JPH09181721A - Polling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten time for collecting monitor information when there are many station giving no response by successively polling stations one by one, sending a response instruction later and repeating a procedure for letting the station respond to this instruction. SOLUTION: When the transmission of polling command to each station to be monitored is detected at a command transmission part for synchronization provided at a communication processing part, a command for synchronization is generated and sent out while adding a transmission destination address decided corresponding to the transmission destination address of this polling command so that the response from each station to be monitored can be instructed. For example, P(x) shows polling to a station X, PS(x) shows the responding instruction of polling to the station X, and A(x) shows the response of station X. The responding instruction is sent out after successively performing polling from a station 1 to stations 2-n one by one and by repeating the procedure for letting the station X respond to this instruction, the information of respective stations is collected. Thus, the time for collecting the monitor information can be shortened even for a system having many stations to be monitored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring and controlling system, and more particularly to a polling and selecting system remote monitoring and controlling system for collecting information of a large number of stations by polling.

In the polling / selecting method, one station (monitoring station) sequentially calls a number of stations (monitored stations) in accordance with a predetermined sequence to collect information on each station.

In such a case, even in a system having a large transmission delay and a large number of monitoring stations or a system having a low transmission quality such as a wireless line and a line disconnection is likely to occur, it is required that the information collection time is as short as possible. Has been done.

[0004]

2. Description of the Related Art FIG. 66 shows a configuration of a remote monitoring control system, in which a station 1 as a monitoring station and stations 2, 2, 3, ... As monitored stations are connected via a transmission line. Shown to be connected. In the monitoring control device 11, the station 1, which is a monitoring station, remotely monitors a monitored station at a remote place by polling via the communication processing unit 12, and monitors the monitoring device 15 such as a communication device installed in the monitored station. The operating status is monitored and displayed on the monitoring information display unit 13 in real time, and the maintenance and inspection of the monitoring device 15 is quickly performed. At this time, the central processing unit 14 processes the operation control of the communication processing unit 12 and the monitoring information display unit 13.

Further, the monitored control device 16 in the station 2 which is the monitored station receives polling from the monitoring control device 11 of the monitoring station via the communication processing unit 17, and monitors the inside of the station via the monitoring input unit 18. The operating states of the station power supply equipment of the equipment (communication equipment) 15, wireless equipment, transmission equipment, and other communication equipment are collected and transmitted to the supervisory control equipment of the supervisory station via the communication processing unit 17. The same applies to the other monitored stations, such as stations 3.

FIG. 67 shows the configuration of a conventional communication processing unit, which includes a communication processing LSI 22 for processing communication with a transmission path and a CPU 21 for controlling the operation of the communication processing LSI 22. Have

FIG. 68 shows a processing flow (1) of the conventional communication processing unit, and explains the operation at the time of polling of the supervisory control device in the supervisory station shown in FIG. Further, FIG. 69 shows a processing flow (2) of the conventional communication processing unit, and explains the operation at the time of response of the monitored control device in the monitored station shown in FIG. 67.

FIG. 70 shows a conventional and polling / selecting system system configuration to which the present invention is applied. A plurality of stations 1 (monitoring stations) are connected to the same transmission line. Shows the case where the monitored stations (stations 2 to n) are remotely monitored and controlled by polling.

FIG. 71 is a diagram for explaining the normal operation in the conventional system, where (a) shows a polling sequence and (b) shows a time chart. In the figure, P (X) indicates polling for the station X, and A (A)
(X) shows the response of station X. As shown in the figure, information is collected by sequentially polling station 1 to station 2 to station n and receiving a response.

The time chart shown in (b) shows the case of observation at station 1. In the figure, the T line is the transmission line of the station 1,
The R line indicates the receiving line of the station 1, and it is shown that the station 1 sends the polling on the T line and receives the response to the polling via the R line in order to the stations 2 to n. There is.

FIG. 72 illustrates the operation of the conventional system when the monitored station has a large amount of information.
Shows a polling sequence, and (b) shows a time chart. As shown in (b), since the amount of information of the station 3 is large, the time of the response A (3) is extended, but the polling sequence does not change and other communication states do not change.

FIG. 73 is a diagram for explaining the operation when the monitored station in the conventional system fails, where (a) shows a polling sequence and (b) shows a time chart. As shown in (a), the response A (3) does not arrive because the station 3 has failed. Therefore, as shown in (b), the station 1 waits for a predetermined waiting time Wt and then polls the next station 4. Send P (4). The response time Wt in this case is the response A of the station with the largest transmission delay.
It is necessary to set so that (n) is not ignored.

FIG. 74 is a diagram for explaining the operation in the case of a transmission line disconnection in the conventional system, where (a) shows a polling sequence and (b) shows a time chart. As shown in (a), since the transmission line is disconnected at the point A on the station 1 side, the response of each monitored station does not reach,
As shown in (b), the station 1 waits for a predetermined waiting time Wt for each monitored station, and then sends polling to the next monitored station. Response time Wt in this case
Must be set so that the response A (n) of the station with the largest transmission delay is not ignored.

FIG. 75 is a diagram for explaining the operation in the case where the response processing of the monitored station is delayed in the conventional system.
(A) shows a polling sequence and (b) shows a time chart. It is shown that the response processing of the station 2 and the station 4 is delayed with respect to the polling from the station 1, so that the respective waiting times Wt are generated as shown in (b).

[0015]

The information gathering time in the conventional polling method will be analyzed below. FIG. 76 shows
The information collection time at the time of normal in the conventional method will be described. In the figure, Ptx is the packet time of polling to the station X, Atx is the packet time of the answer from the station X, and Dt.
x is the delay time to the station X, and Btx is the processing time of the station 1. The information collection time T for all stations in the case of FIG. 76 is as follows. T = (Pt2 + Pt3 + ... + Ptn) + (At2 + At
3 + ... + Atn) + (Dt2 + Dt3 + ... + Dtn) +
Bt1 × n

FIG. 77 illustrates the information collection time when the monitored station has a large amount of information in the conventional system.
Since the station 3 has a large amount of information, as shown in the figure, the answer packet time At3 is extended, and therefore the overall information collection time T is also extended.

FIG. 78 illustrates the information gathering time when the monitored station fails in the conventional method.
t indicates an answer (response) waiting time. Since the station 3 has failed, the total information collection time T is
The waiting time Wt for the station 3 becomes longer, and the processing time Bt1 of the station 1 for the station 3 becomes shorter.

FIG. 79 illustrates the information collection time in the case of a transmission line disconnection in the conventional method. Since the transmission line is disconnected, the total information collection time T is the sum of the polling packet time Ptx for all stations and the waiting time Wt.

FIG. 80 is a diagram for explaining the information gathering time in the case where the response processing delay of the monitored station in the conventional system, where Wtx is the response processing delay time of the station X. Since the response processing of the stations 2 and 4 is delayed with respect to the polling, the overall information collection time T is longer than the normal case because the waiting times Wt2 and Wt based on the response processing delay for the stations 2 and 4 are longer.
It becomes longer by t4.

An example of calculating the information collection time in the conventional method will be described below. The conditions necessary for the calculation in this case are as follows.

FIG. 81 shows a concrete example of a conventional transmission format and a command. (A) shows the transmission format. The commands in the figure are a polling command and a response command. There is.

(B) shows a concrete example of the conventional polling command. Command 01 means a polling packet. The source address 01 indicates that the source is station 1. The destination address 02 is
It indicates that the call destination is station 2. The destination address changes from 2 to 30 when there are 30 stations to poll. The data length 0000 means that there is no data. That is, since it is a polling packet, there is no data.

