JP3215763B2 - Cyclic communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cyclic communication device,
In other words, the present invention relates to a communication device that is less susceptible to noise by repeatedly transmitting the same data frame.

[0002]

2. Description of the Related Art In recent years, as automobiles have become more and more electronic, basic controls of an automobile including a steering system such as engine control, brake control, and four-wheel steering have been electronically controlled, and windows have been opened and closed. Controls, wiper controls, and even air conditioners, audio devices, and the like are being controlled in a unified manner. Specifically, conventionally, transmission of a control signal from a control center to various actuators, for example, a motor, a relay, and the like, and transmission of a detection signal from various sensors to a control center have been individually performed by individual wire harnesses. Is performed by data communication using multiplex communication by a so-called in-vehicle LAN. There is a social demand to reduce vehicle weight in terms of environmental pollution countermeasures and energy savings.
In order to reduce the weight of the wire harness and save resources by utilizing the method, a method is adopted.

In data communication in a car, the car itself contains many sources of electronic noise, and if a malfunction occurs due to a data error, it directly leads to human life. Therefore, noise countermeasures become an important issue.

[0004] From such a viewpoint, a communication method called so-called cyclic communication is often adopted for data communication in a car. Cyclic communication is a communication method for repeatedly transmitting the same data frame. conventionally,
When driving the motor as an actuator continuously, first send a signal to start driving the motor,
Thereafter, a method of transmitting a signal for stopping the motor has been adopted. In such a method, if a signal contains an error, a malfunction is definitely caused. However, in cyclic communication, the motor is driven by sending the signal to drive the motor continuously during that time,
When it is not necessary to drive the motor, a signal for stopping the motor is continuously and repeatedly transmitted. In such cyclic communication, even if a data error occurs in one data frame due to instantaneous noise, if the other data frame repeatedly transmitted is normal, the actuator as a whole is normal. , And as a result, malfunction is avoided. However, in this case, the cyclic interval, that is, the data frame transmission interval, needs to be shorter than the operation delay time of the actuator such as the motor or the relay.

[0005]

However, in the above-described cyclic communication, when a periodic noise generated in an ignition system of an engine or the like and a transmission interval of the data frame coincide with each other, a plurality of data frames are transmitted. , An error may continuously occur in the same portion, resulting in malfunction of the actuator.

The present invention has been made in view of such circumstances, and when performing cyclic communication, correct information can be obtained even in a situation where the cyclic interval of the data frame and the noise generation cycle substantially coincide. Therefore, it is an object of the present invention to provide a cyclic communication device capable of transmitting normal communication and performing normal communication, and thus avoiding malfunction of the actuator.

[0007]

SUMMARY OF THE INVENTION In brief, a cyclic communication apparatus according to the present invention has a bit storing a plurality of tables in which a plurality of pieces of information to be transmitted to a transmitting side apparatus are respectively pre-assigned to different bits. The table storage unit is provided with a bit table storage unit having the same content as that of the reception side device.

Further, the cyclic communication device according to the present invention is provided with a random number generator so as to sequentially select and use a plurality of tables one by one in a preset order, or a transmitting device. According to the generated random number, the order of use of the tables is determined, the tables are used one by one, and a code for identifying the table is transmitted.

Further, the cyclic communication device according to the present invention is configured such that at least one switch is connected to the device on the transmitting side and the ON / OFF information is taken in, in addition to the above-described respective configurations. At least one load is connected to the device on the receiving side, and is configured to control its driving.

[0010]

In the cyclic communication device according to the present invention, when transmitting information from the transmitting device, one of a plurality of tables in which the same information is pre-assigned to different bits is selected, and according to the selected table. A transmission data string in which a value is set in a bit corresponding to information to be transmitted is generated and repeatedly transmitted. In the device on the receiving side, the received bit string is collated with the contents of the corresponding table to extract information.

Further, in the cyclic communication device according to the present invention, a plurality of tables are sequentially selected one by one in a preset order, and are transmitted from the transmitting device in accordance with the selected table, and are transmitted to the receiving device. However, the tables are used in the same order as the transmitting device. Each table is added with an identification code in the order determined by the transmission side device by random number generation, and is sequentially transmitted from the transmission side device. The receiving side device uses the table according to the identification code.

