JP5826122B2 - Communications system - Google Patents

Description

  According to the present invention, in a communication system that performs communication from a plurality of controllers to a computer at a fixed period, when a trouble of temporary communication stoppage occurs, a faulty part can be specified.

  A conventional communication system includes a computer, an application for displaying data collected from each controller, data collected from each controller, communication M / W (abbreviated as communication middleware, hereinafter the same) and , Software for controlling the communication LSI and LSI for performing communication. Controller data is held in each of the plurality of controllers. These are connected by a network. Each controller transmits data held by itself to a computer at regular intervals, and the computer can display the controller data collected from the controller. Conventionally, when a temporary communication stop occurs, even if the log is recorded, the log recording is continued. However, since the log area is limited and the log may be overwritten, the log at the time of abnormality may not be confirmed. In addition, regarding network abnormalities, it takes a very long time to isolate a fault because an analyzer is connected to check the network status.

  Therefore, as a method for isolating the cause of the abnormality on the network, there is a method of detecting an abnormality by transmitting a health check packet and switching the transmission path (see, for example, Patent Document 1).

JP 2003-18217 A

  In a conventional communication system where data is transmitted at a fixed period, in the case of a temporary communication stoppage trouble, it is possible to specify whether there is a problem on the transmission side, the network, or the reception side. Hard to do. In addition, since data may be recovered by data transmission in the next cycle or the next cycle, failure analysis becomes difficult. Furthermore, there is a problem that software such as communication M / W and application is related, and fault isolation becomes complicated.

  The present invention has been made to solve the above-described problems, and in a communication system in a network in which data is transmitted at a fixed period, when a temporary communication trouble occurs, an abnormal part is isolated. An object of the present invention is to provide a communication system that can be used.

The communication system of this invention is
In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
When detecting the stop of the communication of the data to the application unit, the log information in which the stop is detected is stored in the log storage area unit and the log information stored in the log storage area unit is extracted. And a stop detection mechanism.
Communications system.

The communication system of the present invention
In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
When communication of the data to the application unit detects recovery from a stop, the log information that detects the recovery from the stop is stored in the log storage region unit, and each log information is extracted from the log storage region unit And a communication stop detection mechanism unit.

The communication system of the present invention
In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
If the communication of the data to the application unit is stopped, or the communication of the data to the application unit detects at least one of recovery from the stop, at least one of the stop or recovery from the stop A log stop detection mechanism for extracting log information from the log storage area and extracting the log information from the log storage area.

The communication system of this invention is
In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
When detecting the stop of the communication of the data to the application unit, the log information in which the stop is detected is stored in the log storage area unit and the log information stored in the log storage area unit is extracted. Because it has a stop detection mechanism,
In the event of a temporary communication trouble, it becomes possible to isolate the abnormal part.

The communication system of the present invention
In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
When communication of the data to the application unit detects recovery from a stop, the log information that detects the recovery from the stop is stored in the log storage region unit, and each log information is extracted from the log storage region unit Communication stop detection mechanism
In the event of a temporary communication trouble, it becomes possible to isolate the abnormal part.

The communication system of the present invention
In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
If the communication of the data to the application unit is stopped, or the communication of the data to the application unit detects at least one of recovery from the stop, at least one of the stop or recovery from the stop Since the log information that detects one is stored in the log storage area unit and the communication stop detection mechanism unit that extracts each log information from the log storage area unit,
In the event of a temporary communication trouble, it becomes possible to isolate the abnormal part.