(C) shows a concrete example of a conventional response command. The command 02 means a response packet. The source address 02 indicates that the source is station 2. The source address changes from 2 to 30 when there are 30 responding stations. Destination address 01
Indicates that the destination is station 1. Data length 0
256 means that the data amount is 256 octets. The data in this case is monitoring information.

The information gathering time for all stations in the normal case shown in FIG. 76 is as follows. Now, assuming that the transmission rate is 9600 bps and the number of monitored stations is 50, when the time required for each element is calculated, the polling occupied time (polling packet time) Ptx is as shown in FIG.
In the format of (b), the amount of information is 5 oct (octet), and Ptx = (1/9600 bps) × 5 oct × 8 bit = 4.
2 ms

The occupied time Atx of the response is in the format of FIG. 81 (c), and if the information amount is 16 oct, the information amount of the response frame is 21 oct, so Atx = (1/9600 bps) × 21 oct × 8 bit = 1
7.5ms

The delay time Σ ₁ ⁵⁰ Dtn of the transmission line is Σ ₁ ⁵⁰ Dtn = 15 ms × 1 + 15 ms × 2 + 15 ms × 3 + ... + 15 ms × 50 = 19,125 ms when the transmission delay in one section is 15 ms.

[0027] Therefore, the information collection time T of all the ^{_{stations, T = Σ 1 50 Dtn +}} (Ptx + Atx) × 50 = 20,210ms ... (1)

Further, the information gathering time for all the stations shown in FIG.
Is the delay amount of the farthest station, so Wt = 15ms × 50 section + Atx = 767.5ms

Therefore, the information collection time T of all stations is T = (Ptx + Wt) × 50 stations = 38,585 ms (2)

From the equations (1) and (2), the information collection time difference between the all-station unmonitorable state and the normal state is 19.460 ms.

As described above, in the conventional polling system,
When all stations cannot be monitored due to transmission line disconnection, etc., it takes a longer time than normal to finish collecting information and confirm that all stations are in unmonitorable state. was there.

In the remote monitoring and control system, since it is necessary to monitor the status of each monitored station in real time,
Thus, it takes a long time to collect information, which may be a fatal defect.

On the other hand, Japanese Patent Laid-Open No. 2-177744 discloses that such a problem can be solved.
In the satellite telemetry system in which the monitoring station sequentially polls multiple monitored stations to collect data, the monitoring station sends a polling signal to the monitored station without waiting for the completion of data collection from the monitored station. A scheme has been proposed.

FIG. 82 shows the polling sequence (1) in the known example, and shows that a problem occurs in each of the following cases. When there are multiple response packets for a command When the number of response packets changes depending on the type of command When the response packet length for a command differs depending on the station When the response packet length changes depending on the type of command

FIG. 83 shows the polling sequence (2) in the known example, and shows that a problem occurs in each of the following cases. When the response time increases depending on the type of command When the response time differs depending on the processing contents of the monitored station

FIG. 84 shows a polling sequence (3) in a known example. In the case of a multi-drop type bus format line, all commands from the monitoring station and responses from the monitored station are sent to other stations. Since it is transmitted, it has been shown to cause the following problems. Polls and replies collide on the wire.

As described above, in the above-mentioned known example, the processing time of the monitored station is fixed when the number of packets for the command is one and the length is fixed, or when the number of packets for the command is plural but the length is fixed. In addition, only polling is used in a limited system condition such that the response of the other station cannot be intercepted by the other station by multi-drop.

Further, the above-mentioned known example does not describe the circuit configuration, the transmission data format, and the hardware sequence,
Only the software-like sequence discloses the idea.

The present invention is intended to solve such a problem of the prior art, and in a polling / selecting type remote monitoring control system for collecting information of a large number of stations by polling, transmission delay of a line. In a system with a large number of monitored stations, the collection time of monitoring information can be shortened compared to the conventional method, especially when the number of unresponsive stations is large, the collection time of monitoring information can be shortened. It is intended to provide a polling method capable of doing so.

[0040]

In the present invention, as shown in FIG.
6, in the system configuration shown in FIG.
The conventional polling / selecting method described with reference to FIG. 81 is improved to solve the above problems.

FIG. 1 shows a normal polling sequence in the polling method of the present invention.
In the figure, P (x) is polling for station X, PS (x)
Indicates a polling response instruction to the station X, and A (x) indicates a response from the station X. As shown in the figure, station 1 sequentially polls stations 2 to n, one station at a time, then sends a response instruction, and station X responds to this by repeating the procedure of responding to each station. To collect information on.

FIG. 2 shows a time chart in the normal state in the polling method of the present invention. T in the figure
The line indicates the transmission line of the station 1 and the R line indicates the reception line of the station 1. PC
(X) is a command packet for polling station X, P
S (x) is a response instruction packet for polling station X, A
(X) indicates a response from the station X.

FIG. 3 shows the information collection time under normal conditions in the polling method of the present invention. The information collection time T is the command packet time to the station X PCt
(X), PSt is the response instruction packet time to station X
(X), the response time from the station X is At (x), the delay time to the station X is Dtx, and the processing time of the station 1 is Bt1, T = (PCt2 + ... + PCtn) + (PSt2 + ... + PStn) + ( At2 + ... + Atn) + (Dt2 + ... + Dtn) + Bt1 * n (3)

Since the response instruction packet PS (x) may be output immediately after the command packet PC (x) is output, the waiting time Wt is almost 0, so it cannot be calculated.

FIG. 4 shows a polling sequence in the polling system of the present invention when the monitored station has a large amount of information, and shows the case where the station 3 has a large amount of information. In the figure, AW (x) is an extension request command for the response of the station X.

When receiving the response instruction packet PS (3), the station 3 sends an expansion request command AW (3) because the amount of information to be responded is large. This extends the time of the response A (3) of the station 3 in the next sequence.

FIG. 5 is a time chart when the monitored station has a large amount of information in the polling method of the present invention, and shows the case where the station 3 has a large amount of information.
As illustrated, the station 3 sends the extension request command AW (3), so that the response time region of the response A (3) of the station 3 is extended in the next sequence.

FIG. 6 shows a polling sequence when the monitored station in the polling method of the present invention fails, and shows the case where the station 3 fails. As shown in the figure, since the response A (3) does not arrive because the station 3 has failed, the station 1 waits for a predetermined waiting time and then sends the polling P (4) to the next station 4.

FIG. 7 is a time chart when the monitored station in the polling system of the present invention fails, and shows the case where the station 3 fails. As shown in the figure, since the response A (3) does not arrive because the station 3 has failed, the station 1 waits for a predetermined waiting time and then the next station 4
Polling command packet PC (4)
Then, the response instruction packet PS (4) is transmitted.

FIG. 8 shows a polling sequence in the case where the transmission line is cut off in the polling method of the present invention, and shows the case where the transmission line is cut off at point A on the station 1 side. Since the station 1 does not receive the response from each monitored station, the station 1 waits for a predetermined waiting time for each monitored station, and then sends polling to the next monitored station.

FIG. 9 is a time chart in the case where the transmission line is cut off in the polling method of the present invention, and shows the case where the transmission line is cut off at point A on the station 1 side. Since station 1 does not receive the response from each monitored station, it waits for a predetermined waiting time for each monitored station, and then polls command packet P for the next monitored station.
C (x) and the response instruction packet PS (x) are transmitted.

FIG. 10 shows a polling sequence in the case where the response processing of the monitored station is delayed in the polling method of the present invention, in which the response processing of the stations 2 and 4 in response to the polling from the station 1 is performed. It shows the case of delay.

FIG. 11 shows a time chart in the case where there is a delay in the response processing of the monitored station in the polling method of the present invention.
And the case where the response processing of the station 4 is delayed. In this case, in the R line, the response A (4) of the station 3 overlaps with the response A (2) of the station 2 due to the delay of the response processing of the station 2 and the station 4
The response A (5) of station 5 is delayed by station 4
Of the response A (4) of FIG.