Further, in the cyclic communication device according to the present invention, the ON / OFF information of the switch connected to the transmitting device is taken in and transmitted by any of the above-mentioned methods. The device on the receiving side controls whether to drive the connected addition according to the reception result.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is a schematic plan view of a general automobile (normal passenger car) to which the cyclic communication device of the present invention is applied.

The cyclic communication device according to the present invention employs the NRZ (Non Return to Zero) system, which is applicable if the bit value is "1"("H" level of a binary signal). Actuation of an actuator (motor)
When the bit value is "0"("L" level of the binary signal), it means that the actuator is not operated, in other words, when the bit value is "1", the corresponding actuator (motor) is controlled to operate for a predetermined time. If a switch is continuously turned on, a signal for driving the corresponding actuator is repeatedly generated, and the switch is turned on. When the state is changed from the off state to the off state, a signal for deactivating the corresponding actuator is generated.

In FIG. 1, reference numeral FR denotes a front right window (usually a driver window), FL denotes a front left window, RR denotes a rear right window,
RL indicates the rear left window, respectively. MR indicates a right side mirror, and ML indicates a left side mirror.

FIG. 1 shows a cross section in a state in which a right front door with a front right window FR is opened, and a driver operates each window to open and close, adjust the angles of both side mirrors, and the like. A door unit 2 is installed. In the so-called console box in the center of the vehicle, the driver and the passengers have windows (front left window FL, rear right window RR,
A body unit 1 is provided for opening and closing the rear left window RL), adjusting the angle of the left side mirror ML, and the like. The units 1 and 2 are connected by a multiplex transmission line 3.

FIG. 2 is a schematic diagram showing an example of each switch and actuator connected to the body unit 1 and the door unit 2 in one embodiment of the cyclic communication device of the present invention. The body unit 1 includes a motor MFL for opening and closing (up / down) the front left window FL, a motor MRR for opening and closing the rear right window RR, a motor MRL for opening and closing the rear left window RL, and a front left window FL. Switch SFLUP for closing (up), switch SFLDN for opening (down) the left front window FL,
Switch SR to close (up) the rear right window RR
RUP, switch to open (down) the rear right window RR
SRRDN, switch SRLUP to close (up) the rear left window RL, switch SRLDN to open (down) the rear left window RL, motor MMLUD to move the left side mirror ML up and down, and left side mirror ML MMLR to move left and right
L is connected.

The door unit 2 includes a motor MFR for opening and closing the front right window FR, and a switch SFRU for closing the front right window FR.
P, switch SFRDN for opening front right window FR, switch SFLUP for closing front left window FL, switch SFLDN for opening front left window FL, switch SRRUP for closing rear right window RR,
Switch SRRDN for opening the rear right window RR, switch SRLUP for closing the rear left window RL, switch SRLDN for opening the rear left window RL, and switch for moving the side mirrors MR and ML upward. Switch SMDN for moving SMUP, side mirror MR, ML downward, switch SML for moving left mirror MR, ML leftward, side mirror MR, ML
SMR, side mirror for moving the camera to the right
A switch SMSEL for selecting MR and ML, a motor MMRUD for moving the right side mirror MR up and down, a motor MMRRL for moving the right side mirror MR left and right, and a switch SPWLOCK for locking the power window are connected.

Each of the above-mentioned switches is turned on only when the switch is pressed, and the body unit 1 connected to each of the switches is turned on.
And a signal is input to the door unit 2.

FIG. 3 is a block diagram showing an example of the internal configuration of the body unit 1 and the door unit 2. As shown in FIG. The body unit 1 and the door unit 2 are both communication circuits (11, 21),
It comprises a load drive circuit (12, 22), a switch input circuit (13, 23) and a microcomputer (100, 200).

