JP6907407B2 - Control / monitoring signal transmission system address setting method - Google Patents

Description

In the present invention, the signal line between the master station provided on the control side and the plurality of slave stations provided on the controlled side is reduced in wiring, connected by a common transmission line, and synchronized by a transmission clock. It relates to an address setting method for setting the address of a slave station in a control / monitoring signal transmission system that transmits data by a transmission synchronization method.

In a control system including a control unit, a plurality of output units and an input unit, or a plurality of controlled devices, so-called wiring saving, which reduces the number of wirings, is widely implemented. Then, as a general method for saving wiring, a parallel signal and a serial signal are replaced with a parallel connection in which each of a plurality of output units and input units or signal lines extending from a controlled device are directly connected to the control unit. A master station and a plurality of slave stations having a conversion function of are connected to a control unit and a plurality of output units and an input unit, or a plurality of controlled devices, respectively, and common data is shared between the master station and a plurality of slave stations. A method of exchanging data by a serial signal via a signal line is widely adopted.

The slave station used for wiring saving generally does not have a device-specific identifier such as the MAC address of Ethernet. Therefore, in a method in which data is exchanged by a serial signal between a master station and a plurality of slave stations via a common data signal line, a data area of a transmission signal is allocated to each of the plurality of slave stations, and the plurality of slave stations have a plurality of slave stations. By exchanging data with the master station in the data area assigned to each station, collision of transmission and reception of a plurality of slave stations is prevented. Then, an address for obtaining the timing of the data area assigned to the own station of the transmission signal is set in each of the plurality of slave stations.

The address of the slave station is often set by manually operating the address setting switch (DIP switch, etc.) provided for each of the multiple slave stations, but the manual setting is extremely complicated and time-consuming. However, there is a problem that errors are likely to occur.

Therefore, a method has been proposed in which the address data of the slave station is automatically set in the system. For example, Japanese Patent Application Laid-Open No. 3-244954 describes a random address generated by each air conditioner in an air conditioner in which a plurality of air conditioners (slave stations) are connected to one remote controller (master station). A device has been proposed in which the address of each air conditioner is automatically set by using the numerical value for the address generated by the device (random number generator).

Japanese Patent Application Laid-Open No. 3-244954

In the conventional method of using random numbers for address setting, inquiries are made from the master station to the slave station using all the numerical values that may occur as random numbers as addresses, and the presence or absence of duplication is determined by the reply from the slave station. It is confirmed and the setting by generating random numbers is repeated until there is no duplication.

However, if the number of digits (bit range) of the random number is not large enough for the number of connected slave stations, the probability that duplicate addresses will be set will increase, and different addresses will be set for all slave stations. There is a problem that the number of repetitions increases and the time required for address setting becomes long.

On the other hand, by increasing the number of digits of the random number, the probability that duplicate addresses will be set decreases, but the number of inquiries from the master station to the slave station with all the numerical values that may occur as random numbers as addresses. After all, there is a problem that the time required for address setting becomes long.

Further, when data is transmitted by the transmission synchronization method, there are restrictions on the transmission bits, and the number of digits of the random number cannot be increased indefinitely.

Therefore, the present invention is short in a control / monitoring signal transmission system that transmits data by a transmission synchronization method without requiring a setting work for manually operating an address switch or the like provided in each of a plurality of slave stations. An object of the present invention is to provide an address setting method that enables the address of a slave station to be set automatically in time.

The address setting method according to the present invention includes a plurality of slave stations that send and receive data by a transmission synchronization method via a transmission line common to the control side device, and the transmission control data for the slave station is included in the transmission procedure. In a control / monitoring signal transmission system provided with a management data area different from the control / monitoring data area composed of transmission monitoring data superimposed by the slave station, one of a predetermined number of numerical values for each slave station. One is set as the primary temporary address, and the inquiry step, the duplication determination step, the secondary temporary address setting step, and the primary temporary address resetting step are repeated until there is no duplication of the primary temporary address.

In the inquiry step, all numerical values that may be set as primary temporary addresses are sequentially designated from the control side device via the management data area, and an inquiry to the slave station is executed.

In the duplication determination step, the presence or absence of duplication of the primary temporary address is determined based on the reply from the slave station whose designated numerical value matches the primary temporary address via the management data area.

