JPH10290239A - Data transfer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a master station to collect monitor control information of normal slave stations quickly even in the case that polling from the master station to a slave station is not normally conducted. SOLUTION: In the data transfer system where a line interconnecting a plurality of slave stations in a chain and a master station connecting to one end of the line are provided and the master station collects monitor information by the selecting polling system, each slave station is provided with a communication processing section 2A, a memory 2C that stores a timer value denoting a polling generating interval instructed by the master station, a monitor value counting the polling interval and item number of polling replies produced between a preceding polling and this polling period, and reply data input terminal the polling reply item number, and the polling reply item number and the reply data are increased/decreased depending on a degree that the monitor value is higher than the timer value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer system of a communication line monitoring and control system, in which a polling (information inquiry) is output from a master station to sequentially call a plurality of slave stations to collect monitoring control information of the slave station. The present invention relates to a data transfer method employing a method.

[0002]

2. Description of the Related Art Hitherto, a data transfer method in this type of communication line monitoring control has been performed by polling for sequentially calling a plurality of slave stations from a master station and collecting monitoring control information of the slave stations.

A line monitoring system in which a master station monitors a line is described in Japanese Patent Application Laid-Open No. Sho 64-10752. This gazette relates to a line monitoring system in which a plurality of slave stations locate a fault point of a line connected in a chain from a master station connected to one end of the line, and perform polling by designating slave stations sequentially from the master station. The present invention relates to a selecting polling method in which a slave station responds immediately and monitors and manages the states of a plurality of slave stations repeatedly and sequentially. This publication includes a line in which a plurality of slave stations are connected inexpensively, and a master station connected to one end of the line. The master station selects the slave stations in order and selects the slave station. A monitoring data request circuit for requesting a response to monitoring data, and a receiver for receiving monitoring data from the slave station;
A determination circuit for locating a line failure point from the monitoring data from the slave station, wherein the master station has an order in which the monitoring data request circuit selects the slave station is closer to the master station. When the monitoring data cannot be collected from one slave station, the above-described determination circuit causes a fault in the line before the slave station without collecting monitoring data for the subsequent slave stations. It is characterized by including a means for determining that the occurrence has occurred.
In this circuit monitoring method, the order of selecting polling for all slave stations on the circuit configuration is set by using the circuit configuration table input in advance so that fault point evaluation can be performed quickly. Thus, there is an effect that the fault point can be located in a short time. Further, even in the case of a line disconnection, it is possible to determine that there is no response of monitoring data from a child station adjacent to the disconnection point for a child station farther from the master station than the next child station after the line disconnection point. Thus, there is an effect that the time for evaluating the fault points can be significantly reduced.

In Japanese Patent Application Laid-Open No. H4-120932, in the polling monitoring control method of the above-mentioned selecting polling method, each slave station is preset as response information to the polling call from the previous polling call. A change information returning means for storing and returning the presence / absence of a state change in the state information; and a line different from the line used for the polling call in response to a request from the master station when the state change information is returned. And information reporting means for reporting the internal status information via a line, wherein two lines, a working line and a standby line, are effectively used, and at least one of the lines is used to previously call polling call response information. Performs polling monitoring to minimize the polling cycle by determining whether there is a status change from time to time, and failure occurs in the slave station Also, it exerts an effect of rapid addressed in the master station are in like.

Further, Japanese Patent Laid-Open Publication No. Hei 3-256422 discloses a supervisory control device for a data transmission system. In the supervisory control device for a data transmission system having a 1: N multipoint configuration, a supervisory control master station has a supervisory control device. Means for polling slave stations, means for storing the number of supervisory control slave stations, and means for receiving polling from the supervisory control master station; The present invention is characterized in that a means for detecting a carrier and a means for analyzing data transmitted by the slave station are provided to the supervisory control master station.
Then, since all of the supervisory control slave stations respond with one polling from the supervisory control master station, there is no need to poll all supervisory control slave stations, and the supervisory control time of a plurality of supervisory control slave stations can be minimized. It has the effect that can be limited to.