It is a figure which shows the structure of the communication system of Embodiment 1 of this invention. It is a figure which shows the structure of the communication stop detection mechanism part of the communication system shown in FIG. FIG. 2 is a diagram illustrating a storage state of log information and a configuration of log information in the communication system illustrated in FIG. 1. It is a figure which shows the structure of the management table in the communication stop detection mechanism part shown in FIG. It is a figure which shows the structure of the data frame of the controller in the communication system shown in FIG. It is a flowchart which shows addition of the monitoring setting in the communication system shown in FIG. It is a flowchart which shows deletion of the monitoring setting in the communication system shown in FIG. 3 is a flowchart for explaining the operation of the communication system shown in FIG. 1. FIG. 2 is a diagram illustrating a configuration of log information of a LAN driver unit in the communication system illustrated in FIG. 1. It is a figure which shows the structure of the log information of the communication middleware part in the communication system shown in FIG. It is a figure which shows the structure of the log information of the communication stop detection mechanism part in the communication system shown in FIG. It is a figure which shows the structure of the communication system of Embodiment 2 of this invention. It is a figure which shows the definition file in the communication system shown in FIG. It is a figure which shows the structure of the communication system of Embodiment 3 of this invention. It is a figure which shows the live check object setting definition file in the communication system shown in FIG. It is a figure which shows the structure of the log information in the communication system shown in FIG. It is a figure which shows the structure of the communication system of Embodiment 4 of this invention. It is a figure which shows the structure of the communication system of Embodiment 5 of this invention. It is a figure which shows the structure of the communication system of Embodiment 5 of this invention.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. 1 is a diagram showing a configuration of a communication system according to Embodiment 1 of the present invention, FIG. 2 is a diagram showing a configuration of a communication stop detection mechanism unit of the communication system shown in FIG. 1, and FIG. 3 is a communication shown in FIG. FIG. 4 is a diagram showing a storage state of log information and a configuration of log information in the system, FIG. 4 is a diagram showing a configuration of a management table in the communication stop detection mechanism unit shown in FIG. 2, and FIG. 5 is a controller in the communication system shown in FIG. FIG. 6 is a flowchart showing addition of monitoring settings in the communication system shown in FIG. 1, FIG. 7 is a flowchart showing deletion of monitoring settings in the communication system shown in FIG. 1, and FIG. FIG. 9 is a flowchart for explaining the operation of the communication system shown in FIG. 1, FIG. 9 is a diagram showing a configuration of log information of the LAN driver unit in the communication system shown in FIG. Diagram illustrating the configuration of a log information of the communication middleware unit in the communication system shown in FIG. 1, FIG. 11 is a diagram showing a configuration of a log information of the communication stop detection device in the communication system shown in FIG.

  In the figure, a plurality of controllers 2 and a computer 1 that processes each data 2 a held by these controllers 2 are connected via a network 3. The computer 1 includes a communication LSI unit 1e for inputting each data 2a from each controller 2, a LAN driver unit 1d as a communication software unit having communication software for controlling the communication LSI unit 1e, and the LAN driver. A communication middleware unit 1c (hereinafter referred to as a communication M / W unit 1c) as a communication software unit having communication software for communicating each data 2a via the unit 1d, and each data 2a ( The application unit 1a having application software for displaying (collected data 1b), for example, display, and a log storage area unit 1g for recording log information of each software on the computer 1.

  The log storage area 1g is finite, and the number of items that can be registered in advance is determined. For example, assuming that 100 items can be registered, when the number of registered items exceeds 100, the old logs are overwritten in order (written cyclically). Further, the log information stored in the log storage area 1g is composed of time information, software identifiers, and detailed information as shown in FIG. For example, the software identifier is set to “1” for the LAN driver, “2” for the communication M / W, and “3” for the communication stop detection mechanism. It can be judged whether it was created by software. Further, as detailed information, for example, “Record received frame” for a LAN driver, “Record operating state” for a communication M / W, and “Communication stop detection mechanism”. , “Record communication stop / recovery status”. Details of each content will be described later.

