JPH0440919B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a 1:N type distribution line automation device in which one master station monitors and controls one slave station.

[Conventional technology]

Figure 4 shows, for example, the conventional 1:N type remote monitoring and control device shown in the materials of the lecture "Practical status of power distribution automation systems in electric power companies and future implementation promotion measures" held at Kikai Shinko Kaikan. 1 is a block diagram showing a system diagram of a distribution line automation system, in which 1 is a master station, 211 to 21n are transmission lines 3;
Slave stations 221 to 2 connected to master station 1 via 1
2n is a slave station connected to the master station 1 via the transmission line 32, and 2m1 to 2mn are connected to the master station 1 via the transmission line 3m.
It is a slave station connected to.

FIG. 5 shows the configuration of the transmission format used for this. In the figure, 4 is a transmission code consisting of a slave station address section 41 and a data section 42.

FIG. 6 is a block diagram showing the corresponding parts of the slave station address creation and decoding unit for a master station and one slave station. In the figure, 11 is a man-machine interface, and 12 is a logic unit that creates codes. , these are provided in the master station 1.

Also, 201 converts the serial code to parallel code.
SP converter, 202 is a slave station address setting switch for setting the slave station address, 203 is SP converter 2
This is a comparator that compares the output of 01 with the address set by the slave station address setting switch 202 and outputs an address match signal 204 when they match, and these are provided in the slave station.

Next, the operation will be explained using FIGS. 4 to 6. When controlling the slave station 211 from the master station 1, the master station 1 uses the transmission line 31 to which the slave station 211 is connected.
On the other hand, in order to identify the slave station 211 and other slave stations, the transmission code 4 containing the slave station address representing the slave station 211 in the slave station address field 41 is transmitted. If the slave station address part 41 of the received transmission code 4 is the address of the slave station 211, the slave station 211 executes the control indicated in the data part 42.

That is, when the operator of the master station 1 operates the man-machine interface 11 to control the slave station 211, the logic unit 12 creates a corresponding transmission code 4 and transmits it to the transmission line 31.

The SP converter 201 of the slave station 211 receives the transmission code 4, performs serial conversion, and outputs it to the comparator 203. This comparator 203 compares the output of the SP converter 201 with the slave station address setting switch 202, which has previously set the slave station address assigned to the slave station, and outputs an address match signal 204 if they match.

This address match signal 204 causes the slave station 21
1 knows that it has been selected by master station 1, and executes the control indicated by data 42 on transmission code 4.

The slave station address is set by the operator of master station 1 as man-machine 1.
1 and setting the slave station address setting switch 202 on the slave station 211. Normally, all slave stations are not serially numbered from 1 to n, but the slave station address is set to a number that improves operability. It has a certain meaning (for example, the telephone pole number on which a slave station is attached) and has considerable redundancy.

[Problem that the invention seeks to solve]

Since conventional distribution line automation equipment is configured as described above, the number of bits in the slave station address part is larger than necessary, and the transmission time to transmit it is long, resulting in a slow response time for control. There were also problems such as increased response time for monitoring.

This invention was made to solve the above problems, and by reducing the number of bits required for the slave station address on the transmission path, it is possible to shorten the control response time and the monitoring response time. The purpose is to obtain distribution line automation equipment.

[Means for solving problems]

The distribution line automation device according to the present invention separates the slave station address for identifying the slave station and the address used on the transmission path, and converts the slave station address and the address on the transmission path at the master station and the slave station respectively. This is what I decided to do.

[Effect]

The distribution line automation device of the present invention separates the slave station address and the address on the transmission path, and converts the slave station address and the address on the transmission path at the master station and the slave station, respectively. The number of bits is reduced, the transmission time is shortened, and the control response time and monitoring response time are shortened.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. The hardware configuration shown in FIG. 1 is the same as the hardware configuration of the conventional remote monitoring and control device shown in FIG. 4.

Figure 2 shows the configuration of the transmission format used for this purpose. Short address download code for transmission to, 5
1 is a common address that instructs all slave stations to receive, 52 is a shortened address section in which the number of information bits is reduced by converting the slave station address, and 41 is a slave station address section. 6 is a transmission code based on the shortened address, 4
2 is a data section.

FIG. 3 is a block diagram showing the corresponding parts of a slave station address creation and decoding unit for a master station and one slave station. In the figure, 11 is a man-machine interface, 12 is a logic unit that creates codes, and 13 is an address part conversion table for slave station addresses and abbreviated addresses, which are provided in the master station 1.