In the secondary temporary address setting step, a secondary temporary address in which a predetermined eigenvalue is added to the unique primary temporary address is generated, and the slave station in which the primary temporary address constituting the secondary temporary address is set is set. The secondary temporary address is set in the management data area.

In the primary temporary address resetting step, the primary temporary address is reset to the slave station in which the primary temporary address having duplication is set.

Then, the eigenvalues constituting the secondary temporary address are set to different values each time the primary temporary address is reset, and the secondary temporary address different for each slave station is set.

The secondary temporary address is sequentially designated via the management data area, and the slave station in which the designated secondary temporary address and the secondary temporary address set in the own station match, via the management data area. Based on the returned profile data, the data area in the control / monitoring data area to be assigned to each of the slave stations is determined, and in the control / monitoring data area of the data area assigned to each of the slave stations. A positive address indicating a start position may be set for each of the slave stations using the secondary temporary address via the management data area.

The profile data indicates the device characteristics of the slave station, and includes the type of input / output and the number of occupied points (occupied address) of the control / monitoring data area.

According to the address setting method according to the present invention, the secondary temporary address generated by adding a predetermined eigenvalue to the primary temporary address is set to a different value each time the primary temporary address is reset. The value will always be different each time the primary temporary address is reset. Therefore, if the number of digits of the primary temporary address is such that a unique value always appears in one setting, it is possible to always set a different secondary temporary address for all slave stations by repeating the resetting. It will be possible. Moreover, even if the primary temporary address is repeatedly reset, the time required for querying all the numerical values that may be set when the number of digits of the primary temporary address is large is shorter than the time required. Therefore, it is possible to automatically set the address of the slave station in a short time.

In addition, a profile in which secondary temporary addresses are sequentially specified via the management data area, and a slave station that matches the specified secondary temporary address and the secondary temporary address set in the own station returns via the management data area. If the data area in the control / monitoring data area to be assigned to each of the slave stations is determined based on the data, the slave stations with different numbers of occupied points in the control / monitoring data area are mixed, and the intervals between the positive addresses are different. Even in this case, the address of the slave station can be set accurately automatically.

It is a system configuration diagram which shows the schematic structure of the control / monitoring signal transmission system which sets an address by the address setting method which concerns on this invention. It is a system configuration diagram of a master station. It is a system configuration diagram of an input slave station. It is a system block diagram of the address setting means. It is a system configuration diagram of an output slave station. It is a schematic diagram of the transmission system between a master station and a slave station. It is a time chart diagram of a transmission clock signal. It is a figure which shows the flow of processing until a positive address is set.

An embodiment of the address setting method according to the present invention will be described with reference to FIGS. 1 to 8.
FIG. 1 is a configuration diagram of a control / monitoring signal transmission system that sets a slave station address by the address setting method according to the present invention. This control / monitoring signal transmission system is for centralized control of a large number of devices and devices arranged in a facility such as a factory in a control unit. As shown in FIG. 2, the master station 2 connected to the control unit 1, the common data signal line DP and DN (hereinafter referred to as a transmission line), and the master station 2 arranged in the facility on the controlled side and connected to the transmission line. It is composed of a plurality of input slave stations 4, output slave stations 5, and input / output slave stations 6. In FIG. 2, for convenience of illustration, each slave station is shown one by one, but there is no limitation on the type and number of slave stations connected to the transmission line.

The input unit 7 to which the input slave station 4 is connected, the output unit 8 to which the output slave station 5 is connected, and the input / output unit 9 to which the input / output slave station 6 is connected are arranged in the facility to be controlled. It is a device.

Examples of the input unit 7 include, but are not limited to, reed switches, micro switches, push button switches, photoelectric switches, and various other sensors.

Examples of the output unit 8 include, but are not limited to, actuators, (stepping) motors, solenoids, solenoid valves, relays, thyristors, and lamps.

The input / output unit 9 is a device having the functions of both the input unit 7 and the output unit 8. For example, a device such as a temperature controller, a timer, or a counter that has both a function of transmitting information to the master station 2 and a function of performing an output operation based on the data transmitted from the master station 2 can be mentioned. can.

The input unit 7 may be an input unit integrated slave station 70 integrated with the input slave station 4. Further, the output unit 8 may be an output unit integrated slave station 80 integrated with the output slave station 5.