  Furthermore, at least one of the stop of the communication of the data communicated to the application unit 1a or the stop or the recovery from the stop when the communication of the data to the application unit 1a detects at least one of the recovery from the stop Is stored in the log storage area and each log information is extracted from the log storage area 1g, and the log information extracted from the log storage area 1g by the communication stop detection mechanism 1f And a log saving area 1h for saving the log. In addition, although the log evacuation area | region part 1h showed the example arrange | positioned outside the computer 1, it is not restricted to this, You may make it prepare in the computer 1. FIG. The communication stop detection mechanism unit 1f includes a main processing unit 11, a timer monitoring processing unit 12 that manages and monitors a timer, and a management table unit 13 that stores a management table.

  As shown in FIG. 5, a data frame of data transmitted by each controller 2 (indicating a “reception frame” on the receiving side) is a destination terminal number, a source terminal number, a sequence number, , Transmission time and data. Each terminal number is a number in which a unique number is assigned and set so as to be identifiable with respect to all the computers 1 and each controller 2 connected to the network 3. The sequence number is a number in which an incremented value is set each time the controller 2 transmits data. The transmission time is set to the time when the controller 2 transmits.

  Next, the operation of the communication system according to the first embodiment configured as described above will be described. Each controller 2 transmits data 2 a to the computer 1 through the network 3 at a constant cycle. The fixed cycle time in this transmission is determined in advance by the system. Next, when receiving the data frame of the data 2a of the controller 2 via the communication LSI unit 1e, the LAN driver unit 1d records the contents of the received frame together with time information in the log storage area unit 1g as log information (FIG. 1). B-1: Log recording of received frames). Along with this, the received frame is passed to the communication M / W unit 1c. Next, the communication M / W unit 1c records the received frame contents and time information as log information in the log storage area unit 1g (B-2 in FIG. 1: received frame log recording).

  The log information is recorded in a unified format as shown in FIG. Further, as examples of specific log information recorded here, as shown in FIGS. 9 and 10, as time information, software identifier, and detailed information, trace point identifier, transmission destination terminal number, transmission source terminal number , Sequence number, transmission time, part of data, etc. are recorded. As the trace point identifier of the LAN driver log, for example, “1” is set for the frame reception timing, and “2” is set for the data transfer timing to the communication M / W. The trace point identifier in the operation status log of the communication M / W is, for example, “1” if it is a reception timing point from the LAN driver, and “2” if it is a timing point for passing data to the communication stop detection mechanism. Each identifier is set as follows.

  And the application part 1a has set beforehand the transmission source terminal number and fixed period of a monitoring object frame as shown in FIG. 4 with respect to the management table part 13 of the communication stop detection mechanism part 1f ( FIG. 1A: monitoring setting). The management table unit 13 is set to monitor the transmission source terminal number and the transmission cycle, and register the timer status for each. In the timer state, “being activated” is a monitoring target and indicates a state in which the timer is started. Moreover, “not activated” indicates a state that is not a monitoring target. In addition, the timeout is a monitoring target and indicates a state in which communication stop is detected.

  This monitoring setting method will be described. First, a case where monitoring is requested will be described with reference to FIG. The application unit 1a requests the monitoring target frame setting process to the main processing unit 11 of the communication stop detection mechanism unit 1f (step S21 in FIG. 6). Next, the main processing unit 11 refers to the management table unit 13 (X-0 in FIG. 2: addition / deletion of management table, step S22 in FIG. 6), and whether or not the transmission source terminal number for monitoring is entered. Is determined (step S23 in FIG. 6). If the entry has been completed, the process ends. If no entry has been made, the main processing unit 11 performs a timer start process (starting up) for the timer monitoring process unit 12 (X-1 in FIG. 2: timer start process, step S24 in FIG. 6). . Then, the main processing unit 11 sets the transmission source terminal number monitored in the management table unit 13, the transmission cycle (timeout detection time), and the timer monitoring processing unit 12 sets the timer state to “active” (X in FIG. 2). -4: Timer state update process, step S25 in FIG. For example, when the transmission source terminal number 20 is added as a monitoring target from the state of the management table unit 13 as shown in FIG. 4A, the transmission source terminal number is 20, as shown in FIG. The period is set to 100 and the timer state is activated, and is set in the management table unit 13.

