JP4956090B2 - Control information transmission system - Google Patents

Description

  The present invention relates to a control information transmission system, and in particular, a control information transmission system including a control device that controls transmission of a control signal for cyclically serially transmitting control information between a plurality of transmission stations that can be transmission master stations. About.

  Systems equipped with transmission lines that cyclically transmit control information cyclically include elevator control systems that control elevators, spatial monitoring of roads, rivers, spaces, etc., status monitoring of buildings and factories, various structures, It is used in various fields such as a monitoring system applied to the field of state monitoring of machinery and electrical equipment. In this specification, the elevator control information transmission system will be described as an example from among the control information transmission systems applied to all these systems in which the control information is cyclically transmitted serially. Of course, it can also be applied to a cyclic serial transmission system.

  In a control information transmission system that cyclically transmits control information in a conventional elevator control system, address information is transmitted from a transmission master station, and a slave station corresponding to the address responds to input / output of data. When address information can be received correctly, a read data transmission response, data write processing, and the like are performed. In order to perform such processing, a microcomputer is used, and the determination as to whether or not control information for the local station has been transmitted is included in the program that operates the microcomputer. It was carried out using the data.

  In addition, since transmission stations including a plurality of slave stations connected via a transmission line have various functions, a dedicated program was created to match the transmission stations having these various functions. . Therefore, it is necessary to manage and maintain the program for each type and function of the transmission station.

  In order to cope with such restrictions and needs, the “elevator control transmission system” in Patent Document 1 and “elevator information transmission control device” in Patent Document 2 do not take a complicated configuration, Technologies that can increase transmission efficiency have been proposed.

In addition, when performing group management of elevators, even if a dedicated transmission master station is not provided, for example, when a power failure occurs due to a power failure or the like, the monitoring panel display signal is transmitted in the transmission process. A proposal that can control operation without problems is described in “Elevator Group Management and Control Device” of Patent Document 3.
JP 2001-247269 A JP 2003-81546 A JP 2001-146367 A

  However, according to the techniques proposed in Patent Literature 1 and Patent Literature 2, if some abnormality occurs in the transmission master station and the address information cannot be transmitted, data transmission is possible even if other transmission stations are normal. There is a possibility that the operation may not be performed. Even if the transmission station that functions as the transmission master station stops and the control processing stops, there is no particular problem in the case of a transmission system that does not require transmission processing, but it is necessary to continue the control operation. In some cases, there is a problem that another transmission station needs to take charge of the operation of the transmission station functioning as the transmission master station as the transmission master station.

  In the invention described in Patent Document 3, when a power failure occurs and an abnormality occurs in a transmission station functioning as a transmission master station, the response is limited to the response to the abnormality caused by the power failure. Therefore, no measures were taken against the occurrence of an abnormality in the transmission master station due to other causes. In addition, since elevator group management control is based on the premise that the system is controlled using a microcomputer, switching control of transmission stations is performed using software, depending on the implementation status of other functions. May have an unstable control action.

  The present invention has been made in view of the above problems, and when an abnormality occurs in a transmission station functioning as a transmission master station, another transmission station continues the function of the transmission master station, and data in the transmission system is obtained. An object of the present invention is to provide a control information transmission system capable of ensuring stable operation of continuous transmission control by eliminating software operations that tend to be unstable control operations without stopping transmission.

  In order to solve the above problems, a control information transmission system according to a first configuration as a basic conceptual configuration of the present invention is provided in each of at least two transmission stations that can be transmission master stations. In a control information transmission system comprising a transmission control circuit that controls transmission of a cyclically transmitted control signal, the transmission control circuit includes a station number holding unit that holds a unique station number for each of the transmission stations, During the transmission processing operation of the local station as a transmission master station, the other station operation determination unit for determining the transmission processing operation of the other station by the station number of the other station, and the other station as the transmission master station by the other station operation determination unit A multi-transmission master station prevention unit that stops the operation of the transmission master station in the own station and prevents the occurrence of a multi-transmission master station when it is determined that the transmission processing operation is performed. Characterized in that it comprises a.

  Further, the control information transmission system according to the second configuration of the present invention is the control information transmission system according to the first configuration, wherein the other station operation determination unit is based on the unique station number held by the station number holding unit. A monitoring unit that monitors the status of transmission processing in each station, and a priority determination unit that determines the priority of transmission processing depending on the station number corresponding to the length of transmission interruption time based on the monitoring result of the monitoring unit And the multiple transmission master station prevention unit switches the transmission station to be a transmission master station based on the priority of the transmission processing determined by the priority determination unit, and transmits the control signal. A switching unit for continuing the process is provided.

