JPH0818572A - Terminal equipment address revision method for remote supervisory control - Google Patents

Abstract

PURPOSE:To facilitate maintenance management by receiving a reply from a revision object slave station in the standby state, sending an address revision command from a master station to each slave station, revising a terminal address of the revision object slave station into a new address and allowing the slave station of revision object to reply an end of revision to the master station. CONSTITUTION:A slave station 6 in the address revision standby state sends the same reply as an address revision notice to a master station 1 via an incoming signal line and a relay line 3 in a communication cable 4. The master station 1 receiving the reply sends an address revision command using an idle terminal equipment address to each slave station 6 via an outgoing signal line of the communication cable 4 and the relay line 3. The address revision instruction uses an idle terminal address for an address code and a new code such as '5' is informed to a concerned slave station 6. Thus, the concerned slave station 6 receives the new address code 5 in place of an old code such s '2' and uses the communication line 4 and the incoming communication line of the relay line 3 to confirm the revision in the address of the master set 1 to terminate the processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for changing the address of a terminal for remote monitoring control of a polling communication system for power transmission and distribution equipment.

[0002]

2. Description of the Related Art Conventionally, a supervisory control of a switch such as a section switch of a power transmission and distribution facility is carried out by using a distant supervisory control device of a 1: N polling communication system.

This remote monitoring and control apparatus is constructed substantially as shown in FIG. 2 of one embodiment of the present invention, and a communication cable 2 is attached to a master station 1 provided at a manned monitoring station such as a sales office of a power company.
A relay station (site master station) 3 such as a substation on the downstream side is connected to the slave station 6 of each section switch 5 via a communication cable 4.

Each section switch 5 is a circuit breaker 7 in a substation.
It is provided so as to divide the distribution line 8 drawn from the.
In addition, each slave station 6 uses a microcomputer or the like as shown in FIG.
And is connected to the communication cable 4 via the slave station connector 9 and the communication connector 10, and is connected to the power switch side (substation side) of the division switch 5 of its own station, the control transformer 11 on the load side, The system power supply via 12 supplies power to the AC / DC power supply unit 13.

Based on this power supply, the power supply unit 13 is provided with a computer-configured logic unit 14, a switch control unit 15, and a communication unit 1.
6, driving DC power is supplied to each part of the slave station 6 such as the address storage part 17. On the other hand, a plurality of communication cables 18 and 19 similar to the communication cable 4 are provided on the load side (downstream side) of the relay station 3.
Are branched and connected.

Each slave station 6 has, for example, all the slave stations on the load side of the relay station 3 as one group, and a unique terminal address which is different for each slave station is set. Holds the terminal address. The address storage unit 17 is formed of, for example, a nonvolatile semiconductor memory, and the terminal address is rewritably written therein.

Further, based on the setting of the terminal address of each slave station 6, the master station 1 sends a calling signal of polling communication to which the terminal address of each slave station 6 is added via the relay station 3 to the communication cable 4. The signals are transmitted to the down signal lines 18 and 19 and the respective slave stations 6 are sequentially called.

Each slave station 6 receives the calling signal of the communication cable 4 by the communication section 16 through the connectors 10 and 9, and the received terminal address matches the terminal address of its own station in the storage section 17. Whether or not it is determined by the logic unit 14.

When the call of its own station in which the addresses of both the terminals match is detected by this determination, the logic unit 14 determines the switch control unit 15 based on the monitoring and control commands included in the call signal.
The section switch 5 of its own station is monitored and controlled via the.

The communication unit 16 is controlled by the logic unit 14.
Sends a reply with the terminal address of its own station to the upstream signal line of the communication cable 4, and sends a reply to the call to the master station 1. Then, by exchanging information of polling communication between the master station 1 and each slave station 6 via the communication cable 4,
Each section switch 5 is monitored and controlled.

Information exchange between the master station 1 and each slave station 6 is carried out, for example, in the signal format shown in FIG. In FIG. 4, a is a leading sync area for storing a predetermined sync signal, b is an address area for storing the terminal address of each slave station 6, and c is a tail command / data area for storing various commands. is there.

If the terminal address of each slave station 6 is, for example, an 8-bit address 1, an address 2, ..., These addresses are any of the decimal numbers “1” to “254”. When calling each slave station 6 and returning from each slave station 6, the terminal address of each slave station 6 is written in the address area B.

Next, the terminal address of each slave station 6 is conventionally changed by using the portable slave station checker 20 shown in FIG. That is, when changing the terminal address of any of the child stations 6, the worker carries the child station checker 20 and goes to the installation site of the child station to be changed, for example, the child station 6 of the terminal address "2".

