JP3333266B2 - Transmission control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of data communication terminals, a plurality of remote controllers for operating the data communication terminals, and a remote centralized management for these data communication terminals and remote controllers. The present invention relates to a transmission control device in which a central control device is connected to a network.

[0002]

2. Description of the Related Art Conventionally, a plurality of data communication terminals, a plurality of remote controllers for operating these data communication terminals, and a central controller for centrally managing these data communication terminals and remote controllers remotely. A transmission control device in which the air conditioner is connected to a network is known. For example, a plurality of air conditioning units as a plurality of data communication terminal devices, a plurality of remote controllers that operate these air conditioning units, and an air conditioning unit and a remote controller There is an air-conditioning system in which a central control device for centrally managing the remote control is connected to a network.

FIG. 9 is a block diagram showing a configuration of a general air conditioning system.

As shown in FIG. 9, the air conditioning system has a plurality of outdoor units 1 as components of an air conditioning unit, and these outdoor units 1 are connected by a system-side transmission line 2. At least one indoor unit 3 is connected to each outdoor unit 1 by a unit-side transmission line 4, and each indoor unit 3 operates an air conditioning unit including the outdoor unit 1 and the indoor unit 3. Remote controller 5 is connected. A central control device 6 for centrally managing these air conditioning units and the remote controller 5 remotely is connected to the system-side transmission line 2.

[0005] Here, the unit side transmission line 4 is connected to the indoor unit 3.
And a transmission path for supplying a direct current from the outdoor unit 1 to the remote controller 5, and from the indoor unit 3 or the remote controller 5 to the outdoor unit 1 or from the outdoor unit 1 to the indoor unit 3 or the remote controller 5 side. It is used as a transmission path for a signal (transmission path signal).

FIG. 10 is a block diagram showing the configuration of the outdoor unit 1. As shown in FIG.

As shown in FIG. 10, the outdoor unit 1 includes a DC polarity determining means 7, a DC power supply 8, a low-pass filter 9, an overcurrent detecting means 10, a bidirectional waveform forming means 11, , Central processing means 12.

The DC polarity discriminating means 7 discriminates the polarity of the DC current superimposed on the system-side transmission line 2 which is a network, and outputs the result to the central processing means 12.

The DC power supply 8 superimposes and transmits a DC current on the system-side transmission line 2 and supplies the DC current to the indoor unit 3 and the remote controller 5 on the unit-side transmission line 4.

The low-pass filter 9 removes high-frequency components so that the DC current supplied from the DC power supply 8 does not affect the transmission path signal transmitted through the unit-side transmission path 4. That is, as is well known, when a DC current is generated from an AC power supply, some high-frequency components may enter the DC current, and this is removed.

When the DC current supplied from the DC power supply 8 exceeds a predetermined current value, the overcurrent detecting means 10
An overcurrent outflow is detected, and the detection result is output to the central processing unit 12.

The bidirectional waveform forming means 11 connects the system-side transmission line 2 and the unit-side transmission line 4, and transmits a transmission line signal from the system-side transmission line 2 to the unit-side transmission line 4; Further, a transmission path signal is transmitted from the unit side transmission path 4 to the system side transmission path 2. The bidirectional waveform forming means 11 also controls the direction in which the transmission path signal is transmitted according to the control signal input from the central processing means 12.
Specifically, when transmitting the transmission path signal from the unit-side transmission path 4 to the system-side transmission path 2, the bidirectional waveform forming unit 11 transmits the transmission path from the system-side transmission path 2 to the unit-side transmission path 4. The signal is sent in either direction. Further, the bidirectional waveform forming means 11 shapes both the signal waveforms transmitted to the system side and the unit side to prevent the transmission distance from being shortened by being deformed and attenuated by the transmission path.

The central processing means 12 includes a DC polarity discriminating means 7
The result of the polarity determination is output to the bidirectional waveform forming means 11 so that the polarity of the signal to be transmitted matches the polarity determined by the above. The central processing means 12 controls the power supply to be stopped when the overcurrent detection state is detected by the overcurrent detection means 10.

Next, the operation will be described.

The DC polarity discriminating means 7 discriminates the polarity of the DC current superimposed on the system-side transmission line 2 network-connected to the central controller 6, and outputs the discrimination result to the central processing means 12. The central processing means 12 controls the bidirectional waveform forming means 11 so as to match the signal polarity based on the input discrimination result, and outputs a control signal for switching the transmission direction of the transmission path signal to the bidirectional waveform shaping means. 11 is output.

The central processing means 12 is provided to prevent the DC power supply 8 for supplying a DC current to the unit-side transmission line 4 from failing due to an overcurrent outflow due to a short-circuit of the unit-side transmission line 4 or the like. When the overcurrent outflow state is detected by the detecting means 10 and the overcurrent is detected, the power supply from the DC power supply 8 is stopped.

FIG. 11 is a block diagram showing the configuration of a conventional simple random number generation system described in Japanese Patent Application Laid-Open No. 62-14233.

