JPS58134597A - Connecting system between systems in data exchange - Google Patents

Abstract

PURPOSE:To avoid a failure of one system to adversely effect a main control section of the other systems, by providing an independent data bus of a data bus of the main control section between duplexed line control sections. CONSTITUTION:Duplexed line control sections 12, 22 are connected with an independent bi-directional data bus DB3 of data buses DB1 and DB2 from respective main control sections 11, 21 to attain direction control of the bus DB3 between the control sections 12, 22 with an emergent control section 3. When both the systems are operative, since connection signals CN1 and CN2 from the control sections 11, 21 of both the systems are turned on, it is possible that the bus DB3 between the control sections 12 and 22 is outputted from bus driver/receivers B12, B22 of both the systems. To prevent this state, direction control signals DC1 and DC2 from the control section 3 are provided, and at least one of the signals is set at off-state to inhibit the bus drivers/receivers of both the systems to output the data.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technological division of the invention The present invention relates to an intersystem connection system in a data exchange device, and in particular, to ensure high reliability, it is possible to periodically The present invention relates to an intersystem connection method in a data exchange device that requires switching over to prevent potential failures.

(2) Differences between the prior art and the prior art A conventional type of intersystem connection system in the data exchange device as described above is shown in FIG. In the conventional connection system shown in FIG. 1, the data bus DB from the first system main control unit 11'
-1' is connected to the line control unit 12' of the first line and the line control unit 22' of the second line, and the data bus DB・2' from the main control unit 21' of the second line is also connected to the line control unit 12' of the first line. i control unit 11
' and the second system line control section 22'. 1st
The main control units 11', 21' of the system and the second system are also connected to the emergency control unit 3', respectively. Therefore, the data exchange apparatus shown in FIG. 1 is constructed so that the main control section 11' or 21' of one system can directly control the line control sections 12' and 22' of both systems.

For example, in the connection system shown in FIG. If the driver outputs a signal to the data bus DB-1' and remains stuck, it may have an adverse effect on the main control unit 11', making it impossible to continue driving. In this case, there is a drawback that after switching from the second system to the first system, initial settings must be made again to restart the call processing I.

0) Purpose of the Invention The main purpose of the present invention is to solve the problems of the conventional type described above, and to provide a duplex data exchange device in which data from the main control section is not transmitted between the duplex @ line control sections. A data bus independent of the bus should be provided, and a failure in the line control section of one system should not have an adverse effect on the main control section of the other system.
11L provides a reliable system-to-system connection method.

(4) Structure of the invention ゛In the present invention, nine main control units are duplicated, an emergency control unit that monitors the main control units, and a line control unit that is duplicated and operates synchronously. In the data exchange device, the nine duplicated line control units are connected by a bidirectional data bus independent of the data bus from the main control unit,
The emergency control unit controls the direction of the bidirectional data bus between the line control units, and the insect control unit controls its own w! It is characterized by instructing the line control unit to switch between own system connection and other line connection, and enabling the main control unit of the other system to control the circuit control units of both systems. An intersystem connection scheme in a data exchange device is provided.

(5) Embodiment of the Invention An inter-system connection system in a duplex data exchange device as an embodiment of the present invention is shown in FIG. The data exchange device in FIG. #I2 is the main control unit 11, -1 of the first system.
System o[11+I1 section 12, second system main control section 21. Second
;t& times - control section 22, and emergency control sections m', c
It consists of Data buses DB-1, mJ[M”ml, CN-
1, ff1j-)'/1ite control signal RW-1 is connected. Similarly, the main control unit 21 of the second system and W
The AIiA control unit 220 has a data bus DB-2, a self-system connection signal CN, and a read/write control signal R.
W.1 is connected. 1st system and 112. A monitoring signal fMN- is sent from the main control unit of I, il, 21 to the emergency control unit 3.
1 and M) J.2 are connected respectively. Direction control signals DC.1 and DC.2 are connected from the II sudden control section 3 to the first system and second system circuit control sections 12.22, respectively.