  Further, the control information transmission system according to the third configuration of the present invention is the control information transmission system according to any one of the first configuration and the second configuration, wherein the other station operation determination unit includes at least the station number. A multiplex transmission master station prevention unit, comprising: a command analysis unit that analyzes a switching command in the information; and a transmission station determination unit that determines a transmission station to be a transmission master station based on an analysis result of the command analysis unit. Includes a switching unit that switches the transmission station to be a transmission master station to the transmission station determined by the transmission station determination unit and continues the transmission process of the control signal.

  A control information transmission system according to a fourth configuration of the present invention is the control information transmission system according to any one of the first configuration to the third configuration, wherein the other station operation determination unit is configured to perform other operations during the master transmission operation of the own station. When the transmission operation of the control signal of the station is detected and the multiple transmission master station prevention unit detects that the other station is operating as the transmission master station by the other station operation determination unit, the transmission at the local station is performed. By preventing the operation as a master station, the occurrence of multiple transmission master stations in the system is prevented.

  A control information transmission system according to a fifth configuration of the present invention is the control information transmission system according to any one of the first to fourth configurations, wherein the multiplex transmission master station prevention unit is a time other than the transmission timing of the own station. Further, it is characterized in that a collision of information transmission in the system is avoided by confirming the status of transmission processing of other stations.

  A control information transmission system according to a sixth configuration of the present invention is the control information transmission system according to any one of the first configuration to the fifth configuration, wherein the multiplex transmission master station prevention unit confirms a use status of the received signal. Thus, a collision of information transmission in the system is avoided.

  A control information transmission system according to a seventh configuration of the present invention is the control information transmission system according to any one of the first to sixth configurations, wherein the transmission station that can be the transmission master station transmits a control signal for controlling the elevator. A master controller that cyclically transmits serially, a hall controller that receives the control signal of the elevator that is serially transmitted serially from the master controller via a transmission line, and a car controller.

  A control information transmission system according to an eighth configuration of the present invention is the control information transmission system according to any one of the first configuration to the seventh configuration, wherein the transmission station that can be the transmission master station is an individual group by a plurality of elevators. And a group management master controller that serially transmits a control signal in order to control individual groups in the elevator group management system.

  According to the control information transmission system configured as described above, when an abnormality occurs in a transmission station functioning as a transmission master station, other transmission stations continue to function as the transmission master station in the transmission system. There is an effect that a stable operation can be ensured for continuous transmission control without stopping data transmission and eliminating software operations that tend to be unstable.

  Hereinafter, embodiments of a control information transmission system according to the present invention will be described in detail with reference to the accompanying drawings. As described above, the present invention can be applied to a control information transmission system for elevators and a control information transmission system in various monitoring systems. Therefore, the first to third embodiments are not limited to a specific technical field and are opposed to each other. A general control information transmission system that controls transmission of a control signal that is cyclically transmitted serially between at least two transmission stations will be described, and the configuration of the fourth and subsequent embodiments will be described particularly as an elevator control information transmission system. Will be explained with emphasis.

[First Embodiment]
FIG. 1 is a block diagram showing a configuration of a control information transmission system according to a first embodiment as a basic concept of the present invention. In FIG. 1, a control information transmission system 10 is provided in each of at least two of a plurality of master controllers 1a, 1b,... 1m, 1n that can be transmission master stations, and cyclically between these transmission stations. A control information transmission system 10 including a transmission control circuit 12 for controlling transmission of a control signal transmitted serially constitutes a signal transmission network by the transmission line 3. In this control information transmission system 10, the transmission control circuit 12 includes a station number holding unit 20 that holds a unique station number for each of the master controllers 1 a to 1 n and a transmission processing operation as a transmission master station. The other station operation discriminating unit 21 discriminates the transmission processing operation of the other station from the station number of the other station, and the other station operation discriminating unit 21 discriminates that the other station is performing the transmission processing operation as the transmission master station. A multiplex transmission master station prevention unit 27 that stops the operation of the transmission master station at the local station and prevents the occurrence of multiplex transmission master stations.

