JP5152426B1 - Information processing apparatus, redundancy system, and error detection method therefor - Google Patents

Abstract

It is possible to suppress sensitivity when detecting disconnection of a communication path.
In an information processing apparatus such as a gateway device having at least arithmetic processing means and communication means, a load detection means for detecting a load factor of the arithmetic processing means and a response signal received from the communication destination by the communication means When the load factor detected by the load detection means 31a and 32a and the load detection means 35 exceeds the set value for high load determination, the disconnection is detected. Disconnection detection sensitivity suppression units 31b and 32b that control the units 31a and 32a to suppress disconnection detection sensitivity. Thus, when the arithmetic processing means such as the CPU is in a high load state, various control functions and error detection functions are made compatible while suppressing error detection sensitivity, and erroneous detection of errors is prevented.
[Selection] Figure 1

Description

  The present invention relates to an information processing apparatus having a function of suppressing error detection processing at the time of high load of an arithmetic processing means, a redundant system including a plurality of the information processing apparatuses, and a disconnection of a communication path in these It relates to a method for detecting errors.

Patent Document 1 relays communication between a plurality of electronic control units connected between the first and second buses constituting the in-vehicle LAN and connected to each bus via a pair of branch lines. Each of the electronic control units (including the electronic control unit built in the gateway device) includes a transmission data time interval measuring means and a transmission time interval. Communication failure determination means for storing communication failure due to exceeding the threshold value, and one-side disconnection detection function for storing the transmission line interval information of the branch lines by comparing the transmission time interval total value of a plurality of electronic control units with the one-side disconnection determination value Are described.
The time interval measuring means is configured to reset the counter every time transmission of the electronic control unit is confirmed, and to count up the counter when transmission from the electronic control unit is unconfirmed. Therefore, in the above-described prior art, if the unconfirmed time of transmission from the electronic control unit continues for a predetermined time, the counter value continues to increase, and communication failure is detected when the counter value reaches the threshold value.

  On the other hand, in Patent Documents 2 and 3, even when the control device connected to the transfer device and controlling the packet transfer processing is in a high load state, by switching to another control device with a sufficient load, It is described that the reliability of the entire system is improved by distributing the load of the control device without causing delay or timeout of the path control processing.

  For example, FIG. 7 is a configuration diagram of a packet transfer system described in Patent Document 2, in which 100 is a monitoring manager, 210 and 220 are control devices, and 310 and 320 are transfer devices that transfer packets to the control devices 210 and 220. Is shown. The control devices 210 and 220 are configured to be connectable to the transfer devices 310 and 320. For example, the control device 210 communicates via the control protocol session CPS when connected to the transfer devices 310 and 320.

In the above configuration, the monitoring manager 100 is for monitoring the load state of the control devices 210 and 220, and the configuration is as shown in FIG.
In FIG. 8, the communication unit 110 communicates with the control devices 210 and 220. The comparison unit 120 compares the load information of the control devices 210 and 220 with a load reference value to determine a high load state. The storage unit 160 stores operation information (routing information and control information) 161 and 162 of the control devices 210 and 220.

When it is determined that the control device is in a high load state as a result of the comparison by the comparison unit 120, the activation instruction unit 130 reads operation information of the control device and other control devices from the storage unit 160, and performs other control. An activation instruction for the apparatus and operation information of the control apparatus are transmitted to the communication unit 110.
The connection instruction unit 140 sends a connection instruction to the transfer apparatuses 310 and 320 via the communication unit 110 in order to execute connection with another control apparatus instructed by the activation instruction unit 130. The stop instruction unit 150 sends a stop instruction to the control device that is determined to be in a high load state by the comparison unit 120 to the control device via the communication unit 110.

Although not shown, the control devices 210 and 220 shown in FIG. 7 include a communication unit that communicates with the monitoring manager 100 and the transfer devices 310 and 320, and a load that measures the CPU usage rate and power consumption at regular intervals. A measurement unit and a control unit for controlling the transfer devices 310 and 320 are provided.
The transfer devices 310 and 320 include a communication unit that communicates with the control devices 210 and 220, a transfer processing unit that transfers packets, a packet input unit and a packet output unit that are connected to the control devices 210 and 220, and the like. Each has.