The simple random number generation system has a microcomputer 13, a bidirectional bus driver 15 is connected to the microcomputer 13 via a data bus 14, and an I / O address via an address bus 16. The decoder 17 is connected. Further, a programmable interval timer 19 is connected to the bidirectional bus driver 15 via a data bus 18. A read / write signal 100 from the microcomputer 13 is connected to a direction terminal of the bidirectional bus driver 15 and a read / write terminal of the programmable interval timer 19. The address signal from the microcomputer 13 is I / O
Chip select control signal 1 by address decoder 17
01 and converted to programmable interval timer 1
9 is input to the chip select.

Next, the operation will be described.

The address signal from the microcomputer 13 is always decoded by the I / O address decoder 17, and the chip select control signal 101 of the programmable interval timer 19 becomes effective only when an IN / OUT instruction to the programmable interval timer 19 is executed. The data on the data buses 14 and 18 is transferred by the read / write signal 100 from the microcomputer 13 to the bidirectional bus driver 1.
5, the microcomputer 13 can read and write the programmable interval timer 19. Once the count value of the programmable interval timer 19 set by the microcomputer 13 is set by the microcomputer 13, the value from the set value to 0 is cyclically and repeatedly counted. The count value is read by the microcomputer 13, and the read count value is passed as a random number to a random number generation processing unit inside the microcomputer 13.

[0021]

Since the conventional transmission control device is configured as described above, even one of the outdoor unit 1, the indoor unit 3, or the remote controller 5 is connected to the system-side transmission path 2. When an abnormality affecting the transmission (for example, a transmission signal continues to be output to the transmission line due to a failure in the transmission circuit and other components cannot be transmitted) occurs, or the central control device 6 connected to the system-side transmission line 2 fails. In this case, there is a problem that even a normal device connected to the network cannot operate.

Further, in the above-described conventional random number generation system, a random number is generated by counting a count clock generated from an oscillation circuit of a programmable interval timer. There is a problem that the number is converged to a constant value as a random value. Furthermore, since the random number generating circuit is composed of a plurality of components, there is a problem that the circuit does not operate normally due to a defect such as disconnection, and the reliability is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In the case where an abnormality occurred on the unit side affects the system side, or conversely, an abnormality occurred on the system side occurs on the unit side. When the transmission control device is affected, the transmission line on the unit side and the transmission line on the system side are cut off to obtain a transmission control device capable of protecting the device. It is an object of the present invention to obtain a random number generation system that can generate a random number at random by using the time counting error.

[0024]

According to a first aspect of the present invention, there is provided a transmission control apparatus comprising: a plurality of data communication terminals; a plurality of remote controllers for operating these data communication terminals; In a transmission control device in a remote control system in which a device and a central control device for centrally managing a remote controller are remotely connected, a direct current is supplied to a local transmission path to which the plurality of data communication terminal devices and the remote controller are connected. A DC power supply to be supplied, a disconnection unit that disconnects the system-side transmission line connected to the network and the local-side transmission line, and an abnormality occurring in the data communication terminal device and the remote controller connected to the local-side transmission line. Another normal data communication terminal connected to the network, When the controller and the system-side transmission line are affected, or when an abnormality that occurs in the system-side transmission line connected to the network affects the normal data communication terminal device and the remote controller connected to the local-side transmission line, the system side Central processing means for controlling the blocking means so as to block the transmission path and the local transmission path.

According to a second aspect of the present invention, there is provided a transmission control apparatus comprising: a plurality of data communication terminal apparatuses; a plurality of remote controllers for operating the data communication terminal apparatuses; In a transmission control device in a remote control system in which a central control device for centralized management is connected to a network, detection means for detecting a polarity of a direct current superimposed on a system-side transmission line connected to the network, and the plurality of data communication terminal devices A DC power supply for supplying a DC current to a local transmission line to which a remote controller is connected; a polarity reversing unit for reversing the polarity of the DC current supplied from the DC power supply; Overcurrent detection means for detecting overcurrent outflow of direct current, and the network connection Blocking means for cutting off the system-side transmission line and the local-side transmission line, and the polarity of the DC current supplied from the DC power supply when the detection means detects that DC current is superimposed on the system-side transmission line. The polarity inverting means is controlled so as to invert, and the interrupting means is short-circuited, or when the detecting means detects that no DC current is superimposed on the system-side transmission line, the interrupting means is short-circuited. When the overcurrent detection means detects an overcurrent outflow of the DC current supplied from the DC power supply, the interruption means is opened and the polarity is set so as to reverse the polarity of the DC current supplied from the DC power supply. Central processing means for controlling the inversion means, short-circuiting the interruption means again, and making the system-side transmission path superimposed DC current polarity and the local-side transmission path superimposed DC current polarity the same; Characterized in that it comprises.

