JPH066874A - Remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To improve the synchronization of a data processing by a polling control at the time of the abnormality of a polling response signal from a slave station device, and to eliminate the response delay of supervisory control information by providing a slave station supervisory counting control part in a master station device. CONSTITUTION:When the non-response and response signal failure of the polling response signal from the slave station device is occurred a slave station supervisory counting control part 18 judges the abnormality of the slave station device, updates the slave station supervisory counter of the pertinent slave station device, and outputs the starting signal of a polling command transmission update to a polling control part 16. The normalization of a transmission between the slave station device in which the abnormality of the polling response is generated and a master station device 10 is operated by the starting signal from the slave station supervisory counting control part 18 at every polling command transmission cycle. Thus, the transmission to the slave station device is operated in each fixed time, so that a polling cycle can be fixed. Therefore, a polling command transmitting period of time to the abnormal slave station can be shortened, and the entire polling cycle can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distant supervisory control apparatus which employs a polling transmission method for transmission processing of supervisory control information between a plurality of slave station apparatuses and a master station apparatus via a transmission path.

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing a system configuration concept in the present invention. The transmission of the supervisory control information is such that the control information and the supervisory information in the slave station devices 20-1 to 20-n are transmitted to the information transmitted from the master station device 10 to the corresponding slave station devices 20-1 to 20-n. Requested information (hereinafter referred to as polling command) and slave station device 20-1
20-n to the master station device, there is polling response information of the monitoring information in response to the polling command. In polling transmission, monitoring control information is transmitted to one slave station device 20-1 to 20-n by repeating polling command and response transmission.

The conventional master station device 10 and slave station device 20 will be described below with reference to FIGS. 4 and 5. The master station device 10 shown in FIG. 4 has an input processing unit 11 that performs an input process of control information MI, a transmission editing unit 12 that edits the input information and polling command information from the input processing unit 11, and the transmission editing unit 12 The transmitting unit 13 that receives the editing information from the slave station device 20-1 to 20 and transmits it to the transmission path.
-n receiving unit 14 for receiving the monitoring information, and the receiving unit 14
Reception information from the slave station device 20 corresponding to the polling command information is determined by the reception editing unit 15, and the response completion information from the reception editing unit 15 determines the next corresponding slave station. It comprises a polling control unit 16 for generating a polling command to the devices 20-1 to 20-n, and an output processing unit 17 for outputting monitoring information from the reception / editing unit 15. As shown in FIG. 5, the slave station device 20 receives a transmission information reception unit 21 from the master station device 10 and a polling response information transmission start signal when the received control information editing and polling command is directed to the self station. The reception information editing unit 22 that edits the start of collecting monitoring information, and the input processing unit 23-1 that performs input processing of monitoring information
~ 23-n, a monitoring information collecting unit 24 that collects information of the input processing units 23-1 to 23-n by a start signal from the reception information editing unit 22, and polling that edits the collected transmission information. It is composed of a response editing unit 25 and a transmission unit 26 that performs a transmission process to the master station device 10 by receiving the transmission start signal from the reception information editing unit 22 and the editing information from the polling response editing unit 25. .

FIG. 6 is a diagram showing a time chart of the polling transmission system. By receiving the polling commands P1 to Pn corresponding to the respective slave station devices 20-1 to 20-n on the polling command line 1 from the master station device 10, the corresponding slave station device
20-1 to 20-n indicate that the collection of monitoring information is started and the polling response information PR1 to PRn is transmitted to the master station device 10 via the slave station polling response line. FIG. 7 is a diagram showing a time chart of the conventional polling transmission system when there is no response of the polling response signal and when the response signal is defective.
When the polling response signal from the slave station device 20-1 responds to the polling command from the master station device 10 due to some cause, the polling response signal becomes no response or the response signal is defective, the master station device 10 waits for the polling response time. After (Tc) has elapsed, the polling command is sent again to the corresponding slave station device 20-1 a plurality of times to normalize the transmission between the master station and slave stations. The polling controller 16 of the master station device 10 sends a polling command n
If there is no normal response after the lapse of times, it indicates that the slave station device 20-1 determines that there is an abnormality and issues a polling command to the next slave station device 20-2.

[0005]

The master station device 10 receives monitoring information from the slave station devices 20-1 to 20-n according to a polling command, and at the same time monitors the status of the slave station devices 20-1 to 20-n. Are simultaneously performed by the corresponding polling response signals. When an abnormality occurs in the polling response signal from the slave station devices 20-1 to 20-n, the polling command is sent to the corresponding slave station multiple times to normalize the transmission between the master station and the slave station. Since it takes a long time to send the polling command to the slave station and the entire polling cycle cannot be speeded up, a response delay of the monitoring control information occurs, which causes troubles in the accident notification and the recovery operation of the power system and the like. Due to the response delay, the synchronization of data processing between the master station device 10 and the slave station devices 20-1 to 20-n cannot be achieved. This is because the polling response waiting time (Tc) shown in the time chart of FIG. 7 and the polling control of sending the polling command n times are present in the polling control unit 16 of the master station device 10.

The present invention has been made to solve the above problems, and improves the synchronization of data processing by polling control when the polling response signals from the slave station devices 20-1 to 20-n are abnormal. An object of the present invention is to provide a distant monitoring control device that eliminates the response delay of monitoring control information.