  In Patent Document 3, as in Patent Document 2 described above, in a packet transfer system including a monitoring manager and a plurality of control devices and transfer devices, the monitoring manager detects a high load state of the control device. A configuration for switching the connection to another control device is disclosed.

Japanese Patent Laying-Open No. 2010-93676 (paragraphs [0017] to [0051], FIGS. 1 to 6 etc.) Japanese Patent Laying-Open No. 2010-45502 (paragraphs [0017] to [0047], FIG. 1, FIG. 2, etc.) Japanese Patent Laying-Open No. 2010-45503 (paragraphs [0015] to [0043], FIG. 1, FIG. 2, etc.)

In recent years, information processing apparatuses such as personal computers are in a situation where the complexity of software cannot be denied to meet various demands, and sometimes the CPU load becomes very high when executing the software.
When such a high load occurs, an event of waiting for processing of software (task) occurs. Therefore, when the above-described counter reset processing is executed by software, the processing is waited. Since the counter counts up even in this waiting state, if the counter value reaches the threshold value while the counter reset process is waiting, there is a problem of erroneously detecting a communication failure.
In order to prevent such erroneous detection, it may be possible to register the determination threshold for communication failure with a margin when the load on the CPU is high. The communication failure detection response at the time of operation will be deteriorated, and an unexpected failure may occur.
On the other hand, according to the related arts disclosed in Patent Documents 2 and 3, it is possible to distribute the load of the control device in a high load state to other control devices to level the load. However, since a stop instruction is transmitted from the monitoring manager to a control device in a high load state, the control device stops its operation, so that this function is effective when the control device has a disconnection detection function, for example. There is a problem that it cannot be used.

  Also, in these conventional technologies, when a redundant system consisting of an active system and a standby system is configured by a plurality of gateway devices and control devices, an error such as disconnection in the communication path of one device does not occur. Nevertheless, this may be erroneously detected. In this case, there is a problem that switching between the active system and the standby system frequently occurs between a plurality of devices.

  Therefore, an object of the present invention is to perform processing for suppressing error detection sensitivity when an arithmetic processing means such as a CPU is in a high load state, and to make various control functions and error detection functions compatible with each other. It is an object to provide an information processing apparatus and a redundant system, and an error detection method in these systems.

In order to solve the above problems, an information processing apparatus according to claim 1 is an information processing apparatus including at least an arithmetic processing unit and a communication unit.
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects an error in the communication destination or the communication path by continuing a non-reception time of a response signal from the communication destination communicating via the communication means for a predetermined time;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the detection sensitivity of the error when a load factor detected by the load detection unit is equal to or higher than a set value for high load determination. Features.

An information processing apparatus according to claim 2 is the information processing apparatus according to claim 1,
The error detection unit
It is configured to measure a time when the response signal is not received, and to detect the error when the measured value reaches a predetermined threshold value,
The error detection sensitivity suppression unit is
The measurement value or the threshold value is changed so that the measurement value does not reach the threshold value when the load factor detected by the load detection unit becomes equal to or higher than the set value for high load determination.

An information processing apparatus according to claim 3 is the information processing apparatus according to claim 1,
The error detection unit
Counting means for counting a time when the response signal is not received;
Means for detecting the error when the count value by the counting means reaches a predetermined threshold,
The error detection sensitivity suppression unit is
When the load factor detected by the load detection unit becomes equal to or higher than the set value for high load determination, an error detection output from the error detection unit is masked.

The information processing apparatus according to claim 4 is the information processing apparatus according to any one of claims 1 to 3,
The information processing apparatus is connected between a first communication path and a second communication path, and transmits and receives between a device connected to the first communication path and a device connected to the second communication path. It is characterized by being configured as a device for converting data to be converted into each other.