According to a third aspect of the present invention, there is provided a transmission control apparatus comprising: a plurality of data communication terminal devices; a plurality of remote controllers for operating the data communication terminal devices; In a transmission control device in a remote control system in which a central control device for centralized management is connected to a network, detection means for detecting a polarity of a direct current superimposed on a system-side transmission line connected to the network, and the plurality of data communication terminal devices A DC power supply for supplying a DC current to a local transmission line to which a remote controller is connected; a polarity reversing unit for reversing the polarity of the DC current supplied from the DC power supply; Overcurrent detection means for detecting overcurrent outflow of direct current, and the network connection Blocking means for blocking the system-side transmission path and the local-side transmission path, random number generation means for generating a random number, timing means for starting a predetermined time by a timing instruction, When it is detected that the current is superimposed, the polarity inversion means is controlled so as to invert the polarity of the DC current supplied from the DC power supply device, and the interruption means is short-circuited, or the detection means detects the system side. When it is detected that no direct current is superimposed on the transmission line, a random number is generated by random number generation means, and the random number value is timed by time counting means. The presence or absence of DC current superimposed on the path, and when the detection means detects that DC current is not superimposed on the system-side transmission path, And fault, if it is detected that the direct current is superimposed on the system side transmission line by the detecting means, controls the polarity inverting means to invert the polarity of the direct current supplied from the DC power supply device,
And, when the interruption means is short-circuited, and when the overcurrent detection means detects an overcurrent outflow of the DC current supplied from the DC power supply, the interruption means is opened and the DC current supplied from the DC power supply is The polarity inversion means is controlled to invert the polarity, and a random number is generated by the random number generation means,
When the random number value is counted by the timing means, and when the predetermined time is counted, the detection means detects whether or not the DC current is superimposed on the system-side transmission line, and the detection means detects that the DC current is superimposed on the system-side transmission path. If it is detected that the DC current is not present, the blocking means is short-circuited, and if the detection means detects that the DC current is superimposed on the system-side transmission line, the polarity of the DC current supplied from the DC power supply is inverted. To control the polarity inversion means, and short-circuit the interruption means,
And a central processing unit for controlling the polarity of the superimposed DC current so as not to collide with random numbers in the distributed power supply system.

According to a fourth aspect of the present invention, in the transmission control apparatus according to the third aspect, the random number generating means has a function of using the first system clock oscillator as a time reference time. And a second microcomputer having a function of using the second system clock oscillator as a reference time for clocking. The control signal output from the first microcomputer to the second microcomputer causes the second microcomputer to The time until the response signal is returned to the first microcomputer is measured by the first microcomputer, and the counted value is output as a random number.

According to a fifth aspect of the present invention, in the transmission control apparatus according to the third aspect, the random number generation means in the transmission control apparatus according to the third aspect includes a microcomputer having a function of using a system clock oscillator as a reference time for clocking; A timing circuit consisting of an integrating circuit that starts timing under the control of, and outputs a response after the timing is completed.The microcomputer outputs a timing start control signal to the timing means, and the timing means outputs a response signal to the microcomputer. The microcomputer measures the time until the time is reached, and outputs the counted value as a random number.

[0029]

According to the first aspect of the present invention, there is provided a transmission control apparatus comprising:
When an abnormality occurred in the data communication terminal device and the remote controller connected to the local transmission line affects another normal data communication terminal device, the remote controller and the system transmission line connected to the network, or When an abnormality that occurs in the connected system-side transmission line affects the normal data communication terminal device and the remote controller connected to the local-side transmission line, the central transmission line is cut off so that the system-side transmission line and the local-side transmission line are shut off. The interrupting means is controlled by the processing means to interrupt the system-side transmission line and the local-side transmission line.

In the transmission control device according to the second aspect of the present invention, when the detection means detects that the DC current is superimposed on the transmission line on the system side, the polarity of the DC current supplied from the DC power supply is detected by the central processing means. Controlling the polarity reversing means so as to invert, and short-circuiting the blocking means,
Alternatively, when the detection means detects that the DC current is not superimposed on the system-side transmission line, the cutoff means is short-circuited, and the overcurrent detection means detects the overcurrent outflow of the DC current supplied from the DC power supply. Upon detection, the interrupting means is opened, the polarity inverting means is controlled to invert the polarity of the DC current supplied from the DC power supply, the interrupting means is short-circuited again, and Make the polarity of the side transmission line superimposed DC current the same.

In the transmission control device according to the third aspect of the present invention, when the detection means detects that the DC current is superimposed on the transmission line on the system side, the polarity of the DC current supplied from the DC power supply device is detected by the central processing means. When the polarity inverting means is controlled so as to invert, and the interrupting means is short-circuited, or when the detecting means detects that no DC current is superimposed on the system-side transmission line, a random number is generated by the random number generating means. When the random number is timed by the time-measuring means and timed for a predetermined time, the presence / absence of superimposition of DC current on the system-side transmission line is detected again by the detecting means,
When the detecting means detects that DC current is not superimposed on the system-side transmission line, the cutoff means is short-circuited, and when the detecting means detects that DC current is superimposed on the system-side transmission line, the DC power supply device Controlling the polarity inversion means to invert the polarity of the DC current supplied from the
When the interruption means is short-circuited, and when the overcurrent detection means detects an overcurrent outflow of the DC current supplied from the DC power supply, the interruption means is opened and the polarity of the DC current supplied from the DC power supply is The polarity inverting means is controlled so as to invert, the random number is generated by the random number generating means, the random number value is timed by the time measuring means, and when the predetermined time is measured, the DC current is supplied to the system side transmission line by the detecting means. If the presence or absence of superimposition is detected, and if the detection means detects that DC current is not superimposed on the system-side transmission line, the cut-off means is short-circuited, and the DC current is superimposed on the system-side transmission line by the detection means. Is detected, the polarity inverting means is controlled so as to invert the polarity of the DC current supplied from the DC power supply device, and the interrupting means is short-circuited. It is controlled so as not to collide the polarity of the superimposed DC current at random.