FIG. 12 is a time chart when the response processing of the monitored station in the polling method of the present invention may be delayed. It is shown that the response instruction packet is delayed with respect to the polling command packet and comes after the next command packet.

FIG. 13 illustrates the information collection time when the response processing of the monitored station in the polling method of the present invention may be delayed. The information collection time T for all stations in the case of FIG. 13 is as follows. Here, PCt (x), PSt (x), At (x), Dt
(X) and Bt1 are the same as in the case of FIG. T = (PCt2 ++ ... + PCtn) + (PSt2 + ... + PStn) + (At2 + ... + Atn) + (Dt2 + ... + Dtn) + Bt1 × n ... (4)

Since the response instruction packet PS (x) may be output immediately after the command packet PC (x) is output, the waiting time Wt is almost 0, so it cannot be calculated.

FIG. 14 is a diagram (1) showing a transmission format in the polling method of the present invention, in which (a) is a transmission format 1, (b) is a specific example of a synchronization command, and (c) is an extension instruction. It is a specific example of command 1.

In the case of the transmission format 1, FIG. 14 (a)
As shown in, the command includes a polling command, a response command, a synchronization command shown in (b),
There is an extension instruction command 1 shown in (c).

In the synchronization command shown in FIG. 14B, the command 03 means a synchronization packet and the source address 01 means that the source is the station 1. The transmission destination address 02 means that the transmission destination is the station 2, and when there are 30 stations to poll, it changes from 2 to 30. The data length 0000 means that there is no data, and there is no data because it is a synchronization packet.

In the extended instruction command 1 shown in FIG. 14C, the command 04 means an extended instruction packet, the source address 02 means that the source is station 1, and the station polling is 2 if there are 30 stations
It varies from ~ 30. The destination address 01 means that the destination is station 1. The data length 0004 means that the data has four octets, and the data means that seven frames with a packet length of 256 octets should be prepared.

FIG. 15 is a diagram (2) showing a transmission format in the polling method of the present invention, in which (a) is the transmission format 2. (B) and (c) are specific examples of the extension instruction command 2, and (b) is a continuous extension instruction,
(C) is a temporary extension instruction.

In the case of the transmission format 2, FIG. 15 (a)
As shown in FIG. 14, the command includes a polling command, a response command, a synchronization command shown in FIG.
There is an extension instruction command 2 shown in FIG. The extension instruction command 2 includes a continuous extension instruction command shown in FIG. 15B and a temporary extension instruction command shown in FIG. 15C.

In the continuous extension instruction command shown in FIG. 15B, the command 04 means a continuous extension instruction packet, the source address 02 means that the source is the station 2, and the station to poll. If there are 30 stations, it changes from 2 to 30. The destination address 01 means that the destination is station 1. Data length 0004
Means that the data has four octets, and the data means that seven frames with a packet length of 256 octets should be prepared.

In the temporary extension instruction command shown in FIG. 15C, the command 05 means a temporary extension instruction packet, the source address 02 means that the source is station 2, and the station to poll. If there are 30 stations, it changes from 2 to 30. The destination address 01 means that the destination is station 1. Data length 0004
Means that the data has four octets, and the data means that seven frames with a packet length of 256 octets should be prepared.

Specific means for solving the problems of the present invention will be listed below.

(1) The monitoring station (station 1) sequentially calls up a plurality of monitored stations (stations 2 to n), and each monitored station responds to this, so that the monitoring station can monitor each monitored station. In the remote monitoring control system of the polling / selecting method that collects the information of the above, the communication processing unit of the monitoring station sequentially sends a polling command designating the polling destination to each monitored station at a fixed cycle determined by a timer. At the same time, the synchronization command transmission unit (2
In 3), when the transmission of a polling command to each monitored station is detected, a synchronization command with a destination address determined according to the destination address in this polling command is generated and transmitted. , Instruct the response from each monitored station.

(2) In the case of (1), the synchronization command transmission section (23) is provided with the transmission destination address arithmetic unit (35) so that the transmission destination of the synchronization command is different from the monitored station by the set amount. Allow shift to destination address.

(3) In the case of (1), an extension instruction command detector (24) for detecting an extension instruction command from the monitored station for instructing extension of the response area of the monitored station is provided, and In the synchronous command sending section (23),
A value corresponding to the normal polling cycle set in the memory (43) in the timer control section by providing a timer control section (36) for controlling the set time of the timer (34) that determines the cycle for sending the polling command. And a value determined according to an expansion instruction from the monitored station, the cycle of polling command transmission can be adjusted for each monitored station.

(4) In the case of (1), an extension instruction command detection unit (24) for detecting an extension instruction command from the monitored station for instructing extension of the response area of the monitored station is provided, and In the synchronous command transmission unit (23), a timer (3
4) A timer control unit (36) for controlling the set time is provided, and a value corresponding to a normal polling period set in the memory (43) in the timer control unit and an extension instruction from the monitored station are provided. It is possible to adjust the polling command transmission cycle for each monitored station by selecting the specified value from the above, and to set the transmission destination of the synchronous command by providing the transmission destination address calculator (35). It is possible to shift to the destination address of the monitored station that differs by the amount.

(5) In the case of (1), an extension instruction command detection unit (24) for detecting an extension instruction command from the monitored station instructing extension of the response area of the monitored station is provided, and In the synchronous command transmission unit (23), a timer (3
4) A timer control unit (36) for controlling the set time is provided, and a value corresponding to the normal polling period set in the first memory (43) in the timer control unit and continuation from the monitored station By selecting a value selected from a value determined according to the expansion instruction and a value determined according to the temporary expansion instruction from the monitored station set in the second memory (44). , It is possible to adjust the cycle of polling command transmission for each monitored station continuously or temporarily.

(6) In the case of (1), an extension instruction command detector (24) for detecting an extension instruction command from the monitored station for instructing extension of the response area of the monitored station is provided, and In the synchronous command transmission unit (23), a timer (3
4) A timer control unit (36) for controlling the set time is provided, and a value corresponding to the normal polling period set in the first memory (43) in the timer control unit and continuation from the monitored station By selecting a value selected from a value determined according to the expansion instruction and a value determined according to the temporary expansion instruction from the monitored station set in the second memory (44). , The polling command transmission cycle can be adjusted continuously or temporarily for each monitored station, and a destination address calculator (35) is provided to change the destination of the synchronization command by a set amount. Allow shift to the destination address of the monitoring station.

(7) The monitoring station (station 1) sequentially calls up a plurality of monitored stations (stations 2 to n), and each monitored station responds to this, so that the monitoring station can monitor each monitored station. In the remote monitoring control system of the polling / selecting method for collecting the information of the above, when the communication processing unit of the monitored station detects the synchronization command addressed to itself by the synchronization command detection unit (25), The information of the monitored station is sent to the monitoring station by a response command.

(8) In the case of (7), in the communication processing unit,
A transmission data storage unit (2 that stores response data to be transmitted)
6) is provided, and when the synchronization command addressed to the own station is detected, the information stored in the transmission data storage unit is transmitted by the response command.

The operation of the present invention will be described below. In a normal state, in the station configuration shown in FIG. 70, in the time chart shown in FIG. 2, polling is performed and the response instruction packet PS (x) is sent out so that the polling sequence shown in FIG. By receiving, the polling / selecting method is realized at the interval of the response A (x).

