JPH02155339A - Abnormality communication system for remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To instantly inform the abnormality of a host section of each station with a high fault occurrence probability to a master station by providing a transmission/ reception section and an abnormality monitoring section on a local section of each station and inhibiting transmission of all signals such as a token signal when the abnormality monitoring section decides the presence of the abnormality to the host section of its own station. CONSTITUTION:A transmission/reception section 51 calls a host section H every prescribed time. The abnormality monitoring section 52 decides whether or not the host section H is normally operated based on a reply signal at that time. When the abnormality takes place in the host section H, the abnormality monitoring section 52 outputs a high level signal to an AND gate 53 with an inverting input terminal. Thus, the output of a cyclic signal transmission/reception section 54 is locked and no transmission of signals such as a token signal is given from a slave station 21 having the abnormality to a loop line and the presence of abnormal reception is caused in an adjacent slave station. Thus, the abnormal of the host section H of the slave station 21 is instantly reported to the master station 11. Thus, the slave station 21 is disconnected and the relay and terminal mode of each station is changed.

Description

Detailed Description of the Invention Δ, Industrial Application Field The present invention connects a plurality of master stations and a large number of slave stations by a loop line for each master station, and when an abnormality occurs in the loop line, the slave stations for each loop line are connected. This relates to remote monitoring and control equipment with a floating group configuration that restores communication functions by changing the affiliation, and in particular, 5υ constant communication of remote monitoring and control equipment that notifies the master station of abnormalities in the post computers of each slave station, which mainly controls communication with the outside world. Regarding the method.

+1, Summary of the Invention The present invention is characterized in that a computer in six stations is divided into a host part and a local part, and a computer in a plurality of master stations is divided into a host part and a local part in a plurality of slave stations. In a remote monitoring and control device with a fluid group configuration, which is connected by loop lines and recovers the communication function by constantly changing the affiliation of slave stations to each loop line, the host unit is called from the local unit at regular intervals. , determines whether there is an abnormality in the host unit based on the response signal, and 7d
By prohibiting the abnormal station from transmitting token signals when it is always present, it is possible to detect an abnormality in the post section with a high probability of failure at an early stage, change the affiliation of the slave station, and disconnect only the abnormal station. It has been made possible.

C0 Prior Art FIG. 2 shows an example of a circuit configuration of a remote monitoring and control system having a floating group configuration. (A) in the figure shows the normal state of the line. Three master stations 11-1. 9 slave stations for 2. ~28 are three loop lines 3. .about.33 belong to and are coupled to one master station 11-13, respectively. Loop line 3. The transmitted and received data is circulated in one direction (indicated by an arrow) to slave stations 2. to 33. ．． 2
7 is operated in the terminal mode belonging to both loop lines, and the slave stations 2.7 except these slave stations are operated in terminal mode. ．． 2. ．． 23.2. ．． 2
．． ．． 2. .

28 is operated in relay mode.

Furthermore, in the terminal mode, the one that communicates with the master station is called Mokusai, and the one that does not communicate with the master station is called Masaki. 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, in the event of a temporary failure in which transmitted and received signals are temporarily destroyed or disappeared due to noise or the like, failure recovery processing is performed while leaving the line configuration as is. In addition, each loop line 3. ~3. The communication function for all slave stations can be restored by changing the affiliation of the slave stations.

FIG. 2(B) shows a state in which the line configuration is deformed due to the occurrence of a continuous [-j1 line abnormality] between the r stations 21 and 27, and the slave stations 21 and 2. changes from relay mode to terminal mode and line abnormality I
Isolate the circuit from the healthy circuit. However, as it is,
Child station 2. ．． 2. is not connected to any master station, so
There is no communication function for slave stations 27 and 23. Figure 2 (C)
shows an example of the line configuration state after communication function is restored. Same figure (C)
Now, slave station 2. and 2. The recovery line configuration is shown when it is determined that there is an abnormality in the line between 3. and 3. Main station II
Belongs to subsidiary station 2. and 23 are loop lines 3. At the main station I,
Belongs to.

