JPH082036B2 - Transmission control device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission control device that uses a commercial power line as a bidirectional transmission communication path and controls on / off a plurality of loads by remote control.

2. Description of the Related Art As such a transmission control device, as shown in FIGS.
The structure shown in the figure was used.

In the figure, 1 is a control terminal for remotely controlling on / off of loads 6-9 connected to a power line 10 through dedicated adapters 2-5, and 2-5 are self-received by receiving a signal sent from the control terminal. Adapters for turning on / off the loads 6 to 9 connected to the control terminal and returning the control result to the control terminal 1, and 6 to 9 are loads of electric devices and the like. Reference numeral 10 denotes a commercial 100V power line (hereinafter referred to as a power line) that is also used as a bidirectional transmission communication path. The control terminal 1 is a user who wants to turn on / off his / her own station address setting means 11 for setting the own station address, other station address setting means 12-15 for setting the other station address, and a plurality of connected loads by remote control. Operation switches 16 to 19 operated by
The display means 20 to 23 indicate that the loads 6 to 9 are controlled as a result of the operation Nos. 19 to 19. The display means 20 to 23 also have a function of displaying the state change of the loads 6 to 9 when they are manually turned on and off, not by remote control. In addition, as a matter of course, the other station address setting means 12 to 15, the operation switches 16 to 19 and the display means 20 to 23 are provided in this case four each so as to correspond to each one of the loads 6 to 9.
Further, the adapter 2 controls the local terminal address setting means 26 for setting the local station address and the control terminal 1 through the power line.
A communication unit 28 for communicating with and the load 6 is turned on / off according to a signal from the control terminal 1 and a load control unit 30 for detecting the control result, and a signal received by the communication unit 28 is a load control unit. If the signal sent to the load control means 30 is sent to the load control means 30, the own address is added by the signal of the own address setting means 26, and a signal indicating the control result is sent to the communication section 28. It has a control means 29. The communication unit 28 communicates with the control terminal 1 via the power line 10, a communication unit 24, a clock generation unit 25 for generating a reference clock signal for communication, and a communication unit 28 itself when communication signal collision occurs. It has a clocking means 27 for holding the transmission of the signal generated by the arithmetic control means 29 for a time corresponding to the number of addresses set by the station address setting means 26.

The operation of the transmission control device having the above configuration will be described below. First, when installing the system, control terminal 1
And the addresses of the adapters 2 to 5 are set uniquely. For this address setting, for the control terminal 1, the local address of the control terminal 1 itself is set to the local address setting means 11 which is constituted by a DIP switch, and the adapters 2 to 9 which are remotely controlled are connected to the adapter 2. Addresses 5 to 5 are set in the other station address setting means 12 to 15 in binary code. The address of the adapter 2 is the same as the address set in the other station address setting means 12 of the control terminal 1 in the own station address setting means 26 of the adapter 2, and the own station address of the adapter 3 is the same. The adapter 4 is set to correspond to the other station address setting means 14 and the adapter 5 is set to correspond to the other station address setting means 15 so that the same address as that set in the other station address setting means 13 of the control terminal 1 is set. In this way, the address of the control terminal itself and the unique address of the adapters 2-5 are set in the control terminal 1.

When the address setting is completed, it is ready for daily remote control use. For example, a case where the user wants to control the load 8 that is currently in the off state to be on will be described. Control terminal 1
Since the display means 22 of is in the off state, the user who recognizes that the load 8 is currently in the off state is
Operate 18 When the operation switch 18 is operated, an operation command for turning on the load is transmitted from the control terminal 1 to the power line 10 by adding the address of the adapter 4 to which the load 8 is connected to the address of the control terminal 1 itself. . The adapters 2 to 5 constantly monitor whether or not there is a communication signal on the power line 10. Since the signal matches the own station address set in the adapter 4, the signal is received by the adapter 4. In this way, this signal reaches the arithmetic control means 29 from the communication section 28 of the adapter 4. The arithmetic control unit 29 drives the load control unit 30 by this signal, and the load 8 connected to the adapter 4 is turned on. The load control means 30 detects that the load 8 is turned on and sends this signal to the arithmetic control means 29.
The arithmetic control means 29 produces a signal in which the ON signal of the load 8 is added with the own station address of the adapter 4 set by the own station address setting means 26 and sends it to the communication means 24. Communication means 24
Returns this signal to the control terminal 1 via the power line 10. Receiving this signal, the control terminal 1 recognizes that the load 8 is turned on and turns on the display means 22. In this way, the user can recognize that the load 8 is turned on because the display means 22 is turned on.

As described above, the transmission control device can freely control on / off of the connected load by remote control.

However, although the transmission control device is convenient as described above, the conventional configuration has the following problems.

That is, if the address setting is incorrect, communication between the control terminal and the adapter may become impossible, or even if communication is performed, the display on the display means may be incorrect. That is. This display error is not the object of the present invention, and therefore its explanation is omitted here.

The case where communication becomes impossible will be described below with reference to FIGS. 11 to 15. Now the control terminal 1 address is 1, the adapter 2 address is 2, the adapters 3 and 4
Suppose that the address is set to 3 and the address of the adapter 5 is set to 5.

As shown in FIG. 13, the form of the communication signal is a binary code that is 0 when the signal is superimposed on the first half of the half cycle of the commercial frequency and 1 when the signal is superimposed on the latter half of the commercial frequency. The signal of is represented by the combination of 0 and 1. A of FIG. 13 shows a state in which a signal is superimposed on a commercial frequency, B shows only a signal component, and C, D, E, and F show time. That is, the signals 0 and 1 are superimposed on the time C, the time D, and the time E, respectively.
Indicates that no signal is superimposed (hereinafter referred to as an empty clock). For example, when the adapter is disconnected from the power line 10, the control terminal 1 may display an incorrect display on the display means of the address indicating the adapter. Inquiries about the presence or absence of abnormality are made, and in response to this, the respective adapters reply to the control terminal 1. Of course, the communication signal based on the above-mentioned binary code is also used for this communication. Control terminal 1 in this case
The response of each adapter to the inquiry from Fig. 14 and Fig.
It will be described with reference to FIG. FIG. 14 is a diagram showing a structure of a transmission signal, and FIG. 15 is a diagram showing a reply signal of each adapter. Since the setting address of the adapter 2 is 2 and the connected load 6 is on, the local station address part indicates "00000010" and the partner station address part indicates "00000001" which indicates 1 which is the address of the control terminal. , In the command section, the power line 10
Send to. The control terminal 1 receiving this reply signal and turning on the display means 20 subsequently inquires of the adapter 3 about the current state of the load 7. At this time, adapter 3
Since both the address and the address of the adapter 4 are set to 3, as described above, both the adapter 3 and the adapter 4 try to respond to the inquiry from the control terminal 1 at the same time. In this response, the address part of the own station and the address part of the partner station are exactly the same and can be transmitted from the respective adapters 3 and 4 to the power line 10. However, the first bit of the signal indicating the command part is one Is 0 and the other is 1, which means that the signal collision shown at time E in FIG. 13 has occurred. When this signal collision occurs, in the conventional configuration, the time corresponding to the number of addresses defined as the own station address, which is 3 in this case, is set to hold the signal transmission for the time of three times the half cycle. There is. First
The time measuring means 27 shown in FIG. 12 measures this waiting time. However, even if you wait for 3/2 cycles,
After all, the transmission is 0 and 1, so that the adapters 3 and 4 are in a state where they cannot permanently respond to the inquiry from the control terminal 1. Further, the control terminal 1 cannot make an inquiry to the adapter 5 because the reply signals from the adapter 3 and the adapter 4 do not arrive.

As described above, if the address setting of the adapter is incorrect, communication between the control terminal and the adapter may not be possible, and in this state, it is not possible to discover that the address setting is incorrect.

In the above description, the example in which the communication collision occurs due to the transmission between the adapters is explained. However, for example, when the system is expanded and a plurality of control terminals are installed, it may occur between the control terminal and the adapter. It may also occur between multiple control terminals.

It is an object of the present invention to provide a transmission control device capable of avoiding a communication failure when such a communication collision occurs.

Means for Solving the Problems Means of the present invention for achieving the above-mentioned object is an adapter or a communication unit capable of changing the value of its own station address set at the stage of detecting a communication collision according to a certain rule. The configuration is provided for the control terminal or both.

Operation With the above-described configuration, the present invention can prevent communication failure even if a communication collision occurs, and notify the user of an address setting abnormality.

Embodiment An embodiment of the transmission control device according to the first invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a first embodiment in which the communication unit of the present invention is provided in the adapter 34, and FIG. 2 is a flow chart showing a program included in the communication unit 34 of FIG. It should be noted that members having the same functions as those of the conventional example described with reference to FIGS. 11 and 12 are given the same reference numerals and the description thereof will be omitted. Reference numeral 31 is a communication means for exchanging communication signals with the control terminal 1 via the power line 10 and having a function as follows.

That is, the first action is to monitor whether or not a collision of communication signals has occurred on the power line 10, that is, whether or not a communication path is vacant. When the collision of communication signals occurs, a signal is sent to the counting means 32. To count the number of collisions of this communication signal, while sending a signal to the function means 33 to determine the waiting time. The second is the action of transmitting a signal from the local station to the control terminal 1. In this case, the communication signal created by the arithmetic control means 29 is transmitted to the power line 10, but when the above-mentioned signal collision occurs, the transmission timing is waited for the time determined by the time measuring means 27. Is. This waiting time is calculated by counting the reference clock signal generated by the clock generating means 25.
It is performed by counting the number of empty clocks corresponding to the predetermined value defined by 27. When the transmission is completed again,
A clear signal for returning the value of the counting means 32 to 0 is generated. Third
Is an operation of receiving a communication signal addressed to itself from the control terminal 1. Similar to the above, if this reception is completed, the counting means 32
Generates a clear signal that returns the value of to 0.

Reference numeral 32 is a counting means that receives a signal from the communication means 31 and sends a signal of the number of collision occurrences to the function means 33 when a communication signal collision occurs. Reference numeral 33 is a function means for receiving a signal from the own station address setting means 26, the communication means 31, and the counting means 32, calculating the waiting time by a predetermined procedure, and sending this signal to the clock means 27. The operation of the function means will be described below. When attempting to transmit a communication signal addressed to the control terminal 1 from the own station created by the arithmetic control means 29, if there is a collision of communication signals, this communication collision occurs a predetermined number of times (four consecutive times in this embodiment). 4) and confirm that there is a communication collision, and
When the transmission data from the own station is 0 at the time when the communication collision occurs twice, the address n set in the own station address setting means 26 is n−1, and when the transmission data is 1, the address n. Is calculated as n + 1 and this value is output to the clock means 27 as a waiting time. At this time, the counting means 32 returns the value to 0. 34 is communication means 31, counting means 32, and function means
33 is a communication unit.

The operation of the communication unit 34 will be described below with reference to the flowchart of FIG.

Control terminal 1 from own station made by arithmetic and control means 29
When transmitting a communication signal to the power line, it is checked whether the power line 10 is currently vacant, that is, whether there is a communication signal collision. This is step 1. When a communication signal collision occurs, it is confirmed whether or not the own station is trying to transmit or is transmitting. This is step 2. If the signal is about to be transmitted or is being transmitted, the signal from the counting means 32 is counted, and the number of collisions of communication signals is counted to a predetermined value, which is four in this embodiment. This is step 3. It is confirmed whether the data to be transmitted is 0 or 1 when the counting of four times is completed. This is step 4. Step 5
Then, if the transmission data is 0, the own station address setting means
The address n set in 26 is calculated as n-1, and the time counting means
Output this signal to 27. Step 6 is a step of returning the value of the clock means 27 to 0 when the transmission is completed after waiting for the waiting time calculated in step 5. Step 7 is an operation step in the case of no signal collision with respect to the confirmation of signal collision in Step 1, and is a step of confirming whether there is no signal, that is, whether or not there is an empty clock. Step 8 is a step of changing the waiting time x stored in the clock means 27 to x-1 if the check result in step 7 is an empty clock. In this embodiment, the waiting time x has an initial value equal to the address value n set in the local station address setting means 26. In step 9, each time the communication means 31 generates a vacant clock, in step 8, it is determined whether or not the value of x has reached 0 due to the action of subtracting the value of x one by one. In step 10, since the waiting time x in the time measuring means 27 becomes 0, the communication means 31 is instructed to be ready for transmission. Step 11 is a step for instructing the case where the transmission data at the time of detecting the four collisions in step 4 is 1. In this case, the function means 33 sets the waiting time x of the clock means 27 in the own station address setting means 26. The value obtained by adding 1 to the address value n thus obtained, n + 1, is substituted. Step 12 is a step showing a case where it is judged that it is not an empty clock in checking whether or not it is an empty clock in Step 7, and there is a communication signal on the power line 10 because it is not an empty clock because it is not a communication collision. are doing. That is, this is a step of detecting that the own station or another station is transmitting. Step 13 is a step showing a process when the number of collisions of the communication signals counted in step 3 is not 4, and 1 is added to the count value of the counting means 32. Step 14 is a step of instructing the value of the stored value x of the clock means 27 when the number of collisions of communication signals is not four, and at this stage, the value n set in the own station address setting means 26 is directly substituted for x. To do.

The operation of the transmission control device having the above configuration will be described below. Each address of the transmission control device having the configuration described in FIG. 11 is erroneously set as shown in FIG.
An example will be described in which the command shown in the figure is to be transmitted. Now, it is assumed that a communication for inquiring about the load state from the control terminal 1 has occurred to each adapter. Since this communication signal is sent in ascending order of address, the reply from the adapter 2 to the control terminal 1 is the power line.
If there is no trouble due to noise or the like in 10, the present embodiment can be performed smoothly as in the conventional example. Since the adapter 3 and the adapter 4 are erroneously set to the same address, the arrival timing of the communication signal from the control terminal 1 and the reply naming from each adapter are the same, and a collision of the reply signal occurs on the power line 10. To do. This signal collision occurs with the first signal of the command section that constitutes the return signal. That is, the transmission signal from the adapter 3 is 0,
The transmission signal from the adapter 4 is 1. In this case, the communication unit 28 built in each adapter operates as shown in FIG.

The communication unit 28 of the adapter 3 detects that the data 0 to be transmitted by the local station and the data 1 to be transmitted by the adapter 4 collide with the power line 10 at the timing A. When the number of times of detection reaches 4, the function means 33 sends the address 3 set in the own station address setting means 26 to the address measuring means 27 as the value 2 subtracted from 1 because the data to be transmitted is 0. Output. This output timing is B at 77
It is the clock eye. The communication means 31 counts the reference clock signal of the clock generation means 25 to transmit the waiting time thus set from the timing C of the 79th clock. At the timing D of the 103rd clock when the data transmission is completed, the value of the clock means 27 of the adapter 3 is cleared to 0, and the generation of the next communication request is waited. On the other hand, the communication unit 28 of the adapter 4 waits for the function means 33 to be set in the time counting means 27 because the transmission signal from the own station is 1 when the number of signal collisions detected at the timing A reaches four times. The time is changed to the value 4 which is obtained by adding 1 to the value 3 set in the own station address setting means 26. This timing is B, which is the 77th clock. That is, the waiting time of the adapter 4 is a time corresponding to 4 clocks from B. However, the transmission of the adapter 3 is performed when the time of 2 clocks elapses from B, and at the timing D when this transmission is completed, the waiting time is insufficient by 2 clocks, and the waiting time is 2 clocks. Data will be transmitted from timing E of the clock. At the timing F when this transmission is completed, the value of the clock means 27 is cleared to 0, and the next communication request is awaited. By adding a command expressing an address setting error to the transmission from the adapters 3 and 4 to the control terminal 1 when this signal collision occurs, the user can recognize the incorrect setting of the address.