When the response station X confirms the response instruction packet PS (x) for itself, the response station X immediately returns a response, so that the response A (x) is generated in the time relationship shown in FIG. In this case, the response instruction packet PS (x) is required because, for example, the response station polls the command packet P.
In the case of a system in which the response processing time is not in time after receiving C (x), the response instruction packet PS (x) and the command packet PC (x) have the relationship shown in FIG.
This is because it is possible to deal with this by arranging.

In the system having the polling sequence shown in FIG. 1, when normal operation and monitoring of all stations are not possible, the polling operation is performed in a time relationship as shown in FIG. In this case, the information collection time T of all stations is
It is expressed by equation (3).

Here, assuming that the transmission speed is 9600 bps, the number of monitoring stations is 50, and the time required for each element is calculated, the polling occupied time PCtx is the transmission format shown in FIG. PCtx = 1 / 9600bps × 5oct × 8bit = 4.2
ms

The response instruction packet occupation time PStx is PStx = 1/9600 bps × 5oct × 8bit = 4.2 with the information amount of 5oct in the transmission format shown in FIG.
ms

The response occupation time Atx is 21 oct, since the information amount of the response frame is 21 oct when the data length is 16 oct in the transmission format shown in FIG. 8. Therefore, Atx = 1/9600 bps × 21 oct × 8 bit = 17.
5 ms

Therefore, the information collection time T of all stations is calculated by the equation (3).
From: T = (PCtx + PStx + Atx) × 50 stations = 1, 2
According to the present invention, the information collection time is 95 ms, which is very close to that of the conventional method even though the response instruction packet is inserted. This value does not change even when all stations cannot be monitored.

Therefore, according to the present invention, it becomes possible to shorten the time required for collecting information of all stations regardless of the states of the monitored station and the transmission path.

[0082]

BEST MODE FOR CARRYING OUT THE INVENTION A configuration for realizing the present invention will be described below. In the present invention, the parts relating to the generation and processing of various commands, except the processing of transmission / reception data generation and analysis, are configured by hardware, and the information collection time is shortened by speeding up the operation. . In the following, the response instruction command is called a synchronization command.

FIG. 16 shows an example of the basic configuration of the communication processing unit in the monitoring station, in which the same components as those in FIG. Reference numeral 23 denotes a synchronization command sending unit, which sets a sending timing according to a timer set value corresponding to a command sending interval from the CPU 21, and sets a CP.
The U21 is notified and the synchronization command generated according to the destination address on the transmission data line is transmitted to the transmission data line.

FIG. 17 shows an example of a configuration in which the communication processing unit of the monitoring station has an extension instruction command detection unit. The same components as those in FIG. The instruction command detection unit detects an extension instruction command from the received data line and extends the response instruction area to the synchronization command transmission unit 23.
Make settings to change the timer setting value.

FIG. 18 shows an example of the basic configuration of the communication processing unit in the monitored station. The same components as those in FIG. 67 are designated by the same numbers. Reference numeral 25 denotes a synchronization command detection unit, which when the synchronization command on the reception data line is determined to be addressed to its own station, the CPU 2
A response command transmission permission is sent to 1.

FIG. 19 shows a configuration example in which the communication processing unit of the monitored station has a transmission data storage unit, and the same components as those in FIG. 18 are indicated by the same numbers. Reference numeral 26 denotes a transmission data storage unit, which is the communication LSI 2
The transmission data from No. 2 is stored in the built-in memory, and is transmitted to the transmission data line in response to the transmission permission of the response command from the synchronous command detection unit 25.

FIG. 20 shows an example of the basic configuration of the synchronization command sending section. Synchronization command generator 31
In accordance with the destination address, the synchronization command is generated in accordance with the format shown in FIG. 14, and when the polling packet detection unit 32 detects the polling command, in response to the instruction from the timing generation unit 33. , While outputting the synchronization command to the transmission data line and ending the count of the set value in the timer 34,
The CPU 21 outputs the notification of the end of the interval time of the transmission timing to the CPU 21.

FIG. 21 shows a concrete example of the structure of the synchronization command transmission section having the synchronization command shift function, and the same elements as those in FIG. 20 are indicated by the same numbers. When there is a delay in the response processing in the monitored station, the transmission destination address calculator 35 calculates the difference with respect to the transmission destination address according to the shift amount set value to generate the shifted transmission destination address, and synchronizes it. The command generation unit 31 generates a synchronization command with the shifted destination address and sends it to the transmission data line. In this case, the set value of the timer 34 is not changed.

FIG. 22 shows a concrete example of the structure of the synchronization command transmitting section when an extension instruction is given.
The same parts as those in FIG. 20 are indicated by the same numbers. 36
Is a timer control unit, which normally sets the destination address and timer value from the control line 2 and sets the destination address and timer value from the control line 4 when an extension instruction is received. , A timer value is set in the timer 34 according to the destination address on the transmission data line.

FIG. 23 shows a specific example of the structure of a synchronization command transmission section having a synchronization command shift function when an extension instruction is given. The same components as those in FIG. 22 are designated by the same numbers. . Destination address calculator 3
As in the case of FIG. 21, when there is a delay in the response processing in the monitored station, 5 is for calculating the difference with respect to the destination address according to the shift amount set value and generating the shifted destination address. Then, the synchronization command generation unit 31 generates a synchronization command with the shifted destination address and sends it to the transmission data line.

FIG. 24 shows a basic configuration example of the timer control section. The address decoder 41 switches the selector 42 according to the address of the monitored station on the control line 2, and the selector 42 continuously expands the normal timer value corresponding to the normal address in response to the write instruction. And the timer value at the time of extension corresponding to the address at the time of the extension instruction is written in the memory 43 for continuous extension.
Then, the timer value is read from the memory 43 for continuous extension according to the destination address.

FIG. 25 shows a configuration example of a timer control unit having a temporary extension function, and the same components as those in FIG. 24 are designated by the same numbers. Memory 4 for temporary expansion
In 4, an extension timer value corresponding to the extension instruction address is written in accordance with the write instruction. In addition, a temporary expansion instruction corresponding to the expansion instruction address is written in the temporary expansion instruction memory 45 in response to the write instruction.
Then, the presence / absence of a temporary expansion instruction is read from the temporary expansion instruction memory 45 according to the destination address, and if there is no temporary expansion, the continuous expansion memory 43 is enabled and a timer corresponding to the destination address is read. The value is read out, and if there is temporary expansion, the memory 44 for temporary expansion is validated and the timer value corresponding to the destination address is read out.

FIG. 26 illustrates the contents of the memory in the timer control section. (A) shows the contents of the memory for continuous expansion, (b) shows the contents of the memory for temporary expansion, and the address ( The extended amount data of the timer value is written according to the station number).

FIG. 27 shows an example of the basic configuration of the extension instruction command detecting section. Source address latch 5
1 latches and outputs the address of the transmission source of the extension instruction command on the reception data line. The expansion amount detector 52 integrates the number of frames designated by the expansion instruction command and the data length to detect and latch the expansion amount. The extension instruction packet detection unit 53 detects the extension instruction packet on the reception data line and outputs a write instruction to the control line 4 at the timing instructed by the timing generation unit 54. At this time, the expansion amount numerical value of the expansion amount detecting unit 52 is simultaneously output.

FIG. 28 shows an example of the configuration of the extension instruction command detecting section having the temporary extension instruction detecting section, and the same elements as those in FIG. 27 are indicated by the same numbers. The temporary extension instruction packet detection unit 55 detects the temporary extension instruction packet in the synchronization packet, and when the extension instruction packet detection unit detects the extension instruction packet, at the timing instructed by the timing generation unit 54, the control line 4 The write instruction is output to and the temporary extension instruction is output. Other operations are similar to those in the case of FIG.