According to a fourth aspect of the present invention, in the transmission control apparatus according to the third aspect, the random number generating means outputs the second microcomputer from a control signal output from the first microcomputer to the second microcomputer. The first microcomputer measures the time until the response signal is returned to the first microcomputer, and uses the counted value as a random number.

According to a fifth aspect of the present invention, there is provided the transmission control apparatus according to the third aspect, wherein the random number generating means outputs a timing start control signal from the microcomputer to the timing means, and the timing means outputs the timing control signal to the microcomputer. The time until the response signal is output is measured by the microcomputer, and the counted value is used as a random number.

[0034]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. FIG.
1 is a block diagram illustrating a configuration of a general transmission control device. As shown in FIG. 9, the transmission control device has a plurality of outdoor units 1 as components of an air conditioning unit, and these outdoor units 1 are connected by a system-side transmission line 2. Each outdoor unit 1 has at least one
Indoor units 3 are connected by a unit-side transmission path 4, and each of the indoor units 3 has a remote controller 5 that operates an air conditioning unit including the outdoor unit 1 and the indoor unit 3.
Is connected. The system-side transmission path 2 includes these air conditioning units and the remote controller 5.
A central control device 6 for centrally managing the remote control is connected.

The central controller 6 and the outdoor unit 1 transmit and receive transmission line signals for centralized management and the like via the system-side transmission line 2. Each outdoor unit 1 is connected to the unit-side transmission line 4.
, The transmission path signal of the operating state and the like is received, and the transmission path signal is transmitted through the system-side transmission path 2. Here, the unit-side transmission path 4 and the system-side transmission path 2 transmit a transmission path signal and supply power to each unit. Here, power is supplied to the outdoor unit 1 or the indoor unit 3
However, when power is supplied from a plurality of outdoor units 1 and indoor units 3 at the same time, the polarity of the DC current to be supplied must be matched. Therefore, when the power is turned on, the outdoor unit 1 and the indoor unit 3 of the present embodiment detect the polarity of the DC current superimposed on the unit-side transmission line 4 and the system-side transmission line 2, and detect the polarity. Start the combined power supply.

When the power of the plurality of outdoor units 1 and the indoor units 3 is turned on at substantially the same time, one of them starts supplying power first, and the other supplies power in accordance with the polarity of the supplied direct current. To avoid polarity “collisions”. At this time, in order to select the outdoor unit 1 or the indoor unit 3 to start power supply first, a random number is generated in each of the outdoor unit 1 and the indoor unit 3, and the apparatus waits for a time corresponding to the value indicated by the random number. Then, each of the outdoor unit 1 and the indoor unit 3 starts power supply. Thereby, for example, the outdoor unit 1 that has generated the smallest random number
Alternatively, the indoor unit 3 starts power supply first. In the following description, the specific operation of the outdoor unit 1 will be described as an example.

Further, in this embodiment, the system-side transmission line 2 and the unit-side transmission line 4 both transmit transmission line signals transmitted by one outdoor unit 1, indoor unit 3, or central control unit 6. While one of them is transmitting the channel signal, the other cannot transmit the channel signal. Therefore, if any of the outdoor unit 1, the indoor unit 3, or the central control unit 6 continues to transmit the transmission path signal due to the communication abnormality, the other outdoor unit 1, the indoor unit 3, or the central control unit 6 transmits the transmission path signal. Cannot be sent. Therefore,
In the outdoor unit 1, when an abnormality in which the transmission path signal continues to be transmitted occurs on the system side transmission path 2 side, this is disconnected to enable transmission and reception of the transmission path signal via the unit side transmission path 4.

FIG. 1 is a block diagram showing the configuration of an outdoor unit 1 according to the first to third aspects of the present invention.
As shown in detail in FIG. 1, the outdoor unit 1 includes a blocking unit 20 for blocking communication between the system-side transmission line 2 and the unit-side transmission line 4, a random number generating unit 21 for generating a random number, and a network. DC polarity determining means 7 for determining the polarity of the DC current superimposed on the connected system-side transmission line 2, DC power supply device 8 for supplying DC current to the unit-side transmission line 4, and superimposed on the unit-side transmission line 4 A low-pass filter 9 that cuts high-frequency components so that the signal is not affected by the DC power supply 8, a polarity inversion unit 22 that inverts the polarity of the DC current supplied from the DC power supply 8, and a signal that is supplied from the DC power supply 8. Overcurrent detection means 10 for detecting overcurrent outflow of DC current, the result of determination by DC polarity determination means 7, a random number generated by random number generation means 21, and detection by overcurrent detection means 10. The central processing unit 1 for controlling the blocking means 20 and the polarity inverting means 22 based on the overcurrent flowing out state of being
2 is provided.