As described above, in the present embodiment, when it is detected that the signal collision occurs on the communication transmission line a predetermined number of times, the address value n set in the own station address setting means is 0 when the transmission data from the own station is 0. Even if there is an erroneous address setting, each adapter has a communication unit that converts n-1 to n + 1 if the data sent from the station is 1, and uses this as a waiting time. It is possible to prevent the communication from being disabled, and to inform the user that the address is set incorrectly.

In the present embodiment, the communication section is provided only in the adapter, but a configuration provided only in the control terminal or in both the control terminal and the adapter has the action and effect in accordance with the object of the first invention. Is.

Next, an embodiment of the transmission control device of the second invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a block diagram showing a configuration in which the communication unit of the present invention is provided in the adapter 34, and FIG. 5 is a flow chart showing a program included in this communication unit. In FIGS. 11 and 12, members having the same functions as those described in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted or simplified. The numeral 35 stores the waiting time calculated by the function means 33, and the time measuring means 27
It is a waiting clock value storage memory that transmits this information to. Reference numeral 36 is a communication unit which has this waiting clock value storage memory and communicates with the control terminal 1. The operation of this communication unit will be described based on the flowchart of FIG. In the steps of this flowchart, steps 1 to 13 are the same steps as those of the communication unit according to the first aspect of the invention shown in FIG. 2, and a description thereof will be omitted. Step 14 is a step showing the action of the function means 33 when the own station is confirming whether it is transmitting or is about to transmit in step 2 and it is not in that state. The assigned address n is directly substituted. In step 15, the transmission data from the own station at the time of the signal collision of the predetermined number of times in step 4 (four times in this embodiment) is not 0. That is, in the step showing the action of the function means 33 when it is 1, in this case, the function means 33
Substitutes the value n + 1 obtained by adding 1 to the value n of its own station address into the waiting clock value storage memory 35. The same applies to step 16, and the function means 33 substitutes n-1 into the waiting clock value storage memory 35.

The operation of the present embodiment having the above configuration will be described below. now,
The entire system has the configuration shown in the conventional example of FIG. 11, the addresses of the adapter 3, the adapter 4, and the adapter 5 are erroneously set to 3, and each adapter has 0.
It is assumed that a signal of 0.1 is going to be communicated to the control terminal 1. In this case, since the addresses of the three adapters are the same address of 3, the transmission timings to the control terminal 1 coincide with each other, which causes a signal collision. The case where this signal collision occurs is shown in FIGS.
This will be described with reference to the drawings. “End” indicating the load state in FIG. 6 indicates that when rice is being cooked using, for example, an automatic rice cooker as the load, the timing of the response to the inquiry from the control terminal 1 is the timing of the end of rice cooking. It is a command that indicates a case that matches with. FIG. 7 shows the operation of the communication unit 36 when such a collision occurs. Adapters 3 and 4 for inquiries from the control terminal 1
・ 5 starts sending reply signals at the same timing. However, the above-mentioned signal collision occurs at the 17th bit. This is timing A. When the communication means 31 detects this signal collision and the counting means 32 counts the fourth signal collision, the function means 33 operates as follows. In other words, the function means 33 of the adapter 3 subtracts 1 from the address 3 set in the own station address setting means 26 because the data to be transmitted by the own station when the fourth signal collision occurs is 0. The value 2 is output to the waiting clock value storage memory 35. Since the data to be transmitted is 1, the function means 33 of the adapter 4 outputs the number 4 obtained by adding 1 to the erroneously set own station address 3 to the waiting clock value storage memory. Similarly, the function means 33 of the adapter 5 uses the waiting clock value storage memory 35.
2 is output to. This is the timing B address change. As a result of this address change, both the addresses of the adapter 3 and the adapter 5 are changed to 2, and the address of the adapter 4 is changed to 4. Therefore, the next transmission is performed from the adapter 3 and the adapter 5 with the timing C started. This transmission is performed up to the 17th bit, and the second signal collision occurs at the 18th bit. This is timing D
The function means of each adapter changes each address as in the case of the first signal collision described above. That is, the address of the adapter 3 is changed to 2 and the address of the adapter 5 is changed to 4. This is the address change at the timing E. Therefore, the next transmission is limited to the adapter 3, and the transmission can be completed without signal collision.
When the transmission from the adapter 3 is completed at the timing F, the adapter 4 and the adapter 5 start transmission at the same time after two clocks have elapsed. This transmission is performed up to the 16th bit, but a signal collision will occur at the 17th bit. This is a timing G collision. As a result of this collision, the address of adapter 4 is changed to 4 and the address of adapter 5 is changed to 2. This is the timing H. Thus, the transmission by the adapter 5 is performed at the timing I, and then the transmission by the adapter 4 is performed at the timing J.