Hereinafter, the communication system between each post (master station and slave station) and the conventional processing system when a failure occurs will be explained in detail with reference to FIGS. 3 and 4.

First, the communication method normally transmits one free token signal (FIG. 4a) of a synchronous code and a constant code to the loop line 31.
33 respectively, and when the communication data post receives a free token signal, it converts the free token signal into a synchronous code and a constant code pinot token (+:":
At the same time, the transmission data (FIG. 4b) following the busy token signal is sent, and the transmission of other posts is prohibited by the circulation of the busy token.

In FIG. 3A, this normal processing is performed along the path of failure a no detection if < IO and normal operation processing + M < 20. That is, a change in the signal received from the loop line is determined (S11), a determination is made that the signal includes a token (S12), and a determination is made as to whether the signal is a busy token (S11). It is checked whether the received signal is a regular busy token or fleet token by S+3) and a determination as to whether it is a fleet token (S14). When a busy token is received, the data following the busy token is a decomposition code (Fig. 4 d), 1 separation prevention group code (Fig. 4 e).
), it should be determined that it is not a clear code (Fig. 4 f) S2
+), condition that self-post is not being sent (S22)
The received signal is relayed at (S23). In addition, when receiving free tokens, you can check whether there is sent data in the self-post (S
24), and if there is no data to send, execute the corresponding fleet token u (S23), and if there is data to send, change the fleet token to a busy token, add the data to send, and send 525), ending this transmission. At (326), free tokens are injected (S27).

Next, temporary communication abnormality processing will be explained. In the fault detection ff1lO, when there is no change in the received signal (511), the fault processing unit 30 manages the timer when there is no change in the received signal. For a long time, the iron is set to 1.5 seconds) 531) It is determined whether the set time has been exceeded and the second set time (-) is determined in terms of time between failures and continuous failures. (2.8 seconds in this case) (S32), a continuous zero code (C in FIG. 4) is sent to the loop line (S33). By injecting continuous zero codes, the 'F style post does not include a token (SI2). It is switched whether or not token missing is detected for the received signal (S34), and continuous zero codes are checked when there is no token missing (S34). S35), and by detecting the code, a consecutive zero sign i''- is injected (S33). By injecting consecutive zero codes into each post, the loop line is filled with consecutive zero codes. On the other hand, it does not include tokens (S I 2)
When detecting missing tokens in the received signal (S3
4) When this detection time is temporary and not continuous (
In S36), the shortest detection time post injects a fleet token as a temporary failure (S37). This shortest time is assigned to each post as the detection time when a token hole occurs, and the post set to the shortest time injects a fleet token instead of a continuous zero code. By injecting the free tokens, the free tokens start circulating in the loop line, leaving the loop line configuration in a normal state and recovering from a temporary failure.

Further, in the - time failure processing unit 30, when the token is neither busy nor free in the failure detection unit IO, that is, when the token is defective (Sl4), this detection is performed more than a predetermined number of times (7 times in this example) of the received signal. It is determined whether or not to continue (S38), and if the predetermined number of times has not been reached, the received signal is relayed as is (S39). Then, until the number of token failures exceeding 7 reaches 4 (S40), the tokens are converted into fleet tokens and injected (S41). Through such processing, recovery processing against temporary disappearance or destruction of tokens due to noise or the like is achieved.

In the temporary failure processing described in Section 11, step S32,
S36. Obtained a judgment that the failure was not temporary due to S40,
Based on this determination, the continuous failure process shown in FIG. 3(B) is entered.