The control unit 1 includes a management determination means 11 having an arithmetic processing function and an input / output unit 12. The management determination means 11 receives data from the master station 2 via the input / output unit 12 and performs necessary arithmetic processing based on the program stored inside.

<Structure of master station>
As shown in FIG. 3, the master station 2 includes an output data unit 21, a management data unit 22, a timing generation unit 23, a master station output unit 24, a master station input unit 25, an input data unit 26, and a comparison determination unit 27. .. Then, the control signal, which is connected to the transmission line and is a series of pulse-like signals, is superimposed on the transmission line, and the input slave station 4, the output slave station 5, and the input / output slave station 6 (hereinafter, the input slave station 4 and the output slave) When all of the station 5 and the input / output slave station 6 are targeted, the monitoring data extracted from the monitoring signal superimposed on the transmission line from the slave stations 4, 5, and 6) is used as the input / output unit of the control unit 1. Send to 12.

The output data unit 21 delivers the control parallel data 13 from the output unit 11 of the control unit 1 to the master station output unit 24 as serial data.

The management data unit 22 includes a storage means 29 having a non-volatile function for storing the slave station information table. Then, based on the data received from the control unit 1 and the slave station information table, the data required for instructing the slave station in the management control data area described later is delivered to the master station output unit 24 as serial data.

The slave station information table includes management control address data for designating slave stations 4, 5 and 6, which output information on the slave station side that cannot be obtained as monitoring data to the transmission line. In this embodiment, the data obtained by adding the type identifier to the start address number, which is the data of the positive address according to the system design of the slave stations 4, 5, and 6, is used as the management control address data.

As for the addresses of the slave stations 4, 5 and 6, as described later, the secondary temporary addresses obtained by adding a predetermined eigenvalue to the primary temporary addresses set based on random numbers are set in all the slave stations 4, 5 and 6. After that, the secondary temporary address is used, and the positive address according to the system design is set in all the slave stations 4, 5, and 6. Then, in the management data unit 22, the secondary temporary address table is created and stored by the procedure described later.

The timing generation unit 23 includes an oscillation circuit (OSC) 31 and a timing generation means 32, and the timing generation unit 32 generates a timing clock for this system based on the oscillation circuit (OSC) 31 to generate a master station output unit 24 and a parent. Hand over to the station input unit 25.

The master station output unit 24 includes a control data generating means 33 and a line driver 34. The control data generating means 33 superimposes the transmission signal as a series of pulse-like signals on the transmission line via the line driver 34 based on the data received from the output data unit 21 and the timing clock received from the timing generation unit 23.

As shown in FIG. 6, the transmission procedure is a one-frame cycle following the control / monitoring data area and the management data area between the start signal ST of the transmission signal and the next start signal ST, and a plurality of pulse signals are generated. It is composed in a row. The start signal ST is longer than the time width of the pulse signal and has a potential level higher than the threshold value Vst (18 V in this embodiment) for generating the transmission clock signal from the transmission signal.

As shown in FIG. 7, the pulse signal constituting the transmission signal is composed of a power supply voltage area having a power supply voltage level higher than the threshold value Vst and a low potential area having a potential level lower than the threshold value Vst.

The power supply voltage area corresponds to the transmission clock signal, which is + 24V in this embodiment. The power supply voltage level is not limited and can be appropriately determined according to the usage environment and usage conditions. It may be a negative power supply.

Further, in this embodiment, the power supply voltage area is the latter half of one cycle and the low potential area is the first half of one cycle, but the order is not limited and these orders may be reversed. The same applies when the power supply voltage level is a negative power supply. In the case of a negative power supply, the low potential area in this embodiment is a high potential area with respect to the power supply voltage area.

The width of the low potential area represents the data of the control signal. The width of the low potential area constitutes a control data area as control data, and the control data area corresponds to the upper part of the control / monitoring data area in FIG.

In this embodiment, when one cycle of the pulse signal constituting the transmission signal is t0, the pulse width (3/4) t0 of the pulse signal constituting the transmission signal represents the logical data “1”, and the pulse width (1). / 4) t0 represents the logical data "0". However, as long as it corresponds to the value of the control data input from the control unit 1, the length is not limited and may be appropriately determined.