As described above, in this embodiment showing the second invention, even if a signal collision occurs between adapters of three or more stations, it is possible to reduce the number of adapters subject to collision one station at a time, resulting in a communication disabled state. You can avoid becoming.

As in the first invention, the communication unit of this embodiment may be used only for the adapter, or may be used only for the control terminal or both the control terminal and the adapter.

Next, an embodiment of the transmission control device of the third invention will be described with reference to FIGS. FIG. 8 is a block diagram showing a configuration in which the communication unit of the present invention is provided in the adapter 34, and FIG. 9 shows a program included in this communication unit. The same numbers as those in the conventional example are given to the members having the same effects as in the conventional example and the first and second inventions, and the description thereof will be omitted.

37 is communication means 31, counting means 32, own station address setting means
It is a function means for performing the following operations based on the information from the 26 and the waiting clock value storage memory 35. That is, the counting means 32
When the input from the counter reaches a predetermined value (four times in this embodiment), the stored value m of the waiting clock value storage memory 35 is set to the communication means.
31 is m + 1 when the signal to be transmitted is 1, and
When the signal that the communication means 31 is going to transmit is 0, m
-1 is calculated, and this calculated value is input to the waiting clock value storage memory 35 again. When the input value from the counting means 32 is not a predetermined value and is not being transmitted, the own station address setting means
The own station address n set in 26 is input to the waiting clock value storage memory 35. Reference numeral 38 is a communication unit having the function means 37, and has a function as shown in the flowchart of FIG. Steps 1 to 15 in this flowchart are the same as those of the embodiments of the first invention and the second invention described with reference to FIGS. 2 and 5, and the description thereof will be omitted.

Step 16 is a step showing the action of the function means 37 when the signal is 0 when the transmission signal from the own station address is 0 when the predetermined number of signal collisions occur in step 4. . In this case, the function means 37 rewrites the stored value m of the waiting clock value storage memory to m-1. In step 17, the transmission data is 1 in response to the confirmation in step 4.
In this case, the stored value m of the waiting clock value storage memory is rewritten to m + 1.

The operation when the communication unit of the present embodiment is used for each adapter having the configuration of FIG. 11 with the above configuration will be described below with reference to FIG. In this case, it is assumed that the address and transmission signal of each adapter are the same as those shown in FIG. In this case, the response to the inquiry from the control terminal 1 is made at the same timing as described in the second invention. Then, as described with reference to FIG. 7, the first signal collision occurs. If this signal collision occurs a predetermined number of times,
Each adapter works as follows. That is, the function means 37 included in the adapter 3 waits for the value 2 obtained by subtracting 1 from the address 3 set in the local station address setting means 26 because the transmission signal of the 17th bit in which the signal collision has occurred is 0. Input to the value storage memory 35. Therefore, at this point, the value stored in the waiting clock value storage memory 35 of the adapter 3 is 2
Has become. Similarly, the function means 37 of the adapter 4 outputs 4 to the waiting clock value storage memory 35 because the transmission signal of the 17th bit is 1, and the value of the waiting clock value storage memory 35 becomes 4. The value of the waiting clock value storage memory 35 of the adapter 5 becomes 2. Thus, the transmissions by the adapters 3 and 5 are performed again at the same timing, and the second signal collision occurs at the 18th bit. When the second signal collision is detected a predetermined number of times, the function means 37 of the adapter 3 calls the value 2 stored in the waiting clock value storage memory 35, and subtracts 1 from this value to obtain the value 1 again as the waiting clock. Output to the value storage memory 35. Moreover, the function means of the adapter 5
The 37 calls the value 2 stored in the waiting clock value storage memory 35, and outputs the value 3 obtained by adding 1 to the waiting clock value storage memory 35 again. Thus, the adapter 3
・ Wait clock value storage memory for adapter 4 and adapter 5
The values of 35 are 1.4.3. Therefore, the adapter 3 can transmit at the next timing, and then the adapter 5 and the adapter 4 can transmit. So in this case, 2
The reply signal from each adapter to the control terminal 1 can be transmitted by only one transmission collision.

