JPS59171236A - Backup method of transmitter - Google Patents

Abstract

PURPOSE:To supervise failure of a stand-by system and to reduce the switching time by receiving data sent from an input/output device by the stand-by system in parallel with the common-use system. CONSTITUTION:Since a transmission station 6B of the stand-by system reads periodically input data of an I/O and updates the input data in the own memory, it is not necessary to read the input data by the stand-by system at switching of the transmission station and the switching time is reduced. Further, the stand- by system does not transmit a multile address communication frame and stations 6A, 6B are provided respectively with external line output terminals 42A, 42B and failure signals 43A, 43B are inputted to the I/O3 and transmitted to other stations via the transmission station of the common-use system as control input data.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The invention is based on a control system, a process controller, and an input/output device (hereinafter referred to as process 10), each connected to a transmission station by a transmission loop. The data transmission equipment (2) accommodates two transmission stations for Ilo, and is used for bank-up methods of data transmission equipment that can be switched between active and standby.

[Banmei υTechnology 9 back springs and their problems] Section 1 [2i10] The general configuration of a data transmission device that connects a sending station to 1 for bank up is shown.

FIG. 1 (2 and 2 old) Decorative meter 1, process controller 2, and 103 are connected via transmission stations 4, 5, and 6A, respectively, , through which data is mutually exchanged.

8 is a regreen control device.

110 is further provided with a second bank up station 6B, and 6A and 6B are used alternately via the bus switching device 9 (= active and standby). □
1 Figure 2 (Second back tube station, ni, l j
1 shows the basic circuit configuration of a bus switching device from 1944.

In FIG. 2 1-, the abnormality detection/switching circuit 10 in the bus switch 1 central location 9 is connected to the transmission stations 6A, 6B, and Q.
The fault signals 21A and 21B are monitored, and when a fault in the active transmission station (6A in this case) is detected, the controller signals 16A, 6B, 7DV from the transmission stations 6A and 6B are sent. 7.1
4A, 14B, bus switching length receiving data 15A, 15B, gates 11A, 11B in box 9
, 12A, 12B, 13A, 13B, , by switching signals 17A and 17B to connect Ilo bus 1) 1, 1.
9.20 to active system 14A, 15A, 16A, standby system 14B; 1513.16B f: Switch. This (2) allows the standby transmission station (6B in this case) to access Ilo (2) and performs backup.

However, with the above method, the standby transmission station cannot access 9 Ilo unless the active transmission station fails and the bus is switched. Therefore, other transmission stages cannot transmit data immediately, which is an obstacle to the system's fast response.

, : j The transmission equipment shown in Figure 1 uses the status signal in the +ii + Mengxin frame to monitor abnormalities, but the transmission equipment of the νj waiting system in Figure 2 above = 7.
Since the station was not transmitting a broadcast communication frame, the transmission equipment (two connections were protected).There was also a problem that the external equipment was not able to monitor the standby transmission station for abnormalities.

[Object of the invention].

The present invention provides a transmission device having a backup transmission station at Ilo (2) - A standby transmission station can also read data from Ilo and store it (2) a standby transmission station (- related status). The signal is added to the broadcast communication frame of the active system transmission station (2) and transmitted, thereby speeding up the response when switching between the active system and the standby system. The purpose is to provide a rational backup method for transmission equipment that can be monitored from the device.

[Summary of the invention]

The present invention connects a pair of transmission stations in a transmission device in which a plurality of transmission stages are connected via a transmission loop to an input/output device via a bus switching device, and one of the transmission stations is connected to an input/output device through a bus switching device. System 1. A method for backing up a transmission device in which the other is operated as a standby system (2) The pair of transmission stations described above - 10,000 errors or startup order (2 pairs of windows, regular system and standby The system performs the dual functions of transmitting data from the input/output table to the data Q father and the input/output device.
During normal operation, the reception of data from the input/output y side is performed in parallel with the regular system, thereby shortening the switching time when switching between the standby system and the regular system.