An error detection method in an information processing apparatus according to claim 5 is an error detection method in an information processing apparatus including at least an arithmetic processing unit and a communication unit.
The information processing apparatus detects the load factor of the arithmetic processing means and allows the communication destination or the communication path to continue for a predetermined time after a response signal from the communication destination that communicates via the communication means is not received. The error detection sensitivity is suppressed when the load factor of the arithmetic processing unit becomes equal to or higher than a high load determination set value.

The error detection method in the information processing apparatus according to claim 6 is the error detection method according to claim 5,
The error is detected when a count value corresponding to a non-reception time of the response signal reaches a predetermined threshold value.

In the redundant system according to claim 7, a plurality of information processing devices including at least an arithmetic processing unit and a communication unit are connected in parallel, with one information processing device as an active system and another information processing device as a standby system. In the redundancy system to be operated, the redundancy system in which the active information processing device is switched to the standby information processing device when an error in the communication path of the active information processing device is detected.
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects the error by continuing a predetermined time of a non-reception time of a response signal from a communication destination communicating via the communication unit;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when the load factor detected by the load detection unit is equal to or higher than a high load determination set value. It is characterized by.

The redundant system according to claim 8 is the redundant system according to claim 7,
The load factor detected by the load detecting means includes a load generated in association with device diagnosis information exchange processing by an active information processing apparatus and a standby information processing apparatus.

The redundant system according to claim 9 is the redundant system according to claim 7 or 8,
The information processing apparatus is connected between a first communication path and a second communication path, and transmits and receives between a device connected to the first communication path and a device connected to the second communication path. It is characterized by being configured as a device for converting data to be converted into each other.

In the redundant system according to claim 10, a plurality of information processing apparatuses including at least an arithmetic processing unit and a communication unit are connected in parallel between the first communication path and the second communication path, and the first communication Data exchanged between a device connected to the path and a device connected to the second communication path is mutually converted, and one information processing apparatus is used as an active system and another information processing apparatus is used as a standby system. In a redundancy system that operates as a standby system, when an error in the communication path of the active information processing apparatus is detected, the active information processing apparatus is switched to a standby information processing apparatus.
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects the error by continuing a predetermined time of a non-reception time of a response signal from a communication destination communicating via the communication unit;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when the load factor detected by the load detection unit is equal to or higher than a set value for high load determination;
With
Wherein said load factor detected by the load detecting means, characterized in that it comprises a load generated with the scramble processing device diagnostic information by the operating system of the information processing apparatus and the standby system of the information processing apparatus.

In the redundancy system according to claim 11, a plurality of information processing apparatuses including at least an arithmetic processing unit and a communication unit are connected in parallel between the first communication path and the second communication path, and the first communication Data exchanged between a device connected to the path and a device connected to the second communication path is mutually converted, and one information processing apparatus is used as an active system and another information processing apparatus is used as a standby system. In a redundancy system that operates as a standby system, when an error in the communication path of the active information processing apparatus is detected, the active information processing apparatus is switched to a standby information processing apparatus.
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects the error by continuing a predetermined time of a non-reception time of a response signal from a communication destination communicating via the communication unit;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when the load factor detected by the load detection unit is equal to or higher than a set value for high load determination; and
The error detection unit
Counting means for counting a time when the response signal has not been received, and means for detecting the error when a count value by the counting means reaches a predetermined threshold,
The error detection sensitivity suppression unit is
A load factor that is detected by the load detection means and includes a load that occurs in association with device diagnosis information between the active information processing apparatus and the standby information processing apparatus is equal to or higher than the set value for high load determination The threshold value is changed to a value larger than the current value when the value becomes.

In the redundant system according to claim 12, a plurality of information processing apparatuses including at least an arithmetic processing unit and a communication unit are connected in parallel between the first communication path and the second communication path, and the first communication Data exchanged between a device connected to the path and a device connected to the second communication path is mutually converted, and one information processing apparatus is used as an active system and another information processing apparatus is used as a standby system. In a redundancy system that operates as a standby system, when an error in the communication path of the active information processing apparatus is detected, the active information processing apparatus is switched to a standby information processing apparatus.
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects the error by continuing a predetermined time of a non-reception time of a response signal from a communication destination communicating via the communication unit;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when the load factor detected by the load detection unit is equal to or higher than a set value for high load determination; and
The error detection unit
Counting means for counting a time when the response signal has not been received, and means for detecting the error when a count value by the counting means reaches a predetermined threshold,
The error detection sensitivity suppression unit is
A load factor that is detected by the load detection means and includes a load that occurs in association with device diagnosis information between the active information processing apparatus and the standby information processing apparatus is equal to or higher than the set value for high load determination In this case, the error detection output from the error detection unit is masked.