  The case of deleting monitoring will be described with reference to FIG. The application unit 1a requests the main processing unit 11 of the communication stop detection mechanism unit 1f to delete the monitoring target frame (step S31 in FIG. 7). Next, the main processing unit 11 refers to the management table unit 13 (X-0 in FIG. 2: addition / deletion of management table, step S32 in FIG. 7), and whether or not the transmission source terminal number for deleting monitoring is entered. Is determined (step S33 in FIG. 7). If no entry has been made, the process ends. If the entry has been made, the timer is canceled (not activated) for the timer monitoring processor 12 (step S34 in FIG. 7). Then, the setting of the transmission source terminal number, transmission cycle (timeout detection time), and timer state for which monitoring is deleted is deleted from the management table unit 13 (step S35 in FIG. 7). For example, when the transmission source terminal number 20 is deleted from the monitoring target from the state of the management table unit 13 as shown in FIG. 4B, it corresponds to the transmission source terminal number 20 as shown in FIG. The transmission cycle, the timer state, etc. are set in the management table unit 13 from which the information has been deleted.

  In this way, after the application unit 1a performs monitoring setting in the management table in the communication stop detection mechanism unit 1f (for example, FIG. 4B), the communication stop detection mechanism unit 1f waits for a received frame (FIG. 8). Step S2). If the monitored reception frame is not received, the timer monitoring processing unit 12 detects a timeout, and the timer state of the management table is updated to timeout (X-3 in FIG. 2: timeout notification processing, for example, If the source terminal number 20 is timed out, the timer state is updated as shown in FIG. When a timeout is detected, the communication stop detection mechanism unit 1f stores communication stop log information, for example, log information as shown in FIG. 11 in the log storage area 1g (C: stop / stop in FIG. 1). Recovery log recording, step S10 in FIG.

  According to FIG. 11, the log information of the communication stop detection mechanism unit 1f includes time information, software identifier, log type as detailed information, terminal number, transmission cycle, and the like. The software identifier is set to 3 as a communication stop detection mechanism, and the log type is set to “1” for stop and “2” for recovery. Since the communication is stopped here, 1 is set as the log type, and it can be distinguished whether the log information of the communication stop detection mechanism unit 1f is due to stop or due to recovery. Next, the communication stop detection mechanism section 1f stores all log information stored in the log storage area 1g in the log save area section 1h (D in FIG. 1: saves at the timing of stop detection, step in FIG. 8). S11), the process returns to step S2.

  When the communication stop detection mechanism unit 1f obtains the reception frame of the data 2a from each controller 2 in step S2, the transmission source terminal number of the reception frame is entered in the transmission source terminal number of the management table unit 13. It is determined whether it is a monitoring object by determining whether it is (step S3 of FIG. 8). When it is determined that the received frame is not a monitoring target (not entered in the management table unit 13), the received frame is notified to the application unit 1a (step S6 in FIG. 8). Further, when it is determined to be a monitoring target (entry to the management table unit 13), the timer monitoring processing unit 12 is notified and the timer state of the management table unit 13 is determined. If the timer state is activated and registered in the management table unit 13, the activated timer is reset and restarted by the timer identifier registered in the management table unit 13 (see FIG. 2). X-2: Timer cancel process, X-4: Timer state update process, step S7) in FIG.

  If the timer state is timed out, it is determined that the data communication has been recovered from the stop, and the communication stop detection mechanism unit 1f displays the log information of the communication recovery, for example, as shown in FIG. 1g (C in FIG. 1: log recording of stop / recovery, step S8 in FIG. 8). Next, the communication stop detection mechanism 1f stores all log information stored in the log storage area 1g in the log save area 1h (E in FIG. 1: saves at the timing of recovery detection, step in FIG. 8). S9). Next, the timer state of the management table is updated again during activation by the timer monitoring processing unit 12 (X-4 in FIG. 2: timer state update processing, step S5 in FIG. 8), and the process proceeds to step S6.