A current signal is also superimposed on the low potential area, and the presence or absence of this current signal represents the data of the monitoring signal. The current superimposed on the low potential area constitutes a monitoring data area as monitoring data, and the monitoring data area corresponds to the lower part of the control / monitoring data area in FIG.

In this embodiment, the current signal smaller than 10 mA represents the logical data “0”, and the current signal larger than 10 mA represents the logical data “1”.

As shown in FIG. 5, a management data area is provided after the control / monitoring data area. In FIG. 6, the upper row is an area where data is output from the master station 2 (hereinafter referred to as a management control data area), and the lower row is an area where data is input to the master station 2 (hereinafter referred to as a management monitoring data area). ) Is shown.

In the management control data area, the first management control data ISTo that gives instructions such as requesting information to the slave stations 4, 5 and 6 and the second management control data IDXo that specifies the slave station address are the parents. Input from station 2. Further, in the management monitoring data area, the first management monitoring data STi and the second management monitoring data IDXi corresponding to the first management control data ISTo from the slave stations 4, 5 and 6 designated by the second management control data IDXo are located. Entered.

The master station input unit 25 is composed of a monitoring signal detecting means 35 and a monitoring data extracting means 36. The monitoring signal detecting means 35 detects the monitoring signal superimposed on the transmission line from the slave stations 4, 6 and 7.

The monitoring data extracting means 36 delivers the corresponding data value to the input data unit 26 based on the detection result of the monitoring signal in the monitoring signal detecting means 35. In this embodiment, the logical data “1” is delivered to the input data unit 26 when the monitoring signal is detected, and the logical data “0” is delivered to the input data unit 26 when the monitoring signal is not detected.

The input data unit 26 converts the serial input data received from the monitoring data extraction means 36 into parallel data, and sends the monitoring data and the management monitoring data to the input unit 12 of the control unit 1.

At the time of address setting, which will be described later, the monitoring data extraction means 36 delivers the management monitoring data superimposed on the management monitoring data area to the comparison determination unit 27. Then, the comparison and determination unit 27 performs comparison and collation using the element number and the comparison and collation data, which will be described later, and delivers the match or mismatch determination result to the management data unit 22.

<Configuration of input slave station>
As shown in FIG. 3, the input slave station 4 has a transmission / reception means 41, a management control data extraction means 42, an address extraction means 43, a profile data storage means 44, a management monitoring data transmission means 45, an input means 46, and a monitoring data transmission. A slave station input unit 40 having means 47, management control instruction determination means 48, and address setting processing means 49 is provided. Further, a slave station line receiver 51 and a slave station line driver 52 arranged between the slave station input unit 40 and the transmission line are provided.

The input slave station 4 of this embodiment includes an MCU which is a microcomputer control unit as an internal circuit, and this MCU functions as a slave station input unit 40.

Calculations and storage required for processing are executed using the CPU, RAM, and ROM provided in the MCU, but the CPU, RAM, and ROM in each processing of the above means constituting the slave station input unit 40 The relationship between the above will be omitted from the illustration for convenience of explanation.

The transmission / reception means 41 receives the transmission signal transmitted to the transmission line via the slave station line receiver 51, and delivers the transmission signal to the management control data extraction means 42, the address extraction means 43, and the management monitoring data transmission means 45.

The management control data extraction means 42 transmits the management control signal data (management control data) for the address corresponding to the own station address stored in the profile data storage means 44 in the management control area, and the pulse signal constituting the transmission signal. Extract from the management data area of. The extracted management control data is passed to a processing means for executing processing based on the data.

In this embodiment, when the primary temporary address or the secondary temporary address stored in the profile data storage means 44 is specified in the management control data area at the time of address setting processing at the time of system startup, the management data area The control instruction data extracted from the above is delivered to the management control instruction determination means 48. Further, when the setting data is added to the control instruction data, the setting data is extracted and handed over to the profile data storage means 44. In the normal state after the address setting is completed, when the management control address in which the identifier of the own station type is added to the own station address (positive address) is specified in the management control data area, it is shown according to the purpose of management control. Management control data is passed to the processing means that does not.