In the figure, the fault localization processing unit 50 sets the continuous fault detection (flag) 551), determines whether the self-boost is currently in the relay mode or terminal mode 552), leaves the terminal mode unchanged, and sets the relay mode. If so, switch to terminal mode and send a clear signal to the healthy line side (Figure 4 r)
is injected (S53). As a result, if the boss closest to the failure location is disconnected, for example at point P in FIG. 2 (Δ), the boss 2. enters terminal mode, isolates one side of the faulty line, and injects a clear signal to Bost 2JI11, which becomes the healthy line.

Next, the boss 2. which is in terminal mode. is the faulty line side (S
54) at predetermined time intervals (1°3 seconds in this example) (S55). The boss 21 that receives this decomposition code should check whether it is in relay mode or not (556).
, the terminal mode remains unchanged, and the relay mode is switched to the terminal mode, and the normal line side boss 1□heklya signal is injected (S57). As a result, the faulty line location (point ■ in Figure 2) is separated from the loop line, and
Obtain fault localization in the state shown in 3).

In this fault j15 localization process, boss 2. .

23 is in an isolated state that does not belong to any master station, and boss 2-. Based on the determination in step S54 on the 23 side and step 858 on the BOST 2 side, the isolation resolution/line recovery processing unit 60 performs processing on the healthy line side.

In the state shown in FIG. 2 ([3), 2 and 2 change from relay mode to terminal mode. The boss is a healthy line 3. and 3
x is used to cause the valley post to report the current mode (relay or terminal) (S61). After reporting this mode, it is checked whether the boss is in a healthy line state and is designated as terminal mode or relay mode (S62). In this check, Bost 2. ．． When 23 is designated as relay mode, check whether the current mode is terminal mode or relay mode (563), and when in terminal mode, the corresponding post 2
．． Please check whether there was a reception error in either the main system or the slave system.
．． ．． 2. Specify the mode while leaving the terminal mode (S
65), maintain the posts 21 and 2° in terminal mode. Also, the boss 23 does not specify the terminal mode (S62
), it is not in terminal mode (S63), and there is no reception abnormality in either the main system or the slave system, so it remains in relay mode after the check in step S76 (S77). Also, Bost 2
4, the terminal designation is changed in step S62, and the current mode is terminal mode (S68), there is no reception abnormality in either case (569), and there is no master station on the 3x line side (570).
, there is a terminal with a lower number (Bost 2) (S71), and there is a reception abnormality in the BOST 23 (S72), so the mode is switched to the relay mode (S75).

Through such processing, the boss 21 becomes the master station 1. Belongs to Boss 2. ．． 2. is the main station 1. As shown in FIG. 2(C), isolation is eliminated.

Note that steps S79 to S82 and others show mode reporting and processing for the remaining bosses such as boss 2°, and line recovery processing at the time of failure recovery, which will be described later.

Next, when a failure such as disconnection of the loop line is recovered, the failure recovery detection unit 7o performs detection and the isolation elimination/line recovery processing unit 60 performs processing based on this detection. Failure recovery detection is performed when the boss 2. But Bost 2. , and the boss 21 also relays the received decomposition code (S91). For this decomposition code, Bost 2. Due to two abnormalities, no decomposition code is received (S92), and decomposition codes are injected every 1.3 seconds in step S55. In this state, if 13 points of failure are recovered, the boss 2. receives the decomposition code (592), determines that the failure has been recovered, and resets the continuous failure detection flag (S93).

With this, Bost 2. stops decomposition code injection, and bost 2. Then, the decomposition code is no longer received (S94), and fault recovery is detected.

These bosses 2. ．． 2. From the failure recovery detection in
．． ．． 3. ．． At step 3Y, a mode report is made and the isolation elimination/line recovery processing unit 6o returns the loop line to the original line state shown in FIG. 2 (Δ). This process is performed by Bost 2. ．． 2. Steps 562-963-S 64-866→S 6
Middle 9th course F1. : Don't go back. In addition, the boss 23 is left in the relay mode along the route of steps S62→S63→S76→S77, and the boss 24 is left in the relay mode from step S62→S77.
Leave the relay mode on the route S68→S79→580-/S81. Here, the boss 212. which has changed from terminal mode to relay mode. However, the mode report is carried out, and the bosses 21 to 2o are all in relay mode, and the master stations I and 1.
It is clear from the mode report of each boss that the configuration has two master stations. For this reason, Bost 2. For steps 562-S68-・S79-S80-98
2(7) On the El path, the terminal mode)' is returned to 1 to eliminate the existence of two master stations. Also, Bost 2. -26, the relay mode is left in the route of steps S62→S63→S76→S77.