[0007]

According to the present invention, in a distant monitoring control device for transmitting monitoring control information between a master station device and a plurality of slave station devices by a polling transmission method, a polling command signal from the master station device is transmitted. When there is no response to the polling response signal from the slave station device to the transmission or when the response signal is defective, a means for updating the slave station monitoring counter of the corresponding slave station corresponding to multiple slave stations and multiple slave station devices 20-1 to 20-n Add means,
The master station device is provided with a slave station monitoring counting control unit to control the polling transmission procedure.

[0008]

[Function] The master station device 10 is a slave station device by the slave station monitoring counting control unit.
The polling control unit updates the polling response status from the counters 20-1 to 20-n, sends an activation signal to the polling control unit to update the polling command, and determine whether the slave station devices 20-1 to 20-n are abnormal. The polling control unit passes the polling command information to the transmitting unit 13 by the activation signal, and the slave station devices 20-1 to 20-
Send to 20-n.

[0009]

Embodiments will be described below with reference to the drawings. Figure 1
FIG. 2 is a configuration diagram of a master station showing an embodiment of a remote monitoring control device according to the present invention, and FIG. 2 is a diagram showing a time chart of a polling transmission system when there is no response to a polling response signal and when the response signal is defective. 1 and 2, the same parts as those in FIGS. 4 and 7 are designated by the same reference numerals, and the description thereof will be omitted. First, in FIG. 1, 18 is a slave station device 20-1 to 20.
-n to update the polling response status monitoring counter, determine the abnormality of the slave station devices 20-1 to 20-n, and send a polling command transmission update start signal to the polling control unit 16 to the polling control unit. Is. As shown in the time chart of FIG. 2, when the slave station device 20-1 does not respond to the polling response signal and the response signal is defective, the reception completion signal from the reception editing section 15 is received by the slave station monitoring / counting control section 18. The slave station device 20-1 is judged to be abnormal by
The counter of -1 is updated, and a polling command transmission update start signal is output to the polling control unit 16. The normalization of the transmission between the master station devices 10 of the slave station device 20-1 in which the polling response abnormality has occurred is performed by the activation signal from the slave station monitoring / counting control 18 in each polling command transmission cycle. Other configurations are the same as those in FIG.

Next, a series of operations will be described. Figure 2
When the polling response from the slave station devices 20-1 to 20-n is no response and the response signal is defective as shown in Fig. 5, the status of the slave station devices 20-1 to 20-n is monitored by counting the corresponding slave station monitoring counter. The slave station devices 20-1 to 20-n are provided by giving a polling command transmission update start signal to the polling control unit 16.
Since the transmission is performed every fixed time (Td), the polling cycle can be fixed. The slave station abnormality detection can also be detected when the slave station monitoring counter value reaches an arbitrarily designated value.

As described above, the slave station devices 20-1 to 20-n
Even if the polling response signal from the device becomes abnormal, the slave station monitoring / counting control unit 18 is provided in the master station device 10 to reduce the polling command transmission time to the abnormal slave station and shorten the entire polling cycle. As a result, the response delay of the supervisory control information is minimized, which is effective for reporting accidents and restoration operations in the electric power system.

As another embodiment, a no-response detection timer and a response signal reception completion detection for controlling the frequency of sending a polling command to a slave station when the slave station monitoring / counting control unit 18 of the master station device 10 has an abnormality in a polling response signal. Means for controlling the polling command transmission to the polling control unit 16 so that the polling response signal is abnormal.
-It is possible to perform the polling command for each cycle instead of sending the polling command for each cycle, so that the monitoring information data collection and slave station devices 20-1 through 20
-It is possible to monitor the status of n.

[0013]

As described above, according to the present invention, in order to eliminate the response delay of the monitoring control information in the polling command from the master station device when the slave station device is abnormal, the slave station monitor counting control is performed in the master station device. By providing the unit, it is possible to provide a remote monitoring control device capable of improving the synchronism of data processing between the master station device and the slave station device and improving the responsiveness of the monitoring control information.

[Brief description of drawings]

FIG. 1 is a block diagram of a master station of an embodiment of a remote monitoring and control apparatus according to the present invention.

FIG. 2 is a time chart showing a polling method according to the present invention.

FIG. 3 is a diagram showing a system configuration.

FIG. 4 is a configuration diagram showing a master station of a conventional remote monitoring control device.

FIG. 5 is a configuration diagram showing a slave station of a conventional distant monitoring control apparatus.

FIG. 6 is a time chart for a normal response in the conventional polling transmission method.

FIG. 7 is a time chart when there is no response in the conventional polling transmission method.

[Explanation of symbols]

 10 ... Master station device 11 ... Input processing unit 12 ... Transmission editing unit 13 ... Transmission unit 14 ... Reception unit 15 ... Reception editing unit 16 ... Polling control unit 17 ... Output processing unit 18 ... Slave station monitoring counting control unit

Claims (1)

[Claims] 1. In a distant monitoring control apparatus for transmitting monitoring control information between a master station apparatus and a plurality of slave station apparatuses by a polling transmission method, a slave station apparatus responds to a polling command signal transmitted from the master station apparatus. When there is no response to the polling response signal or when the response signal is defective, means for updating the slave station monitoring counter of the corresponding slave station corresponding to the plurality of slave stations, means for determining abnormality in the multiple slave station devices, and a slave station monitoring counting control unit for the master station device A remote monitoring and control device which is provided with a control unit to control the polling transmission procedure.