As described above, the third invention is a further improvement of the second invention and can further enhance the throughput of communication.

Similar to the embodiments of the first and second inventions, also in the third invention, the communication unit, which is the essence of the present invention, may be provided only in the adapter, only in the control terminal, or in both the adapter and the control terminal. It is possible to achieve the intended purpose of the invention.

EFFECTS OF THE INVENTION As is apparent from the above-described embodiment, the present invention can avoid an incommunicable state by changing the address of the adapter by the communication unit even if the address of the adapter is erroneously set. Moreover, the communication unit is the control terminal,
Since it is provided on at least one of the adapters, it has the effect of being convenient for the user.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the first invention of the transmission control device, FIG. 2 is a flow chart showing the operation of the first communication section, and FIG. 3 is a timing chart showing the operation of the first invention. FIG. 4 is a block diagram showing an embodiment of the second invention, FIG. 5 is a flow chart showing the operation of the communication unit of FIG. 4, and FIG. 6 is each for explaining the operation of the second invention. FIG. 7 is a state diagram of the adapter, FIG. 7 is a timing chart for explaining the operation of the second invention, FIG. 8 is a block diagram showing an embodiment of the third invention, and FIG. 9 is a communication unit of FIG. FIG. 10 is a timing chart for explaining the operation of the third invention, FIG. 11 is a block diagram for explaining the overall configuration of the transmission control device, and FIG. 12 is a conventional transmission control. Block diagram for explaining the configuration of the device,
13 and 14 are explanatory diagrams for explaining communication signals of the transmission control device, and FIG. 15 is a state diagram of each adapter for explaining the operation of the conventional transmission control device. 1 ... Control terminal, 2-5 ... Adapter, 6-9 ...
… Load, 10 …… Power line, 32 …… Counting means, 33 …… Function means, 34 ・ 36 ・ 38 …… Communication section, 35 …… Standing clock value storage memory.

Continuation of the front page (56) Reference JP 62-287723 (JP, A) JP 61-265937 (JP, A) JP 60-189342 (JP, A) JP 60-107946 (JP , A)

Claims (3)

[Claims] 1. A control terminal and / or a control terminal having own station address setting means for setting an own station address of an adapter or both, and this control terminal communicates with each other via a commercial power line and is controlled by this control terminal. Transmission controller main body consisting of a plurality of adapters to which the load is connected, counting means for counting the number of collisions of communication signals, the signal from this counting means and the address value set in the local address setting means. And a function means for determining the waiting time of the communication signal by performing addition and subtraction processing with a signal from the commercial power line,
The clock generation means for generating the reference clock signal and the waiting time input from the function means are stored, and when the waiting time reaches "0", the elapsed time is counted by the input from the clock generation means. A transmission control device, comprising: a communication unit including a timing means for transmitting a signal to a commercial power line, the communication unit being provided on at least one of a control terminal and an adapter. 2. The transmission control device according to claim 1, wherein the communication unit has a waiting clock value storage memory that stores the waiting time determined by addition and subtraction by the function means and outputs it to the timekeeping means. 3. When the number of signal collisions by the counting means reaches a predetermined value, the function means arithmetically processes the value stored in the waiting clock value storage memory to determine a new waiting time, Outputting to a value storage memory (2)
The transmission control device described.