JPH1198166A - Transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a master side to easily judge whether a return signal from a slave side is a required return signal or not by including response identification data indicating a signal requested from the master side in a return signal to be sent from the slave side. SOLUTION: A first alarm equipment FS1 is constituted of a fire receiver RE, a display device DS, a sensor S, a disaster preventing instrument I, and a smoke preventing/exhaust equipment C. The fire receiver RE is constituted of a control substrate MCU to be a master side and a sensor receiving extended substrate FLU, a smoke preventing/exhaust equipment substrate SLU and a movement information outputting extended substrate ROU which are a slave side, and so on. In the constitution, mutually different addresses are respectively applied to respective substrate FLU, SLU, ROU and these slave side substrates and the control substrate MCU communicate with each other. In the communication, response identification data indicating a response signal requested from the master side are included in a return signal from the slave side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a plurality of slaves, each of which is assigned a different address. The master designates a predetermined slave from among the plurality of slaves, and the master designates a predetermined slave. The master side requests a return signal from the slave side, and the slave side designated as the master side sends a return signal to the master side.

[0002]

2. Description of the Related Art In a conventional transmission system, when a master side and a plurality of slave sides communicate with each other, a different address is previously assigned to each of the plurality of slave sides, and a predetermined slave is selected from among the plurality of slave sides. The master side specifies the master side, the master side requests a return signal from the specified slave side, and the specified slave side sends a return signal to the master side.

In the above case, the master obtains a return signal from the slave by polling and selecting. The polling is an operation in which the master side requests a plurality of slave sides to return the above-mentioned return signal in a predetermined order, and the slave side which has come in order transmits the return signal. Is an operation that requests only a predetermined slave side of the plurality of slave sides to return a return signal, and the requested slave side transmits a return signal.

[0004]

By the way, the timing at which the specified slave side transmits a return signal is predetermined, and the signal transmitted at this timing is a return signal returned from the slave side specified by the master side. Judge that there is.

[0005] However, in the above-mentioned conventional example, when a predetermined slave does not return a return signal at a predetermined timing and another slave transmits a signal,
There is a problem that the master cannot recognize that the received signal is a signal transmitted by a slave other than the intended slave.

Further, in the above-mentioned conventional example, at a predetermined timing, a predetermined slave transmits a signal, and even if the signal is a signal other than the return signal, the slave receives a signal other than the return signal. There is a problem that the master side cannot recognize this.

Further, in the above conventional example, when the master side tries to obtain a return signal from the slave side by polling, when the slave side returns a return signal according to the selecting, when the slave side returns a return signal according to the selecting, the slave side returns the return signal according to the selecting. There is a problem that the master cannot recognize that the signal is being returned.

According to the present invention, there is provided a transmission system in which when a master sends a return request to a slave, the master can easily and quickly determine whether a signal received from the slave is a return signal requested by the master. The purpose is to provide.

[0009]

According to the present invention, in a transmission system in which different addresses are assigned in advance to each of a plurality of slaves and a master communicates with the plurality of slaves, the plurality of slaves communicate with each other. The master side designates a predetermined slave side from among the above, the master side requests a return signal to the slave side designated by the master side, and the slave side designated as the master side sends a return signal to the master side The response identification data indicating the response signal requested from the master side,
This is included in the return signal transmitted by the slave side.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a fire alarm system FS1 according to one embodiment of the present invention.

The fire alarm system FS1 is an in-panel system of a P-type receiver multi-line wall-mounted type, and includes a fire receiver RE, a display unit DS, a sensor S, a disaster prevention device I, and a smoke prevention device C. And

The fire receiver RE is provided with a control board MC.
U, an additional board FLU for sensor reception, a board SLU for smoke prevention equipment, an additional board ROU for transmission output, and a power supply PS.

Here, the control board MCU is an example of the master side, and each of the additional board for sensor reception FLU, the board for smoke prevention equipment SLU, and the additional board for transfer output ROU is an example of the slave side.

That is, different addresses are assigned to each of the additional board for sensor reception FLU, the board for Smoke evacuating equipment SLU and the additional board for ROUT output ROU, and the control board MCU (master side, master station) The additional board FLU for sensor reception, the board SLU for smoke elimination equipment, and the additional board ROU for signaling output (a plurality of slaves, slave stations) communicate with each other.

In this case, the line system of the communication interface is a UART TTL level system, and the transmission system is a half-duplex communication system. The synchronization system is a start-stop synchronization system, in which one bit is used as a start bit and one bit is used as a stop bit. The communication speed is 9600 bps, and the transmission code is ASCI
I8 (odd number parity, LSB first), and the error control method is a code check by a sum check.

FIG. 2 is a diagram showing a basic transmission format in the above embodiment.

In the following description, the control board MCU is called a master side, and the additional board FLU for sensor reception, the board SLU for smoke prevention equipment, and the additional board ROU for transfer output are called slave sides. In FIG. 2, “M” indicates the master side, and “S” indicates the slave side.

