JP2011171944A - Power line carrier communication control system, power line carrier communication control program, and power line carrier communication control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power line carrier communication control system, a power line carrier communication control program and a power line carrier communication control method, capable of diversifying apparent control while maintaining unitary control. <P>SOLUTION: The power line carrier communication control system includes: groups 3A and 3B of a plurality of input/output terminals 2 connected with a communication network N through a power line W; operation terminals 5 and 6 connected with each of the input/output terminals 2 of the input/output terminal groups 3A and 3B, for inputting and outputting the setting information of the input/output terminals 2; an integrated communication terminal 7 provided with a first RAM (Random Access Memory) 26, a second RAM 27, a third RAM 28, and a fourth RAM 30 which are made to be the same size and sector area and store the setting information of the input/output terminals 2 and the operation terminals 5 and 6, and a control section 21 for controlling the setting information; and a communication section 8 provided with a power line modem 42 for modulating and demodulating signals related to the setting information and connected with each of the integrated communication terminal 7, the input/output terminals 2 and the operation terminals 5 and 6 in one-to-one correspondence. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power line carrier communication control system, a power line carrier communication control program, and a power line carrier communication control method capable of realizing multiple control.

  A power line carrier communication (hereinafter referred to as “PLC”) network system in the industrial field includes one control terminal (O / I) and a plurality of operation terminals via a modulator / demodulator (hereinafter referred to as “PLC modem”). (I / O). Then, a control mode of “1 (O): n (I)” or “1 (I): n (O)” (where n is an integer and an address number on the network is assigned) is adopted, and there is no failure. Based on a centralized control system.

  For this reason, when there is a restriction on communication means, when realizing centralized remote control that requires a relatively small amount of information and high reliability (for example, ATC (automatic train control device) of Shinkansen), a PLC network The system is positioned as an effective system.

  When the PLC network system is viewed with a communication protocol, the “1: n” “1” side is the master unit (connected to the central terminal), and the “n” side is a plurality of slave units (each connected to the operation terminal). The machine circulates the slave machines in order to exchange information (for example, see Patent Document 1). The signal form on the operation terminal side of the PLC modem is a serial port that directly reflects the communication protocol of the PLC network system and does not match the operation terminal based on two terminals as it is, so there is something between the PLC modem and the operation terminal. It takes the usage form of adding a connection interface. Many PLC network systems have a system configuration in which the operation terminal is dedicated to input / output only, so the operation terminal side of the PLC modem has a bi-directional (one I / O can handle I / O) connection interface function. The specifications to be made are special.

JP 2010-028562 A

  However, when the above-mentioned conventional PLC network system controls the operation terminals divided into a group for each building, floor, room, partition partition and each of the operation terminals divided into multiple groups, multiple control is required. Therefore, it is not possible to respond to the request with the simple centralized control of “1: n”.

  Here, the easy pluralization of the PLC network system for diversification causes not only high cost due to interference in the network and loss of function distribution, but also denies unified control which is the greatest feature. In addition, when the main program of the general terminal is recombined and the PLC network system is diversified, the editing design is not performed due to the difficulty and the scale of the program. Not right.

  The present invention has been made in view of the above circumstances, and a power line carrier communication control system, a power line carrier communication control program, and a power line carrier communication capable of diversifying apparent control while maintaining unified control. An object is to provide a control method.

The present invention employs the following means in order to solve the above problems.
A power line carrier communication control system according to the present invention includes a group of a plurality of input / output terminals connected to a communication network via a power line and the input / output terminals connected to each of the input / output terminals of the input / output terminal group. The first RAM, the second RAM, and the third RAM, which have the same size and sector area as the operation terminal to which the terminal setting information is input / output, and store the setting information of the input / output terminal and the operating terminal. A communication control terminal that includes a RAM, a fourth RAM, and a control unit that manages the setting information, and is connected to the communication network via the power line; and modulation and demodulation of a signal related to the setting information A communication unit that has a power line modem that performs one-to-one connection with each of the communication control terminal, the input / output terminal, and the operation terminal, and the control unit includes: Configuration stored in one RAM A transfer unit for transferring information to the second RAM and setting information stored in the third RAM to the fourth RAM; and the latest setting information of the input / output terminal and the operation terminal to the operation terminal. A reading unit that reads from the storage unit, a storage unit that stores the read setting information in the first RAM or the third RAM, and setting information stored in the first RAM and the second RAM, or the third RAM. And a comparison unit that compares the setting information stored in the fourth RAM, and the input / output terminal and the operation terminal having different setting information are selected, and the input / output terminal and the operation terminal are selected. And a rewriting unit for writing new setting information.