201 is an SP converter that converts a serial code into a parallel code, 202 is a slave station address setting switch that sets a slave station address, and 203 is a shortened address 2 from the output of the SP converter and the shortened address latch circuit described later.
10 and when they match, address match signal 20
205 is a common address detector that detects the common address, 206 is a slave station address comparator that compares the output of the SP converter and the slave station address setting switch 202, and 207 is the output of the common address detector. and the output of the slave station address comparator.
An AND circuit 209 performs an AND operation and outputs a shortened address latch signal 208, and 209 is a shortened address latch circuit that latches the shortened address 210 using the shortened address latch signal 208. These circuits are provided in the slave station.

Next, the operation will be explained using FIGS. 1 to 3. First, in Figure 1, when this system starts operating, the master station has registered all the slave station addresses of the slave stations that should communicate, so these slave station addresses are divided for each transmission path and the same Serial numbers from 1 to n are assigned to slave station addresses within the transmission path. The serial number assigned in this way is called a shortened address. This conversion table between the shortened address and the slave station address is stored in the address conversion table 13.

Next, the logic unit 12 transmits the contents of the address conversion table 13 to the corresponding transmission line 31 for all slave stations connected to the transmission line using the shortened address download code 5.

In the slave station 211, the slave station address comparator 206 compares the output of the SP converter 201 with the contents of the slave station setting switch, and if they match, outputs the output to the AND circuit 207.

On the other hand, when the common address detector 205 detects a common address, it is output to the AND circuit 207. When the AND circuit 207
A shortened address latch signal 208 is output. When the shortened address latch circuit 209 receives the shortened address latch signal 208, it takes in the shortened address on the shortened address download code 5 and latches it. Perform the same operation for all slave stations,
Complete initial operations.

After the initial operation is completed, when the master station 1 controls the slave station 211, the master station 1 transmits the transmission code 6 to the transmission line 31 to which the slave station 211 is connected.

At this time, the abbreviated address assigned to the slave station 211 is entered into the abbreviated address field 52 in order to identify the slave station 211 and other slave stations. Transmission code 6 in slave station 211
If the abbreviated address section 52 of is the abbreviated address set at the time of initial operation, control is executed according to the contents of the data section 42.

That is, when the operator of the master station 1 operates the man-machine interface 11 and inputs the slave station address of the slave station 211, the logic unit 12 refers to the address conversion table 13 and determines the address corresponding to this slave station address 211. A shortened address is added, and the transmission code 6 is transmitted to the transmission line 31 to which the slave station 211 is connected.

The SP converter 201 of the slave station 211 receives this transmission code 6, performs serial-to-parallel conversion, and outputs it to the comparator 203. The comparator 203 receives the shortened address 210 output from the shortened address latch circuit 209.
and the shortened address 52 of the transmission code 6,
If they match, an address match signal 204 is output.

This address match signal 204 causes the slave station 21
1 learns that it has been selected by the master station 1 and executes the control indicated in the data section 42 on the transmission code 6.
The shortened address 52 only needs to be able to identify slave stations connected to the same transmission path, and may have fewer bits than the slave station address.

Note that although the above embodiments have been described with reference to the case where control is performed from the master station, similar effects can be achieved in the case of monitoring using a polling method.

〔Effect of the invention〕

As described above, according to the present invention, the slave station address for identifying the slave station has redundancy in consideration of operability as before, and the address on the transmission path is separate from the slave station address. Since the conversion is performed between the master station and the slave station, the operability remains the same as before, and the transmission time is shortened, resulting in the effect that the control response time and the monitoring response time are shortened.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a distribution line automation device according to an embodiment of the present invention, FIG. 2 is a transmission format diagram used in the device, and FIG.
Fig. 4 is a block diagram showing a conventional distribution line automation device, Fig. 5 is a transmission format diagram used in the conventional device, and Fig. 6 is an internal configuration diagram of the device's master station and one slave station. is an internal configuration diagram of a master station and one slave station of a conventional device. 1 is the master station, 13 is the address conversion table, 211-2
mn is a slave station, 202 is a slave station address setting switch,
203 is a comparator, 205 is a common address detector,
206 is a slave station address comparator, 209 is a shortened address latch circuit, 31 to 3m are transmission lines, 41 is a slave station address section, 42 is a data section, 5 is a shortened address download code, 51 is a common address, 52
is an abbreviated address part, and 6 is a transmission code. In the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. In a distribution line automation system in which one master station monitors and controls one or more slave stations, the abbreviation assigned to the slave station address on the same transmission path as the slave station address for identifying each slave station. a common address detector comprising an address conversion table in the master station that stores an address conversion table, and detecting a common address of a shortened address download code transmitted from the master station;
a slave station address comparator that compares the slave station address of the shortened address download code and a slave station address setting switch; and a slave station address comparator that compares the slave station address of the shortened address download code with a slave station address setting switch, and a shortened address of the shortened address download code based on the output of the common address and the output of the slave station address comparator. and a comparator that compares the shortened address of the transmission code transmitted from the master station with the shortened address latched in the shortened address latch circuit. Distribution line automation equipment.