The address extraction means 43 counts the pulse signals constituting the transmission signal starting from the timing at which the start signal ST indicating the start of the transmission clock signal ends (falling in this embodiment). The timing at which this count value matches the own station address (positive address) data set by the profile data storage means 44 is the timing at which the data area assigned to the own station of the transmission signal starts (hereinafter, "own station"). Area start timing ”).

The address extraction means 43 that has obtained the own station area start timing enables the monitoring data transmission means 45 during the period of the own station area.

The management monitoring data transmission means 45 counts the pulse signals constituting the transmission signal starting from the timing at which the start signal ST ends (falling down in this embodiment), and obtains the timing of the management data area. Then, when the data to be output as the management monitoring data is delivered, it is output to the transmission line as the management monitoring signal via the slave station line driver 52.

In this embodiment, in the primary temporary address confirmation process described later, the comparison determination data and its element number are delivered from the address setting processing means 49. Further, in the profile data transmission process described later, the profile data of the own station is delivered from the profile data storage means 44. In the normal state after the address setting is completed, data according to the purpose of management control is delivered from a processing means (not shown).

The input means 46 delivers the data based on the input from the input unit 7 to the monitoring data transmitting means 47.

The monitoring data transmitting means 47 outputs the data delivered from the input means 46 as a monitoring signal to the transmission line via the slave station line driver 52 when it is enabled by the address extracting means 43. The monitoring signal is superimposed on the monitoring data area of the transmission procedure.

The management control instruction determination unit 48 sends an instruction signal for executing the primary temporary address generation process and the primary temporary address confirmation process based on the control instruction data delivered from the management control data extraction unit 42 to the address setting processing means 49. Output to. Further, an instruction signal for executing the secondary temporary address determination process, the profile data transmission process, and the positive address determination process is output to the profile data storage means 44.

<Primary temporary address generation process>
As shown in FIG. 4, the address setting processing means 49 is composed of an address generation means 53, a comparison judgment data generation means 54, and a random number generation means 55. Then, when the management control instruction determination means 48 selects the execution of the primary temporary address generation process, the instruction signal is output to the address generation means 53. In the address generation means 53, one of a predetermined number of numerical values is selected as the primary temporary address based on the random numbers passed from the random number generation means 55. The selected primary temporary address is handed over to the profile data storage means 44 and stored. The primary temporary address stored in the profile data storage means 44 is delivered to the management control data extraction means 42 in response to a request from the management control data extraction means 42.

<Primary temporary address confirmation process>
When the management control instruction determination means 48 selects the execution of the primary temporary address confirmation process, the instruction signal is output to the comparison determination data generation means 54. In the comparison judgment data generating means 54, one of a predetermined number of numerical values is selected as a primal number based on the random numbers passed from the random number generating means 55. Further, the comparison / judgment data generation means 54 generates comparison / collation data in which the elements are converted according to a predetermined rule. Then, the element number and the comparison / collation data are delivered to the management / monitoring data transmission means 45.

<Secondary temporary address confirmation process>
When execution of the secondary temporary address determination process is selected in the management control instruction determination means 48, a signal instructing the storage of the secondary temporary address is output to the profile data storage means 44. In the profile data storage means 44 that receives this, the setting data handed over from the management control data extraction means 42 is stored as a secondary temporary address. The secondary temporary address stored in the profile data storage means 44 is delivered to the management control data extraction means 42 in response to a request from the management control data extraction means 42.

<Profile data output processing>
When execution of the profile data output process is selected in the management control instruction determination means 48, a signal instructing the output of the profile data is output to the profile data storage means 44. Upon receiving this, the profile data storage means 44 delivers the profile data to the management monitoring data transmission means 45.

<Positive address confirmation process>
When the execution of the positive address determination process is selected by the management control instruction determination means 48, a signal instructing the storage of the positive address is output to the profile data storage means 44. In the profile data storage means 44 that receives this, the setting data delivered from the management control data extraction means 42 is stored as a positive address. The positive address is valid by restarting the system or an alternative means after the address setting process is completed. Then, after the positive address is activated, the positive address is delivered to each of the requested means from the profile data storage means 44 in response to the request from the management control data extraction means 42 and the address extraction means 43.

In this embodiment, the random number generation means 55 is always operated, but it may be operated by the instruction signal output from the management control instruction determination means 48. In addition, the random number generation algorithm may be the one that is most suitable for the usage situation.