  The present invention controls communication between the setting information of the operation terminal and each input / output terminal read from the operation terminal and stored in the first RAM, and the setting information of the operation terminal and each input / output terminal stored in the second RAM. Contrast within the terminal. At this time, if there is no difference, no particular processing is performed. If there is a difference, only the operation terminal and the corresponding input / output terminal having the difference between the old and new setting information are updated. Write to three RAMs. Then, in contrast to the setting information stored in the fourth RAM and the operation terminal and each input / output terminal, the setting information is rewritten only for the operation terminal and each input / output terminal having a difference. Therefore, the communication control terminal can minimize the communication with the operation terminal and the input / output terminal by communicating only with the operation terminal whose setting information has changed and the input / output terminal thereof.

  The power line carrier communication control system according to the present invention is the power line carrier communication control system, comprising a plurality of the operation terminals to which the group of input / output terminals are respectively connected, and the input / output terminals in one operation terminal. When there is no difference between the old and new setting information, the reading unit sequentially reads setting information of other operation terminals.

  In the present invention, when there are a plurality of operation terminals, the setting information for only the changed operation terminal and the input / output terminal is confirmed by sequentially checking whether or not the setting information of the input / output terminal group in the operation terminal has changed. If there is no change, communication is not performed. Therefore, even when a large number of operation terminals are connected, the minimum necessary processing can be performed while reducing the communication time.

  The power line carrier communication control system according to the present invention is the power line carrier communication control system, wherein the communication unit is connected to the communication control terminal, the input / output terminal, or the operation terminal. A second communication unit connected one-to-one with each of the first communication unit, the address number on the communication network of the first communication unit is 0, and the second communication unit on the communication network Are associated with sector numbers of the first RAM, the second RAM, the third RAM, and the fourth RAM, and the comparing unit is configured to associate the first RAM and the second RAM with each other. The setting information stored in the sector with the same sector number is compared with each other and stored in the sector with the same sector number in the third RAM and the fourth RAM. And comparing the setting information to each other that.

  The present invention provides the setting information of the operation terminal or input / output terminal specified as the address number in the sector of the same sector number in the first RAM, second RAM, third RAM, and fourth RAM of the communication control terminal. Is stored. Therefore, by tracing the setting information stored in the sector having the sector number corresponding to the address number, it is possible to determine whether the setting information has changed without directly communicating with each input / output terminal. And by communicating only with the operation terminal and input / output terminal which have changed, exact and smooth multi-dimensional control is realizable.

  The power line carrier communication control program according to the present invention causes a computer to function as the control unit.

  The power line carrier communication control method according to the present invention includes a group of input / output terminals connected to a communication network via a power line, and setting information of each of the input / output terminals connected to the input / output terminal group. A power line carrier communication control method for centrally managing an operation terminal to be output by a communication control terminal, a reading step for reading setting information of the operation terminal and the input / output terminal group input thereto, There is a difference between the storing step for storing the setting information of the operation terminal and the input / output terminal group, the comparison step for comparing the setting information of the operation terminal and the input / output terminal group before and after reading, and the setting information before and after reading. A rewriting step of selecting the operation terminal and the input / output terminal and writing new setting information to the operation terminal and the input / output terminal. That.

  The present invention compares the setting information of the operation terminal before and after reading and each input / output terminal and does not perform any particular processing if there is no difference between the two companies, while if there is a difference, the corresponding operation The updated setting information is written only to the terminal and the input / output terminal. At this time, the communication control terminal communicates only with the operation terminal whose setting information has changed and its input / output terminal. Therefore, communication with the operation terminal and the input / output terminal can be minimized.

  The power line carrier communication control method according to the present invention is the power line carrier communication control method, wherein a plurality of operation terminals to which the group of input / output terminals are respectively connected are compared with each other in the comparison step. When there is no change in the setting information in the operating terminal, the reading process is performed by moving to another operating terminal.

  According to the present invention, a group of input / output terminals connected to a communication network via a power line, and an operation terminal connected to the input / output terminal group for inputting / outputting setting information of each of the input / output terminals. The apparent control at the operation terminal can be diversified while maintaining the central control at the communication control terminal.