As shown in FIG. 2A, when a master sends a simultaneous command to a slave, the master starts sending a data start character SOH, a command CM1, and a data DT.
1, DT2, the upper four bits SF1 of the sum check code sent from the master side to the slave side, and the lower four bits SF2 of the sum check code. When the slave receives the simultaneous command from the master, the slave does not respond to the master.

As shown in FIG. 2 (2), in the case of polling, the master side determines the data start character SOH, command CM1, upper address ADU in the board, lower address ADL in the board, and upper 4 bits SF of the sum check code.
1. Send the lower 4 bits SF2 of the sum check code. Then, the slave side sends the command CM2, the upper address digit ADU in the board, the lower digit ADL in the board address, the basic status DM, the data D1 to D10, and the upper 4 bits S of the sum check code returned from the slave side to the master side.
S1, the lower 4 bits SS2 of the sum check code are transmitted.

The polling is an operation in which the master requests the plurality of slaves to return the return signals in a predetermined order, and the slaves having come in order transmit the return signals.

As will be described later, the command CM2 contains response identification data indicating a response signal requested by the master.

As shown in FIG. 2 (3), in the case of selecting, the master side receives data start character SOH, command CM1, upper address digit ADU in the board, lower address ADL in the board address, collective control command SM, line 1 ~ 20
Control data S1 to S5, the upper four of the sum check code
Bit SF1, lower 4 bits SF of the sum check code
Send out 2. Then, the slave side receives the command CM
2. 10th ADU in the board, 1st AD in the board
L, basic status DM, data D1 to D10, upper 4 bits SS1 of the sum check code returned from the slave side to the master side, and lower 4 bits SS2 of the same sum check code.

The selecting is an operation in which only a predetermined one of the plurality of slaves is requested to return a return signal, and the requested slave transmits a return signal.

As will be described later, the command CM2 includes response identification data indicating a response signal requested by the master.

By the way, when each of the following (1) to (5) occurs consecutively five times when the master transmits to the slave, the master determines that the slave has no response.

No response to polling / selecting signal, error in sum check for polling / selecting signal, abnormal response to polling / selecting signal Command in-panel address in response to polling / selecting signal is abnormal, ASCII for selecting signal
Code error, transmission error for polling / selecting signal.

When the master determines that there is no response,
Normally, polling is performed for the FLU, SLU, and ROU that are abnormal. When the polling response is normally received, the non-response is returned, and the communication state is returned to the normal sequence.

FIG. 3 is a diagram showing details of characters in the text format in the above embodiment.

Command CM sent from master to slave
1 is composed of 4 bits as shown in FIG.
If the bit 0 is “1”, the command sent below is a simultaneous command, and if the bit 1 is “1”, the command sent below is a polling, If the bit 2 is “1”,
The command sent below indicates that it is a selecting.

On the other hand, the command CM2 sent from the slave side to the master side is composed of 4 bits as shown in FIG. 3 (2). If the bit 1 is "1", the following data is a polling response. If the bit 2 is “1”, it indicates that the command transmitted below is data of a selecting response.

FIG. 4 shows data DT1, D2 when the master sends a simultaneous command in the above embodiment.
It is a figure showing the example of T2.

If the bit 0 of the data DT1 is "1", it is a recovery instruction, and if it is "0", it indicates that the recovery instruction has been released. Bits 1 to of data DT1
3. The data DT2 is empty for the future.

FIG. 5 is a diagram showing a specific example of the polling command in the above embodiment.

FIG. 6 is a diagram showing a specific example of the polling response in the above embodiment.

FIG. 7 is a diagram showing a specific example of the selecting command in the above embodiment.

FIG. 8 is a diagram showing a specific example of the selecting response in the above embodiment.

According to the above embodiment, when the master issues a return request to the slave, the command CM2 (FIG. 3 (2)) is included in the signal received from the slave after this return request.
If bit 1 of the command CM2 is “1”, the master side can recognize that the signal is a return signal in response to polling, and if bit 2 of the command CM2 is “1”, the The master can recognize that the response signal is a response signal. Therefore, the master can easily and quickly determine that the signal received from the slave is a return signal corresponding to the request from the master.

In the above embodiment, the master side is the control board MCU in the fire receiver RE, the slave side is the additional board FLU for receiving the sensor, and the board SL for the smoke prevention equipment.
U, an additional board ROU for transfer output, but instead of setting such a combination, a fire receiver or repeater in the fire alarm facility is set as the master side, and a relay or terminal device in the fire alarm facility is set. The slave side may be set, and the in-panel address may be set as the address of the terminal device.

In the above embodiment, the transmission system in the fire alarm system is used.
May be applied to the field.

That is, in the above-described embodiment, in the transmission system in which different addresses are assigned to the plurality of slaves in advance and the master communicates with the plurality of slaves, a predetermined address is selected from among the plurality of slaves. The master side designates the slave side of the master side, and the master side requests a return signal to the slave side designated by the master side, and the slave side designated by the master side returns the slave side to the master side. And a response signal transmission step of transmitting a response signal indicating that the response signal is a response signal requested by the master side, wherein the response identification data is included in the return signal transmitted by the slave side. It is.