Japanese Unexamined Patent Publication No. 3-145848 relates to a line monitoring method for a modem that transmits data via a communication line, which includes a line characteristic measuring circuit for a plurality of schools and has a function of monitoring the state of the line. In a line monitoring system consisting of modems for modems, when transmitting information on whether a failure has been detected by the modem or is normal to the line monitoring management device, the data when the failure was detected and when it was normal In which the length of normal data is reduced as compared to the case where a failure is detected. As a result, when the failure monitoring response is normal and when there is a failure, the configuration was changed to shorten the normal response length. It is possible to collect.

[0007]

However, in this conventional data transfer method, if polling is not performed normally due to a faulty communication line failure of the slave station, the master station performs abnormal processing such as retransmission processing. It takes a long time, and polling of other normal slave stations is delayed, so that the monitoring control information cannot be transferred quickly.

[Object of the Invention] The present invention is intended to collect monitoring control information for a normal slave station quickly even when polling from a master station to a certain slave station is not performed normally. The purpose is to do.

[0009]

In order to achieve the above object, the present invention monitors a polling interval from a master station to a slave station, and collects the entire monitoring information when the interval exceeds a set value. A function to arbitrarily change the number of data items to be returned to the master station at a time so as not to affect data transmission.

[0010] Further, the mobile station is composed of a master station and a plurality of slave stations connected to the master station. The master station sequentially sends polls to the plurality of slave stations. In the data transfer method of analyzing the contents of the polling upon receipt and responding immediately when it is necessary to respond, the slave station monitors the polling interval from the master station with monitoring means, and the interval is monitored. A function to arbitrarily change the number of data items returned by the master station to the master station within a time period in which no trouble occurs in monitoring information collection when the request interval monitor timer value stored in the memory is larger than the request interval monitor timer value. It is characterized by.

[0011] Further, there is provided a line in which a plurality of slave stations are connected in a chain, and a master station connected to one end of the line, wherein the master station collects monitoring information by a selecting polling method. In the above method, the slave station includes a communication processing unit, a timer value for the polling interval specified by the master station, a monitor value for counting the polling interval, and the number of polling responses generated during the current polling period from the previous polling. And a memory for storing response data according to the number of polling responses, and the number of polling responses and the response data are determined according to the degree to which the monitor value is greater than the timer value. It is characterized by increasing or decreasing.

In the data transfer method, the polling format transmitted by the slave station to the master station in response to the polling may include the number of polling responses,
The data length of the response data according to the number of polling responses, the time of occurrence of the polling response, and the response data are arranged in time series. Further, the master station gives an instruction to set a timer value of the polling occurrence interval in advance to the plurality of slave stations.

[Operation] Even if the master station takes a long time to perform a polling process on an abnormal slave station, the polling process on a normal slave station can smoothly increase the number of data to be returned to the master station at a time, so that monitoring and control can be performed smoothly. Information is collected.

[0014]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of the data transfer system of the present invention. In FIG. 1, the data transfer method according to the present embodiment includes a master station 1A that collects monitoring control information of each wireless station and a slave station 1 that collects information of wireless devices.
B-1 to 1B-n.

In this data transfer system, the master station 1A
Polling is sequentially performed on the slave stations 1B-1 to 1B-n, and the polled slave stations 1B-1 to 1B-n return the monitoring control information collected from the wireless device to the master station 1A.

FIG. 2 is a block diagram showing an example of the configuration of a slave station connected to the system of this embodiment shown in FIG. Each slave station includes a communication processing unit 2A, a transmission / reception processing unit 2B, a transmission / reception memory 2C, and a request interval monitoring unit 2D.

In FIG. 2, each slave station receives polling from a master station that collects monitoring information in a transmission / reception processing section 2B, and a polling content for collecting a plurality of data in a communication processing section 2A. Each of them is separated and analyzed and processed, and only in the case of polling of the own station, the contents of the polling are stored in the transmission / reception memory 2C. Communication processing unit 2
A judges the contents of the polling, compares it with the data stored in the request interval monitor unit 2D, processes the monitoring information stored in the transmission / reception memory 2C, and responds to the polling in the transmission / reception processing unit 2B. The modulated data is modulated at a predetermined carrier frequency and returned as a response to the master station. As described above, the communication processing unit 2A has the memory read, write,
Has functions such as timer count, comparison calculation, etc.
U and its peripheral circuits.