Furthermore, the abnormal signal of the above pair of transmission stations is input as control data to the input/output device, and the transmission loop is transmitted via the regular transmission station.
We are considering this so that we can monitor whether the standby system is normal or abnormal from an external monitor.

[Embodiments of the invention]

An embodiment of the present invention is shown in FIG.

In Figure 3, bus switching device 9 (2), abnormality detection switching circuit 10 and control gate circuits 13A and 13B in the case of Figure 2 (9) (-5 transmission station 6),
Abnormality detection circuit 2 that detects the abnormal state of A,',, 6B
9. Clip-flop 30 for storing the detection state
, status signal 36A from the flip-flop, +
36B and transmission station 6A, 6B read signal 34A + 34B write signal 35A, 35B from valley gate IIA.

11B, 12A, 12B, a gate control circuit 31 that emits an i control signal, and the same input signal as the "two gate control circuit 3" and an Ilo
In response to the response signal 39 from 3, the EF o a' T read signal 40.3 is received. Light Toy No. 1 41 is emitted (2. Transmission Station 6A.

613 +: A control signal tpH control circuit 32 is used that issues response signals 33A and 33B, and an external terminal block 42A,
, 42B to the engineering 103 (-fault signal 43A, 4
3B is now input.

``Two self-gage (♂ meeting) l Huangde Masa no jro 29 is sent to 1 Sten Yong 6A, 6B from the late chapter 1 I, j shiji 2]A
, 2113 is in "goods"; J- condition, and either power "i', & 1li ('s lifting platform runs at a normal station, - starts operation first when both are normal. Station j, which inactivated the fault signal, 4%
One system, the other as a temporary port.

The flip-flop, 3o, remembers Tomo's sorrow and makes the output signals 36A, 36B active and the 74J square sword inactive, and the inactive one.

In order to periodically perform normal transmission station/offline operations, the bus switching device 9 performs read/write operations from the transmission stations 6A and 6B when both the 21 bus stations are normal. Ru. By the way, gate control circuit 31.・Control E No. 1Ull f
l! 11 circuit 32 accepts read/write operations from the active transmission station and read operations from the standby system, but does not accept operations from the standby system; The transmission station does not perform the output of (10) and can update the input data.

Write operations from the active system and read operations from the active/standby systems will be described below with reference to FIGS. 4(A), (i3), and (C).

Write operation from the standby system (Two explanations will be given. (Assume that the transmission station 6A starts first and becomes the active system.) (1) Write operation from the active system (6A) (Fig. 4 (A) )
(See) The transmission station 6A outputs the I10 address and write data to the address bus 14A and data bus 15A, respectively, and outputs the write-n35A according to the 7th rule. When this write signal 35A is exchanged, the bus switching device 9
The gate control circuit 31 in the address gate J1
A and data gate 1-12A gate control input/output +'i 37A, 38A and address bus 1
4A, data bus 1.5A, address bus 6"&10BI address bus 19, output to data bus 19.

In addition, control No. 16 control circuit 32 and light No. 41 3
5A, output the write signal 41 for j Ilo,
Upon receiving the response signal 39 from Ilo (i), it outputs a response signal 33A to the transmission station 6A.

When the response signal 33A is returned, the sending station 6A stops outputting the address, data, and write signal, and ends the write operation. (2) Read operation from the standby system (see Figure 4)
B) Brass 1 Shell) Read operation from the active system (Two will be explained. 1 from the standby system) - The read operation from the standby system is also at the same level.

Transmission station 6A outputs address bus 1.4A iuni 10 address and then outputs lead 16 34A.

When this lead lip 31A is received, the bus cutting device 9
The gate control circuit 31 in the address gate 11
A and Demegame) Output gate control im numbers 37A, 38A' to 12A and address bus]
・The data gate 12A sends the contents of the data bus 19 on the I10 side to the data bus 15 of the transmission station 6A 1ilil.
A-\Output Z-ru.

When the control signal +1ilJ control circuit 32 receives the read signal 3.'+A, it outputs the read signal 40-\ to Ilo.