Specifically, the body unit 1 includes a communication circuit 11, a load drive circuit 12, a switch input circuit 13, and a microcomputer 100. Load drive circuit
Various motors as shown in FIG. 2 are connected to 12, and various switches as shown in FIG. 2 are connected to the switch input circuit 13. The door unit 2 includes a communication circuit 21, a load drive circuit 22, a switch input circuit 23, and a microcomputer 20.
It is composed of 0. As shown in FIG.
Various motors are connected as shown in
The switch input circuit 23 is connected to various switches as shown in FIG. The two communication circuits 11 and 21 are connected by the multiplex transmission line 3.

The microcomputer of the body unit 1
100 further includes a control unit 101, a second bit table storage unit 10
2, composed of an identification data reading unit 103, a data reading unit 104, and a reception data assembling unit 105. Also,
The microcomputer 200 of the door unit 2 further includes a control unit 201, a first bit table storage unit 202, a random number generation unit 20.
3 and a transmission data assembling unit 204.

The communication circuit 11 of the body unit 1 and the communication circuit 21 of the door unit 2 communicate with each other by a cyclic communication device of the present invention as described later. The switch input circuit 23 of the door unit 2 receives an input of an ON signal from each of the above-mentioned switches connected to the door unit 2 at predetermined time intervals, and gives the input to the control unit 201 of the microcomputer 200. The load drive circuit 22 drives each of the above-described motors connected to the door unit 2 for a predetermined time according to a control signal given from the control unit 201. The bit table storage unit 202 stores a bit table as described later. The random number generation unit 203 generates a random number as appropriate, and supplies it to the transmission data assembling unit 204.

Therefore, the control unit 201 of the door unit 2
When an ON signal is input from the switch input circuit 23 and instructs to drive a motor connected to the door unit 2, the load drive circuit 22 is controlled to drive the corresponding motor for a predetermined time. . Therefore, when the ON signal from the same switch is continuously generated, the corresponding motor is continuously driven. The control unit 201 transmits data to be transmitted to the body unit 1 when the ON signal is input from the switch input circuit 23 and when the ON signal is instructed to drive the motor connected to the body unit 1. This is given to the data assembling unit 204.

The transmission data assembling section 20 of the door unit 2
4 assembles an 8-bit data frame to be transmitted to the body unit 1 and outputs it to the communication circuit 21. In this embodiment, the transmission data assembling unit 204 repeatedly transmits data to be transmitted to the body unit 1. Specifically, when the data to be given to the body unit 1 is given from the control unit 201 as described above, the transmission data assembling unit 20
4 reads out, for example, four types of bit tables from the bit table storage unit 202 in a predetermined order, or reads out bit tables corresponding to random numbers generated by the random number generation unit 203 from the bit table storage unit 202 sequentially, 6-bit transmission data is assembled in accordance with the contents of the above, and 2-bit identification data for identifying which bit table is used is further added to the upper side of the 6-bit data to assemble an 8-bit data frame. To the communication circuit 21.

The communication circuit 21 of the door unit 2 transmits the 8-bit data frame to the body unit 1 through the multiplex transmission line 3 since the transmission data assembling unit 204 periodically gives the 8-bit data frame.

Switch input circuit 13 of body unit 1
Receives an input of an ON signal from each of the above-mentioned switches connected to the body unit 1 and gives the input to the control unit 101 of the microcomputer 100. The load drive circuit 12 controls each of the aforementioned motors connected to the body unit 1 by a control unit.
In accordance with the control signal given from 101, control is performed so as to drive for a predetermined time. Bit table storage unit 102
Is a bit table storage unit of the door unit 2 as described above.
A bit table having the same contents as 202 is stored. The identification data readout unit 103 reads out the upper 2 bits of identification data in the data frame received from the door unit 2 by the communication circuit 11 and supplies the data to the reception data assembling unit 105.
The data reading unit 104 reads the lower 6 bits of data in the data frame received by the communication circuit 11 from the door unit 2 and supplies the data to the received data assembling unit 105.

Therefore, the control unit 101 of the body unit 1
When the ON signal is input from the switch input circuit 13, it indicates that the motor connected to the body unit 1 should be driven, so that the load driving circuit 12 is controlled to drive the corresponding motor for a predetermined time. . For this reason,
When the ON signal from the same switch is continuously received by the control unit 101 of the body unit 1, the corresponding motor is continuously driven.