According to a thirteenth aspect of the present invention, there is provided a method for detecting an error in a redundant system, wherein a plurality of information processing devices including at least an arithmetic processing unit and a communication unit are connected in parallel, and one information processing device is connected to an operating system and other information A redundancy system for operating a processing device as a standby system, wherein the active information processing device is switched to a standby information processing device when an error in the communication path of the active information processing device is detected. In the error detection method in the computer system,
The active information processing apparatus detects the load factor of the arithmetic processing unit, and continues the non-reception time of the response signal from the communication destination communicating via the communication unit for a predetermined time. An error is detected, and the detection sensitivity of the error is suppressed when the load factor of the arithmetic processing unit becomes equal to or higher than a set value for high load determination.

An information processing apparatus according to claim 14 is an information processing apparatus comprising at least arithmetic processing means and communication means.
Load detection means for detecting a load factor of the arithmetic processing means;
The response signal from the communication destination that communicates via the communication unit is not received, and the time during which the load factor detected by the load detection unit is less than the set value for high load determination continues for a predetermined time. An error detection unit for detecting an error in the communication destination or the communication path;
When the load factor detected by the load detection means is not less than the set value for high load determination without receiving the response signal, the error detection unit is controlled to suppress the error detection sensitivity. And an error detection sensitivity suppression unit.

An error detection method in an information processing apparatus according to claim 15 is an error detection method in an information processing apparatus including at least an arithmetic processing unit and a communication unit.
The information processing apparatus detects a load factor of the arithmetic processing unit, does not receive a response signal from a communication destination communicating through the communication unit, and the load factor of the arithmetic processing unit is high An error in the communication destination or the communication path is detected by continuing a time that is less than the set value for determination for a predetermined time, the response signal is not received, and the load factor of the arithmetic processing unit is for high load determination It is characterized in that the error detection sensitivity is suppressed when the value exceeds a set value.

In the redundancy system according to claim 16, a plurality of information processing devices including at least arithmetic processing means and communication means are connected in parallel, with one information processing device as an active system and another information processing device as a standby system. In the redundancy system to be operated, the redundancy system in which the active information processing device is switched to the standby information processing device when an error in the communication path of the active information processing device is detected.
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
The response signal from the communication destination that communicates via the communication unit is not received, and the time during which the load factor detected by the load detection unit is less than the set value for high load determination continues for a predetermined time. An error detection unit for detecting an error in the communication destination or the communication path;
When the load factor detected by the load detection means is not less than the set value for high load determination without receiving the response signal, the error detection unit is controlled to suppress the error detection sensitivity. And an error detection sensitivity suppression unit.

The error detection method in the redundant system according to claim 17 is such that a plurality of information processing devices including at least an arithmetic processing means and a communication means are connected in parallel, and one information processing device is connected to an active system and other information processing devices. A redundancy system that operates the apparatus as a standby system, and the redundancy system is configured to switch the active information processing apparatus to a standby information processing apparatus when an error in the communication path of the active information processing apparatus is detected. In the method for detecting the error in the system,
The active information processing apparatus detects the load factor of the arithmetic processing unit, does not receive a response signal from a communication destination communicating via the communication unit, and the load factor of the arithmetic processing unit is An error in the communication destination or the communication path is detected by continuing a time that is less than the set value for high load determination for a predetermined time, the response signal is not received, and the load factor of the arithmetic processing unit is high. The error detection sensitivity is suppressed when the load determination set value is exceeded.

The present invention suppresses detection sensitivity while maintaining a function of detecting an error such as a disconnection of a communication path when the arithmetic processing means of the information processing apparatus is in a high load state. Accordingly, the arithmetic processing function and control function inherent to the information processing apparatus can be made compatible with the error detection function, and erroneous detection of an error can be prevented, thereby improving the reliability of the apparatus and the system.
Further, according to the present invention, the burden of hardware and software is small, and the information processing apparatus and the redundant system can be provided at low cost.

It is a block diagram which shows the structure of the gateway apparatus which concerns on embodiment of this invention. It is a block diagram of the redundant system which shows the use condition of embodiment of this invention. It is a flowchart which shows operation | movement of the disconnection detection part in embodiment of this invention. It is a figure which shows an example of the load factor of the arithmetic processing means in the redundancy system of FIG. It is a flowchart which shows operation | movement of the 1st Example of the error detection means in embodiment of this invention. It is a flowchart which shows operation | movement of the 2nd Example of the error detection means in embodiment of this invention. 1 is a configuration diagram of a packet transfer system described in Patent Document 1. FIG. It is a block diagram of the monitoring manager in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration of a gateway device 30 as an information processing device according to the present embodiment. In FIG. 1, 10 is a first data way, 20 is a second data way, a plurality of stations 11 are connected to the first data way 10, and a plurality of controllers 21 are connected to the second data way 20. Is connected. Here, the station 11 is, for example, an operator station to which various commands and data are input by an operator, and the controller 21 transmits and receives various commands and data to and from various sensors and actuators not shown. It has a function to do.

Here, the gateway device 30 of this embodiment is connected between the data ways 10 and 20, relays communication between the data way 10 (station 11) and the data way 20 (controller 21), and converts the communication protocol. It plays a buffer function to absorb the difference in communication speed.
For example, in order to control various devices connected to the controller 21 from the station 11 side, the gateway device 30 communicates by relaying commands and control data for the devices, measurement data / detection data by the devices, and the like. It constitutes an element of the communication system.

  The gateway device 30 includes error detection means 31 and 32 provided corresponding to the data ways 10 and 20, respectively, data conversion means 33 for performing communication protocol conversion, etc., and overall processing and communication processing of the gateway device 30 as a whole. Arithmetic processing means 34 such as a CPU, and load detection means 35 for detecting the load state of the arithmetic processing means 34 are provided.

  The error detection means 31 and 32 are a kind of software whose main part is realized by the arithmetic processing means 34. These error detection means 31 and 32 are, for example, a communication path between the gateway device 30 and the data ways 10 and 20 (or between the data way 10 and the station 11 and between the data way 20 and the controller 21. Disconnection detection units 31a and 32a (also referred to as error detection units) that detect disconnection of each communication path) as an error and transmit an error output to the outside, and disconnection detection sensitivity suppression units 31b and 32b for suppressing disconnection detection sensitivity (Also referred to as an error detection sensitivity suppression unit), details of which will be described later.

FIG. 2 is a configuration diagram of a redundant system (redundant system) showing a use state of this embodiment.
2, 30A and 30B are gateway devices connected in parallel to each other, and the configuration of each of the gateway devices 30A and 30B is the same as that of the gateway device 30 of FIG.
This communication system has two units for switching to a standby gateway device when a gateway device in operation fails or when a communication path between the gateway device and the data ways 10 and 20 is disconnected. It is made redundant by the gateway devices 30A and 30B. As a redundant system, there may be three or more gateway devices.

Next, functions of the error detection means 31 and 32 in FIG. 1 will be described. Since the configuration and function of the error detection means 31 and 32 are the same, the error detection means 32 will be described here as an example.
FIG. 3 is a flowchart showing the operation of the disconnection detection unit 32 a which is a basic function of the error detection unit 32, and is executed by the arithmetic processing unit 34. Here, a case will be described in which a disconnection of the communication path between the gateway device 30 and the dataway 20 is detected as an error.

In FIG. 3, the arithmetic processing means 34 performs a disconnection detection process with a period of 200 ms, for example.
First, for example, “5” is input to the counter as the initial value of the disconnection detection threshold (step S1). The threshold value for disconnection detection can be input by the operator directly into the gateway device 30 using the input means, or from the station 11 or the controller 21, and the value can be arbitrarily set.

Next, the arithmetic processing means 34 determines whether or not a read response or a write response from the controller 21 has been received (step S2), and if received, resets the value of the counter to “5”. The process returns to S1 (step S2 Yes, S6). If the response is not received, “1” is subtracted (decremented) from the counter value (No in step S2, S3).
Then, the processing after step S2 is repeated until the value of the counter becomes “0” (No in step S4), and when the value of the counter becomes “0”, occurrence of disconnection is detected (steps S4 Yes, S5).

  The arithmetic processing means 34 recognizes that the communication path is disconnected when there is no response from the controller 21 for 1 second or more by the above processing, and transmits an error output (disconnection detection output) to the outside. This error output is used, for example, in the redundant system shown in FIG. 2 to switch from an operating gateway device to a standby gateway device.

  Here, even if the disconnection does not actually occur, if the arithmetic processing unit 34 is in a high load state, the response from the controller 21 cannot be processed within a predetermined period, and no response (disconnection). May be recognized. For example, according to the inventor's experiment, when the load factor of the arithmetic processing means 34 is 100%, the response from the controller 21 cannot be recognized for 1 second or longer (in Step S4 Yes of FIG. 3 described above). Correspondingly), it has been confirmed that an error output is generated due to erroneous detection of disconnection, and the switching processing to the standby gateway device is performed. In such a high load state of the arithmetic processing unit 34, in addition to the normal processing of the arithmetic processing unit 34, for example, the process of sharing device diagnostic information between the active gateway device and the standby gateway device overlaps. Occurs when

  FIG. 4 shows an acceleration test with the normal load bottomed up in the redundant system shown in FIG. 2 so that the load factor is close to 100% when the above-described device diagnosis information exchange process occurs. An example of the load factor of the arithmetic processing means 34 is shown. According to FIG. 4, when the error detection means 32 is configured only by the disconnection detection unit 32 a of FIG. 3, the load factor reaches 100% due to the device diagnosis information exchange process, and the disconnection is erroneously detected and It can be seen that switching to the standby system occurs.

  Therefore, in the present embodiment, the disconnection detection sensitivity suppression unit 32b of FIG. 1 is provided as an extended function of the error detection unit 32, and the disconnection detection sensitivity in the high load state of the arithmetic processing unit 34 is reduced, thereby achieving a high load state. This prevents misleading non-response caused by disconnection.

FIG. 5 is a flowchart showing the operation of the present embodiment configured by adding the disconnection detection sensitivity suppression unit 32 b to the disconnection detection unit 32 a of FIG. 3, and corresponds to a first example of the error detection means 32.
Similar to the disconnection detection process, the arithmetic processing unit 34 executes the disconnection detection sensitivity suppression process at a cycle of 200 ms. That is, the load factor of the arithmetic processing unit 34 is detected by the load detection unit 35 of FIG. The set value for high load determination can also be input to the gateway device 30 directly by the operator using the input means or from the station 11 or the controller 21 as in the case of the disconnection detection threshold described above. It can be set arbitrarily.
Next, if the load factor is greater than or equal to the set value, the counter value is reset to the initial value “5” (Yes in step S7, S6), and if the load factor is less than the set value, there is no response to the counter. Processing is performed (step S8).

By adding the disconnection detection sensitivity suppression unit 32b described above, as long as the high-load state of the arithmetic processing unit 34 continues within 1 second, the counter is set before the value of the counter by the disconnection detection unit 32a becomes “0”. (It is assumed here that the high load state of the arithmetic processing unit 34 continues for 1 second at the longest). In other words, when the load factor of the arithmetic processing unit 34 does not reach the high load determination setting value and is within the normal range, the disconnection can be detected within one second after the disconnection occurs. When the arithmetic processing unit 34 is in a high load state, the disconnection is detected at least 2 seconds after the occurrence of the disconnection under the assumption that the high load state is 1 second at the longest as described above. be able to.
As described above, by providing the disconnection detection sensitivity suppression unit 32b that executes steps S7 and S8, the response of disconnection detection at the time of high load is slightly reduced, but the disconnection detection function can be effectively maintained and the disconnection is detected. There is no inconvenience that the active and standby gateway devices are switched in the redundant system due to the erroneous detection output.