It is a schematic diagram showing a power line carrier communication control system according to an embodiment of the present invention. It is a functional block diagram which shows the power line carrier communication control program which concerns on one Embodiment of this invention. It is explanatory drawing which shows the data structure of the communication protocol in the power line carrier communication control system which concerns on one Embodiment of this invention. It is a flowchart which shows the power line carrier communication control method which concerns on one Embodiment of this invention. It is a schematic diagram which shows the conventional power line carrier communication control system.

An embodiment according to the present invention will be described with reference to FIGS.
As shown in FIG. 1, the power line carrier communication control system 1 according to the present embodiment includes input / output terminal groups 3A and 3B composed of a plurality of input / output terminals 2 connected to a communication network N via a power line W, and an input / output terminal group 3A and 3B. Operation terminals 5 and 6 connected to each of the output terminal groups 3A and 3B, a communication control terminal 7 connected to the communication network N via the power line W, a communication control terminal 7, an input / output terminal 2, and an operation terminal And a communication unit 8 connected to each of 5 and 6 on a one-to-one basis.

  The input / output terminal 2 includes a load unit 10 that operates when supplied with electric power, a terminal-side microcontroller 11 that performs processing necessary for work, and an interface unit 12 with the communication unit 8. Here, depending on the input / output terminal 2, the flow of information between the load unit 10 and the communication unit 8 is not only in the direction from the communication unit 8 toward the load unit 10, but also in the input / output terminal 2A, The direction from the load unit 10 toward the communication unit 8 may be used.

  The operation terminals 5 and 6 include an interface unit 15 with the communication unit 8, an operation unit 16 to which setting information of each connected input / output terminal 2 is input, and a display on which the setting information of each input / output terminal 2 is displayed. A power supply unit 18 connected to the power line W, and an operation side microcontroller 20 in which a program for performing necessary processing is stored.

  The communication control terminal 7 is input with the control side microcontroller (control unit) 21 for processing the setting information, the interface unit 22 with the communication unit 8, the setting information of the operation terminals 5, 6 and the input / output terminals 2. The operation unit 23 and the display unit 25 on which the setting information is displayed, and a first RAM (the same size and the same number of sectors) in which the setting information of the operation terminals 5 and 6 and the input / output terminals 2 are stored. A random access memory (Random Access Memory) 26, a second RAM 27, a third RAM 28, a fourth RAM 30, a ROM (Read Only Memory) 31, and a power supply unit 32 connected to a power line W are provided.

  As shown in FIG. 2, the supervising microcontroller 21 sets the setting information stored in the first RAM 26 to the second RAM 27 or the setting information stored in the third RAM 28 as a function means (program module). Are transferred to the fourth RAM 30, a reading unit 35 for reading the latest setting information of the input / output terminal 2 and the operation terminals 5 and 6 from the operation terminals 5 and 6, and the read setting information for the first RAM 26 or A storage unit 36 that is stored in the third RAM 28, and a comparison unit 37 that compares the setting information stored in the first RAM 26 and the second RAM 27 or the setting information stored in the third RAM 28 and the fourth RAM 30 The input / output terminal 2 and the operation terminals 5 and 6 having different setting information are selected, and a new one is added to the input / output terminal and the operation terminal. A rewriting part 38 writes constant information, based on the processing program P having a performs predetermined processing.

  The ROM 31 stores group information of the input / output terminal groups 3A and 3B connected to the operation terminals 5 and 6, a processing procedure based on the processing program P, and the like. The size and structure of the ROM 31 are the same as those of the first RAM 26, the second RAM 27, the third RAM 28, and the fourth RAM 30.

  The communication unit 8 includes a first communication unit 40 connected to the communication control terminal 7, a second communication unit 41 connected to the input / output terminal 2 or each of the operation terminals 5 and 6 on a one-to-one basis, It has. The first communication unit 40 performs communication processing with a power line modem 42 that modulates and demodulates a signal related to setting information, an interface unit 43 with the communication control terminal 7, and a power supply unit 45 connected to the power line W. A communication microcontroller 46 and an internal memory 47 for I / O are provided. The second communication unit 41 has substantially the same configuration as the first communication unit 40. The size and structure of the internal memory 47 are the same as those of the first RAM 26, the second RAM 27, the third RAM 28, the fourth RAM 30, and the ROM 31.

  The first communication unit 40 has an address number 0 on the communication network N. Also, each address number on the communication network N of the second communication unit 41 is associated with each sector number of the first RAM 26, the second RAM 27, the third RAM 28, and the fourth RAM 30. The comparison unit 37 compares the setting information stored in the same sector number in the first RAM 26 and the second RAM 27 and also stores the setting information stored in the same sector number in the third RAM 28 and the fourth RAM 30. Compare information.