In the received data assembling unit 105, the upper two bits of the 8-bit data frame received by the body unit 1 are sent from the identification data reading unit 103 and the lower six bits are sent from the data reading unit 104, respectively. Given. Reception data assembling section 105 first reads a bit table from bit table storage section 102 in accordance with the 2-bit identification data provided from identification data reading section 103, and compares this table with 6-bit data provided from data reading section 104. By doing so, the original signal transmitted from the door unit 2 is recognized and given to the control unit 101. As described above, since the door unit 2 periodically transmits data, the received data assembling unit 105 sequentially recognizes the data on the body unit 1 side.

The received data assembling section 105 gives the result of recognition as described above to the control section 101. The control unit 101 controls the load drive circuit 12 in accordance with the recognition result given from the data read unit 104 as described above, so that the switch input circuit 23 of the door unit 2 in the motor connected to the body unit 1 is controlled. And drives the motor corresponding to the ON signal input to the CPU for a predetermined time.

FIG. 4 is a schematic diagram showing a configuration of a data frame transmitted and received between the door unit 2 and the body unit 1 by the cyclic communication device of the present invention. The data frame transmitted / received by the cyclic communication device of the present invention is started with one “L” level start bit after “H” level continues for a predetermined number of bits or more, and the following two bits (bits 0 and 1) Is assigned to an identification code for identifying which of the four types of bit tables described later are used, and the subsequent 6 bits (bits 2 to
7) is data.

FIG. 5 shows that the four values of the identification code composed of bits 0 and 1 are stored in the bit table storage unit 102 of the body unit 1 and the bit table storage unit 202 of the door unit 2. FIG. 6 is a table showing which of the same four types of bit tables is selected.
Is a list showing an example of specific contents of the bit tables having the same contents stored in the bit table storage unit 102 of the body unit 1 and the bit table storage unit 202 of the door unit 2.

As shown in FIG. 6, four types of tables 1 to 4 are preset in the bit table. For example, if bit 2 of table 1 is "1", it indicates that front seat left window FL is to be closed (up).
In this case, control is performed so that the motor MFL rotates in the direction in which the front seat left window FL closes. Similarly, if bit 3 of Table 1 is "1", it indicates that the rear right window RR is closed, and if bit 4 is "1", it indicates that the rear left window RL is closed. If 5 is “1”, it indicates that the front seat left window FL is to be opened (down), and bit 6 is “1”.
If "1", the rear right window RR is opened, and if the bit 7 is "1", the rear left window RL is opened.

In other words, when communication is performed from the door unit 2 to the body unit 1 using the table 1, the transmission data assembling section 204 of the door unit 2 sets the identification code to "00", If the control unit 201 instructs the control unit 201 to raise the window FL and lower the rear right window RR, the transmission data assembling unit 204 performs the processing in the table 1 at 6
Set the bit data to “100010”, and as a whole “001000
An 8-bit data frame "10" is generated and provided to the communication circuit 21.

When information similar to that described above is communicated using, for example, table 3, transmission data assembling section 204
Sets the identification code to "10" and the data to "011000" to generate an 8-bit data frame "10011000" as a whole.

By the way, in the same bit of the four types of tables stored in the bit table storage unit 202 and the bit table storage unit 102, for example, bit 2, in the table 1, the front left window FL is raised as described above. In Table 2, rear left window RL is raised, in table 3, rear right window RR is raised, and in table 4, rear right window RR is lowered. Therefore, the same information cannot be assigned.
Similarly, the same information is not assigned to the other bits 3 to 7.

The following two methods are conceivable as to how to communicate by combining the above four types of tables.

The first method is a method in which the order of combinations is determined in advance. For example, tables 1, 2,
It is used repeatedly and transmitted in the order of 3,4. In this case, if the use order of the table is determined in advance between the transmission side and the reception side, a data frame that does not actually make sense, for example, in which all 8 bits are “1”, is transmitted as a signal to start communication. After that, by transmitting the data using the table in a predetermined order, the identification code can be made unnecessary. Therefore, when the first method is adopted, it is possible to configure a data frame with 6 bits obtained by removing 2 bits of the identification code, or to use all 8 bits as data.