The slave station connector 9 of the slave station 6 to be changed
And the communication connector 10 are separated from each other, and the change target slave station 6 is separated from the communication cable 4. Then, the checker connector 21 of the slave station checker 20 is connected to the slave station connector 9, and the slave station checker 20 is changed to the change target slave station 6. Connecting.

Then, while confirming the in-operation display on the display section 22 of the slave station checker 20, the respective operation switches (operation keys) 23 of the slave station checker 20 are operated, and the terminal address, for example, the present address, is set in the procedure shown in FIG. Change from "2" to "5". In this case, first, the slave station checker 20 transmits the first address change command in (i) of FIG. 5 to the slave station 6 to be changed.

This address change instruction is an address change instruction code of "00" corresponding to an unused unused terminal address "0" based on a communication command agreement and the like, and this code is written in the address area B. It is formed by writing a new address "5" which is changed when it is inserted into the command / data area C.

Upon receiving the first address change command, the change target slave station 6 discriminates the address change from the instruction code of the address area B received by the logic unit 14, and waits for the rewritable address change in the storage unit 17. At the same time, the first reply as the response of (ii) in FIG. 5 is transmitted to the slave station checker 18.

In this first reply, the address of the command / data area C of the received first address change command is changed to the current terminal address "2" of the change target slave station 6 held in the storage unit 17. It becomes a signal.

Further, the slave station checker 20 having received the first reply executes the change of the terminal address,
The second address change command shown in (iii) of FIG. 5 is transmitted to the change target slave station 6. This second address change command is
This is the same signal as the first address change instruction.

The slave station 6 to be changed, which has received the address change command in the address change waiting state, receives the terminal address of the storage unit 17 by the logic unit 14 and receives the new address of the command / data area C of the address change command. Rewrite to "5" and change the terminal address of the own station from "2" to "5".

Further, when this modification is completed, the slave station 6 to be modified is released from the address modification waiting state, and as shown in FIG.
(Iv) The second reply as the change completion energization is transmitted to the slave station checker 20. This reply has the changed terminal address "5" in the command / data area C and becomes the same signal as the address change command.

Upon receipt of the second reply, the address change process of the slave station checker 20 is completed, and the worker disconnects the slave station connector 9 from the checker connector 21 and connects it to the communication connector 10 to be changed. The slave station 6 is connected to the communication cable 4 again.

[0023]

In the case of the conventional method of changing the terminal address of the remote monitoring control, the slave station 6 to be changed is disconnected from the communication cable 4, and the slave station checker 20 is connected to the slave station 6 to be changed. Since the checker 20 is used to change the terminal address of the change target slave station 6, each time the operator changes the terminal address of each slave station 6, the worker checks the slave station checker 2
It is necessary to carry 0 to go to the site and reconnect connectors, which requires a great deal of labor and the like, and there is a problem that maintenance and management thereof cannot be easily performed. An object of the present invention is to enable a master station to change a terminal address of each slave station without using a slave station checker or the like.

[0024]

In order to achieve the above object, in the method of changing a terminal address for remote monitoring control of the present invention, the current slave station to be changed from the master station to each slave station via a communication cable. Send an address change notification with the old device address added as the old address, and based on the match between the old address of the communication cable and the own device's terminal address, set the change target slave station to the address change standby and change it. The slave station returns a reception response to the master station via the communication cable, and based on the reception of this reply, the master station transmits an address change command with a new address added to each slave station via the communication cable. Based on the reception of the address change command in the address change standby, the terminal address of the change target slave station is changed to the new address and the change target slave station via the communication cable. It returns the completion of the change to the master station.

[0025]

In the remote monitoring control terminal address changing method of the present invention configured as described above, when changing the terminal address of any of the slave stations, the address is sent from the master station to each slave station via the communication cable. A change notification is transmitted, and only the slave stations to be changed are set to the address change standby by this change notification.

Further, after the reply from the modification target slave station in the address modification standby state, the master station transmits an address modification command to each slave station via the communication cable. At this time,
Only the change target slave station in the address change standby changes the terminal address of its own station to the new address of the address change instruction based on the address change instruction.

After the change, the change target slave station returns a change completion message to the master station via the communication cable, and the change of the terminal address is completed. Therefore, the master station can change the terminal address of each slave station via the communication cable.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described with reference to FIGS. In the case of changing the terminal address of each slave station 6 of the distant monitoring control apparatus of FIG.

When the terminal address of the slave station 6 having the terminal address "2" is changed to "5", each slave station from the master station 1 through the relay station 3 and the down signal line of the communication cable 4 is used. 6, the address change notification shown in (i) of FIG. 1 is transmitted. This address change notification is set in the same format as the signal format of FIG. 4 used for normal information exchange between the master station 1 and each slave station 6.