Here, the operation of the disconnection detection unit 32a in FIG. 5 (also in FIG. 3) is performed when the counter value is decremented from the initial value when a response signal is not received and a time corresponding to the disconnection detection threshold has elapsed. Although disconnection is detected, the counter value may be incremented from the initial value when a response signal is not received, and the disconnection may be detected when a time corresponding to the disconnection detection threshold has elapsed. Corresponding to the operation of the disconnection detection unit 32a, the disconnection detection sensitivity suppression unit 32b has a function other than resetting the counter value to the initial value when the load factor is equal to or higher than the high load determination set value. The counter value may be changed to a value larger or smaller than the current value.
In any case, when the disconnection detection sensitivity suppression unit 32b determines that the load factor is equal to or higher than the high load determination set value, the time measurement value until the disconnection detection unit 32a detects disconnection is lengthened. By controlling, disconnection detection sensitivity can be suppressed. Further, when it is determined that the load factor is equal to or higher than the set value for high load determination, the disconnection detection output in the disconnection detection unit 32a is masked to set the output to zero (in other words, the disconnection detection sensitivity is set to zero). Thus, the disconnection detection function may be controlled to be temporarily stopped.

Next, FIG. 6 is a flowchart showing a second embodiment of the error detection means in the gateway device 30.
In the second embodiment, step S7 in FIG. 5 is provided between the No branch of step S2 and step S3, and when the load factor of the arithmetic processing means 34 is less than the set value for high load determination, FIG. Similarly, the No branch of step S2 is directly connected to step S3, and when the load factor of the arithmetic processing means 34 is equal to or higher than the high load determination set value, the counter is reset as in FIG. In the above configuration, steps S1, S2, S3 to S5, and S6 correspond to the function of the disconnection detection unit 32a in the first embodiment, and step S7 corresponds to the function of the disconnection detection sensitivity suppression unit 32b.
Also in the second embodiment, there is no possibility that the disconnection detection output is erroneously generated when the arithmetic processing means 34 is heavily loaded.

The present invention includes an information processing apparatus such as the gateway apparatus 30 provided with the error detection means according to the second embodiment, and a redundant system configured by using a plurality of these information processing apparatuses. In particular, in a redundant system, there is no possibility that the active and standby information processing devices are switched by erroneously detecting a disconnection when the arithmetic processing means is heavily loaded.
Furthermore, the same error detection method as that in the first embodiment can be applied to these information processing apparatuses or redundant systems.

As described above, according to this embodiment, the function of the error detection means is relatively simple, the burden of hardware and software is small, and the disconnection detection processing and suppression of disconnection detection sensitivity at high load are reduced at low cost. Processing can be realized.
Of course, the event detected as an error is not limited to the disconnection of the communication path, but may be a failure of the communication partner device (station, controller, etc.) itself.

  The present invention is not limited to a gateway device, and may be a repeater, a router, or the like that performs signal level conversion, and can be used for various information processing devices including arithmetic processing means and communication means, and redundant systems thereof. it can.

10, 20: Data way 11: Station 21: Controller 30, 30A, 30B: Gateway device 31, 32: Error detection means 31a, 32a: Disconnection detection unit 31b, 32b: Disconnection detection sensitivity suppression unit 33: Data conversion unit 34: Arithmetic processing means 35: load detecting means

Claims (17)