The second method is a method in which a table to be used is determined on the transmission side using random numbers. In this case, the identification code becomes indispensable.

The operation of the above-described cyclic communication device of the present invention will be described below. First, for example, it is assumed that the driver continues to turn on the switch SFRUP of the door unit 2 in order to close the opened front right window FR. As a result, the switch SFRUP is maintained in the ON state, and the ON signal is taken into the switch input circuit 23 of the door unit 2 at predetermined time intervals. The control unit 201 of the door unit 2 supplies a control signal to the load drive circuit 22 because the motor MFR, which is an actuator corresponding to the ON signal input to the switch input circuit 23, is connected to itself. As a result, the motor MFR is continuously controlled by the load drive circuit 22, and is driven in the direction in which the front right window FR closes.

Thereafter, the driver operates the switch SFRUP
Is turned off, it is taken into the switch input circuit 23 of the door unit 2, the driving of the motor MFR is stopped, and the driving of the front seat right window FR is also stopped.

Next, for example, when the driver tries to close the open rear left window RL, the switch SRLUP of the door unit 2 is opened.
Is turned on. This allows the switch SRLUP
Is maintained in the ON state, and the ON signal is input to the switch input circuit 23 of the door unit 2 at predetermined time intervals. The control unit 201 of the door unit 2 is a motor which is an actuator corresponding to the ON signal input to the switch input circuit 23.
Since the MRR is connected not to itself but to the body unit 1, communication with the body unit 1 is performed in the following procedure.

First, when the above-described first method is adopted, that is, the order of use of the bit table is determined in advance, for example, in Table 1,
A case in which 2, 3, and 4 are determined in advance will be described.

The control section 201 gives a signal to the transmission data assembling section 204 that the switch SRLUP for raising the rear left window RL is turned on. The transmission data assembling section 204 first causes the communication circuit 21 to transmit a data frame in which all 8 bits are “1”. Next, the transmission data assembling unit 204 stores the table 1 from the bit table storage unit 202.
Is read, and bit 4 is assigned as a bit for raising the rear left window RL, so that data of “001000” is generated, and an 8-bit data frame is added together with the identification code “00” meaning Table 1. 00001000 ”is generated. The 8-bit data frame is transmitted from the communication circuit 21 to the communication circuit 11 of the body unit 1.

Next, the control unit 201 of the door unit 2 checks the presence or absence of a signal input from any of the switches.
Table 2 is read out from the table, and bit 1 is assigned as a bit for raising the rear left window RL.
0000 "data and an 8-bit data frame" 0110 "together with the identification code" 01 "meaning Table 2.
0000 ". This data frame is transmitted to the communication circuit 21.
Is transmitted to the communication circuit 11 of the body unit 1.

Further, the control unit 201 of the door unit 2 checks the presence or absence of a signal input from one of the switches.
Table 3 is read out from the table, and bit 5 is assigned as a bit for raising the rear left window RL.
0100 ”data and an 8-bit data frame“ 1000 ”together with the identification code“ 10 ”meaning Table 3.
0100 ". This data frame is transmitted from the communication circuit 21 to the communication circuit 11 of the body unit 1.

Finally, the control unit 201 of the door unit 2 checks the presence or absence of a signal input from any of the switches.
Table 4 is read from 2 and bit 7 is assigned as a bit for raising the rear left window RL.
000001 ”data is generated, and an 8-bit data frame“ 11 ”is added together with the identification code“ 11 ”meaning Table 4.
000001 ". This data frame is transmitted to the communication circuit 21.
Is transmitted to the communication circuit 11 of the body unit 1.

Hereinafter, the same operation is continued until the ON state of the switch SRLUP is released or until another switch is operated. When the ON state of only the switch SRLUP is released from the ON state, the data to be transmitted becomes “000000”. When other switches are turned on, data corresponding to each of them is generated.