FIG. 29 shows an example of the structure of the synchronization command detecting section. When the synchronization packet detection unit 61 detects the synchronization packet on the reception data line and the transmission destination address detection unit detects that the transmission destination address on the reception data line matches the address of the own station, the timing generation unit The transmission permission is output to the control line 4 at the timing indicated by 63.

FIG. 30 shows an example of the structure of the transmission data storage section. When the write permission is received, the data of the transmission data line is written to the memory 72 according to the address value of the write address counter 71 based on the setting of the counter value from the CPU, and when the transmission permission is received, the CP
According to the address value of the read address counter 73 based on the setting of the counter value from U, the data in the memory 72 is read and output to the transmission data line.

FIG. 31 is a processing flow (1) of the communication processing unit.
The operation of the polling station (monitoring station) in the case where the polling station (monitoring station) has a synchronization command sending unit of the basic configuration shown in FIG. To do.

FIG. 32 is a processing flow (2) of the communication processing unit.
In the polling station (monitoring station), as an internal circuit, there is provided a synchronization command transmission section having a synchronization command shift correspondence type configuration shown in FIG. 21 with respect to the basic configuration shown in FIG. The operation in this case will be described.

FIG. 33 shows the processing flow of the communication processing section (3).
FIG. 17 is a diagram for explaining the operation in the case where the polling station (monitoring station) has the extended instruction command detection section and the synchronization command transmission section shown in FIG. 17 as internal circuits.

FIG. 34 is a processing flow (4) of the communication processing unit.
FIG. 19 is a diagram for explaining the operation of the responding station (monitored station) when it has the basic configuration shown in FIG.

FIG. 35 is a processing flow (5) of the communication processing unit.
FIG. 19 is a diagram illustrating an example of the operation of the response station (monitored station) when the response station (monitored station) has the configuration including the transmission data storage unit illustrated in FIG.

FIGS. 36 and 37 are diagrams (1/2) and (2) showing the operation time chart (1) of the synchronization command sending section.
/ 2) in the case of the basic configuration example shown in FIG. 20, and it is assumed that the timer set value register is already set by the CPU, and the value is 16.

38 and 39 are diagrams (1/2) and (2) showing the operation time chart (2) of the synchronization command transmitting section.
/ 2) in the case of the configuration example corresponding to the command shift for synchronization shown in FIG. 21, and the timer set value register is C
It is assumed that it has already been set by the PU, and the value is 1
6 is assumed. Also, the shift amount of the destination address calculator is
It is assumed that it has already been set by the CPU, and the value is 1
And In the figure, n is the maximum station number.

40 and 41 are diagrams (1/2) and (2) showing an operation time chart (3) of the synchronization command transmitting section.
22) in the case of the basic configuration example for performing the extension instruction shown in FIG. 22, and it is assumed that the memory 43 for continuous extension of the timer control unit is already set by the CPU,
Its value shall be determined by FIG. FIG.
0, FIG. 41 shows a time chart for the stations 2 to 3.

42 and 43 are diagrams (1/2) and (2) showing the operation time chart (4) of the synchronization command sending section.
/ 2), which is a configuration example of performing the extension instruction shown in FIG. 22, and is a memory 43 for continuous extension of the timer control unit.
Is already set by the CPU, and its value is determined by FIG. 42 and 43 show time charts for the stations 5 to 6.

44 and 45 are diagrams (1/2) and (2) showing an operation time chart (5) of the synchronization command sending section.
/ 2), in the case of performing the extension instruction shown in FIG.
It is assumed that the memory 43 for continuous expansion of the timer control unit is already set by the CPU, and its value is determined by FIG. Further, the shift amount of the destination address calculator is assumed to be already set by the CPU, and its value is set to 1. 44 and 45 show time charts for the stations 2 to 3. In the figure, n is the maximum station number.

46 and 47 are diagrams (1/2) and (2) showing the operation time chart (6) of the synchronization command transmitting section.
/ 2), in the case of performing the extension instruction shown in FIG.
It is assumed that the memory 43 for continuous expansion of the timer control unit is already set by the CPU, and its value is determined by FIG. Further, the shift amount of the destination address calculator is assumed to be already set by the CPU, and its value is set to 1. 46 and 47 show time charts for the stations 5 to 6. In the figure, n is the maximum station number.

48 and 49 are diagrams (1/2) and (2) showing the operation time chart (7) of the synchronization command sending section.
/ 2), in the case of performing the extension instruction shown in FIG.
It is assumed that the memory 43 for continuous expansion of the timer control unit is already set by the CPU, and its value is determined by FIG. The shift amount of the destination address computing unit is set by the CPU, and its value is set to 1. 48 and 49 show stations 6 to 7.
Shows a time chart for. In the figure, n is the maximum station number.

50 and 51 are diagrams (1/2) and (2/2) showing the operation time chart (1) of the timer control section, showing the case of the basic configuration example shown in FIG. CPU
The initialization operation according to FIG. All values in this time chart are hexadecimal. Also, the condition that the output of the address decoder becomes active [1] is [2X
XXh].

52 and 53 are diagrams (1/2) and (2/2) showing the operation time chart (2) of the timer control section, and the extension instruction in the case of the basic configuration example shown in FIG. The write operation from the command detection unit will be described. All values in this time chart are hexadecimal. Also, the output of the address decoder is active [1].
The condition that satisfies the above condition is [2XXXh]. Furthermore, already C
It is assumed that the initialization from PU is completed.

FIGS. 54 and 55 are diagrams (1/2) and (2/2) showing the operation time chart (3) of the timer control section, and the read operation in the case of the basic configuration example shown in FIG. To explain. All values in this time chart are hexadecimal. Further, the condition that the output of the address decoder becomes active [1] is [2XXXh].

56 and 57 are diagrams (1/2) and (2/2) showing the operation time chart (4) of the timer control section, showing an example of the configuration having the temporary extension function shown in FIG. The write operation of the memory 44 for temporary expansion and the memory 45 for temporary expansion instruction will be described. All values in this time chart are hexadecimal.

58 and 59 are diagrams (1/2) and (2/2) showing the operation time chart (5) of the timer control section, showing an example of the configuration having the temporary extension function shown in FIG. The read operation of the temporary expansion memory 44 and the temporary expansion instruction memory 45 in this case will be described. All values in this time chart are hexadecimal.

FIG. 60 is a diagram showing an operation time chart (1) of the extension instruction command detection unit, and illustrates the operation in the case of the basic configuration example shown in FIG. The operation for the expansion instruction command from the station 3 is shown.

FIG. 61 is a diagram showing an operation time chart (2) of the extension instruction command detecting section, and illustrates the operation in the case of the continuous extension instruction in the configuration example having the temporary extension instruction detecting section shown in FIG. To do. The operation for the continuous extension instruction command from the station 3 is shown.

FIG. 62 is a diagram showing an operation time chart (3) of the extension instruction command detecting section, and illustrates the operation in the case of the temporary extension instruction in the configuration example having the temporary extension instruction detecting section shown in FIG. To do. The operation for the temporary extension instruction command from the station 3 is shown.

FIG. 63 is a diagram showing an operation time chart of the synchronization command detecting portion, and is for explaining the operation in the case of the configuration example shown in FIG. In the case of FIG. 63, the source address register is set to the station number for each station. In this example, the number of stations is 03.

FIGS. 64 and 65 are diagrams (1/2) and (2/2) showing the operation time chart of the transmission data storage section, for explaining the operation in the case of the configuration example shown in FIG. Is. The numbers in this time chart are hexadecimal numbers.
It is assumed that the data 00 is written in the address 00 of the memory. The counter value setting register has C
It is assumed that the transmission data number 0B has already been written from the PU.