In this case, the return signal requesting step may be only a polling step for requesting the plurality of slaves to return the return signal in a predetermined order. It may be only a selecting step that requests only a predetermined slave side of the plurality of slave sides to return the return signal, and furthermore, a step of performing both polling and selecting. It may be.

Accordingly, the response identification data includes polling response identification data indicating that the response signal has been returned in response to the polling, and a select signal indicating that the response identification data has been returned in response to the selecting. And / or at least one of the response identification data.

In the case where the response identification data is transmitted in the step of transmitting the return signal, the self-address given to the slave transmitting the return signal may or may not be included in the return signal. Good.

Further, whether or not the return signal received by the master is the return signal requested by the master is determined according to the response identification data present in the return signal transmitted by the slave. The master decides.

Also, since response identification data indicating a response signal requested by the master is provided in the return signal by the slave, when the master issues a return request to the slave, The master can easily and quickly determine that the received signal is a return signal corresponding to the request from the master.

Further, in response to the response identification data which is present in the return signal transmitted by the slave side and indicates that the response signal has been requested by the master side, the return signal received by the master side corresponds to the return signal requested by the master side. Since the master side device determines whether or not the signal is a signal, when the master side issues a return request to the slave side, the master determines that the signal received from the slave side is a return signal corresponding to the request from the master side. The side can easily and quickly judge.

[0047]

According to the present invention, when the master issues a return request to the slave, the master can easily and quickly determine whether the signal received from the slave is the return signal requested by the master. It has the effect of being able to judge.

[Brief description of the drawings]

FIG. 1 is a block diagram of a fire alarm system FS1 according to an embodiment of the present invention.

FIG. 2 is a diagram showing a basic transmission format in the embodiment.

FIG. 3 is a detailed view of a character in a text format in the embodiment.

FIG. 4 is a diagram showing an example of data DT1 and DT2 when the master sends a simultaneous command in the embodiment.

FIG. 5 is a diagram showing a specific example of a polling command in the embodiment.

FIG. 6 is a diagram showing a specific example of a polling response in the embodiment.

FIG. 7 is a diagram showing a specific example of a selecting command in the embodiment.

FIG. 8 is a diagram showing a specific example of a selecting response in the embodiment.

[Explanation of symbols]

FS1: Fire alarm equipment, RE: Fire receiver, MCU: Control board as master side, FLU: Additional board for sensor reception as slave side, SLU: Smoke prevention equipment board as slave side, ROU ... Slave CM2 ... A command including response identification data indicating a response signal requested from the master side.

Claims (9)

[Claims] In a transmission system in which different addresses are assigned to a plurality of slaves and a master communicates with the plurality of slaves, a predetermined slave among the plurality of slaves is assigned to the master. A return signal requesting step in which the master side requests a return signal to the slave side specified by the master side and specified by the master side; and a return signal transmission in which the slave side specified by the master side transmits a return signal to the master side. And a response identification data indicating a response signal requested by the master side is included in the return signal transmitted by the slave side. 2. The method according to claim 1, wherein the return signal requesting step includes: polling for requesting the plurality of slaves to return the return signal in a predetermined order; A transmission method characterized in that the transmission method is at least one of selection and requesting only a predetermined slave side to return the return signal. 3. The polling response data according to claim 2, wherein the response identification data is polling response identification data indicating a response signal returned in response to the polling, and a response signal returned in response to the selecting. A transmission method characterized in that the transmission method is at least one of response information for selection which indicates that the data is present. 4. The method according to claim 1, wherein, in the return signal transmitting step, the return signal includes, along with the response identification data, a self-address given to a slave that transmits the return signal. Characteristic transmission method. 5. The response identification device according to claim 1, wherein the response signal present in the return signal transmitted by the slave side determines whether the return signal received by the master side is a return signal requested by the master side. A transmission method characterized in that the master side makes a decision according to data. 6. The apparatus according to claim 1, wherein the master side is a fire receiver or a repeater in the fire alarm system, and the slave side is a repeater or a terminal device in the fire alarm system. Transmission method. 7. The transmission system according to claim 1, wherein the master side and the slave side are provided in a fire receiver in a fire alarm system. 8. An address different from each other is assigned to each of the plurality of slaves, the master designates a predetermined slave from the plurality of slaves, and the slave designated by the master designates the slave. In a transmission system in which the master requests a return signal and the slave designated as the master sends a return signal to the master, the response identification data indicating that the response is a response signal requested from the master, A slave device provided in a return signal. 9. An address different from each other is assigned to each of the plurality of slaves, the master designates a predetermined slave from the plurality of slaves, and the slave designated by the master is assigned to the slave. In a transmission system in which a master requests a return signal and a slave designated as the master sends a return signal to the master, the slave exists in the return signal sent by the slave,
A master-side device that determines whether or not the return signal received by the master is a return signal requested by the master in response to response identification data indicating a response signal requested by the master.