  The number of bytes of the setting information is the same as the area (number of bytes) of each sector of the internal memory 47 of the communication unit 8 and the ROM 31, the first RAM 26, the second RAM 27, the third RAM, and the fourth RAM 30. At this time, for example, the sector number is assigned to the head data as shown in FIG. 3A of the communication message of the setting information. Here, the upper 8 bits of the memory address number is the sector number, and the lower 8 bits of the memory address number is the sector address number. In this way, by combining the sector numbers with the sector address numbers expanded and two-dimensionalized, the ROM 31, the first RAM 26, the second RAM 27, the third RAM 28, and the fourth RAM 30 have a three-dimensional hierarchical structure. Yes.

  Here, assuming that the maximum number of bytes that can be read / written in one communication message is 16 bytes, a maximum of 16 reads / writes are executed when 256 bytes are targeted. As shown in FIG. 3B, the read / write is identified by, for example, the first bit in one of the data constituting the command message.

Next, the power line carrier communication control method in the present embodiment will be described together with the operation of the power line carrier communication control system 1.
As shown in FIG. 4, this method and the processing by the processing program P include a transfer step (S01), a reading step (S02), a storing step (S03), a comparing step (S04), and a rewriting step (S05). ) And.

  In the transfer step (S01), the setting information stored in the first RAM 26 is transferred to the second RAM 27, and the setting information stored in the third RAM 28 is transferred to the fourth RAM 30.

  In the reading step (S02), the address number of the second communication unit 41 connected to the operation terminals 5 and 6 or the operation terminals 5 and 6 to be read is designated, and the designated operation terminals 5 and 6 and The latest setting information of the input / output terminal 2 in the operation terminals 5 and 6 is read.

  The storing step (S03) stores the read setting information in the sector of the first RAM 26 corresponding to the address number, and the storing step (S13) corresponds to the read setting information corresponding to the address number. Store in the sector of the third RAM 28.

  In the comparison step (S04), the setting information stored in the predetermined sectors of the first RAM 26 and the second RAM 27 is compared. In the comparison step (S14), the setting information stored in the sectors of the predetermined numbers in the third RAM 28 and the fourth RAM 30 are compared.

  In the rewriting step (S05), only the input / output terminal 2 and the operation terminals 5 and 6 having different setting information are selected, and new setting information is written to the input / output terminal and the operation terminal.

  A control operation using the power line carrier communication control system 1 and the power line carrier communication control method will be described.

  First, in the transfer step (S01), the setting information stored in the first RAM 26 is transferred to the second RAM 27. The setting information stored in the third RAM 28 is moved to the fourth RAM 30.

  Next, in the reading step (S02), first, the address number of the second communication unit 41 connected to the operation terminal 5 is designated, and the input / output terminal 2 and the latest of the operation terminal 5 in the designated operation terminal 5 are designated. Is read from the operation terminal 5.

  Then, the process proceeds to the storing step (S03), and the read setting information is stored in the sector of the first RAM 26 having the sector number corresponding to the address number.

  Subsequently, the process proceeds to the comparison step (S04), and the setting information stored in the sectors corresponding to the predetermined sector numbers in the first RAM 26 and the second RAM 27 is compared.

  At this time, if there is no change in the setting information, the process proceeds to the reading step (S02), where the address number of the second communication unit 41 connected to the operation terminal 6 is specified, and at the specified operation terminal 6 The latest setting information of the input / output terminal 2 and the operation terminal 6 is read from the operation terminal 6. Similarly, the storing step (S03) and the comparing step (S04) are performed.

  On the other hand, when the setting information of one input / output terminal 2 of the input / output terminal group 3B connected to the operation terminal 6 is updated by the input to the operation unit 16 of the operation terminal 6, the comparison process (S04) is performed. Therefore, the comparison results of the setting information of the corresponding operation terminal 6 and input / output terminal 2 are different. At this time, the process proceeds to the storage step (S13), the address numbers of the corresponding input / output terminal 2 and operation terminal 6 are designated from the setting information having a difference, and the updated setting information is corresponding to the third RAM 28. Write to the sector.

  Next, the process proceeds to the comparison step (S14), and the setting information stored in the sector corresponding to the predetermined sector number of the third RAM and the fourth RAM 30 is compared. And it transfers to a rewriting process (S05), selects only each address number of the 2nd communication part 41 connected with the corresponding input / output terminal 2 and the operation terminal 6 from the setting information with a difference, Writing of new setting information to the input / output terminal 2 and the operation terminal 6 is performed via the first communication unit 40 and the second communication unit 41.