The preferred embodiments of the present invention will be described below. In the embodiment (1) of the present invention, in a polling / selecting type supervisory control system as shown in FIG. 70, a supervisory station (station 1) having a basic configuration as shown in FIG. After sending the polling command from the LSI 22, the synchronizing command sending unit 23 creates a sending command for instructing the response of the monitored station and sends it to the monitored station. The monitored station prepares response data by software in response to the polling command, and when receiving the synchronization command, sends it out by the response command.

The synchronization command has the format shown in FIG. 14 (b). In this case, it is generated by the synchronization command transmission section having the basic structure shown in FIG. 20 and transmitted to the transmission data line. It FIG. 2 shows a time chart of the transmission of the polling command and the synchronization command from the monitoring station at this time and the transmission of the response command of the monitored station from the R line.

Therefore, unlike the conventional method, it is not necessary to wait for the response command from the monitored station (stations 2 to n) to send the next polling command, so that the polling cycle is fixed. be able to. Since the commands for the monitoring station and the monitored station are generated and transmitted by hardware, transmission / reception time can be shortened.

In the embodiment (2) of the present invention, FIG.
A monitoring station (station 1) having a basic configuration as shown in 6
The synchronization command transmission unit 23 generates a synchronization command having the format shown in FIG. 14B and transmits it to the monitored station.

In this case, in the synchronous command generator having the synchronous command shift corresponding type structure shown in FIG.
After shifting by the set shift amount, a synchronization command is generated and sent to the transmission data line. FIG. 12 shows a time chart of the transmission of the polling command and the synchronization command from the monitoring station at this time and the transmission of the response command of the monitored station from the R line.

According to this embodiment, if there is a possibility that the response processing of the monitored station will be delayed with respect to the polling command of the monitoring station, the synchronization command is shifted in advance and sent out. It is not necessary to send the next polling command after waiting for the arrival of a response command from the monitored station (stations 2 to n), so that the polling cycle can be made constant.

In the embodiment (3) of the present invention, FIG.
The monitoring station (station 1) having the configuration having the extension instruction command detection unit 24 as shown in FIG.
In, the synchronization command having the format shown in FIG. 14B is generated and sent to the monitored station.

In this case, in the synchronous command transmission section having the configuration shown in FIG. 22, the polling command from the communication processing LSI 22 is set for the time set in the timer control section 36 according to the setting from the extension instruction command detection section. Delay the delivery of. The time chart of the T and R lines in this case is as shown in FIG.

The set time of the timer control section 36 at this time is
In the configuration of the timer control unit shown in FIG. 24, it is determined by setting in the memory 43 according to the expansion instruction from the monitored station.

According to this embodiment, when the monitored station has a large amount of information to be responded to, the extended command is issued from the monitored station by the response command, and in the next sequence, the response command to the monitored station is sent. It is possible to adjust the polling period for expanding the area of each station for each station.

In the embodiment (4) of the present invention, FIG.
The monitoring station (station 1) having the configuration having the extension instruction command detection unit 24 as shown in FIG.
In, the synchronization command having the format shown in FIG. 14B is generated and sent to the monitored station.

In this case, in the synchronous command generating unit having the configuration shown in FIG. 23, the polling command from the communication processing LSI 22 is set for the time set in the timer control unit 36 according to the setting from the extended command detecting unit. The transmission is delayed, and the command shift function shifts the synchronization command in advance and transmits it.

The set time of the timer control unit 36 at this time is
In the configuration of the timer control unit shown in FIG. 24, it is determined by setting in the memory 43 according to the expansion instruction from the monitored station.

According to this embodiment, when there is a possibility that the response processing of the monitored station may be delayed with respect to the polling command of the monitoring station, the synchronization command is shifted in advance and sent out to set the polling cycle. When the monitored station has a large amount of information to respond, the monitored station issues an expansion command with a response command to expand the area of the response command for that monitored station in the next sequence. The polling cycle can be adjusted.

In the embodiment (5) of the present invention, FIG.
The monitoring station (station 1) having the configuration having the extension instruction command detection unit 24 as shown in FIG.
In, the synchronization command having the format shown in FIG. 14B is generated and sent to the monitored station.

In this case, in the synchronous command generation unit having the configuration shown in FIG. 22, the polling from the communication processing LSI 22 is performed for the time set in the timer control unit 36 according to the setting from the extended command detection unit. Delay the sending of commands.

Further, in the setting time of the timer control unit 36 at this time, in the configuration of the timer control unit shown in FIG. 25, the continuous expansion is set in the memory 43 according to the expansion instruction from the monitored station, and A temporary expansion setting can be made in the memory 44.

According to this embodiment, when there is a large amount of information to be responded to by the monitored station, the monitored station issues an expansion request by a response command, and in the next sequence, a response command for that monitored station is sent. The control for continuously adjusting the polling period for expanding the area of and the control for temporarily performing it can be performed for each station.

In the embodiment (6) of the present invention, FIG.
The monitoring station (station 1) having the configuration having the extension instruction command detection unit 24 as shown in FIG.
In, the synchronization command having the format shown in FIG. 14B is generated and sent to the monitored station.

In this case, in the synchronous command generator having the configuration shown in FIG. 23, the polling from the communication processing LSI 22 is performed for the time set in the timer controller 36 according to the setting from the extended command detector. The command transmission function delays the command transmission, and the command shift function pre-shifts and transmits the synchronous command.

Further, in the setting time of the timer control unit 36 at this time, in the configuration of the timer control unit shown in FIG. 25, the continuous expansion is set in the memory 43 according to the expansion instruction from the monitored station, and A temporary expansion setting can be made in the memory 44.

According to this embodiment, when the response processing of the monitored station may be delayed with respect to the polling command of the monitoring station, the polling cycle is set by shifting the synchronization command in advance and transmitting it. When the monitored station has a large amount of information to respond, the monitored station issues an expansion command with a response command to expand the area of the response command for that monitored station in the next sequence. Adjust the polling cycle continuously and temporarily.
It can be done for each station.

In the embodiment (7) of the present invention, FIG.
In the supervisory control system of the polling / selecting method as shown in 0, the monitored stations (stations 2 to n) having the basic configuration as shown in FIG. After receiving the polling command from the station and receiving the synchronization command shown in FIG. 14B, when the synchronization command detection unit 25 detects this, the response data is transmitted by the response command.

In the embodiment (8) of the present invention, FIG.
In the monitoring control system of the polling / selecting method as shown in 0, monitored stations (stations 2 to n) having the basic configuration as shown in FIG. After receiving the polling command from the station and then receiving the synchronization command shown in FIG. 14 (b) and the synchronization command detection unit 25 detects this, the transmission data storage unit 26 is preliminarily responsive to the polling command. The stored response data is sent by the response command.

According to this embodiment, since the response data is stored in advance in the transmission data storage unit 26 in response to the polling command, it is possible to reduce the burden on the CPU 21 for sending the response.

In the embodiment (9) of the present invention, FIG.
In the supervisory control system of the polling / selecting method as shown in 0, as shown in the time chart of FIG. 2, the monitoring station sends the polling command for polling the monitored station, and then the monitored station By sending a synchronization command instructing a response, the timing of sending the response command is instructed to each monitored station.

According to this embodiment, the monitored station can separate the preparation of the response data based on the polling instruction and the transmission timing of the response command for transmitting the response data. Is prepared, and it is possible to have a margin of processing time as compared with the case of the conventional method of transmitting a response command.

In the embodiment (10) of the present invention, in the polling / selecting type supervisory control system as shown in FIG. 70, the monitored station responds with the amount of information as shown in the time chart of FIG. 14C, the expansion instruction command shown in FIG. 14C is sent to the monitoring station to request expansion of the time area occupied by the response command of the own station in the subsequent sequence and thereafter.