The shut-off means 20 for shutting off the transmission line 2 on the system side and the transmission line 4 on the unit side can be specifically configured using a relay.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

In this embodiment, the system-side transmission path 2
It is necessary to match the polarities of the signals transmitted to the transmission lines 2 and 4 so that the signal of the transmission line 4 and the signal of the unit side transmission line 4 are not attenuated by collision. The signal polarity is determined by the polarity of the DC current superimposed on the transmission lines 2 and 4. For example, if it is determined in advance that the first start bit is transmitted to the positive side of the DC power supply 8, signal collision can be avoided. The operation of matching the polarity of the DC current supplied by each outdoor unit 1 will be described below. When the power of the outdoor unit 1 is turned on and the system reset is performed in the central processing unit 12, the processing shown in FIG. 2 is started.

First, it is not known whether or not a DC current is superimposed on the system-side transmission line 2 (when the power is first turned on, the DC current is not yet superimposed on the transmission line). The transmission line 2 on the system side by means 20
And the unit-side transmission path 4 are cut off (step 1). Then, the DC polarity discriminating means 7 discriminates the polarity of the DC current superimposed on the system-side transmission line 2 network-connected to the central control device 6 (step 2), and the discrimination result (polarity is forward, reverse) Or no DC current is superimposed) to the central processing means 12.

The central processing means 12 generates a random number by the random number generation means 21 (step 4) when the polarity of the input discrimination result is in the reverse direction or when no DC current is superimposed (step 4). The random number obtained by the generation unit 21 is input to the central processing unit 12, and it is determined whether the random number generation time has elapsed (step 5). If the random number generation time has elapsed, the DC polarity determination means 7 again determines the polarity of the DC current superimposed on the system-side transmission line 2 network-connected to the central control device 6 (step 6).
The result of the determination (polarity is forward, reverse, or no direct current is superimposed) is output to the central processing unit 12. The reason why the polarity is determined again here is that while waiting for the random number generation time to elapse in step 5,
When the power supply of the other outdoor unit 1 is turned on and the supply of the direct current is started, or when the polarity is determined in step 2, even though the power supply of the other outdoor unit 1 is already turned on, This is a countermeasure for preventing the supply of the current of the opposite polarity when the polarity determination cannot be performed because the power supply device that supplies the DC current is delayed.

Further, if the input discrimination result indicates that the polarity is reverse or no DC current is superimposed (step 7), the central processing means 12 judges that power supply has not started except for itself, and shuts off. The transmission line 2 on the system side by means 20
Is connected to the unit-side transmission line 4, and a DC current is supplied from the DC power supply 8 (step 8). Then, it is determined by the overcurrent detecting means 10 whether or not an overcurrent has occurred, that is, the polarity of the supplied DC current is
It is determined whether or not the polarity of the direct current supplied to the system-side transmission line 2 matches the polarity of the direct current supplied to the system-side transmission line 2 (step 9). If not, the system-side transmission line 2 and the unit-side transmission line 4 are cut off by the cut-off means 20 (step 10). Such a case may occur when a plurality of outdoor units 1 start supplying DC current at the same time.

Then, the central processing means 12 inverts the polarity of the DC current supplied to the transmission line by the polarity inversion means 22 (step 11). Further, a random number is generated by the random number generation means 21 (step 12), and the random number obtained by the random number generation means 21 is input to the central processing means 12, and it is determined whether or not the random number generation time has elapsed (step 13). If the random number generation time has elapsed, the DC polarity determination means 7 again determines the polarity of the DC current superimposed on the system-side transmission line 2 network-connected to the central control device 6 (step 1).
4), and outputs the determination result (polarity is forward, reverse, or no direct current is superimposed) to the central processing unit 12. Further, when the input discrimination result indicates that the polarity is reverse or the direct current is not superimposed (step 15), the central processing means 12 determines that power supply has not been started except for itself and the transmission line cutoff means 20 And a DC current is supplied from the DC power supply 8 (step 16).

Then, the outdoor unit 1 starts processing related to the transmission path signal, and processes and controls the operation from the unit-side transmission path 4 or the system-side transmission path 2 including the central management unit 6 (step 17). Then, whether an unrecoverable abnormality has occurred on the system side where the plurality of indoor units 3, the remote controller 5, or the central controller 6 and the plurality of outdoor units 1 connected to the unit side transmission path 4 are connected. (Step 18), and if an irrecoverable abnormality occurs,
The system-side transmission line 2 and the unit-side transmission line 4 are separated by the cutoff means 20 (step 19), thereby realizing system down and risk dispersion of only a part. If no unrecoverable abnormality occurs, the air conditioner control process (step 1)
Repeat step 7).

If it is determined in steps 3, 7 and 15 that the polarity is in the forward direction, the direct current is supplied to the system-side transmission line 2 so that the central processing means 12 performs the polarity inversion. The means 22 inverts the polarity of the DC current supplied to the transmission line (step 2).
0), the relay of the transmission line cutoff means 20 is opened, a DC current is supplied from the DC power supply 8 (step 21), and the processing operation of step 17 is performed.