Further, the first vacant terminal address "0", which has been conventionally used as an address change instruction code, is used as an address change notification code, and the address area B corresponds to the terminal address "0". Code to "0
"0" is written as an address change notification code, and the current terminal address "2" of the change target slave station 6 is written in the command / data area C as the old address.

Then, each slave station 6 which has received the address change notice determines that the address change notice is the address change notice from the instruction code of "00" in the address area B by the logic unit 14, and then the terminal in the command / data area C The address is compared with the current terminal address of the local station in the storage unit 17 to determine whether or not the notification is for the local station.

Based on this determination, only the change target slave station 6 having the same address of both terminals shifts to the rewritable address change standby of the storage unit 17 by the logic unit 14 and the same as the address change notification of FIG. The reply (ii) is transmitted to the master station 1 through the up signal line of the communication cable 4 and the relay station 3. When this reply is received, each slave station 6 is transmitted from the master station 1 through the relay station 3 and the down signal line of the communication cable 4.
The address change command shown in (iii) of FIG. 1 is transmitted to.

This address change command uses the second empty terminal address "255" as an address change command code, this code is written in the address area B, and the new address "5" to be changed is commanded. -It is written in the data area c and is formed. Then, each slave station 6 that has received the address change command determines that the logical unit 14 is an address change command from the instruction code of "255" in the address area B, and the slave stations to be changed which are in the address change standby state. Only 6 executes the change of the terminal address based on this command.

That is, the slave station 6 to be changed, which has shifted to the address change standby, writes the new address "5" of the command / data area C of the address change instruction received by the logic section 14 into the storage section 17, Change the terminal address from "2" to "5". Then, after this change, the change completion slave shown in (iv) of FIG. 1 is transmitted from the change target slave station 6 to the master station 1 through the upstream signal line of the communication cable 4 and the relay station 3.

This reply is the same signal as the address change command, and upon receipt of this reply, the master station 1 confirms the change of the terminal address and terminates its processing. It is needless to say that the logic unit 14 of the master station 1 and each slave station 6 is set with a processing program for performing the address changing process in the procedure of (i) to (iv) of FIG.

Since the master station 1 can change the terminal address of each slave station 6 via the communication cable 4, the work using the conventional slave station checker 20 becomes unnecessary, and the worker goes to the site. It is not necessary to reconnect the connectors, and the terminal address of each slave station 6 can be changed easily and quickly, and the maintenance and management thereof can be significantly simplified.

By the way, in the above-mentioned embodiment, the present invention is applied to the change of the remote monitoring control terminal address of the power transmission and distribution equipment provided with the slave station 6 for each division switch 5. However, the remote monitoring control terminal address of various equipment is applied. Of course, it can be applied to the change of.
The configurations of the master station 1 and each slave station 6 are not limited to the embodiments.

[0038]

Since the present invention is configured as described above, it has the following effects. An address change notification is sent from the master station to each slave station via the communication cable, and only the slave stations to be changed are set to the address change standby by this change notification, and a reply is sent from the slave stations to be changed in the address change standby state. Later, the master station sends an address change command to each slave station via the communication cable, changes only the terminal address of the slave station to be changed to a new address based on the address change command, and after this change the slave station to be changed Returns the change completion to the master station via the communication cable and ends the change of the terminal address. Therefore, the master station can change the terminal address of each slave station via the communication cable, and the maintenance and management thereof can be easily performed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of one embodiment of the present invention.

FIG. 2 is a block connection diagram of an embodiment of the present invention.

3 is a detailed block connection diagram of a part of FIG. 2. FIG.

FIG. 4 is an explanatory diagram of a signal format of information exchanged between a master station and each slave station.

FIG. 5 is an explanatory diagram of a conventional method.

[Explanation of symbols]

 1 Master station 4 Communication cable 6 Slave station

Claims (1)

[Claims] 1. A method of changing a terminal address of remote monitoring control for changing the terminal address set for each remote station of remote monitoring control by sequentially calling each slave station from a master station by polling communication and exchanging information. In the above, the master station transmits an address change notification in which the current terminal address of the modification target slave station is added as an old address to each of the slave stations via the communication cable, and the old address of the communication cable and the own station. Based on a match with the terminal address of the change target slave station, the change target slave station is set to the address change standby, and a reply is returned from the change target slave station to the master station via the communication cable, and the reply is received. Based on the above, the master station transmits an address change command with a new address to be changed to each of the slave stations via the communication cable, and waits for the address change. Based on the reception of the address change command, the terminal address of the change target slave station is changed to the new address, and the change completion slave station returns a change completion message to the master station via the communication cable. How to change the terminal address for remote monitoring control.