  According to the power line carrier communication control system 1 and the power line carrier communication control method, the operation terminal 5 read from the operation terminals 5 and 6 connected to the second communication unit 41 of the designated address number and stored in the first RAM 26. 6 and the setting information of the input / output terminal 2 and the setting information before reading the operation terminals 5 and 6 and the input / output terminals 2 stored in the second RAM 27 are compared in the communication control terminal 7. At this time, if there is no difference between the two, no particular processing is performed, whereas if there is a difference, only the operation terminals 5 and 6 and the corresponding input / output terminal 2 having the difference are updated. Information is written into the third RAM 28. Then, in contrast to the setting information of the operation terminals 5 and 6 and the input / output terminal 2 stored in the fourth RAM 30, only the operation terminals 5 and 6 and the input / output terminal 2 having differences are rewritten. . As a result, the communication control terminal 7 communicates only with the operation terminals 5 and 6 and the input / output terminal 2 whose setting information has changed.

  Therefore, the number of times of communication with the operation terminals 5 and 6 and the input / output terminal 2 can be minimized, and apparent control is performed in a multi-dimensional control as shown in FIG. 5 while maintaining a unified control. The same control can be performed. As a result, for example, it is possible to cause the communication control terminal 7 to perform a control interruption for the setting of the operation terminals 5 and 6. In relation to this, the operation terminals 5 and 6 can perform a remote (interrupt permission) setting operation for the entire group.

  In particular, for each of the plurality of operation terminals 5 and 6, the operation terminals 5 and 6 that have changed are confirmed by sequentially checking whether or not the setting information of the connected input / output terminal groups 3 </ b> A and 3 </ b> B is changed for each operation terminal. 6 and only the input / output terminal 2 are changed, and communication is not performed for those that have not changed. Therefore, even if a large number of operation terminals are connected, the minimum necessary processing can be performed while reducing the communication time.

  Further, the address number on the communication network N of the first communication unit 40 is set to 0, the respective address numbers on the communication network N of the second communication unit 41, the first RAM 26, the second RAM 27, the third RAM 28, the second The sector numbers of the four RAMs 30 and the ROM 31 are associated with each other, and the operations specified as the same address numbers in the sectors having the same sector numbers of the first RAM 26, the second RAM 27, the third RAM 28, and the fourth RAM 30 Setting information for each of the terminals 5 and 6 or the input / output terminal 2 is stored. Then, the comparison unit 37 compares the setting information stored in the sectors having the same sector number in the first RAM 26 and the second RAM 27 and also in the sectors having the same sector number in the third RAM 28 and the fourth RAM 30. Compare the stored setting information.

  Therefore, by tracing the setting information stored in the sector, it is possible to determine whether the setting information has changed without directly communicating with each input / output terminal 2. Then, by communicating only with the operation terminals 5 and 6 and the input / output terminal 2 that have changed, accurate and smooth multi-dimensional control can be realized.

  Furthermore, by storing the program P in the ROM 31, the ROM 31 can be a removable memory, and only the processing program P stored in the ROM 31 can be edited in accordance with the system to be constructed.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the numbers of the operation terminals 5 and 6 and the input / output terminal groups 3A and 3B are each two, but are not limited to this, and may be one or three or more. Further, the number of bytes of the setting information is not limited to 256 bytes, and there is no particular limitation such as 512 bytes.

  In the above-described embodiment, the lamp as the input / output terminal 2 is connected to the second communication unit 41, and the operation terminals 5 and 6 having an operation switch as the operation unit 16 and a setting monitor as the display unit 17 via the power line W. And a lamp management system connected to an overall management panel serving as the communication overall terminal 7. At this time, it is assumed that the operation panel is separately installed for each room. At this time, the setting state of the operation panel and the lamp is changed by turning on the operation switch of the operation panel of the corresponding room in order to change the lamp in the room from the unlit state to the lit state. .

  After performing the transfer process (S01), the communication control terminal 7 sequentially performs the reading process (S02) to the comparison process (S04) on each operation panel. At this time, in the case of the operation panel in which the setting information is not changed, the operation panel is moved to the next room, and this is repeated until the operation panel in which the setting information is changed is reached.