<Configuration of output slave station>
As shown in FIG. 5, the output slave station 5 includes a transmission / reception means 41, a management control data extraction means 42, an address extraction means 43, a profile data storage means 44, a management monitoring data transmission means 45, and a management control instruction determination means 48. A slave station output unit 50 having an address setting processing means 49, a control data extraction means 56, and an output means 57 is provided.

Like the input slave station 4, the output slave station 5 also includes an MCU which is a microcomputer control unit as an internal circuit, and this MCU functions as a slave station output unit 50. As with the MCU of the input slave station 4, the operations and storage required for the processing of the output slave station 5 are executed using the CPU, RAM, and ROM included in the MCU.

Calculations and storage required for processing are executed using the CPU, RAM, and ROM provided in this MCU, and the CPU, RAM, and ROM in each processing of the above-mentioned means constituting the slave station output unit 50. The relationship between the above will be omitted from the illustration for convenience of explanation. Further, in FIG. 5, substantially the same parts as the input slave station 4 are designated by the same reference numerals, and the description thereof will be simplified or omitted.

The address extraction means 43 of the output slave station 5 passes the timing signal for extracting the control data to the control data extraction means 56 during the period of the own station area.

The control data extraction means 56 is transmitted from the timing signal delivered from the address extraction means 43 and the transmission signal handed over from the transmission reception means 41 to the own station address (positive address) stored in the profile data storage means 44. The control data value is extracted and passed to the output means 57.

The output means 57 outputs information based on the control data delivered from the address extraction means 43 to the output unit 8, and operates or stops the output unit 8.

<I / O slave station configuration>
Both the input unit 7 and the output unit 8 that are in a corresponding relationship are connected to the input / output slave station 6. Like the input slave station 4 and the output slave station 5, the input / output slave station 6 also has an MCU which is a microcomputer control unit as an internal circuit, and this MCU functions as a slave station input / output unit. ing. Then, as with the MCU of the input slave station 4 and the MCU of the output slave station 5, the calculations and storage required for the processing of the input / output slave station 6 are executed using the CPU, RAM, and ROM provided in the MCU. It has become a thing.

The operations and storage required for the processing are executed using the CPU, RAM, and ROM provided in the MCU, but the CPU, RAM, and ROM in each processing of the above-mentioned means constituting the slave station input / output unit are used. The relationship between the above will be omitted from the illustration for convenience of explanation. Further, the slave station input / output unit includes both the slave station input unit 40 and the slave station output unit 50, and each of these configurations is substantially the same as the slave station input unit 40 and the slave station output unit 50. Since they are the same, the illustration and description thereof will be omitted.

Next, the address setting method of the slave stations 4, 5 and 6 will be described with reference to FIG.
First, the master station 2 instructs all the slave stations 4, 5, and 6 to set the primary temporary address by a broadcast command. In the slave stations 4, 5 and 6 that receive this, the above-mentioned primary temporary address generation process is executed, and one selected from a predetermined number of numerical values based on a random number is set as the primary temporary address. (Step 1 in FIG. 8)

Next, the master station 2 sequentially designates all of a predetermined number of numerical values that can be set as the primary temporary address by using the management control data area. (Step 2 in FIG. 8) In the slave stations 4, 5 and 6 that receive this, if the primary temporary address set in the own station matches the numerical value specified in the master station 2, the primary temporary address described above Confirmation processing is executed. Then, the element number and the comparison / collation data are output to the management / monitoring data area. (Step 3 in FIG. 8)

In the master station 2 that has received the element number and the comparison collation data, the comparison determination unit 27 converts the element number in the same manner as the slave stations 4, 5 and 6 to generate the comparison collation data, and the slave stations 4, 5 and 6 Compare and collate with the comparison and collation data received from 6. Then, when both data match, data indicating that there is no duplication is passed from the comparison determination unit 27 to the management data unit 22. (Step 3 in FIG. 8)

If there is duplication, different elements and different comparison collation data are transmitted from multiple slave stations 4, 5 and 6, and the element number received by the master station 2 and the comparison collation data are superposed. Become. Therefore, a predetermined rule is not established for the element number received by the master station 2 and the comparison collation data, and the comparison collation data generated by the comparison determination unit 27 of the master station 2 is the slave stations 4, 5, and 6. It does not match the comparison data received from. That is, if both data do not match, it means that they are duplicated. Therefore, when the two data do not match, the data indicating that there is duplication is passed from the comparison determination unit 27 to the management data unit 22. (Step 3 in FIG. 8)

If a numerical value that is not set as the primary temporary address is specified in any of the slave stations 4, 5 and 6, the original number is not transmitted from any of the slave stations 4, 5 and 6. Therefore, in this embodiment, when the element number received by the master station 2 is 0, it is determined that the slave stations 4, 5 and 6 whose numerical values are set as temporary temporary addresses do not exist, and the comparison and collation is not executed. It is supposed to be.