According to this embodiment, when the monitored station has a large amount of information to respond, it can request the monitoring station to extend the occupied time of the response command of its own station. It is possible to prevent the situation in which the response data of the own station cannot be completely transmitted.

In the embodiment (11) of the present invention, in the polling / selecting type supervisory control system as shown in FIG. 70, as shown in the time chart of FIG. When there is a large number, the continuous extension instruction command shown in FIG.
Request continuous expansion of the time area occupied by the response command of the local station.

According to this embodiment, when the monitored station has a large amount of information to respond, it can request the monitoring station to continuously extend the occupied time of the response command of its own station. It is possible to continuously prevent the situation in which the response data of the own station cannot be completely transmitted by the response of.

In the embodiment (12) of the present invention, in the polling / selecting type supervisory control system as shown in FIG. 70, the monitored station responds with the information amount as shown in the time chart of FIG. When there is a large number, the temporary extension instruction command shown in FIG.
Request to temporarily expand the time area occupied by the local station's response command.

According to this embodiment, when the monitored station has a large amount of information to respond, it can request the monitoring station to temporarily extend the occupied time of the response command of its own station. It is possible to temporarily prevent the occurrence of a situation in which the response data of the own station cannot be transmitted by the response of.

[0153]

As described above, according to the present invention, in the polling / selecting system in which the information of a large number of stations is collected by polling, by adopting the above configuration, the transmission delay of the line is large and the monitored station In a large number of systems, the collection time of monitoring information can be shortened as compared with the conventional method.

Further, in a system in which the transmission delay of the line is large and the number of monitoring stations is large, when there are two or more monitored stations that are not responding, the method of the present invention has a longer collection time of the monitoring information than the conventional method. Is short, especially when the number of monitored stations is large, this effect is remarkable.

Further, in a system in which the amount of response information of each monitored station is large, even if the transmission delay time is short, if the number of monitored stations is large and two or more stations are not responding, the method of the present invention is used. However, compared with the conventional method, the collection time of the monitoring information is short, and this effect becomes large especially when the number of monitored stations is large.

[Brief description of the drawings]

FIG. 1 is a diagram showing a normal polling sequence in a polling system of the present invention.

FIG. 2 is a diagram showing a time chart when the polling method of the present invention is normal.

FIG. 3 is a diagram showing a normal time information collection time in the polling method of the present invention.

FIG. 4 is a diagram showing a polling sequence when a monitored station has a large amount of information in the polling method of the present invention.

FIG. 5 is a diagram showing a time chart when the monitored station has a large amount of information in the polling method of the present invention.

FIG. 6 is a diagram showing a polling sequence when a monitored station fails in the polling method of the present invention.

FIG. 7 is a diagram showing a time chart when a monitored station fails in the polling method of the present invention.

FIG. 8 is a diagram showing a polling sequence in the case of a transmission line disconnection in the polling method of the present invention.

FIG. 9 is a diagram showing a time chart in the case of a transmission line disconnection in the polling method of the present invention.

FIG. 10 is a diagram showing a polling sequence in the case where the response processing delay of the monitored station in the polling method of the present invention is delayed.

FIG. 11 is a diagram showing a time chart in the case where there is a delay in the response processing of the monitored station in the polling method of the present invention.

FIG. 12 is a diagram showing a time chart in the case where the response process of the monitored station in the polling method of the present invention may be delayed.

FIG. 13 is a diagram illustrating the information collection time when the response process of the monitored station in the polling method of the present invention may be delayed.

FIG. 14 is a diagram (1) showing a transmission format in the polling method of the present invention, in which (a) is a transmission format 1, (b) is a concrete example of a synchronization command, and (c) is a concrete example of an extended command 1. Is.

FIG. 15 is a diagram (2) showing a transmission format in the polling method of the present invention, in which (a) is the transmission format 2; (B) and (c) are specific examples of the extension instruction command 2, where (b) is a continuous extension instruction and (c) is a temporary extension instruction.

FIG. 16 is a diagram illustrating a basic configuration example of a communication processing unit in a monitoring station.

FIG. 17 is a diagram showing a configuration example in the case where the communication processing unit of the monitoring station has an extension instruction command detection unit.

FIG. 18 is a diagram illustrating a basic configuration example of a communication processing unit in a monitored station.

FIG. 19 is a diagram showing a configuration example in the case where the communication processing unit of the monitored station has a transmission data storage unit.

FIG. 20 is a diagram showing a basic configuration example of a synchronization command transmission unit.

FIG. 21 is a diagram illustrating a specific configuration example of a synchronization command transmission unit having a synchronization command shift function.

FIG. 22 is a diagram showing a specific configuration example of a synchronization command transmission unit when an extension instruction is given.

[Fig. 23] Fig. 23 is a diagram illustrating a specific configuration example of a synchronization command transmission unit having a synchronization command shift function when performing an extension instruction.

FIG. 24 is a diagram showing a basic configuration example of a timer control unit.

FIG. 25 is a diagram showing a configuration example of a timer control unit having a temporary extension function.

FIG. 26 is a diagram for explaining the contents of the memory in the timer control unit, where (a) shows the contents of the memory for continuous expansion and (b) shows the contents of the memory for temporary expansion.

FIG. 27 is a diagram showing a basic configuration example of an extension instruction command detection unit.

FIG. 28 is a diagram illustrating a configuration example of an extension instruction command detection unit having a temporary extension instruction detection unit.

[Fig. 29] Fig. 29 is a diagram illustrating a configuration example of a synchronization command detection unit.

FIG. 30 is a diagram showing a configuration example of a transmission data storage unit.

FIG. 31 is a diagram illustrating a processing flow (1) of the communication processing unit.

FIG. 32 is a diagram illustrating a processing flow (2) of the communication processing unit.

FIG. 33 is a diagram illustrating a processing flow (3) of the communication processing unit.

FIG. 34 is a diagram illustrating a processing flow (4) of the communication processing unit.

FIG. 35 is a diagram illustrating a processing flow (5) of the communication processing unit.

FIG. 36 is a diagram (1/2) showing the operation time chart (1) of the synchronization command transmission unit.

FIG. 37 is a diagram (2/2) showing the operation time chart (1) of the synchronization command transmission section.

FIG. 38 is a diagram (1/2) showing an operation time chart (2) of the synchronization command transmission unit.

FIG. 39 is a diagram (2/2) showing an operation time chart (2) of the synchronization command transmission section.

FIG. 40 is a diagram (1/2) showing an operation time chart (3) of the synchronization command transmission unit.

FIG. 41 is a diagram (2/2) showing the operation time chart (3) of the synchronization command transmission section.

FIG. 42 is a diagram (1/2) showing an operation time chart (4) of the synchronization command transmission section.

FIG. 43 is a diagram (2/2) showing the operation time chart (4) of the synchronization command transmitting section.

FIG. 44 is a diagram (1/2) showing an operation time chart (5) of the synchronization command transmission section.

FIG. 45 is a diagram (2/2) showing the operation time chart (5) of the synchronization command transmission section.

FIG. 46 is a diagram (1/2) showing an operation time chart (6) of the synchronization command transmission section.

FIG. 47 is a diagram (2/2) showing the operation time chart (6) of the synchronization command transmission section.

FIG. 48 is a diagram (1/2) showing an operation time chart (7) of the synchronization command transmitting section.

FIG. 49 is a diagram (2/2) showing the operation time chart (7) of the synchronization command transmission section.

FIG. 50 is a diagram (1/2) showing an operation time chart (1) of the timer control unit.

FIG. 51 is a diagram (2/2) showing an operation time chart (1) of the timer control section.

FIG. 52 is a diagram (1/2) showing an operation time chart (2) of the timer control unit.