Between the first system and the line control unit 12.22, there is a data bus DB independent from the data bus DB-1 and Dll-2 from the main control unit 11.21 of the first system and the second system.・3 is connected. Fi and read/write signals RW-1 and RW.2 from the first system and the second system are connected between the am control units 12.2'2O. The first system line control unit 12 includes a control register C1, a data bus driver receiver [port 112] and its direction control circuit C11.
, C12 are provided. Similarly, the second system line control section 22 includes a control register, */-52, data parallel line/'-V V-/'"""B21.B22 and its direction control circuit 1)21.B22. is provided.

In the normal operating state of the data exchange device shown in FIG. 2, one main control section (for example, the 111 system 11) is operated in an operating state, and the other (second system 21) is operated in a standby state. In this state, the main control unit 11's own connection signal CN-1 is off, and the main control unit 12c)' own connection signal C
N.2 is turned on, and the direction control signal DC-1 from the emergency control □3 is turned on. Therefore, the main control section 11.
The data sent from the control register CI of the line control unit 12.22 of both systems.

Written to C2. The same holds true when the main control section 11 is in the standby state and the main control section 12 is in the operating state 1, and data sent from the main control section 12 is also written to the control registers c1sc2 of both systems.

By the way, when the 2nd system and the 2nd system are operated independently, both the own system Il connection signals CN and CN・2 of the main control unit 11.21 of both prefectures are on, and the respective The main control unit is self-system 1! ! It will control the control unit. In this case, both systems are operated independently, but one system (for example, the first system) controls the acquisition line, and IglIIIi! The data bus B3 between the control units is
The main controller 811 of the first system is in a state of controlling the line control unit 22 of the second system. However, the Tm line control section 22 is sectored by the self-system connection signal from the main control section 21 to a state in which it does not receive data from the data bus DB-3 between the main control section and the control section.

As mentioned above, when both systems are in the operating state 111, the O own system connection signals CN-1, C'N・2 are sent from the main controllers of both systems.
is on, the data bus DB-3 between the line control units
There is a possibility that data will be output from the bust 2 IP receiver B12#B22 of both systems. In order to prevent such a situation, the direction control signal DC・
1. DC.2 is provided and this direction control signal D
At least one of C-1 and DC・2 is always off 11
If set to 1, both path driver receivers are prohibited from outputting data.

(6) Effects of invention 1! - According to the present invention, in a duplex data exchange device, it is possible to prevent a fault in one system from having an adverse effect on the main control unit of the other system, thereby increasing reliability. It is possible to provide a highly flexible system configuration.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing an intersystem connection method in a conventional duplex data exchange device, and FIG. 2 is a block circuit diagram showing an intersystem connection method in a duplex data exchange device as an embodiment of the present invention. FIG. 2 is a circuit diagram showing an inter-system connection method. (Explanation of symbols) 11', 112: Main control unit of the first system, 12', 12: Line control unit of the first system, 21', 21: Main control unit of the second system, 22', 22: Main control unit of the second system. System l-line control section, 3F, '3
: Emergency control department, B11. B12,1121. B22s data path driver recipe, 1, II'. C1, C2 heat control regime, "':: DIl, D12.D21.D22: path direction control circuit,
D11'#D12'lDB"l#DB・2.DB-3g
Data bus, CN・1. CN・2: Own system connection signal, DC・1. D.C.
・2: Direction control signal, MN-1', MN-2'eMN
-1#MN・2g monitoring amount, RW-1, RW・2: Read/write control signal. Patent attorney Fujitsu Kinsha Patent application agent Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney Yukio Uchida Patent attorney Akira Yamaguchi

Claims (1)

[Claims] In a data exchange device comprising a duplicated main control section, an emergency control section that monitors the armpit main control section, and a duplicated ull control section that operates synchronously, The line control units connected to each other are connected by a bidirectional data bus independent of the data bus from the armpit main control unit, and the emergency control unit controls the direction of the bidirectional data bus between the line control units. At the same time, the cough main control section instructs the line control section of the own system to switch between the connection of the own system and the connection of other lines. An inter-system connection method in a data exchange device characterized by: