DK155400B - PROCEDURE FOR MONITORING WIRES CONNECTING MORE STATIONS IN THE REMOTE CONTROL MACHINE - Google Patents

Description

DK 155400 B

The invention relates to a method of monitoring wires connecting multiple stations in the remote control mask as defined in the preamble of claim 1.

5 German Publication No. 27 53 093 discloses a remote monitoring system for several stations and the interconnecting stations in the remote control mask, where each wire between two stations is monitored in both directions at two different levels by transmitters and receivers.

This remote monitoring system has the disadvantage of necessitating a considerable supply to the control signal transmitters and control signal receivers and to the devices which input the conduction failure messages into the mask network.

German patent specification 20 48 098 discloses a device which, for the purpose of maintaining the operation, switches information transmission channels to cyclically invoked remote control devices in a species 20 mesh network, however, where the "masks" are not terminated and the central station over a switch after each cycle of the cycle. cyclically switches to another of several four-wire lines, which are connected to the remote control network over each path, over which the stations are invoked in a fixed order for delivery of messages. It is a disadvantage here that the network configuration must not exceed a certain complexity, which is determined by the fact that the switchboard must belong to each netmask and that a closed mask is not allowed if all wires can be monitored.

The invention therefore aims to provide a method of the kind initially provided for monitoring wires connecting multiple stations useful in any complex power supply network and requiring substantially less supply than the known methods.

2

DK 155400 B

This task is solved by the measures specified in claim 1.

With the invention, it is achieved that with a small supply, for example without special control transmitters and receivers, one can quickly and safely monitor any arbitrarily complex network with respect to wiring malfunctions, which is that after a cycle, ie. When telegrams are sent over all outgoing wires, information about the wiring condition for the entire network 10 is available in the switchboard or switches.

Advantageous developments of the invention are evident from the dependent claims, where in the case of many stations a central intelligence is preferred, while a distributed intelligence is more appropriate in the case of 15 few stations.

As the telegram transmitted by the station contains the address of the selected wiring, the consumption of the central station is reduced.

In general, it is an advantage that the control process 20 for monitoring the wires of the method according to the invention is not to be effected unconditionally by means of separate grids separate from the usual telephone traffic, but any normal message or order grams produced in a station can, in particular in cyclic remote control systems, are used for conduction monitoring according to the invention. However, even in spontaneous systems, which usually carry out general inquiries at all network stations at certain times, the conduit monitoring according to the invention can be advantageously and without any major additional consumption and without any additional congestive traffic combined with the general inquiry.

The invention is explained in more detail below with reference to the drawing. The drawing shows a 35 multi-mesh remote control network with stations S1-S4, all connected to each other over lines 1 ... 6,

DK 155400 B

ISLAND

s / each terminating in a branching device V. In an embodiment according to the invention, a first substation, for example station S2, is now caused to send a telegram 5 targeted over a selected line in the outgoing direction, for example the line 1. The other wires 2 and 3 connected at this station to the branching device V are blocked in the outgoing direction. If the telegram is received correctly at any location in the mesh network, 10 mostly in a central station, such as the station S1, the line 1 must be in the outgoing direction. Then, line 2 is selected and correspondingly lines 1 and 3 are blocked in the outgoing direction.

If a telegram is again sent from the substation S2 15 and received correctly at the central station SI, the line 2 must be in the outgoing direction. The transmission path then runs over the wires 2.6 or 2.4.5. Conveniently, this method is used for each outgoing line and for all stations of the network. Thus, all the wiring of the mesh network can be checked in the outgoing and thus also in the coming direction.

The method according to the invention can similarly be used for two-wire or four-wire lines.

25 Conveniently, the control procedure is performed so that the control process is controlled from the central station. By means of a control command, the central station announces the substation over which line the response telegram is to be delivered. If no response telegram is received at the central station within a certain period of time, the control command can be repeated. If, after several repetitions, no telegram is received, the cord in that outgoing direction is marked as defective. Then the next line is selected with an additional control command. If over all wires connected to the substation,

DK 155400 B

If no answer telegram is received, it is very likely that the substation in question is defective.

However, the invention is by no means limited to telegrams transmitted in space multiplex operation. For example, the telegrams may also be transmitted in time multiplex or in code multiplex, where, in the first case, certain times in a raster are associated with a particular station and one of its departing directions, respectively, the outgoing direction of one of its lines. GER. In the second case, the advantage is obtained that at the same time several telegrams are sent from a station where the telegram is coded in dependence on the outgoing line or direction respectively. For example, the speed can also be determined depending on the outgoing line and direction respectively. With such measures which, in certain circumstances, necessitate a multi-decoder at the central station, it can be achieved that a picture of the network state of the network in the central station very quickly exists. This advantage is also obtained if the telegrams are transmitted in frequency multiplex.

For the invention, it is irrelevant whether the stations connecting wires are wire or radio connections. According to the invention, there is advantageously in the central station a microprocessor, but microprocessors can also be found in the substations if the stations without special control command by the central station automatically or, for example, after a general query command gives their message telegrams in stable time operation. The outgoing lines and directions may be used in a fixed order and / or the telegrams may each contain the address of the used outgoing line and direction, respectively.

Claims (1)

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