for the commands of the respective systems transmitted as the terminal processing time of all systems and sets and synchronizes the next transmission start time point. Disaster prevention monitoring device. 2. An information gathering signal of a terminal when a terminal having a control main MPU and a receiver having a plurality of sub MPUs dedicated to transmission is divided into a plurality of systems by calling by specifying an address based on a voltage change. Or, when various commands such as control signals are sent, and the terminal matches the specified address, the terminal monitor processing such as sending back information due to changes in current or executing control signals for each system in a disaster prevention monitoring device Regarding the transmission timing of all the MPU systems, when the transmission start time is reached, the transmission is started from the longest number of data among the plurality of types of commands that are simultaneously transmitted by each system, and the transmission end time of the command of each system is completed. Match
In order to set the next transmission start time point and synchronize by regarding the longest processing time among the terminal processing times for the commands of each system sent as the terminal processing time of all the systems, the sub-MPU is in the ready state for sending. It is characterized in that each sub-MPU is provided with a communication synchronization input / output unit for transmitting / receiving a ready-to-send signal according to a command of the maximum number of data to be sent to / from another sub-MPU at a certain time. Disaster prevention monitoring device. 3. An information collection signal of a terminal by a call by designating an address based on a voltage change to a terminal divided into a plurality of systems from a receiver having a main MPU for control and a plurality of sub MPUs dedicated to transmission. Or, when various commands such as control signals are sent, and the terminal matches the specified address, the terminal monitor processing such as sending back information due to changes in current or executing control signals for each system in a disaster prevention monitoring device Communication for transmitting and receiving a signal indicating that the sub-MPU is in the transmittable state with other sub-MPUs in order to synchronously transmit a specific command to terminals of all systems of the MPU at predetermined time intervals A synchronous input / output unit is provided in each of the sub MPUs, and the sub MPUs are one master sub MPU and other slave sub MPUs, and the master sub MPU A disaster prevention monitoring device comprising: a synchronization signal output unit that outputs a synchronization signal to the slave sub MPU at predetermined time intervals; and a synchronization signal input unit that inputs the synchronization signal to the slave sub MPU. 4. The disaster prevention monitoring device according to claim 3, wherein when the synchronization signal cannot be received within a predetermined time, the synchronization between the sub MPUs is released and the transmission is performed independently. Disaster prevention monitoring device. 5. The disaster prevention monitoring apparatus according to claim 3, wherein when the synchronization signal cannot be received within a predetermined time, a synchronization signal is received from the main MPU at every predetermined time for synchronization. Disaster prevention monitoring device.