Through such processing, the loop line state is changed to the state shown in Figure 2 (A).
Return to the original state shown in .

Each station (for example, I+
, 1-. 2. ~2. ) microcomputer has a host section H and a local jπ≦L(1, +,
1. It is divided into , ). i.e. host 63+
1 is a CPU that mainly controls communication with the outside, and local section L (L,,L,) is a CPU that mainly controls communication with the loop line.

D9 Problems to be Solved by the Invention In the above-described flow group type remote monitoring and control device,
If an abnormality occurs in the local part of the microcomputer of each station, it will affect the data circulating on the loop line, so it can be detected by the communication abnormality handling method as shown in FIG. However, if an abnormality occurs in the post section of each station's microcomputer, the master station is not notified because it does not directly affect the circulating data on the loop line.

For this reason, there is a problem in that when a failure occurs in the host section, that is, when the communication function with the outside is lost and the slave station becomes unable to be monitored and controlled, the master station does not notice.

Furthermore, since the host section has more parts than the local section, the probability of failure occurring is high.

The present invention has been made in view of the points mentioned in -1-, Part 1]
The purpose is to provide an abnormality communication method for a remote monitoring and control device that can discover abnormalities in the post computers of each slave station that mainly controls communication with the outside and notify them to WfL L-, 5.

E9 Means and operation for solving the problems The present invention provides that the processing devices of each of the master station and the slave station are connected to a post section which mainly controls communication with the outside, and a [J-Cal section which mainly controls communication with the loop line. In addition, the local parts of multiple master stations and the local parts of many slave stations are connected by a loop line of the master station fi, and each slave station transmits data carried on the cyclic token of the loop line. A relay mode has a main system that communicates with the master station and a slave system that relays the token and data, and a forward bend mode that has a main system that communicates with the master station on one loop line and a relay system that relays the other loop line. In the remote monitoring and control device, the mode of the slave station can be switched between the terminal mode and the terminal mode of the slave station, and the mode of the slave station can be switched to obtain contact with the master station when a continuous failure occurs in the loop line and when the failure point is recovered,
A transmitter/receiver j1< that sends a signal to call the host l< to the local section of each station and receives a response signal from the host section, and a transmitter/receiver j1< that sends a signal to call the host l< and receives a response signal from the host section; Constant monitoring to determine nothing 11
<>, and when the abnormality monitoring section determines that there is an abnormality, it prohibits the abnormal station from transmitting 1-1 and 11-4 signals.

F. Embodiment An embodiment of the present invention will now be described with reference to the drawings. In FIG. 1, the same parts as in FIG. 5 are indicated with the same symbols. j' - local part of station 2I (local CP
LJ) 1, 1 includes a part of the host (host CPU) I-1
When a signal to call is transmitted, a transmitting/receiving section 51 receives a response signal from the host section 1-I, and the transmitting/receiving section 5 receives a response signal from the host section 1-I.
The received signal of 1 was monitored and the post section II received 5'1! A constant monitoring unit 52 for determining whether an abnormality has occurred or not, and an ant game with an inverting input terminal (1/5:J) with an inverting input terminal to which the judgment output of the abnormality monitoring unit 52 is supplied to the inverting input terminal are provided. It is being

The non-inverting input terminal of the ant gate 53 is connected to the line 3.
cyclic signal transmission for transmitting a cyclic signal (the output of the third section 5.1 is supplied).

