JPH0468796A - Installation changeover system for remote monitor control system - Google Patents

Abstract

PURPOSE:To attain monitoring by both master stations and verification of a new installation while the system operation is continued by applying series connection, or branch connection or series branch switching connection to the master station of an existing installation and the master station of a new installation. CONSTITUTION:A changeover switch SW41 of a changeover section 4A is provided to an outgoing transmission line only in a transmission line between a master station 11 and a slave station 21 of an existing installation 7, and the switch SW41 is used to apply direct connection to the master station 11 and the slave station 21 or inserts a master station 61 of a new installation 5 in series. Similarly, a changeover switch SW42 switches the direct connection of a master station 12 and a slave station 25 or series insertion of a master station 62. Thus, even in the transient state of changeover from the existing installation 7 to the new installation 5, the new installation 5 monitors and verifies the function of the master station 61 while the existing installation operates the system.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a remote monitoring and control system with a fluid group configuration.
In particular, it relates to a switching method for equipment on the control center side.

B1 Overview of the Invention The present invention provides a system for connecting the master station of the current equipment and the master station of the new equipment to slave stations in series, one branch connection, or in series/branch switching connection when switching from current equipment to new equipment in a control center. By doing this, it is possible to reliably and easily switch from current equipment to new equipment while ensuring system operation status.

C0 Prior Art FIG. 4 shows an example of a line configuration of a remote monitoring and control system having a floating group configuration. (A) in the figure shows the normal state of the line. Eight slave stations 2 and 28 are connected to three master stations II to 13 in three groups 01 to G3, that is, loop lines 31 to 33, respectively.
It belongs to and is coupled to one master station 11-13. Loop line 3
1 to 33, the transmitted and received data is circulated in one direction (indicated by the arrow), and the slave stations 23 and 26 are operated in terminal mode belonging to both loop lines, and the slave stations 211 except for these slave stations are
22. 2a.

26.2? , 2° are operated in relay mode.

Also, in the terminal mode, the one that communicates with the master station is called the wooden horse, and the one that does not communicate with the master station is called the subordinate. Similarly, in the relay mode, the system that communicates with the master station is called the main system, and the system that does not communicate with the master station is called the slave system.

In such a configuration, when a line abnormality such as line disconnection occurs, the communication function for all the slave stations is restored by changing the affiliation of the slave stations to each of the loop lines 31 to 33.

FIG. 4(B) shows a state in which the line configuration is being modified due to the occurrence of a line abnormality between the slave stations 21 and 28. and 22 change from the relay mode to the terminal mode to separate the abnormal line section from the normal circuit. But now.

Until now, the slave station 22 has not been connected to any master station, so there is no communication function for the slave station 22. FIG. 4(C) shows an example of the line configuration state after the communication function is restored. FIG. 2C shows a recovery line configuration when it is determined that there is an abnormality in the line between the slave stations 21 and 22, where the slave station 21 is connected to the loop line 3. The slave stations 22 and 23 are attached to the master station 12 via the loop line 32.

Main station 1. ~1. is centrally located in one location as control center equipment, and the system operating status, etc. is monitored through a man-machine interface.

When switching control center equipment to new equipment, it is required to switch to the new equipment while maintaining the system operation status of the current equipment, and the conventional switching method is to perform group-based switching as shown in Figure 5. The switching is done sequentially. In the same figure,
Master station II~1s and slave station 2. .

2+ 2+1+ Switch SW for connection with 2m
1 to S W s are provided, and a master station 6. of the new equipment 5 is provided.
~63 and the master stations 11 to 13 of the current equipment 7 with switch SW1
-Migration to new equipment 5 is performed by sequentially switching and verifying SW3. 8.9 is the man-machine interface for current equipment and new equipment.

D1 Problems to be Solved by the Invention In the conventional switching system, the new equipment 5 is often installed in a remote location such as in a different building from the current equipment 7. In this case, the following problem occurred during the switching by the switching unit 4, for example, when only the switch SW1 was switched to the new equipment 5 side.

(1) On the current equipment 7 side, the slave station 2 is connected to the master station 1. On the new equipment 5 side, the operating status through the master station 12°1 cannot be determined. In such a situation, if a line abnormality occurs, the above-mentioned group configuration change processing cannot be executed on both the current equipment 7 and the new equipment 5, and the operators of both equipment 5 and 7 must communicate with each other frequently. There is the hassle of having to deal with the situation while doing so.

(2) When instructing control to both master stations at the group boundary, it is enough to operate the switch once before switching, but during switching, the switch must be operated from both the current equipment 7 side and the new equipment 5 side. It won't happen.

(3) If a problem occurs during verification on the new equipment side during the changeover, the switch SW1 will be returned to the current equipment 7 side, but the following operation will be interrupted.

(3a) Due to the nature of the flow group configuration, changing the switch will cause group flow, resulting in interruption of communication function for approximately 2 minutes.

(3b) It takes several minutes for the current equipment 7 to fully understand the status of the master station 1° while the new equipment 5 is operating it.

(4) Slave station 2. Information exchange between 21 and 21 can be detoured through the man-machine interface via the route between master stations in the event of line abnormality, but the detour route cannot be created during the switching.

An object of the present invention is to provide a switching method that can reliably and easily switch from current equipment to new equipment while ensuring system operation status.

Means and operation for solving the E0 problem In order to achieve the above object, the present invention provides a remote monitoring and control system with a floating group configuration in which a large number of slave stations belong to one of a plurality of master stations on the control center side. new equipment that is equipped with a master station equivalent to the current equipment on the control center side and that can be replaced from the current equipment;
The slave station is inserted into a transmission line that connects the master station of the current equipment and the slave station of the new equipment, and the master station of the current equipment and the corresponding master station of the new equipment are switched to series connection for the slave station. When switching from the current equipment to the new equipment, the master stations corresponding to the switching unit are sequentially connected in series to verify the functionality of the new equipment. By connecting the master stations in series, it is possible to monitor the processing status on both sides, and it is also possible to verify new equipment.

Furthermore, monitoring and verification can be performed by connecting both master stations in a branched manner or switching between serial and branched connections.

F. Example FIG. 1 is a circuit diagram showing an embodiment of the present invention.

The switching unit 4A is the master station 11 and slave station 2 of the current equipment 7! A selector switch 5w4I is provided only on the downlink transmission line among the transmission lines of the switch SW4. Nyote master station 1. and the slave station 2, or the master station 6 of the new equipment 5. Insert in series. Similarly,
The changeover switch S W 42 is used for master station 1□ and slave station 2. Direct connection or master station 6! Performs switching to insert in series.

A switching section 4A having the above-mentioned configuration is provided, and a changeover switch S is provided.
When W 41 and S W a 2 are switched to the state shown in the figure, in group G+, the master station 1 of the current equipment 7 and the new equipment 5
．． and 6 are connected in series, and the master station 1. Information transmitted and received between the slave station 2□ and the slave station 2□ is also transmitted and received to the master station 6.

Here, master station 1□, 6. As a transmission/reception process, when each side receives a transmission signal from the other side, processing equivalent to transmission completion is performed on the condition that the source code is the same as that of the local station and that the local station is not transmitting. In this case, even if both master stations exist, the originating process is performed by one master station. In addition, when the other party's master station sends a reply signal in response to a selection signal from a slave station, the destination code is the master station, and the reply code is discarded based on the consistency of the contents of the selection code and reply code and the sense of time. , the communication signal from the slave station can be taken into both master stations. Therefore, even during the transition period when switching from the current equipment 7 to the new equipment 5, the system operation on the current equipment 7 side can be carried out while the parent station on the new equipment 5 Station 6. Functional monitoring and verification can be performed. For example, it is possible to check the validity of control communication from the master station 61 while continuing the post management of group G1 by the master station 11, without causing interference between the current equipment and the new equipment. It is possible to verify the identity of both equipment using one monitor. Furthermore, even if a line abnormality occurs during switching, the current equipment 7 can respond appropriately.

Moreover, in order to command control to both master stations at the group boundary, since the master stations 1+ and 6+ are connected in series, it is sufficient to pass the command to one of the master stations. Furthermore, switch S in the middle of switching
W4. Even when the master station 6 is restored, the master station 1.9 is still removed and the master station 1. management can continue, and communication functions will not be interrupted.