  According to the control information transmission system 10 according to the first embodiment, since the station number holding unit 20 holds the station number of each transmission station in the transmission control circuit 12 of each transmission station, a master that can be a transmission master station. All of the controllers 1a to 1n execute various transmission processing operations with unique station numbers. Therefore, which transmission station that can be a transmission master station in the transmission system 10 is currently functioning as a transmission master station can be determined from other transmission stations by the station number of the transmission station.

  In FIG. 1, the other station operation discriminating unit 21 discriminates the operation of the other station by monitoring the transmission / reception of the control signal of the other station via the transmission line 3. The monitoring of the control signal is performed by monitoring the length of the transmission time according to the set time of a timer that incorporates it, or by analyzing a command included in the control signal. Further, the multiplex transmission master station prevention unit 27 is configured to prevent a situation where a plurality of stations among the transmission stations that can be transmission master stations in the control information transmission system 10 have a function as a transmission master station. The priority is determined from the transmission time of the control signal, the command included in the control signal, or the like, and the transmission station to be operated as the transmission master station is determined. Specific operations of the other station operation determination unit 21 and the multiplex transmission master station prevention unit 27 will be described in detail in the second and third embodiments.

  Next, a system configuration of the control information transmission system according to the first embodiment will be described with reference to FIG. In FIG. 2, a control information transmission system 10 includes first to nth (n is a positive integer) master controllers 1 that can be transmission master stations, and first to mth (m is a positive integer) slave-dedicated controllers. 2 is connected via a transmission line 3. The first to n-th master controllers 1 that can be transmission master stations have a function of performing independent system control and executing operations as transmission master stations. The slave dedicated controller 2 does not have a function capable of executing an operation as a transmission master station, but has only a function of transmitting and receiving data.

  Next, a detailed configuration of the master controller 1 that can be a transmission master station will be described with reference to FIG. The host CPU 11 performs control / transmission data contents for each system and connects the transmission control circuit 12 to the bus control signal 15 and the local bus 18. The transmission control circuit 12 is connected by a common RAM 14 and a RAM input / output 19 in which transmission setting data and transmission input / output data are stored.

  The host CPU 11 outputs an access request to the common RAM 14 to the transmission control circuit 12, and the transmission control circuit 12 inputs / outputs data to / from the common RAM 14. The transmission control circuit 12 is connected to the transmission line 3 via an interface 13 such as RS485. When receiving a transmission execution command from the host CPU 11, the transmission control circuit 12 reads transmission operation setting data from the common RAM 14 and performs transmission / reception processing according to the content of the data.

  Next, the internal configuration of the transmission control circuit 12 used in the master controller 1 will be described with reference to FIG. The control signal bus 15 and the local bus 18 are connected to the bus interface 30. In the configuration of the master controller 1, it is connected to the host CPU 11, and the bus interface 30 stores operation settings from the host CPU 11 in an internal register. This operation setting includes transmission start, operation mode, timeout time, and the like. In addition, transmission abnormality information relating to the state and number of occurrences of transmission abnormality is stored in an internal register so that it can be read from the host CPU 11. The operation setting and transmission abnormality information are exchanged with the transmission interface circuit 32 via the transmission IF / bus IF input / output signal 38.

  When there is an access request to the common RAM 14, the bus interface 30 connects to the RAM interface 31 using a bus IF / RAM input / output signal 37. The RAM interface 31 is connected to the common RAM 14 and the RAM input / output 19 in the configuration of the master controller 1. The contents of the setting register stored in the bus interface 30 are transmitted to the process control circuit 36 through the bus IF / process control circuit input / output signal 41.

  The transmission interface circuit 32 receives the operation setting signal from the bus interface 30 via the transmission IF / bus IF input / output signal 38 and starts the transmission operation. In this case, the RAM interface 31 is requested to read the setting data, and the data is acquired via the transmission IF / RAM input / output signal 40. Based on the result, input / output of the transmission signal 16 and the reception signal 17 to the transmission line 3 is performed. The transmission interface circuit 32 transmits the transmission state in the transmission line 3 to the process control circuit 36 via the transmission IF / process control circuit input / output signal 43.

  The RAM interface 31 receives three types of requests: a transmission IF / process control circuit input / output signal 40, a bus IF / RAM input / output signal 37, and a RAMIF / process control circuit input / output signal 42, and selects one of them. Data is input / output to / from the common RAM 14 using the RAM input / output signal 19.