When Ilo receives lead 16 40, it connects data bus J9.
Output the data to the file and output the history (second chain, answerer No. 39).

When the t1 circuit 32 receives this response signal, it sends a response signal 33 to the transmission station 6A.
A, the transmission station 6A outputs data \JC, stops outputting the read signal /'0 address, and ends the read operation.

(3) Li-operation from the standby system (see Figure 4 (C))
The transmission station 6B outputs the write signal 35B after outputting the address bus UN, the data bus 15B (two addresses, the I10 address, and the write data), but the gate controller 17 circuit 31 outputs the write signal 35B from the flip-flop 30 (i3
The gate control circuit 3 does not know that the input signal 36B (2), 9 transmission station 6B is a f-koya system.
7B, :s8B is not output.

The control signal control section 32 also does not output the signal signal 41 to Ilo, and the control section 32 does not output the signal signal 41 to Ilo.
Dump and output 33B of ``6'' to B.

The response signal 33B is received by the response signal 33B. 6- When the write Buddhist sword is received, 1.10 Stops the output of the address and write data. 1. Ends the assistant production. 3. The transmission device can also update the input data in its own memory by periodically (reading) the input data of I10, so there is no need for the standby system to read out the seven-person data again when switching the transmission data. Therefore, the switching time is shortened. □The standby transmission station transmits the broadcast frame) □Since the frame is not transmitted, the line control device 8 monitors the I'b] broadcast frame λ and each transmission station (In the two-transmission method, it is not possible to determine whether the standby system is normal or abnormal from an external detector connected to another transmission station).

Therefore, in the invention, as shown in FIG.
A.

42B, and the abnormal signals 43A and 43B are
``3F is operated by two people, and K11L and 11 people are sent to other transmission stations (two units) via the active transmission system as data carriers.

As a result, whether the standby transmission station is abnormal or normal can be transmitted to the valley transmission station without any special transmission procedures such as polling.

[Effect of the invention]: As explained above (-uninvented), if the standby system of a pair of transmission stations used by switching between the regular system and the standby system is normal, input data is always sent to the standby system. This is a rational method that allows data to be read periodically to update the data memory, thereby reducing the switching time by eliminating the need to read data again when switching from the standby system to the regular system c'. A method for backing up the transmission device is obtained.

In addition, the signal indicating whether the standby system is normal or abnormal is sent directly to the input/output device [1].
Since the transmission loop is transmitted manually and via the regular transmission station, it is easy to determine whether the standby system is normal or abnormal from external equipment connected to other transmission stations.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a general configuration of a transmission device to which the present invention is applied, Fig. 2 is a system diagram showing an example of a conventional backup method, and Fig. 3 is a system diagram showing an embodiment of the present invention. , 4th
Figures (A, )"', (B), and (C) are time charts showing the operation of Figure 3. □1 Control computer □2 ・Process controller 3 Input/output device 4, 5.' 6A, 6B Transmission station 7
Transmission loop □ 8 Line control device 9 Bus switching device ilA, 'itg, 12A', 12] 3
Gate ・・29
Abnormality detection circuit 30 Flip flow rough 1' □31
Gate control circuit 32 Control No. 18 control circuit (8733) Agent Patent attorney Inomata
Yoshiaki (Katana, 1 person) (U) 14 Figure: , (B)

Claims (2)

[Claims] (1) A pair of transmission stations in a transmission device in which a number of transmission stations are connected via a transmission loop are connected to an input/output device via a bus switching device W, with one blade for regular use and one for standby. Backup method for a transmission device that operates as a system (2) The above-mentioned pair of transmission stations are changed into a normal system and a negative system in response to an abnormality in one or the start! The standby system performs both communication of data from the input/output device 2 and the dead device, and receives data from the input/output device in parallel with the active system when the standby system is normal. What can I do? '41 characteristics and 1-1 transmission equipment (IT backup method. (2) - Input the abnormality/number 1 of the pair of transmission stations as the input/output device (two copies) value j data,
A method for backing up a transmission device according to claim 1, wherein light is transmitted to a transmission loop through a transmission station of a common thread.