JPH0537986A - Time informing system for monitoring information - Google Patents

Abstract

PURPOSE:To simplify the circuit constitution of a slave station and to shorten the data length of time information to be transmitted by sending the generation time information of a time interval necessary for monitoring from each slave station to a master station together with status information and restoring the sent information by the master station in respect to a system for informing the generation time of the status monitoring information of each slave station to the master station in a remote monitoring device. CONSTITUTION:Each slave station 21 is provided with a counter 22 to be cleared and reset in each counting of clocks generated in each minimum time DELTAt sec necessary for the monitoring of event generation for 24 hours a day and the master station 1 is provided with a reference time transmitting part 11 for sending a reset instruction to the counter 22 of the relevant slave station 21 at reference time t0 every day, a time information restoring part 12 for receiving the transfer of a count value (n) from the slave station 21 at the relevant time of generating an event and restoring the generation time and a buffer 13 for previously storing date data. At the time of receiving the transfer of the count value (n) from each slave station 2 at the time of generating an event in the counter 22, the master station 1 processes the received data based upon the date previously prepared in the buffer 13 and restores the whole information of the date and time of the event generated in the slave station 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring device for remotely monitoring status change occurrence information (monitoring information) of a plurality of slave stations according to a control command from a master station, and more particularly to generating monitoring information of each slave station. The present invention relates to a time notification method of monitoring information for notifying a master station of time. As the configuration of the information processing system of each slave station has become complicated in recent years, it is required for the master station that monitors this to facilitate the fault isolation of each slave station. Therefore, it is necessary to transmit the time information of the event occurrence of each monitored slave station to the master station accurately and quickly.

[0002]

2. Description of the Related Art In a conventional remote monitoring device, in order to reduce the amount of data transmitted from each slave station to the master station, the status monitoring information from each slave station is not added to the master station without the occurrence time information. The first method in which the station receives the information as the time of event occurrence, and the second method of transmitting the year, month, day, hour, minute, and second of the occurrence time for each occurrence event from the slave station in a binary code BCD. There was a method (the date may be omitted).

However, in the first method described above, when notification of the monitoring information of the slave station to the master station conflicts between the slave stations, the master station is in an order different from the actual event occurrence order. It may be transmitted to the side. Also, in the second method,
For all of the slave stations, a time and date update circuit is required, and since each information of year, month, day, hour, minute and second is transmitted as 1 byte each, the data length of the entire transmitted data becomes long. I will end up.

[0004]

Therefore, in the first method, even if the time relationship is to be checked for the events related to each other among the slave stations, the timing of polling from the master station to each slave station, Due to the difference in transmission time between the master station and each slave station, the master station may not be able to obtain information according to the order of occurrence, and there is a problem that the slave stations cannot be monitored accurately.
Further, the second method can ensure the accuracy of the monitoring information of each slave station, but the configuration of each slave station becomes complicated, and the data length on the transmission line becomes longer by the time information, so that the monitoring information of each slave station becomes longer. There was the problem of hindering quick communication.

An object of the present invention is to add information on the occurrence time of the state change at the minimum constant interval necessary for ensuring the accuracy of the monitoring information of each slave station to the information of the status monitoring at each slave station. It is a method of recovering at the sending master station, and is to realize a time notification method of monitoring information in which the configuration of each slave station is simple and the data length of the time information to be transmitted is short.

[0006]

The basic configuration of the present invention for achieving this object is shown in the principle diagram of FIG. 1, and its basic operation will be described with reference to the explanatory diagram of FIG. The counter 22 is cleared resets the count value for each counting by a minimum predetermined time Delta] t 24 hours the clock every example daily seconds of units required for event monitoring each slave station 2 ₁ is provided from the parent station 1 reference time transmitting section 11 and the child station for sending reset instructions count value to the child station 2 _first counter 22 for each day of the reference time t ₀
And a buffer 13 for storing date data in advance instructions sent with the time information restoration unit 12 from 2 ₁ of counter 22 to restore the emitting production time receiving a transfer of the count value n at the time an event occurs is provided, the main station 1 counter but each slave station 2 ₁ issues an instruction to each slave station 2 ₁
Receives the count value n at the time of event occurrence from 22 and processes it with the date prepared in the buffer 13 in advance to restore all time information of the event occurrence date and time of each slave station 2. To configure.

[0007]

In the present invention, as shown in FIG. 2, the slave station 21 in FIG. ₁ starts its counter 22 with a command sent from the master station ₁ at a constant reference time t ₀ every day, and at a time interval Δt seconds. Count value at the time of event occurrence from counter 22
Using n, the master station 1 is notified as time information in Δt seconds units when the change in the monitoring target occurs. The master station 1 interprets this as the time starting from the reference time t ₀ on the D day of the day and having elapsed time Δt · n seconds, and the time information restoration unit 12 interprets this.
The date data from the buffer 13 is used to convert the date to the date and time. Therefore, in each slave station 2 _1, only counts up the count value of the counter 22 per time Δt seconds, not only is not necessary to perform processing of complex time update, time of monitoring information to be passed to the transmission line Since the information is not the year, month, day, hour, minute, and second information but only the minimum unit time Δt seconds required for status monitoring, the counter value n, it is possible to significantly reduce the amount of data to be transmitted. It is possible to quickly transmit the monitoring information to the master station 1.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a block diagram showing a configuration of a time information notification system for monitoring information according to an embodiment of the present invention, and FIG. 4 is a diagram showing a processing flow of time restoration in a master station of this embodiment. In this embodiment of FIG. 3, the master station 1 for processing the monitoring information from each slave station 2 ₁ Screen and form stamping, etc., and notifies the master station detects the state change of the monitored item at the sensor Multiple slave stations 2 ₁
~ 2 _n , both of which are connected by transmission line 3. The information on the status change of the monitoring items detected by the slave station 2 ₁ is
A clock is generated every 24 seconds and is calculated by the counter adder 23.
The count value n counted in 22 is added to the monitoring information of the sensor input unit 27 as time information of the state change, and the master station 1 is notified. The master station 1 that receives this count value n
Is analyzed and converted into time information, the monitoring information is stored in the database 17, displayed on the screen, and the form is sequentially printed out by the printer. The count value of the sub-stations 2 ₁ of counter 22, the daily instruction of a fixed reference time t ₀ from the master station 1,
For example, it is cleared every 0:00:00, and the time t ₀ is used as a reference to count up every Δt = 0.1 seconds.
First, the flow of monitoring information of each slave station will be described. Each slave station 2 ₁
The information of the status change of each monitoring item detected by the sensor input section 27 of is edited in the message for the master station 1 by the information editing section 26.At this time, the time of the change is Δt = 0.1 seconds unit. The count value of 1-byte data representing one day is read from the counter 22 and added. The counter adder 23 sends a clock of the minimum unit time Δt = 0.1 seconds calculated to the counter 22 based on the input signal from the oscillation circuit 24. The counter 22 counts up the clock at the minimum unit time Δt = 0.1 seconds calculated by the count adder 23, and is reset and reset every day, for example, every 24 hours, as described above. The electronic message edited with the time of occurrence of this state change is transmitted by the communication processing unit 25 to the communication processing unit 15 of the master station 1 via the transmission path 3. Upon receiving this, the communication processing unit 15 of the master station 1 passes the received telegram to the time information restoration unit 12 as a pre-process for data processing by the information processing unit 16. The time information restoration unit 12 reads the information in the buffer 13 or 14 that stores the reference time, and uses the 6-byte buffer for the year, month, day, hour, minute, and second before conversion.
The data stored in T1, T2, T3, T4, T5, T6 is added to the slave station 2
Add the count value of the 1-byte buffer T7 in the unit of Δt = 100ms from, and convert the date, hour, minute, second, and time of 0.1 seconds after conversion to 7-byte information T in total. Hand over to. That is, in the information processing unit 16 of the master station 1, the count value C stored in the count value storage buffer C for 3 bytes before conversion is first set to the numerical value 10 in step 1 as in the time restoration processing flow of FIG. The remainder of (C ÷ 10) divided by is stored in the buffer T7 for 100ms data. In the next Step 2, (C-T7)
Store the quotient of ÷ 10 in the work buffer W1 as the number of seconds count value, and in Step 3, use the quotient of (W1 ÷ 3600) as the hour count value.
Store it in T4 and store the remainder in W1. In the next Step 4, (W
The quotient of 1/60) is stored in T5 as the minute count value, and the remainder is stored in W1. Then, in Step 5, W1 is stored in T6 as the second count value. Then, in Step 6, the date data in the reference time storage buffer 1 is added to the time data in T4 to T6 and stored in the work buffer W2. Then, in Step 7, it is checked whether the time of the addition result is larger than the current time, and No
If so, immediately store the contents of W2 in the converted date / time storage buffer T in Step 9, and if YES in Step 7,
In step 8, the date and time of the reference time storage buffer 2 is added to T and stored in the work buffer W2, and in step 9, it is stored in the converted date and time storage buffer T. Then, the information processing unit 16 of the master station 1 stores the data in the database 17, displays the screen, outputs the form, and the like.