  In this way, when a phenomenon such as communication stop or communication recovery occurs, log information is analyzed, and when communication is stopped due to data delay, discard, etc. in the computer 1, the sequence number is the order, the transmission time in the frame Etc., and various log analysis can be performed. As a specific example, the following analysis is possible. However, the present invention is not limited to these, and various things can be considered as long as they can be analyzed from log information.

  From the log information extracted and stored in this manner, as an example 1, the time information of the LAN driver shown in FIG. 9 (time information a1 in FIG. 9) and the time of communication M / W shown in FIG. When log information that has a time difference from the information (time information b1 in FIG. 10) is obtained, it is determined that there is a failure in the transfer process between the LAN driver and the communication M / W, and data delay has occurred. can do.

  As Example 2, there is a time difference between the time information of communication M / W (time information b1 in FIG. 10) and the time information of communication stop of the communication stop detection mechanism (time information c1 in FIG. 11). When the log information is obtained, it can be determined that there is a failure in the communication M / W unit 1c and a data delay has occurred.

  Also, as an example 3, when log information is obtained such that the log information of the LAN driver (FIG. 9) is recorded but the log information of the communication M / W is not recorded, the communication M / W It can be determined that the unit 1c has a fault and the received frame has been discarded.

  Further, as Example 4, when log information with missing sequence number is obtained from the log of the LAN driver (sequence number a2 in FIG. 9 is not continuous), there is a failure on the controller side and data has not been transmitted. Judgment can be made. This is based on the premise that the controller side uses a mechanism in which the sequence number is incremented each time transmission is performed.

  Further, as Example 5, the interval of the transmission time (transmission time a3 in FIG. 9) in the LAN driver log is a predetermined periodic interval, but the time information at the time of log recording (time information a1 in FIG. 9) If the interval is longer than that, the controller is correctly transmitting data, but it can be determined that there is a failure on the network and that the data actually arrives at the computer side is delayed.

  According to the first embodiment configured as described above, log information at the time of communication stop / recovery can be easily extracted. Therefore, failure analysis can be performed by analyzing the log information.

  In addition, since each log information extracted by the communication stop detection mechanism unit can be saved in the log saving area unit, the log information can be analyzed without time constraints.

  Moreover, since the communication stop detection mechanism unit includes a definition file unit that stores a definition file for performing monitoring setting of the monitoring target controller, the monitoring target can be freely set.

  In the first embodiment, the case where log information is extracted by detecting either stop of log information or recovery from the stop of log information is shown, but the present invention is not limited to this. The log information can be extracted by detecting only the stop of the log information or only the recovery from the stop of the log information, and can be appropriately set according to the monitoring situation.

Embodiment 2. FIG.
In the first embodiment, the example in which the monitoring target setting, that is, the definition file setting is performed by the application unit 1a has been described. However, the present invention is not limited to this, and in the second embodiment, the definition file unit 13f A case will be described in which the definition file for setting the monitoring target is registered from the outside and can be set freely on the user side. 12 is a diagram showing a configuration of a communication system according to Embodiment 2 of the present invention, and FIG. 13 is a diagram showing a definition file in the communication system shown in FIG. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. For example, the computer 1 includes a definition file unit 1i for storing a definition file for setting a monitoring target from an external user. In the configuration of the communication system in FIG. 12, arrows such as A, B, and C shown based on each operation are omitted except for parts newly added in the present embodiment. This also applies to the following embodiments.

  Next, setting of the definition file of the communication system according to the second embodiment configured as described above will be described. First, the user sets a transmission terminal number to be monitored and a transmission cycle as a definition file as shown in FIG. Next, at startup, the computer 1 reads this definition file into the definition file unit 1i, sets it in the management table unit 13 of the communication stop detection mechanism unit 1f, and starts monitoring. Other steps can be performed in the same manner as in the first embodiment, and description thereof will be omitted as appropriate.