  The process control circuit 36 checks the transmission status and switches the operation of the transmission master station as necessary. The bus interface / process control circuit input / output signal 41 is used to receive setting content information with the bus interface 30 and also transmits information about whether or not the transmission master station is operating. The transmission interface circuit 32 obtains the transmission state using the transmission IF / process control circuit input / output signal 43 and sets the operation of the transmission master station. The RAM interface 31 inputs / outputs setting information and transmission data stored in the RAM 14 through the RAMIF / process control circuit input / output signal 42.

  A transmission operation in the control information transmission system 10 based on the above configuration will be described with reference to FIG. FIG. 5 is a flowchart for explaining the transmission / reception operation of the transmission information of the control information transmission system 10 in the first embodiment. FIG. 5 shows an operation at the time of transmission, and FIG. 5A shows a master talker transmission operation, which is used when information is transmitted from the master station to the slave station. First, an address is transmitted from the master station, and data is subsequently transmitted after the transmission is completed. After that, it waits for a response from the slave station. The slave station waits for receiving an address, and if the address is assigned to itself, receives the transmitted data and outputs it to an external display or the like.

  FIG. 5B shows a master listener transmission operation, which is used when information is transmitted from the slave station to the master station. The master station transmits an address and waits for data reception after the transmission is completed. The slave station waits for receiving an address, and when the transmitted address matches the address assigned to itself, the slave station inputs data from the outside and transmits the data. The master station receives data sent from the slave station and stores it as data.

  Next, processing for determining a master station performed in the process control circuit 36 of the control information transmission system of the first embodiment will be described with reference to the flowchart of FIG. In the process control circuit 36, it is discriminated whether it operates as a transmission master station or a transmission slave station according to the flowchart shown in FIG.

  In FIG. 6, when the determination operation is started, it is determined in step ST1 whether or not the host CPU is normal. When it is confirmed that it is normal, in step ST2, processing is performed in accordance with the operation designation of the host CPU. If it is determined in step ST1 that the host CPU is not normal (including operation stop due to power supply stop or the like), it is determined in step ST3 whether or not the process control circuit 36 should perform master operation from the transmission state. In this case, first, at step ST4, it is determined whether or not the other station is operating as a master. If it is determined that the other station is operating as a master, the station is changed to a transmission slave station in step ST5 to prevent an abnormal transmission state from occurring due to the presence of a plurality of transmission master stations. Exit.

  In this embodiment, there are two types of methods for determining that there is another transmission master station. The first method is a case where an address is received in a data reception waiting state after address transmission (second Configuration of Embodiment) The second method is a method of detecting that address / data transmission from another station has occurred before address transmission (configuration of the third embodiment). By adopting these methods, it is possible to avoid the simultaneous generation of transmission data.

  When it is determined in step ST4 that the other station is not operating as a master, it is determined in step ST6 whether or not switching request data is included in the received data. If it is determined that the switching request data is included, the transmission slave operation is changed in step ST7. If it is determined that the switching request data is not included, that is, if there is no other master station and there is no switching request, the transmission master operation is continued in step ST8.

  If it is determined in step ST3 that the master operation is not performed, that is, if the slave operation is being performed, it is determined in step ST9 whether or not the other station is a transmission master station and a normal host station. If it is determined that the other station is a normal host station, the slave operation is continued in step ST10. If there is no normal host station in the other station and transmission is stopped, the monitoring timer is operated, and it is determined in step ST11 whether the monitoring timer has been counted up.

  When it is determined in step ST11 that the monitoring timer has been counted up, the process proceeds to step ST12, and the operation as a transmission master station is performed. If it is determined in step ST11 that the monitoring timer has not been counted up, the slave operation is continued in step ST13.

  The value calculated based on the transmission station address is adopted as the timer value of the monitoring timer for determining whether or not the count is up. A specific example is “Tw = 2 seconds + 0.5 seconds * station address number”. By using this monitoring timer, when the transmission master station stops, the other master controller that was operating as a slave can become the transmission master station, and the transmission stop state in the control information transmission system can be avoided smoothly. Control information can be transmitted.