  On the other hand, when the setting information of the changed operation panel is read, the setting information of the operation panel is stored in the first RAM 26 and compared with the setting information of the previous round stored in the second RAM 27. There is a difference between the two. Therefore, after the comparison step (S04), the process proceeds to the storage step (S03), and setting information relating to the operation panel and the lamp is stored in the third RAM. Then, the process proceeds to the comparison step (S04), and, in contrast to the setting information stored in the fourth RAM 30, the setting information is rewritten only for the operation panel and the lamp that are different in the rewriting step (S05). . Thereby, the information displayed on the setting monitor related to the lamp on the operation panel is rewritten from the off state to the on state, and the lamp is changed from the off state to the on state.

  Note that one of the input / output terminals 2 may be a human sensor, and the setting information of the corresponding operation panel may be changed based on input information from the human sensor. Further, the present invention can be applied not only to a lamp management system but also to a hotel guest room management system, an alarm system, a greenhouse management system, and the like.

DESCRIPTION OF SYMBOLS 1 Power line carrier communication control system 2 Input / output terminal 3A, 3B Input / output terminal group 5, 6
Operation terminal 7 Communication control terminal 8 Communication unit 21 Control side microcontroller (control unit)
26 First RAM
27 Second RAM
28 3rd RAM
30 4th RAM
33 Transfer unit 35 Reading unit 36 Storage unit 37 Comparison unit 38 Rewriting unit 40 First communication unit 41 Second communication unit 42 Power line modem N Communication network P Power line carrier communication control program W Power line

Claims (6)

A group of a plurality of input / output terminals connected to a communication network via a power line;
An operation terminal connected to each of the input / output terminals of the input / output terminal group and configured to input / output setting information of the input / output terminals;
A first RAM, a second RAM, a third RAM, a fourth RAM, which are set to the same size and sector area, and store setting information of the input / output terminal and the operation terminal, and manage the setting information A communication control terminal having a control unit and connected to the communication network via the power line;
A communication unit that includes a power line modem that modulates and demodulates a signal related to the setting information, and that is connected to each of the communication control terminal, the input / output terminal, and the operation terminal on a one-to-one basis; ,
With
A transfer unit for transferring the setting information stored in the first RAM to the second RAM and the setting information stored in the third RAM to the fourth RAM;
A reading unit that reads the latest setting information of the input / output terminal and the operation terminal from the operation terminal;
A storage unit for storing the read setting information in the first RAM or the third RAM;
A comparison unit for comparing each setting information stored in the first RAM and the second RAM, or each setting information stored in the third RAM and the fourth RAM;
A rewrite unit that selects the input / output terminal and the operation terminal having setting information having a difference, and writes new setting information to the input / output terminal and the operation terminal;
A power line carrier communication control system comprising: A plurality of the operation terminals each connected to the group of input / output terminals;
2. The power line according to claim 1, wherein when there is no difference between old and new setting information of the input / output terminals in one operation terminal, the reading unit sequentially reads setting information of other operation terminals. Carrier communication control system. The communication unit includes a first communication unit connected to the communication control terminal, and a second communication unit connected to the input / output terminal or the operation terminal in a one-to-one relationship,
The address number on the communication network of the first communication unit is set to 0,
Each address number of the second communication unit on the communication network is associated with sector numbers of the first RAM, the second RAM, the third RAM, and the fourth RAM,
The comparison unit compares the setting information stored in sectors having the same sector number in the first RAM and the second RAM, and the same sector in the third RAM and the fourth RAM. The power line carrier communication control system according to claim 1 or 2, wherein the setting information stored in the numbered sectors are compared with each other.   A power line carrier communication control program for causing a computer to function as the control unit according to any one of claims 1 to 3. A group of input / output terminals connected to a communication network via a power line and an operation terminal connected to the input / output terminal group and to which setting information of each of the input / output terminals is input / output are unified by a communication control terminal. A power line carrier communication control method to manage,
A reading step of reading setting information of the operation terminal and the input / output terminal group input thereto;
A storage step of storing setting information of the read operation terminal and the input / output terminal group;
A comparison step of comparing the setting information of the operation terminal and the input / output terminal group before and after reading;
A rewriting step of selecting the operation terminal and the input / output terminal having a difference in setting information before and after reading, and writing new setting information to the operation terminal and the input / output terminal;
A power line carrier communication method characterized by comprising: For the plurality of operation terminals to which the group of input / output terminals are respectively connected,
6. The power line carrier communication control method according to claim 5, wherein when the setting information in one operation terminal is not changed in the comparison step, the reading step is performed by moving to another operation terminal. .

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