However, there is no limitation on the method for determining the presence / absence of the slave stations 4, 5 and 6 set as the primary temporary address, and other methods may be adopted depending on the usage situation. For example, before requesting the element number and the data for comparison and collation, a simple response is requested, and if there is no response, it is determined that the slave stations 4, 5, and 6 in which the primary temporary address is set do not exist. May be good.

If there is no duplication, the management data unit 22 of the master station 2 has an eigenvalue indicating that the primary temporary address has been set for the first time, for example, a numerical value 1 (001 for 3-bit analog display). Is added to the secondary temporary address table as a fixed secondary temporary address. (Step 4 in FIG. 8)

When the determination of the presence or absence of duplication is completed for all the predetermined number of numerical values that can be set as the primary temporary address, the secondary temporary address added to the secondary temporary address table is transmitted to the unique primary temporary address. Upon receiving this, the slave stations 4, 5 and 6 execute the above-mentioned temporary address determination process when the primary temporary address set in the own station matches the numerical value specified in the master station 2. (Step 4 in FIG. 8)

In addition, the duplicate primary temporary address is instructed to reset the primary temporary address. In response to this, when the primary temporary address set in the own station matches the numerical value specified in the master station 2, the slave stations 4, 5 and 6 execute the above-mentioned primary temporary address generation process and generate random numbers. One selected from a predetermined number of numerical values based on is reset as a primary temporary address. (Step 5 in FIG. 8)

If the primary temporary address is reset in the slave stations 4, 5 and 6 that have duplicates in the previously set primary temporary address, the reset primary temporary address will be checked for duplication by the same procedure as above. It is judged. Then, the secondary temporary addresses are fixed for the slave stations 4, 5 and 6 in which the primary temporary addresses without duplication are set, and the slave stations 4, 5 and 6 in which the primary temporary addresses with duplication are set are determined. Furthermore, the primary temporary address is reset, and the presence or absence of duplication is determined.

The eigenvalues used to determine the secondary temporary address are different from the eigenvalues used to determine the secondary temporary address. For example, the numerical value 2 (010 of 3-bit analog display) is adopted when the confirmation is made by the second primary temporary address setting, and the numerical value 3 (011 of the 3-bit analog display) is adopted when the confirmation is made based on the third random number generation. ..

The processes of primary temporary address setting, determination of presence / absence of duplicate address, and determination of secondary temporary address are repeated until no duplicate primary temporary address setting is confirmed. Then, when it is determined that the primary temporary addresses that have been set in duplicate have disappeared, the secondary temporary addresses are set for all the slave stations 4, 5 and 6 by confirming the secondary temporary addresses at that time. It will be in a state of being. (Step 6 in FIG. 8)

When the secondary temporary addresses are set for all the slave stations 4, 5 and 6, the master station 2 sequentially specifies all the secondary temporary addresses and all the slave stations 4, 5 and 6 respectively. Collect profile data for. Then, a secondary temporary address table that summarizes the profile data in association with the secondary temporary address is completed (step 7 in FIG. 8).

When the secondary temporary address table is completed, the number of occupied points (occupied) for all slave stations 4, 5 and 6 based on the slave station information table and the secondary temporary address table stored in the management data unit 22 of the master station 2 A positive address that reflects the address) is assigned. (Step 8 in FIG. 8)

The positive addresses assigned to all the slave stations 4, 5 and 6 are set from the master station 2 to all the slave stations 4, 5 and 6 via transmission using the secondary temporary address. In this embodiment, the management control data area is used, the secondary temporary address is sequentially specified, and the positive address associated with the designated secondary temporary address is transmitted. Upon receiving this, the slave stations 4, 5 and 6 execute the above-mentioned positive address determination process when the secondary temporary address set in the own station matches the numerical value specified in the master station 2. Then, positive addresses are set in the slave stations 4, 5 and 6. (Step 9 in FIG. 8)

The positive addresses set in all the slave stations 4, 5 and 6 are activated by the positive address activation process. (Step 10 of FIG. 8) In this embodiment, the positive address is enabled by restarting the system after the address setting process (steps 1 to 9 of FIG. 8) is completed. However, there is no limitation on the activation means, and it can be appropriately decided according to the usage situation and the design situation. For example, a broadcast command may be transmitted from the master station 2 to all the slave stations 4, 5, and 6.

In this embodiment, the allocation of the positive address is executed by the management data unit 22 of the master station 2, but there is no limitation on the procedure for allocating the positive address. For example, if the slave station information table does not exist, the positive address may be assigned based on the secondary temporary address table while considering the system design.

Further, the primary temporary address may be set by adopting another method that is not based on a random number, as long as one of a predetermined number of numerical values is set.

1 Control unit 2 Master station 4 Input slave station 5 Output slave station 6 Input / output slave station 7 Input unit 8 Output unit 9 Input / output unit 11 Management judgment means 12 Input / output unit 21 Output data unit 22 Management data unit 23 Timing generation unit 24 Master station output unit 25 Master station input unit 26 Input data unit 27 Comparison judgment unit 29 Storage means 31 Oscillation circuit (OSC)
32 Timing generation means 33 Control data generation means 34 Line driver 35 Monitoring signal detection means 36 Monitoring data extraction means 40 Slave station input unit 41 Transmission / reception means 42 Management control data extraction means 43 Address extraction means 44 Profile data storage means 45 Management monitoring data Transmission means 46 Input means 47 Monitoring data transmission means 48 Management control instruction judgment means 49 Address setting processing means 50 Slave station output unit 51 Slave station line receiver 52 Slave station line driver 53 Address generation means 54 Comparison judgment data generation means 55 Random generation means 56 Control data extraction means 57 Output means

Claims (2)

It is equipped with a plurality of slave stations that send and receive data by a transmission synchronization method via a transmission line common to the control side device, and transmission control data for the slave station and transmission monitoring superimposed by the slave station are included in the transmission procedure. In a control / monitoring signal transmission system provided with a management data area different from the control / monitoring data area composed of data.
One of the predetermined number of numerical values is set as the primary temporary address for each slave station, and the primary temporary address is set.
An inquiry step in which all numerical values that may be set as the primary temporary address are sequentially specified from the control side device via the management data area, and an inquiry to the slave station is executed.
A duplication determination step in which the presence or absence of duplication of the primary temporary address is determined based on a reply to the inquiry from the slave station via the management data area where the specified numerical value matches the primary temporary address.
The primary temporary address determined to be unique from the control side device is sequentially designated via the management data area, and a predetermined eigenvalue is added to the primary temporary address designated via the management data area. The secondary temporary address is transmitted through the management data area together with the designated primary temporary address, and the slave station whose specified primary temporary address matches the primary temporary address set by the own station. In the secondary temporary address setting step in which the secondary temporary address transmitted together with the designated primary temporary address is set,
From the control side device , the primary temporary address determined to have duplication is sequentially designated via the management data area, and the primary temporary address setting command is sequentially designated via the management data area together with the designated primary temporary address. In the slave station where the specified primary temporary address matches the primary temporary address set by the own station, one of a predetermined number of numerical values is set as the primary temporary address. Has a setting process
The inquiry step, the duplication determination step, the secondary temporary address setting step, and the primary temporary address resetting step are repeated until there is no duplication of the primary temporary address.
An address setting method characterized in that the eigenvalues constituting the secondary temporary address are set to different values each time the primary temporary address is reset.
The secondary temporary address is sequentially designated via the management data area, and the slave station in which the designated secondary temporary address and the secondary temporary address set in the own station match, via the management data area. Based on the returned profile data, the data area in the control / monitoring data area to be assigned to each of the slave stations is determined, and in the control / monitoring data area of the data area assigned to each of the slave stations. The address setting method according to claim 1, wherein a positive address indicating a start position is set in each of the slave stations using the secondary temporary address via the management data area.

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