  According to the communication system of the second embodiment configured as described above, the monitoring target can be set from the outside, such as a user, as well as the same effect as the first embodiment. It becomes possible to shorten the time for fault isolation.

Embodiment 3 FIG.
14 is a diagram showing a configuration of a communication system according to Embodiment 3 of the present invention, FIG. 15 is a diagram showing a live check target setting definition file in the communication system shown in FIG. 14, and FIG. 16 is a communication system shown in FIG. It is a figure which shows the structure of the log information in. In the figure, the same parts as those in the above embodiments are denoted by the same reference numerals, and description thereof is omitted. A live check function unit 1j for performing a live check between the computer 1 and each controller 2 is provided. In addition to the definition file as shown in FIG. 15, a live check target setting definition file is set in the definition file section 1i. As the live check target setting definition, a terminal number and a transmission cycle are set.

  Next, the operation of the communication system according to the third embodiment configured as described above will be described. First, the live check function unit 1j refers to a definition file as shown in FIG. 15 and recognizes a terminal having a terminal number to be live checked. Thereafter, a live check packet is transmitted to the controller 2 corresponding to this terminal number. Next, when the controller 2 receives the live check packet, it returns a live check response packet in response thereto. At this time, the time returned by the controller 2 is set in the live check response packet. When a live check error occurs, the live check function unit 1j records log information as shown in FIG. 16 in the log storage area unit 1g. For example, if there is a live check abnormality of all the controllers 2 connected to the network 3 when communication is stopped, it can be determined that there is a problem on the network 3 side. Other steps can be performed in the same manner as in the above embodiments, and the description thereof will be omitted as appropriate.

  According to the communication system of the third embodiment configured as described above, the same effects as those of the above-described embodiments can be obtained. Carving becomes easy.

Embodiment 4 FIG.
FIG. 17 is a diagram showing a configuration of a communication system according to Embodiment 4 of the present invention. In the figure, the same parts as those in the above embodiments are denoted by the same reference numerals, and description thereof is omitted. A log recording trigger setting function unit 1k for setting a trigger relating to log recording is provided. In the fourth embodiment, a case will be described in which recording of log information of software unrelated to a failure is desired to be stopped if a failure specific part can be narrowed down. In order to be able to carry out this, in the fourth embodiment, a trigger condition such as the start of recording or the stop of recording of log information is set.

  Next, the operation of the communication system according to the fourth embodiment configured as described above will be described. First, in order to improve the analysis of the log information, the user sets the log information recording conditions such as starting / stopping recording of log information for each software and recording only data reception from a specific controller 2 (multiple settings are possible). As a trigger condition, the log recording trigger setting function unit 1k is set (M in FIG. 17). Next, the log recording trigger setting function 1k notifies the trigger conditions to each software, the communication stop detection mechanism unit 1f, the live check function unit 1j, the communication M / W unit 1c, and the LAN driver unit 1d (FIG. 17 N). Next, each software, the communication stop detection mechanism unit 1f, the live check function 1j, the communication M / W unit 1c, and the LAN driver unit 1d record log information according to the trigger condition. Other steps can be performed in the same manner as in the above embodiments, and the description thereof will be omitted as appropriate.

  According to the communication system of the fourth embodiment configured as described above, the conditions similar to those of the above-described embodiments can be obtained, and the conditions for recording log information can be flexible. The necessary minimum log information can be recorded, and the analysis of the log information can be improved.

Embodiment 5 FIG.
18 and 19 are diagrams showing the configuration of the communication system according to the fifth embodiment of the present invention. In the figure, the same parts as those in the above embodiments are denoted by the same reference numerals, and description thereof is omitted. A maintenance terminal 4 that is remotely connected to the computer 1 via the network 3 and a maintenance I / F 11 that is provided in the computer 1 and interfaces with the maintenance terminal 4 are provided.