Next, the reset operation of the counter for each reference time will be described. The master station 1 has a reference time transmission unit 11 from which a pulse is periodically processed at a constant reference time t ₀ every day (in this embodiment, every 24 hours, every hour at 00:00:00). through section 15, to the slave station 2 _first counter 22 is transmitted as a reset signal. At this time _, the date and time of the previous transmission is copied and transferred from the reference time storage buffer 1 to the buffer 2, and the date and time of this transmission is stored in the same buffer 1. The date and time in buffer 2 are used when processing the monitoring information of the slave station which is counted based on the reference time of the previous day immediately after the change of the reference time. Each slave station 2 ₁ receives a reset command from the master station 1 to the counter to the communication processing unit 25, which passes to the counter clear portion 21, the counter clear portion 21 the count value to reset the counter 22 0 And

[0010]

As described above, according to the present invention, the year / month / day / hour / minute / second information of the detailed generation time information of the monitoring information of each slave station is set in units of the minimum unit time required for status monitoring. Since it is possible to transmit only the time information of short data length, the efficiency of the transmission line of the remote monitoring device is improved and the master station can obtain a lot of monitoring information from each slave station. can get.

[Brief description of drawings]

FIG. 1 is a principle diagram showing a basic configuration of a time information notification system for monitoring information according to the present invention.

FIG. 2 is an explanatory diagram of a basic operation of the time information notification system for monitoring information according to the present invention;

FIG. 3 is a block diagram of a time information notification system for monitoring information according to the embodiment of this invention;

FIG. 4 is a flowchart of time restoration processing in the master station according to the embodiment of this invention.

[Explanation of symbols]

1 master station 2 ₁ is the slave station, 3 transmission lines, 11 reference time transmitting section, 12 the time information restoration unit, 13 and 14 buffer, 15 communication processing unit, 16 information processing unit, 17 Is a database, 21 is a counter clearing unit, 22 is a counter, 23 is a counter adding unit, 24
Is an oscillation circuit, 25 is a communication processing unit, 26 is an information editing unit, and 27 is a sensor input unit.

Claims (1)

Claims: 1. A master station in the remote monitoring device each slave station command from (1) (2 ₁₎ the master station the occurrence time of the status information monitoring (1)
A counter that resets and resets the count value every time the slave station (2 ₁ ) counts the clock at a fixed time (Δt seconds) required for monitoring the occurrence of events for each slave station (21). 22) and the base time (t ₀ ) on the base station (1) every day.
The reference time transmission unit (11) that sends a reset command for the counter (22) of the slave station and the count value (n) at the time of event occurrence are transferred from the counter (22) of the slave station A time information restoration unit (12) for restoration and a buffer (13) for writing and storing date data in advance are provided, and the master station (1) has each slave station (2 ₁ )
Receives the count value (n) at the time of event occurrence from the counter (22) and processes it with the date and time data prepared in advance in the buffer (13) to restore all the information of the event occurrence date and time of each slave station A method for notifying the time of monitoring information, which is characterized in that