FIG. 53 is a diagram (2/2) showing an operation time chart (2) of the timer control section.

FIG. 54 is a diagram (1/2) showing an operation time chart (3) of the timer control unit.

FIG. 55 is a diagram (2/2) showing an operation time chart (3) of the timer control section.

FIG. 56 is a diagram (1/2) showing an operation time chart (4) of the timer control section.

FIG. 57 is a diagram (2/2) illustrating an operation time chart (4) of the timer control unit.

FIG. 58 is a diagram (1/2) showing an operation time chart (5) of the timer control section.

FIG. 59 is a diagram (2/2) showing an operation time chart (5) of the timer control section.

FIG. 60 is a diagram showing an operation time chart (1) of the extension instruction command detection unit.

FIG. 61 is a diagram showing an operation time chart (2) of the extension instruction command detection unit.

FIG. 62 is a diagram showing an operation time chart (3) of the extension instruction command detection unit.

FIG. 63 is a diagram showing an operation time chart of the synchronization command detection unit.

FIG. 64 is a diagram (1/2) showing an operation time chart of the transmission data storage unit.

FIG. 65 is a diagram (2/2) showing the operation time chart of the transmission data storage unit.

FIG. 66 is a diagram showing a configuration of a remote monitoring control system.

FIG. 67 is a diagram showing a configuration of a conventional communication processing unit.

FIG. 68 is a diagram showing a processing flow (1) of the conventional communication processing unit.

FIG. 69 is a diagram showing a processing flow (2) of the conventional communication processing unit.

FIG. 70 is a diagram showing a system configuration of a conventional polling / selecting system to which the present invention is applied.

FIG. 71 is a diagram for explaining a normal operation in the conventional method, in which (a) shows a polling sequence;
(B) shows a time chart.

[Fig. 72] Fig. 72 is a diagram for explaining an operation in the case where the monitored station has a large amount of information in the conventional system, in which (a) shows a polling sequence and (b) shows a time chart.

[Fig. 73] Fig. 73 is a diagram for explaining an operation when a monitored station fails in the conventional system, in which (a) shows a polling sequence and (b) shows a time chart.

[Fig. 74] Fig. 74 is a diagram for explaining the operation in the case of a transmission line disconnection in the conventional system, in which (a) shows a polling sequence and (b) shows a time chart.

[Fig. 75] Fig. 75 is a diagram for explaining the operation of the conventional system in the case where the response processing of the monitored station is delayed, in which (a) shows a polling sequence and (b) shows a time chart.

[Fig. 76] Fig. 76 is a diagram explaining a normal time information collection time in the conventional method.

[Fig. 77] Fig. 77 is a diagram for describing information collection time when the monitored station has a large amount of information in the conventional method.

[Fig. 78] Fig. 78 is a diagram for describing information collection time when a monitored station fails in the conventional method.

[Fig. 79] Fig. 79 is a diagram for describing information collection time in the case of a transmission line disconnection in the conventional method.

[Fig. 80] Fig. 80 is a diagram for describing information collection time in the case where the response processing delay of the monitored station in the conventional method is delayed.

FIG. 81 is a diagram showing a specific example of a conventional transmission format and a command, where (a) is a transmission format and (b) is a diagram.
Shows a concrete example of a conventional polling command, and (c) shows a concrete example of a conventional response command.

FIG. 82 is a polling sequence (1) in the known example.
FIG.

FIG. 83 is a polling sequence (2) in the known example.
FIG.

FIG. 84 is a polling sequence (3) in the known example.
FIG.

[Explanation of symbols]

 23 Synchronous Command Sending Section 24 Extended Instruction Command Detecting Section 25 Synchronous Command Detecting Section 26 Transmission Data Storage Section 34 Timer 35 Destination Address Calculator 36 Timer Control Section 43 Memory 44 Memory

Claims (8)

[Claims] 1. A monitoring station sequentially calls a plurality of monitored stations, and each monitored station responds to the monitored station,
In a remote monitoring control system of the polling / selecting method in which the monitoring station collects information on each monitored station, the communication processing unit of the monitoring station sends a polling command specifying the polling destination to each monitored station at a fixed cycle. When the transmission of the polling command to each monitored station is detected by the synchronization command transmitting unit provided in the communication processing unit, the communication command is determined according to the destination address in the polling command. A polling method characterized by instructing the response from each monitored station by generating and sending a synchronization command with a destination address. 2. The synchronization command transmission unit is provided with a transmission destination address calculator so that the transmission destination of the synchronization command can be shifted to a transmission destination address of a monitored station that differs by a set amount. The polling method according to claim 1. 3. The polling method according to claim 1, further comprising: an extension instruction command detection unit for detecting an extension instruction command from the monitored station, the extension instruction command instructing extension of a response area of the monitored station, and In the synchronous command transmission unit, a timer control unit for controlling the set time of the timer that determines the period for transmitting the polling command is provided,
Sending a polling command for each monitored station by selecting from a value corresponding to the normal polling period set in the memory in the timer control section and a value determined according to an expansion instruction from the monitored station. A polling method characterized by making it possible to adjust the cycle of. 4. The polling system according to claim 1, further comprising: an extension instruction command detection unit that detects an extension instruction command from the monitored station, the extension instruction command instructing extension of the response area of the monitored station, and In the synchronous command transmission unit, a timer control unit for controlling the set time of the timer that determines the period for transmitting the polling command is provided,
A polling command for each monitored station is selected by selecting from a value corresponding to a normal polling cycle set in the memory in the timer control unit and a value determined according to an expansion instruction from the monitored station. A polling method characterized in that the sending cycle can be adjusted and a destination address calculator is provided to shift the destination of the synchronization command to the destination address of the monitored station that differs by a set amount. 5. The polling method according to claim 1, further comprising: an extension instruction command detection unit for detecting an extension instruction command from the monitored station, the extension instruction command instructing extension of a response area of the monitored station; In the synchronous command transmission unit, a timer control unit for controlling the set time of the timer that determines the period for transmitting the polling command is provided,
A value selected from a value set in the first memory in the timer control unit and corresponding to a normal polling period and a value determined according to a continuous extension instruction from the monitored station,
By selecting the value set according to the temporary expansion instruction from the monitored station set in the second memory,
A polling method characterized in that the polling command transmission cycle can be adjusted continuously or temporarily for each monitored station. 6. The polling method according to claim 1, further comprising: an extension instruction command detection unit for detecting an extension instruction command from the monitored station, the extension instruction command instructing extension of a response area of the monitored station; In the synchronous command transmission unit, a timer control unit for controlling the set time of the timer that determines the period for transmitting the polling command is provided,
A value selected from a value set in the first memory in the timer control unit and corresponding to a normal polling period and a value determined according to a continuous extension instruction from the monitored station,
By selecting the value set according to the temporary expansion instruction from the monitored station set in the second memory,
The polling command transmission cycle can be adjusted continuously or temporarily for each monitored station, and a destination address calculator is provided to send the synchronization command to a monitored station that differs in set amount. A polling method characterized by being able to shift to the destination address. 7. The monitoring station sequentially calls a plurality of monitored stations, and each monitored station responds to the monitored station,
In the remote monitoring control system of the polling / selecting method in which the monitoring station collects information of each monitored station, the communication processing unit of the monitored station detects the synchronization command addressed to itself from the monitoring station in the synchronization command detection unit. In this case, the polling method is characterized in that the information of the monitored station is sent to the monitoring station by a response command. 8. The polling according to claim 7,
A transmission data storage unit for storing response data to be transmitted is provided in the communication processing unit, and when a synchronization command addressed to the own station is detected, the information stored in the transmission data storage unit is transmitted by the response command. Characteristic polling method.