The body unit 1 operates according to the following procedure. When the communication circuit 11 of the body unit 1 receives, from the communication circuit 21 of the door unit 2, a data frame of 8 bits “00001000” following a data frame of all 8 bits “1”, the data frame is identified by the identification data reading unit 103.
And a data reading unit 104. The bit table storage unit 102 reads out the upper two bits “00” and supplies it to the received data assembling unit 105, and the data read unit 104 reads out the lower six bits “001000” and supplies it to the received data assembling unit 105. The reception data assembling unit 105 recognizes that the table 1 is used, meaning the meaning of the bit 4 of the value of “1” of the 6-bit data “001000”,
That is, it recognizes that the rear seat left window RL is to be raised.

Data reading section 104 of body unit 1
Controls the signal that means the rear seat left window RL is up
Give to 101. The control unit 101 supplies a control signal to the load drive circuit 22. As a result, the motor MFR is connected to the load drive circuit 22.
Thus, the front right window FR is driven in a direction to close for a predetermined time.

When the next data frame is received by the body unit 1, it is recognized that the rear left window RL is to be raised by the table 2 according to the identification code "01", and a control signal is given to the load drive circuit 22. The drive of the motor MFR is controlled for a predetermined time to drive the front right window FR in the closing direction. Similarly, each time a data frame is received, the motor is driven so that the front right window FR is closed.
The drive of the MFR is controlled, and the front right window FR is continuously driven in the closing direction.

Next, a case where the above-described second method is adopted, that is, a case where a bit table is used according to random numbers will be described. In this case, the transmission data assembling section 204 of the door unit 2 does not transmit a data frame in which all 8 bits are “1”, and first determines which table to use according to the random number generated by the random number generating section 203. decide. If the table to be used is determined, the following procedure is the same as in the above-described case, and an 8-bit data frame is transmitted from the communication circuit 21 to the communication circuit 11 of the body unit 1. Hereinafter, similarly, the data frame is transmitted from the door unit 2 to the body unit 1 according to the random number generated by the random number generation unit 203.

The procedure on the body unit 1 side is the same as in the case described above. When a table to be used on the door unit 2 side is determined according to a random number, a random number is generated and a table is determined corresponding to each.

In the above embodiment, an example is described in which the cyclic communication device of the present invention is applied to an automobile.
The present invention is not limited to this, and can be widely applied to control for continuously driving an actuator. Further, in the above-described embodiment, an example in which the present invention is applied to opening and closing of a window, angle adjustment of a side mirror, and the like has been described. However, the present invention is not limited to this. It is needless to say that the present invention can be applied to a steering system such as a wiper, an air conditioner, and an audio device.

[0055]

As described above in detail, according to the cyclic communication device of the present invention, when the cyclic communication device is implemented, the cyclic interval of the data frame and the generation cycle of the noise substantially coincide with each other. Even in the situation,
Correct information can be transmitted, and normal communication can be performed.

Further, if a plurality of tables are used on the transmitting side and the receiving side in a predetermined order, a code for identifying each table becomes unnecessary, so that the number of bits of the data string to be transmitted can be reduced. , Or more information. Further, when the transmitting apparatus is provided with a random number generation unit and determines the use order of the table according to the generated random numbers, it is not necessary to instruct the start of transmission.

Further, when the present invention is applied to the drive control of the actuator, it is possible to avoid a malfunction, and it is possible to perform accurate control and to avoid a risk associated with the malfunction.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a general automobile (ordinary passenger car) to which a cyclic communication device according to the present invention is applied.

FIG. 2 is a schematic diagram showing an example of switches and actuators connected to a body unit and a door unit of one embodiment of the cyclic communication device of the present invention.

FIG. 3 is a block diagram illustrating an example of an internal configuration of a body unit and a door unit of one embodiment of the cyclic communication device according to the present invention.

FIG. 4 is a schematic diagram showing a configuration of a data frame transmitted and received by the cyclic communication device of the present invention.

FIG. 5 is a list showing a bit table corresponding to the value of the identification code of the cyclic communication device of the present invention.

FIG. 6 is a list showing a content example of a bit table of the cyclic communication device of the present invention.