FIG. 2 is a circuit diagram showing another embodiment of the present invention. In the figure, the switching unit 4B includes a branching device D on the upward transmission path from the slave station to the master station, and transfers this branch signal to the new equipment 5.
is given as an upstream signal to the parent stations 61 and 62 of the corresponding group. Further, the switching unit 4B includes changeover switches 5W43 and 5W44 on the downlink transmission path from the master station to the slave station, and switches the downlink signal from the master station 10, 1□ to the master station 61, 62.

According to the above configuration, information exchange with the slave stations can be executed by one of the master stations branch-connected to the current equipment 7 and the current equipment 5, and the other master station monitors the information exchange. be able to. Therefore, similar to the series system shown in Figure 1, the second
In the branching method shown in the figure, function monitoring and verification can be performed while continuing system operation during the transition period of switching from the current equipment 7 to the new equipment 5. In this embodiment, compared to the above-mentioned serial system, the master station of the new equipment 5 is not directly inserted into each group at the time of switching, making it unnecessary to revise the transmission route.
Furthermore, it is possible to verify the functionality of new equipment while locking the master station output.

Note that verification by parallel operation by both master stations, which is an advantage of the serial method, cannot be performed, but this can be done by using a combined serial/branch method in which the switching unit can switch between the serial method and the branch method. Figure 3 shows a circuit diagram of the main parts of the combined series/branch system. In the figure, the interlocking switch S W a s is in the illustrated state in a series manner and is switched in a branching manner, and a changeover switch SW 411 switches from the current equipment to the new equipment.

Effects of the G1 Invention As described above, the present invention connects the master station of the current equipment and the master station of the new equipment in series or in branch connections, and also in switching between series and branches, so that both systems can be connected while continuing system operation. The master station can monitor and verify new equipment, and it can also respond to line abnormalities during switching, making switching reliable and easy.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, Fig. 2 is a circuit diagram showing another embodiment of the invention, and Fig. 3 is a main circuit of a series/branch combination system showing another embodiment. 4(A) is a circuit configuration diagram of a floating group configuration, FIG. 4(B) is a diagram of a state in which the line configuration is deformed when a line abnormality occurs, and FIG. 4(C) is a diagram of the configuration deformed due to a line abnormality. FIG. 5 is a conventional switching circuit diagram. 1□, 12... Master station, 21.26... Slave station, 4A,
4B. 4C...Switching section, 5...New equipment, 61.62...
Master station, 7...Current equipment, 8.9...Man-machine interface. Figure 3

Claims (3)

[Claims] (1) In a remote monitoring and control system with a floating group configuration in which a large number of slave stations belong to one of a plurality of master stations on the control center side, a master station equivalent to the current equipment on the control center side is provided, and The new equipment to be switched is inserted into the transmission line connecting the slave station, the master station of the current equipment, and the slave station of the new equipment, and the master station of the current equipment and the corresponding master station of the new equipment are connected to the slave station. and a switching unit capable of switching to series connection between the current equipment and the new equipment, and the switching unit sequentially connects the corresponding master stations in series when switching from the current equipment to the new equipment to verify the functionality of the new equipment. Control system equipment switching method. (2) In a remote monitoring and control system with a floating group configuration in which a large number of slave stations belong to one of a plurality of master stations on the control center side, the system is equipped with a master station equivalent to the current equipment on the control center side. The new equipment to be switched is inserted into the transmission line connecting the slave station, the master station of the current equipment, and the slave station of the new equipment, and the master station of the current equipment and the corresponding master station of the new equipment are connected to the slave station. and a switching unit capable of switching between the current equipment and the new equipment to a branch connection, and the switching unit sequentially connects the corresponding master stations in order to verify the functionality of the new equipment. Control system equipment switching method. (3) In a remote monitoring and control system with a floating group configuration in which a large number of slave stations belong to one of a plurality of master stations on the control center side, the system is equipped with a master station equivalent to the current equipment on the control center side and is connected to the current equipment. The new equipment to be switched is inserted into the transmission line connecting the slave station, the master station of the current equipment, and the slave station of the new equipment, and the master station of the current equipment and the corresponding master station of the new equipment are connected to the slave station. and a switching unit that can switch between series and branch connections, and when switching from the current equipment to the new equipment, the switching unit can sequentially connect the corresponding master stations in series or branch connections to verify the functionality of the new equipment. Features a facility switching method for remote monitoring and control systems.