FIG. 3 is a diagram showing the contents of the request interval monitor 2D. The request interval monitor unit 2D includes a request interval monitor timer value 3A, a request interval monitor value 3B,
The number of monitoring control information items is 3C.

In FIG. 3, the request interval monitor timer value 3A of the request interval monitor unit 2D is transmitted to the communication processing unit 2 of the slave station in accordance with an instruction from the master station according to the system configuration or the like.
Arbitrarily set via A. That is, the master station transmits the data including the timer value of the output interval of the polling set by the master station in advance by the data transmitted by the polling in advance, and the slave station monitors the data of the timer value in the request interval monitor. DRAM or SRA
M and a memory such as a cache memory. The request interval monitor value 3B stores the time from the previous polling reception to the current reception. Using the clock in the communication processing unit 2A, reset is performed at each previous polling time, the time is counted, and the time until the current polling time is stored in the memory as a request interval monitor value while being sequentially changed. The number of monitoring control information items 3C stores the number of monitoring control information items generated between the previous polling and the current polling. That is, the monitoring control information number 3C stores the number of pieces of monitoring control information generated after replying during the previous polling among the data of various information requested by the master station in the memory. The above request interval monitor unit 2D
The data of the request interval monitoring timer value 3A, the request interval monitor value 3B, and the number of monitoring control information items 3C are appropriately revised and stored according to the instruction of the communication processing unit 2A. Although the above memory has been described as an independent example, it goes without saying that the memory may be stored in a predetermined area of the transmission / reception memory 2C.

Here, the information of the data monitored and polled by the master station, such as the reception power level and power supply voltage of the slave station, the status of the door sensor for intrusion into the station, and the like, in the wireless communication system using the micro wireless line. You can get lots of information. Also, when the slave station is a terminal for CATV, there are a charge amount from the previous polling, a program name watched on TV, a program name watched now and a time watched, and the like. If so, there are household water bills, electricity bills, gas bills, usage status of various electric appliances, and the like. Also, if you are monitoring the phone line,
There are telephone charges, their telephone hours, and the telephone number of the other party. In addition, if there is a system that monitors and manages slave stations using satellite communication, the above-mentioned necessary data and data such as reception error time and data error rate per time in a satellite circuit failure situation are also included. There is.

FIG. 4 is a diagram showing a format of polling data transferred from the slave station in response to a request from the master station. The data section of this format has a data length of 4A, a data count of 4B, time information sections 4C-1 to 4C-n, and supervisory control data sections 4D-1 to 4D-n.

In FIG. 4, the number of data items 4B is the number of monitoring control information items 3 stored in the request interval monitor 2D.
The value of C is written. The length of the data portion determined by the value of the monitoring control information number 3C is written in the data length 4A. In the time information section 4C and the monitoring control data section 4D, the occurrence time data of the number corresponding to the value of the monitoring control information number 3C stored in the transmission / reception memory 2C and the data indicating the information are written.

Next, the operation of this embodiment will be described with reference to FIGS. In the present embodiment, the master station 1A sequentially polls the slave stations 1B-1 to 1B-n, and the polled slave station returns monitoring control information collected from the wireless device to the master station 1A.

For example, the polled slave station 1B-1
When the request interval monitor value 3B stored in the request interval monitor unit 2D becomes larger than the request interval monitor timer value 3A, the monitoring control information number 3C is written in the data number 4B in the returned data part, The monitoring control data for that number is returned at a time. When the request interval monitor value 3B is much larger than the request interval monitor timer value 3A, data of a lower priority number may be transmitted from the monitor control information number 3C. Further, the amount of data transferred to the master station may be increased or decreased according to the difference between the request interval monitor value 3B and the request interval monitor timer value 3A. In this process, the communication processing unit 2A reads the stored value of the request interval monitoring unit 2D, determines the data to be transferred to the master station, and forms polling data. On the other hand, the request interval monitor value 3
When B is smaller than the request interval monitoring timer value 3A, not only the data corresponding to the monitoring control information number 3C but also the current state of the slave station is transferred.

According to the above-described embodiment, if the number of normal polling requests is about one and the polling request interval is larger than a predetermined value, it is assumed that a failure has occurred in any of the slave stations. Since the information corresponding to the number of monitoring control information items 3C accumulated up to that point is returned to the master station all at once or preferentially, a predetermined number is returned to the master station. In this way, the situation of the normal slave station can be picked up and operation monitoring without delay can be continued.