[Explanation of symbols]

 1 Body unit 2 Door unit 102 First bit table storage unit 103 Identification data read unit 104 Data read unit 105 Receive data assembling unit 202 Second bit table storage unit 203 Bit table storage unit 204 Transmission data assembling unit SFRUP etc. Switch MMRUP etc. Motor (Actuator)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04L 5/22 H04L 1/00 H04Q 9/00 H04L 12/40

Claims (4)

(57) [Claims] 1. A cyclic communication device for repeatedly transmitting and receiving a signal representing information from a transmitting device to a receiving device, wherein the transmitting device (2) has different pieces of information to be transmitted. A first bit table storage unit (202) storing a plurality of tables pre-assigned to bits; and selecting a table from the first bit table storage unit (202) according to a predetermined order. The transmission data assembling unit (2) sets a value to a bit corresponding to information to be transmitted according to and generates a data sequence for transmission.
04), wherein the receiving-side device (1) includes a second bit table storage unit (102) having the same contents as the first bit table storage unit (202), and A data reading unit (104) for recognizing a bit string to be read; each bit string recognized by the data reading unit (104);
A receiving data assembling section (105) for recognizing information by comparing the table with a table sequentially read out from the second bit table storage section (102) in a predetermined order. apparatus. 2. A cyclic communication device for repeatedly transmitting and receiving a signal representing information from a transmitting device to a receiving device, wherein the transmitting device (2) comprises: a random number generator (203) for generating a random number. ), A first bit table storage unit (202) storing a plurality of tables in which a plurality of pieces of information to be transmitted are respectively allocated to different bits in advance, and the random number generation unit (203). 1
Select a table from the bit table storage unit (202) of
A transmission data assembling unit (204) for setting a value to a bit corresponding to information to be transmitted according to the selected table, adding an identification code assigned in advance to each table, and generating a data string for transmission. The receiving device (1) includes a second bit table storage unit (102) having the same contents as the first bit table storage unit (202), and an identification code included in the sequentially received data sequence. An identification data reading unit (103) for recognition, a data reading unit (104) for recognizing a bit sequence included in the sequentially received data sequence, and a bit sequence recognized by the data reading unit (104);
A receiving data assembling section (105) for recognizing information by collating with a table read from the second bit table storage section (102) in accordance with the identification code recognized by the identification data reading section (103). Characteristic cyclic communication device. 3. At least one switch is connected,
A transmission-side control device that captures the on / off information of the switch, and at least one load is connected, and a reception-side control device that controls driving of the load is connected by a transmission line,
In a cyclic communication device that repeatedly transmits and receives a signal representing information between both control devices, the transmission-side control device (2) includes a plurality of switches in which on / off information of the switch is pre-assigned to different bits. A first bit table storage unit (202) storing a table; and a table selected from the first bit table storage unit (202) according to a predetermined order, and corresponding to information to be transmitted according to the selected table. A transmission data assembler (2) that sets a value to a bit to generate a transmission data sequence
04), and the control device (1) on the receiving side includes: a second bit table storage unit (102) having the same contents as the first bit table storage unit (202); A data reading unit (104) for recognizing the included bit string, and each bit string recognized by the data reading unit (104);
A receiving data assembling section (105) for recognizing information by comparing the table with a table sequentially read out from the second bit table storage section (102) in a predetermined order. apparatus. 4. At least one switch is connected,
A transmission-side control device that captures the on / off information of the switch, and at least one load is connected, and a reception-side control device that controls driving of the load is connected by a transmission line,
In a cyclic communication device for repeatedly transmitting and receiving a signal representing information between both control devices, the control device (2) on the transmission side includes: a random number generation unit (203) for generating a random number; A first bit table storage unit (202) storing a plurality of tables in which information is pre-assigned to different bits, and the first random number generation unit (203)
Select a table from the bit table storage unit (202) of
A transmission data assembling unit (204) for setting a value to a bit corresponding to information to be transmitted according to the selected table, adding an identification code assigned in advance to each table, and generating a data string for transmission. The control device (1) on the receiving side includes: a second bit table storage unit (102) having the same content as the first bit table storage unit (202); and a bit sequence included in the sequentially received data sequence. A data read unit (104) to be recognized, and each bit string recognized by the data read unit (104);
A receiving data assembling section (105) for recognizing information by collating with a table read from the second bit table storage section (102) in accordance with the identification code recognized by the identification data reading section (103). Characteristic cyclic communication device.