  The transmission master station discrimination processing operation in the first embodiment described above is realized using a hardware circuit, and its specific hardware configuration is shown in FIG. 1 as the highest concept. The discrimination of the transmission master station by such a hardware configuration is not affected by the load caused by other processing operations, and stable operation can be realized as compared with the case where it is realized by software operation. It becomes. The configuration in FIG. 1 is the most conceptual configuration, but there are control information transmission systems according to the second embodiment shown in FIG. 7 and the third embodiment shown in FIG. 8 as more specific configurations.

  Next, a control information transmission system according to the second embodiment of the present invention will be described with reference to FIG. In FIG. 7, the control information transmission system 10 according to the second embodiment is configured so that the other station operation determination unit 21 in the control information transmission system according to the first embodiment is transmitted to each station by a unique station number held by the station number holding unit 20. A monitoring unit 22 that monitors the status of transmission processing, and a priority determination unit 23 that determines the priority of transmission processing depending on the station number corresponding to the length of transmission interruption time based on the monitoring result of the monitoring unit 22 And the multiple transmission master station prevention unit 27 switches the transmission station to be the transmission master station based on the priority of the transmission processing determined by the priority determination unit 23 and performs the transmission processing of the control signal. This is constituted by the switching unit 28 to be continued.

  The control information transmission system 10 according to the second embodiment realizes the discrimination operation of steps ST9 to ST13 in the control information transmission system according to the first embodiment described with reference to FIG. Includes a timer 24 for monitoring the transmission interruption time in cooperation with the monitoring unit 22. The determination operation of FIG. 6 described in the first embodiment is processed by the monitoring unit 22, the priority determination unit 23, the timer 24, and the switching unit 28.

  Next, a control information transmission system according to a third embodiment of the present invention will be described with reference to FIG. In FIG. 8, the control information transmission system 10 of the third embodiment analyzes the switching command in the transmission information including at least the station number by the other station operation determination unit 21 in the control information transmission system according to the first embodiment. A command analyzing unit 25, a transmission station determining unit 26 for determining a transmission station to be a transmission master station based on an analysis result of the command analyzing unit 25, and a multiplex transmission master station preventing unit 27 are configured as a transmission station. The transmission unit determined by the determination unit 26 includes a switching unit 28 that switches the transmission station to be a transmission master station and continues the transmission process of the control signal.

  The control information transmission system 10 of the third embodiment shows a hardware configuration corresponding to steps ST1 to ST8 in the flowchart of FIG. 6 describing the determination operation of the first embodiment. 8 shows only the details of the configuration of the first embodiment. However, the hardware configuration of both the second embodiment of FIG. 7 and the third embodiment of FIG. 8 is combined. May be.

  Although not described with reference to individual drawings, control information transmission systems according to fourth to eighth embodiments will be described based on the configuration of the first embodiment shown in FIGS.

  The control information transmission system according to the fourth embodiment of the present invention is the same as the control information transmission system 10 according to any one of the first to third embodiments shown in FIGS. When the transmission operation of the control signal of the other station is detected during the transmission operation, and the multiplex transmission master station prevention unit 27 detects that the other station is operating as the transmission master station by the other station operation determination unit 21. The operation as a transmission master station in the own station may be canceled to prevent the occurrence of multiple transmission master stations.

  Next, the control information transmission system according to the fifth exemplary embodiment of the present invention is the multiple transmission master station prevention unit in the control information transmission system 10 according to any one of the first configuration to the fourth configuration shown in FIGS. 21 is configured to avoid a collision of information transmission in the system by checking the status of the transmission processing of the other station at a time other than the transmission timing of the own station. Specifically, a configuration for avoiding a collision of information transmission in the system may be provided as a hardware configuration of the multiplex transmission master station prevention unit 27 in FIG.

  A control information transmission system according to the sixth embodiment of the present invention is the control information transmission system according to any one of the first to fifth embodiments shown in FIGS. The system is configured to avoid collision of information transmission in the system by confirming the usage status of the received signal.

  A control information transmission system according to the seventh embodiment of the present invention is a transmission station 1 that can be a transmission master station in the control information transmission system according to any one of the first to sixth embodiments shown in FIGS. Is a master controller that cyclically transmits a control signal for controlling the elevator cyclically, a hall controller that receives the control signal of the elevator that is serially transmitted serially from the master controller 1 via the transmission line 3, and a car controller. May be included. The control information transmission system according to the seventh embodiment is an embodiment in which the present invention is incorporated into an elevator control information transmission system.