  In the fifth embodiment, for example, a plurality of computers 1 may be connected on the network 3. It takes time and effort to make various settings for each computer 1 each time. For this reason, the maintenance terminal 4 is connected to the network 3. Each computer 1 is provided with a function of maintenance I / F 1 l and can be operated from the maintenance terminal 4. The operations from the maintenance terminal 4 are the contents such as the setting for the log information recording trigger condition and the log information reference shown in the above embodiments.

  Next, the operation of the communication system according to the fifth embodiment configured as described above will be described. First, the maintenance terminal 4 sends trigger setting information to the maintenance I / F 11 of the computer 1 (P in FIG. 18). Receiving it, the maintenance I / F 11 notifies the log recording trigger setting function 1k (Q in FIG. 18). Next, the log recording trigger setting function 1k sets a recording condition for each software (N in FIG. 18). Each software records log information under the set conditions. When log information is collected, a log collection request is made from the maintenance terminal 4 to the maintenance I / F 11 of the computer 1 as shown in FIG. 19 (S in FIG. 19). Next, the maintenance I / F 11 receiving the request reads the log information (T in FIG. 19). At this time, the area for reading the log information can be specified by either the log storage area 1g or the log save area 1h. Next, the maintenance I / F 11 transmits log information to the maintenance terminal 4 through the network 3 (U in FIG. 19). Other steps can be performed in the same manner as in the above embodiments, and the description thereof will be omitted as appropriate.

  According to the communication system of the fifth embodiment configured as described above, the same effects as those of the above-described embodiments can be obtained. In a system in which a plurality of computers are connected on a network, maintenance is performed. Setting from the terminal to the computer is possible, and log information can be collected, so that the operability is further improved and the failure analysis time can be shortened.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

1 computer, 1a application part, 1c communication M / W part,
1d LAN driver part, 1f communication stop detection mechanism part, 1g log storage area part,
1h Log save area part, 1i definition file part, 1j live check function part,
1k Log recording trigger setting function part, 2 controller, 2a data,
3 network, 4 maintenance terminal, 13 management table section.

Claims (9)

In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
When detecting the stop of the communication of the data to the application unit, the log information in which the stop is detected is stored in the log storage area unit and the log information stored in the log storage area unit is extracted. A communication system comprising a stop detection mechanism. In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
When communication of the data to the application unit detects recovery from a stop, the log information that detects the recovery from the stop is stored in the log storage region unit, and each log information is extracted from the log storage region unit And a communication stop detection mechanism unit. In a communication system for communicating data from a plurality of controllers to a computer via a network,
The computer includes an application unit having application software for processing the data;
A plurality of communication software units having communication software for performing communication of the data between the application unit and the network and recording log information;
A log storage area for storing the log information, and
If the communication of the data to the application unit is stopped, or the communication of the data to the application unit detects at least one of recovery from the stop, at least one of the stop or recovery from the stop A communication system comprising a communication stop detection mechanism that stores log information in which one is detected in the log storage area and extracts each log information from the log storage area. The communication system according to any one of claims 1 to 3, further comprising a log save area unit that saves and stores each of the log information extracted by the communication stop detection mechanism unit. The communication system according to any one of claims 1 to 4, wherein the communication stop detection mechanism unit includes a definition file unit that stores a definition file for performing monitoring setting of the controller to be monitored. The communication system according to claim 5, wherein the definition file unit is configured to be able to set the definition file from outside. The communication system according to any one of claims 1 to 6, further comprising a live check function unit that performs a live check between the computer and each of the controllers and stores the result as log information in the log storage area unit. The communication system according to any one of claims 1 to 7, further comprising a log setting unit configured to set a recording condition for each log information. The communication system according to claim 8, wherein the log setting unit is configured to be able to set the recording condition from the outside.

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