Embodiment 2 FIG. FIG. 3 is a block diagram showing a configuration of a random number generation system of the transmission control device according to the fourth aspect of the present invention. This random number generation system is used for the random number generation means 21 in the first embodiment.

The random number generation system comprises a first microcomputer 24 having a function of using the first system clock oscillator 23 as a reference time for clocking, and a second system clock oscillator 2
And a second microcomputer 26 having a function of setting 5 as a reference time for clocking. The control signal 102 output from the first microcomputer 24 to the second microcomputer 26 causes the second microcomputer 26 to The first microcomputer 24 measures the time until the response signal 103 is returned to the microcomputer 24, and has software that uses the counted value as a random number.

Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS.

The first microcomputer 24 and the second microcomputer 2
6. When the power is turned on, the program is initially started by a system reset. Then, the first microcomputer 24 performs setting to use the system clock generated by the first system clock oscillator 23 as a time count clock (step 21). then,
Control signal 102 for causing second microcomputer 26 to start timing
Is output (step 22).

In addition, the counting of the time counting clock is started in order to time the time of the time counting end response signal 103 from the second microcomputer 26 (step 23). Then, it is determined whether or not there is a response signal 103 from the second microcomputer 26 (step 24). If there is the response signal 103, the time count value is read (step 25), and the read value is set as a random number value. (Step 2
6).

In step 24, if there is no response signal 103, the time counting is continued.

On the other hand, the operation of the second microcomputer 26 is as shown in FIG.
As shown in the flowchart, upon receiving the timing start signal 102 from the first microcomputer 24, an initial process is performed (step 27), and a timing end response signal 103 is output to the first microcomputer 24 (step 28).

Embodiment 3 FIG. FIG. 6 is a block diagram showing a configuration of a random number generating system of the transmission control device according to the fifth aspect of the present invention. This random number generation system is used for the random number generation means 21 in the first embodiment.

The random number generation system includes a microcomputer 24 having a function of using the system clock oscillator 23 as a reference time for time measurement, and an integrating circuit which starts time measurement under the control of the microcomputer 24 and outputs a response 104 after the time measurement is completed. A time counting circuit 27.
The microcomputer 24 outputs a clock start control signal 102, and the microcomputer 24 measures the time until the timer 27 outputs the response signal 104 to the microcomputer 24, and has software that uses the counted value as a random number. In addition, the timing circuit 27
Is a PNP transistor 28, a resistor 29, a capacitor 3
0.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

When the microcomputer 24 is turned on, the program is initially started by a system reset.
Then, the microcomputer 24 includes the system clock oscillator 23
Is set to use as the time count clock based on the system clock generated by the operation (step 31).

Then, a control signal 102 for starting the clocking is output to the clocking circuit 27 (step 32), and the counting of the clocking clock is started to count the time of the clocking end response signal 104 from the clocking circuit 27. (Step 33). Then, the response signal 1 from the timing circuit 26
04 (step 34), the response signal 1
If there is 04, the value of the time count is read (step 35), and the read value is set as a random value (step 36).

In step 24, if there is no response signal 104, the time counting is continued.

When the timekeeping start signal 102 from the microcomputer 24 has the output waveform shown in FIG. 7A, the PNP transistor 28 turns on when the timekeeping start output 102 becomes 0V. Then, a voltage is applied to the resistor 29 and the capacitor 30. When the voltage is applied to the time-measuring means 27 in which the output A of the integrating circuit constituted by the resistor 29 and the capacitor 30 is a response signal 104 to the microcomputer 24 of the time-measuring means 27, the voltage at the point A of the output of the integrating circuit is reduced to VA. , V is represented by the following equation: VA = V (1−ε).

FIG. 7B shows the relationship between the voltage VA and the time.
Shown in

As described above, when the time counting start signal 102 is input, the time counting means 27 changes the response signal 104 to the state shown in FIG.
The microcomputer 24 measures the time T1 from turning on the timing start signal 102 until the input of the response signal 104 changes from "L" to "H", and generates the counted value as a random number. I do.

[0064]

As described above, according to the first aspect of the present invention, an abnormality that occurs in the data communication terminal device connected to the local transmission line and the remote controller causes other normal data to be connected to the network. Communication terminal device,
When the remote controller and the system-side transmission line are affected, or when an abnormality that occurs in the system-side transmission line connected to the network affects the normal data communication terminal device and the remote controller connected to the local-side transmission line. The central processing means controls the shut-off means so as to cut off the system-side transmission path and the local-side transmission path, and shuts off the system-side transmission path and the local-side transmission path. Even when an abnormality that cannot return to the transmission path or the local transmission path occurs, the system operation or the data communication operation can be performed without affecting other normal devices.

According to the second aspect of the present invention, when the detecting means detects that DC current is superimposed on the transmission line on the system side, the central processing means reverses the polarity of the DC current supplied from the DC power supply. If the detecting means detects that no DC current is superimposed on the transmission line on the system side, the breaking means is short-circuited, and the polarity inverting means is short-circuited. When the overcurrent outflow of the DC current supplied from the DC power supply is detected by the current detection means, the interruption means is opened, and the polarity inversion means is controlled so as to invert the polarity of the DC current supplied from the DC power supply. The short-circuiting means is again short-circuited so that the system-side transmission line superimposed DC current polarity is the same as the local-side transmission line superimposed DC current polarity. To match the polarity of the sending passage and delivery signal of the system side transmission path, signal attenuation can be prevented caused by signal collision.