  A control information transmission system according to an eighth embodiment of the present invention is a transmission station that can be the transmission master station in the control information transmission system according to any of the first to seventh embodiments shown in FIGS. 1 is configured to include a group management master controller that cyclically serially transmits control signals to control individual groups in an elevator group management system that configures individual groups by a plurality of elevators.

  As described above, the control information transmission system according to the present invention can be applied to any transmission system as long as the control signal cyclically transmits the control signal serially. It is more effective when applied to the system. Although it is effective when applied to a control information transmission system in one elevator, it is more effective when applied to an elevator control information transmission system that manages a group of a plurality of elevators.

The block diagram which shows the structure of the control information transmission system of 1st Embodiment. The block diagram which shows the system configuration | structure of 1st thru | or 7th embodiment. The block diagram which similarly shows the structure of a master controller. The block diagram which similarly shows the detailed structure of a transmission control circuit. The time chart which similarly shows transmission control operation | movement. The flowchart which similarly shows discrimination | determination operation | movement. The block diagram which shows the structure of the control information transmission system of 2nd Embodiment. The block diagram which shows the structure of the control information transmission system of 3rd Embodiment.

Explanation of symbols

1 Master controller (Transmission station that can be a transmission master station)
3 Transmission line 10 Control information transmission system 12 Transmission control circuit (Transmission station that can be a transmission master station)
20 Station number holding unit 21 Other station operation determination unit 22 Monitoring unit 23 Priority determination unit 24 Timer 25 Command analysis unit 26 Transmission station determination unit 27 Multiplex transmission master station prevention unit 28 Switching unit

Claims (8)

In a control information transmission system comprising a transmission control circuit that is provided in each of at least two transmission stations that can be a transmission master station and controls transmission of a control signal that is serially transmitted between these transmission stations.
The transmission control circuit includes:
A station number holding unit that holds a station number unique to each of the transmission stations;
Other station operation discriminating unit for discriminating the transmission processing operation of the other station by the station number of the other station during the transmission processing operation as the transmission master station,
When the other station operation discriminating unit determines that the other station is performing the transmission processing operation as the transmission master station, the operation of the transmission master station in the own station is stopped to prevent the generation of the multiplex transmission master station. A multiplex transmission master station prevention unit;
A control information transmission system comprising: The other station operation determination unit includes a monitoring unit that monitors the status of transmission processing in each station using the unique station number held by the station number holding unit, and the length of transmission interruption time based on the monitoring result of the monitoring unit. And a priority determination unit that determines the priority of transmission processing depending on the station number, and
The multiple transmission master station prevention unit switches a transmission station to be a transmission master station based on the priority of the transmission processing determined by the priority determination unit, and continues the transmission processing of the control signal The control information transmission system according to claim 1, further comprising: The other station operation determining unit is configured to analyze a switching command in transmission information including at least the station number, and to determine a transmission station to be a transmission master station based on an analysis result of the command analyzing unit. A station determining unit,
The multiple transmission master station prevention unit includes a switching unit that switches the transmission station to be a transmission master station to the transmission station determined by the transmission station determination unit and continues the transmission process of the control signal. The control information transmission system according to claim 1 or 2. Prior Symbol another station operation determination unit detects a transmission operation of the control signals of other stations during the master transmission operation of the own station,
When the other station operation determination unit detects that the other station is operating as a transmission master station, the multiple transmission master station prevention unit cancels the operation as the transmission master station in the local station. 4. The control information transmission system according to claim 1, wherein occurrence of a multiplex transmission master station is prevented.   The multiplex transmission master station prevention unit avoids a collision of information transmission in the system by confirming the status of transmission processing of another station at a time other than the transmission timing of the own station. The control information transmission system according to any one of claims 1 to 4. Before Symbol multiplexing transmission master station prevention part, by confirming the usage of the received signals, according to any one of claims 1 to 5, characterized in that to avoid a collision of information transmission within the system Control information transmission system.   The transmission station that can be the transmission master station receives the control signal of the elevator that is serially transmitted from the master controller via the transmission line, the master controller that cyclically transmits the control signal that controls the elevator. 7. A control information transmission system according to claim 1, further comprising a hall controller and a car controller.   The transmission station that can be the transmission master station includes a group management master controller that serially transmits control signals cyclically to control individual groups in an elevator group management system that constitutes individual groups by a plurality of elevators. A control information transmission system according to any one of claims 1 to 7.

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