A transmitting/receiving unit 51 as shown in L+7. % constant monitoring unit 52 inverted input) 1°j;
- 2o) are also provided in the l-cal part.

In the device configured as described in section 1, the transmitting/receiving section 51 does not call the host 1N (II) at regular intervals.The abnormality monitoring section 52 determines whether the host section tr is operating normally based on the response signal at that time. Determine whether or not there is.

If an abnormality occurs in the host unit ■, for example, the transmission/reception 71
<51, no response signal is received. Then, the -v constant monitoring section 52 determines that the post section 1-1 is in an abnormal state and outputs a high level signal to the AND gate 53 with an inverting input terminal. Therefore, the AND condition of the AND gate 53 becomes configuration q, and the output of the cyclic signal transmitting/receiving section 54 is locked. This causes the abnormality to occur in the slave station 2. From then on, the loop line failure signal and other signals are not transmitted simultaneously, and the adjacent slave station receives the signal constantly (f).Then, failure detection and failure processing as described in Fig. 3 are performed. The abnormality of host im5+1 of slave station 2. is immediately reported to master station 1. Therefore, slave station 2. is disconnected, and the relay and terminal modes of each station are changed.

The above operation is carried out by the master stations 11-1. and slave station 2゜～2n
This is also done in the same way.

G9 Effects of the Invention According to the present invention, a transmitting/receiving section and an abnormality monitoring section are provided in the local section of each station, and when the abnormality monitoring section determines that there is an abnormality in the host section of its own station, the token signal etc. Since simultaneous transmission is prohibited, abnormalities in the host section of each station with a high probability of failure can be immediately notified to the master station. Therefore, in the flow group type remote monitoring and control device, an abnormal station can be isolated at an early stage to perform localization and isolation resolution processing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 (
A) is a line configuration diagram of the floating group system, Figure 2 (13) is a diagram of the line configuration in the process of deformation when a line abnormality occurs, and Figure 2 ((C)
Figure 3 (Δ) and Figure 3 show configuration changes due to line abnormalities.
Figure (13) is the processing flowchart for '+;L request, No. 41
The figure is a waveform diagram of a circulating signal, and FIG. 5 is a configuration diagram of a microcomputer at each station. 11. l-,! a"' Master station, 2. ~ 2, -] -
Bureau, 3183,. 3. ．． 3. ．． 3,...Line, 1■...
・Pos I-in! ,L. t, , , r, . . . Local part, 51 . . . Transmission/reception unit, 52 . Figure 2 (A) To the circular lecture of XID group 2 Figure 2 (B) 2 people outside the group are in the process of reaching the circular lecture of RO 31c Jo-Seigin Figure 2 (C) Circular lecture Always Ej Ru Lecture J U Type Prisoner Ichiichi---J Figure 4 i! ! Five antimorphic circles of circular words

Claims (1)

[Claims] (1) The processing devices of the master station and slave stations are divided into a host section, which mainly controls communication with the outside world, and a local section, which mainly controls communication with the loop line. The local part of the main station and the local parts of many slave stations are connected by a loop line for each master station, and each slave station communicates with the master station using data carried on the circular token of the loop line, and the master system communicates with the master station by using the data carried on the circular token of the loop line. It is possible to switch between a relay mode that has a slave system that performs relaying, and a terminal mode that has a main system that communicates with the master station using one loop line and a terminal mode that also relays the other loop line. In a remote monitoring and control device that switches the mode of a slave station to obtain contact with a master station when a continuous failure occurs and when the failure location is recovered, a signal is sent to the local unit of each station to call the host unit. and a transmitting/receiving section that receives a response signal from the host section, and an abnormality monitoring section that determines whether there is an abnormality in the host section based on the response signal received by the transmitting/receiving section, and the abnormality monitoring section detects whether there is an abnormality. An abnormality communication method for a remote monitoring and control device, characterized in that, when a determination is made, all transmission of token signals and other signals from the abnormal station is prohibited.