In the transmission control device according to the third aspect of the present invention, when the detection means detects that the DC current is superimposed on the transmission line on the system side, the polarity of the DC current supplied from the DC power supply device is detected by the central processing means. Controlling the polarity reversing means so as to invert, and short-circuiting the blocking means,
Alternatively, when the detection means detects that no DC current is superimposed on the system-side transmission line, a random number is generated by a random number generation means, the random number value is counted by a timer, and when a predetermined time is counted, the random number is again measured. The detecting means detects the presence or absence of DC current superimposed on the transmission line on the system side, and the detecting means detects that the DC current is not superimposed on the transmission line on the system side. When detecting that a DC current is superimposed on the transmission line, the controller controls the polarity inversion means to invert the polarity of the DC current supplied from the DC power supply device, and short-circuits the cutoff means, and When the detecting means detects an overcurrent outflow of the DC current supplied from the DC power supply, the breaking means is opened, and the DC current supplied from the DC power supply is released. The polarity inversion means is controlled so as to invert the polarity of the signal, a random number is generated by a random number generation means, the random number value is counted by a time counting means, and when a predetermined time is counted, the detection means directs the DC to the system side transmission path. When the presence or absence of the current is detected and the detection means detects that the DC current is not superimposed on the system-side transmission line, the interruption means is short-circuited, and the detection means superimposes the DC current on the system-side transmission line. When detecting that the DC power supplied from the DC power supply device is inverted, the polarity inverting means is controlled to reverse the polarity, and the interrupting means is short-circuited, and the polarity of the superimposed DC current is changed by a random number in the distributed power supply system. Since the system is controlled so as not to cause collision, even if an abnormality that cannot be returned to the system-side transmission line or the local-side transmission line by the shutoff means occurs, System operation or data communication operation without affecting other devices.In addition, by matching the polarities of the transmission signals on the local transmission line and the system transmission line, signal attenuation due to signal collision occurs. Can be prevented from occurring.

According to a fourth aspect of the present invention, in the transmission control device according to the third aspect, the random number generating means determines that the second microcomputer is configured to output the first microcomputer to the second microcomputer based on a control signal output from the first microcomputer to the second microcomputer. The time until the response signal is returned to the microcomputer is measured by the first microcomputer, and the counted value is used as a random number, so that a random number with high randomness can be generated and the circuit can be simplified. As a result, the probability of occurrence of a defect such as disconnection can be reduced, and reliability can be improved.

According to a fifth aspect of the present invention, in the transmission control device according to the third aspect, the random number generating means outputs a timing start control signal from the microcomputer to the timing means, and the timing means outputs a response signal to the microcomputer. Microcomputer measures the time until it is done, and the configured count value is used as a random number, so random numbers with high randomness can be generated, and the circuit is simplified, causing problems such as disconnection. Probability can be reduced and reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an outdoor unit 1 according to the first to third aspects of the present invention.

FIG. 2 is a flowchart showing the operation of the invention described in claims 1 to 3;

FIG. 3 is a block diagram showing a configuration of a random number generation system of the transmission control device according to the invention described in claim 4;

FIG. 4 is a flowchart showing the operation of the invention described in claim 4;

FIG. 5 is a flowchart showing the operation of the invention according to claim 4;

FIG. 6 is a block diagram showing a configuration of a random number generation system of the transmission control device according to the fifth aspect of the present invention.

FIG. 7 is a time chart showing the operation of the time measuring means of the random number generation system of the transmission control device according to the fifth aspect of the present invention.

FIG. 8 is a flowchart showing an operation of the random number generation system of the transmission control device according to the invention of claim 5;

FIG. 9 is a block diagram illustrating a configuration of a general air conditioner system.

FIG. 10 is a block diagram showing a configuration of a conventional outdoor unit.

FIG. 11 is a block diagram showing a configuration of a conventional simple random number generation system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 System side transmission line 3 Indoor unit 4 Unit side transmission line 5 Remote control 6 Central control unit 7 DC polarity discrimination means 8 DC power supply 10 Overcurrent detection means 12 Central processing means 20 Transmission line cutoff means 21 Random number generation means 22 Polarity Inverting Means 23, 25 System Clock Oscillator 24, 26 Microcomputer 27 Timekeeping Means 28 Transistor 29 Resistor 30 Capacitor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04Q 9/00 F24F 11/02

Claims (5)

(57) [Claims] 1. A network comprising: a plurality of data communication terminal devices; a plurality of remote controllers operating the data communication terminal devices; and a central control device for centrally managing the data communication terminal devices and the remote controllers. A transmission control device in the connected remote control system, a DC power supply device for supplying a DC current to a local transmission line to which the plurality of data communication terminal devices and the remote controller are connected; Blocking means for blocking the local transmission path; and another normal data communication terminal apparatus, remote controller, and system in which an abnormality occurred in the data communication terminal apparatus and the remote controller connected to the local transmission path is connected to the network. If it affects the side transmission path, Alternatively, when an abnormality occurred in the network-side transmission line affects the normal data communication terminal device and the remote controller connected to the local-side transmission line, the system-side transmission line and the local-side transmission line are shut off. And a central processing means for controlling the blocking means. 2. A network comprising: a plurality of data communication terminal devices; a plurality of remote controllers for operating the data communication terminal devices; and a central control device for centrally managing the data communication terminal devices and the remote controllers remotely. A transmission control device in a connected remote control system, comprising: detection means for detecting the polarity of a direct current superimposed on a network-connected system-side transmission line; and a local-side transmission line to which the plurality of data communication terminal devices and a remote controller are connected. A DC power supply that supplies a DC current to the DC power supply; a polarity inversion unit that reverses the polarity of the DC current supplied from the DC power supply; and an overcurrent that detects an overcurrent outflow of the DC current supplied from the DC power supply. Detecting means; a system-side transmission line connected to the network and a local-side transmission line. And a polarity inverting means for inverting the polarity of the DC current supplied from the DC power supply, when the detecting means detects that DC current is superimposed on the system-side transmission line. Control, and short-circuits the shut-off means, or short-circuits the shut-off means if the detection means detects that DC current is not superimposed on the system-side transmission line, and sets a DC power supply by the overcurrent detection means. When the overcurrent outflow of the DC current supplied from the device is detected, the interrupting means is opened, the polarity inverting means is controlled so as to invert the polarity of the DC current supplied from the DC power supply, and the interrupting means is again activated. A central processing means for short-circuiting to make the system-side transmission line superimposed DC current polarity the same as the local-side transmission line superimposed DC current polarity. . 3. A network comprising: a plurality of data communication terminal devices; a plurality of remote controllers for operating the data communication terminal devices; and a central control device for centrally managing the data communication terminal devices and the remote controllers remotely. A transmission control device in a connected remote control system, comprising: detection means for detecting the polarity of a direct current superimposed on a network-connected system-side transmission line; and a local-side transmission line to which the plurality of data communication terminal devices and a remote controller are connected. A DC power supply that supplies a DC current to the DC power supply; a polarity inversion unit that reverses the polarity of the DC current supplied from the DC power supply; and an overcurrent that detects an overcurrent outflow of the DC current supplied from the DC power supply. Detecting means; a system-side transmission line connected to the network and a local-side transmission line. Blocking means for blocking a path, random number generating means for generating a random number, timing means for starting a predetermined time in response to a timing instruction, and detecting that a direct current is superimposed on the system side transmission path by the detecting means. In this case, the polarity inverting means is controlled to invert the polarity of the DC current supplied from the DC power supply device, and the interrupting means is short-circuited, or the DC current is superimposed on the system-side transmission line by the detecting means. When it is detected that there is no direct current, the random number is generated by the random number generating means, the random number value is timed by the time measuring means, and when the predetermined time is measured, the detecting means again determines whether or not DC current is superimposed on the system side transmission line. When the detection means detects that the DC current is not superimposed on the transmission line on the system side, the interruption means is short-circuited and the transmission means on the system side is detected by the detection means. When it is detected that the DC current is superimposed on the path, the polarity inverting means is controlled so as to invert the polarity of the DC current supplied from the DC power supply device, and the breaking means is short-circuited, and the overcurrent When the detection means detects an overcurrent outflow of the DC current supplied from the DC power supply, the blocking means is opened, and the polarity inversion means is controlled so as to invert the polarity of the DC current supplied from the DC power supply. A random number is generated by a random number generating means, the random number value is measured by a time measuring means, and when a predetermined time is measured, a detecting means detects whether or not DC current is superimposed on a system side transmission line, and a detecting means detects a system. When it is detected that the direct current is not superimposed on the side transmission line, the interruption means is short-circuited, and the detection unit detects that the direct current is superimposed on the system side transmission line. In the case, the polarity inversion means is controlled so as to invert the polarity of the DC current supplied from the DC power supply, and the cutoff means is short-circuited so that the polarity of the superimposed DC current does not collide with a random number in the distributed power supply system. And a central processing unit for controlling the transmission. 4. A first random number generating means having a function of using a first system clock oscillator as a reference time for clocking.
And a second microcomputer having a function of using the second system clock oscillator as a reference time for clocking. The second microcomputer is configured to output a control signal from the first microcomputer to the second microcomputer. 4. The transmission control device according to claim 3, wherein a time until the response signal is returned to the first microcomputer is measured by the first microcomputer, and the counted value is output as a random number. 5. The random number generating means includes a microcomputer having a function of using a system clock oscillator as a reference time for clocking, and an integrating circuit for starting clocking under the control of the microcomputer and outputting a response after the clocking is completed. The microcomputer outputs a timing start control signal from the microcomputer to the timing means, measures the time until the timing means outputs a response signal to the microcomputer, and outputs the counted value as a random number. 4. The transmission according to claim 3, wherein
Transmission control device .