[Second Embodiment] In the conventional data transfer method, the interval between confirmation requests may be extended depending on the state of the communication line and the monitoring station, and it may be difficult to collect monitoring information of a normal monitoring station. .

According to the data transfer method of the present embodiment, the monitoring station, which is the master station, monitors the change of the confirmation request interval, so that the monitoring information is added to the response message to the confirmation request so as not to affect the collection of the monitoring information. The number of monitoring information items that can be returned at one time can be increased by adding the number of items.

FIG. 5 is a block diagram of the polling response unit according to this embodiment. The present embodiment includes a communication processing unit 11, a transmission / reception processing unit 12, a transmission / reception memory 13, and a request interval monitoring unit 14.

Next, the operation of this embodiment will be described. When collecting monitoring information, a confirmation request is issued as polling from the higher-level device 10, received by the communication processing unit 11, processed by the transmission / reception processing unit 12, and stored in the transmission / reception memory 13. The contents of the request are determined, the monitoring information stored in the transmission / reception memory 13 is processed by the transmission / reception processing unit 12, and the communication processing unit 11 returns a response to the host device 10.

When the interval between confirmation requests from the host device 10 is extended, monitoring information is accumulated in the transmission / reception memory 13 without being collected, and monitoring information cannot be collected smoothly. Therefore, the request interval monitoring unit 14 checks the interval of the check request and increases the number of pieces of monitoring information added to one response, so that monitoring information can be collected smoothly.

As described above, the present embodiment monitors the confirmation request interval and increases the number of pieces of monitoring information added to one response, so that the parent information can be obtained regardless of the state of the communication line or the monitoring station. The station has an effect that monitoring information can be collected smoothly.

[0033]

As described above, according to the present invention, the polling request interval is monitored in the slave station, and the number of monitoring control data to be returned is increased in accordance with the interval. It is possible to reduce the influence of the monitoring control information collection time depending on the state.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram according to the present invention.

FIG. 2 is a slave station block diagram according to the present invention.

FIG. 3 is a configuration diagram of recording data of a request interval monitor unit according to the present invention.

FIG. 4 is a configuration diagram of a data format according to the present invention.

FIG. 5 is a slave station block diagram according to the present invention.

[Explanation of symbols]

 1A Master station 1B-1 to 1B-n Slave station 2A Communication processing unit 2B Transmission / reception processing unit 2C Transmission / reception memory 2D Request interval monitor unit 3A Request interval monitor timer value 3B Request interval monitor value 3C Number of monitoring control information 4A Data length 4B Number of data 4C-1 to 4C-n Time information part 4D-1 to 4D-n Monitoring control data part

Claims (4)

[Claims] The system comprises a master station and a plurality of slave stations connected to the master station. The master station sequentially issues polls to the plurality of slave stations, and the plurality of slave stations each perform polling. When receiving, the contents of the polling are analyzed, and if it is necessary to respond, a response is immediately sent back. In the data transfer method, the slave station monitors polling intervals from the master station by monitoring means. A function of arbitrarily changing the number of data items returned by the master station to the master station within a time period in which no trouble occurs in monitoring information collection when the request interval monitor timer value stored in the memory is larger than the request interval monitor timer value A data transfer method. 2. A data transfer comprising a line in which a plurality of slave stations are connected in a chain and a master station connected to one end of the line, wherein the master station collects monitoring information by a selecting polling method. In the method, the slave station includes a communication processing unit, a timer value of a polling interval specified by the master station, a monitor value for counting the polling interval, and the number of polling responses generated during the current polling period from the previous polling. And a memory for storing response data according to the number of polling responses, and the number of polling responses and the response data are determined according to the degree that the monitor value is greater than the timer value. A data transfer method characterized by increasing or decreasing. 3. The data transfer method according to claim 2, wherein the polling format transmitted by the slave station to the master station in response to the polling is based on the number of polling responses and the number of polling responses. A data transfer method, wherein a data length of the response data, an occurrence time of the polling response, and the response data are arranged in time series. 4. The data transfer system according to claim 2, wherein said master station gives an instruction to set a timer value of said polling occurrence interval in advance to said plurality of slave stations. method.