In an information processing apparatus including at least arithmetic processing means and communication means,
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects an error in the communication destination or the communication path by continuing a non-reception time of a response signal from the communication destination communicating via the communication means for a predetermined time;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when a load factor detected by the load detection unit is equal to or higher than a set value for high load determination;
An information processing apparatus comprising: The information processing apparatus according to claim 1,
The error detection unit
It is configured to measure a time when the response signal is not received, and to detect the error when the measured value reaches a predetermined threshold value,
The error detection sensitivity suppression unit is
Information processing characterized in that the measured value or the threshold value is changed so that the measured value does not reach the threshold value when the load factor detected by the load detecting means becomes equal to or higher than the set value for high load determination. apparatus. The information processing apparatus according to claim 1,
The error detection unit
Counting means for counting a time when the response signal is not received;
Means for detecting the error when a count value by the counting means reaches a predetermined threshold;
With
The error detection sensitivity suppression unit is
An information processing apparatus for masking an error detection output from the error detection unit when the load factor detected by the load detection unit becomes equal to or higher than the set value for high load determination. The information processing apparatus according to any one of claims 1 to 3,
The information processing apparatus is connected between a first communication path and a second communication path, and transmits and receives between a device connected to the first communication path and a device connected to the second communication path. An information processing apparatus configured to convert data to be converted into each other. In an error detection method in an information processing apparatus including at least an arithmetic processing unit and a communication unit,
The information processing apparatus detects the load factor of the arithmetic processing means and allows the communication destination or the communication path to continue for a predetermined time after a response signal from the communication destination that communicates via the communication means is not received. An error detection method in an information processing apparatus, wherein the error detection sensitivity is suppressed when the load factor of the arithmetic processing unit is equal to or higher than a high load determination set value. In the error detection method in the information processing apparatus according to claim 5,
An error detection method in an information processing apparatus, wherein the error is detected when a count value corresponding to a time when the response signal is not received reaches a predetermined threshold value. A redundant system in which a plurality of information processing devices including at least an arithmetic processing unit and a communication unit are connected in parallel, and one information processing device is operated as an active system and another information processing device as a standby system. In a redundant system that switches the active information processing device to a standby information processing device when an error in the communication path of the information processing device is detected,
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects the error by continuing a predetermined time of a non-reception time of a response signal from a communication destination communicating via the communication unit;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when the load factor detected by the load detection unit is equal to or higher than a set value for high load determination;
A redundant system characterized by comprising: In the redundant system according to claim 7,
The redundancy system characterized in that the load factor detected by the load detection means includes a load generated in association with device diagnosis information exchange processing by an active information processing apparatus and a standby information processing apparatus . In the redundant system according to claim 7 or 8,
The information processing apparatus is connected between a first communication path and a second communication path, and transmits and receives between a device connected to the first communication path and a device connected to the second communication path. A redundant system characterized in that the system is configured as a device for mutually converting data to be converted. A plurality of information processing devices each including at least an arithmetic processing unit and a communication unit are connected in parallel between the first communication path and the second communication path, and the device connected to the first communication path and the second A redundant system that mutually converts data transmitted and received between devices connected to a communication path and operates one information processing apparatus as an active system and another information processing apparatus as a standby system, In a redundant system that switches the active information processing device to a standby information processing device when an error in the communication path of the active information processing device is detected,
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects the error by continuing a predetermined time of a non-reception time of a response signal from a communication destination communicating via the communication unit;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when the load factor detected by the load detection unit is equal to or higher than a set value for high load determination;
With
Redundancy of the load ratio detected by the load detecting means, characterized in that it comprises a load generated with the scramble processing device diagnostic information by the operating system of the information processing apparatus and the standby system of the information processing apparatus system.
A plurality of information processing devices each including at least an arithmetic processing unit and a communication unit are connected in parallel between the first communication path and the second communication path, and the device connected to the first communication path and the second A redundant system that mutually converts data transmitted and received between devices connected to a communication path and operates one information processing apparatus as an active system and another information processing apparatus as a standby system, In a redundant system that switches the active information processing device to a standby information processing device when an error in the communication path of the active information processing device is detected,
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects the error by continuing a predetermined time of a non-reception time of a response signal from a communication destination communicating via the communication unit;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when the load factor detected by the load detection unit is equal to or higher than a set value for high load determination;
With
The error detection unit
Counting means for counting a time when the response signal has not been received, and means for detecting the error when a count value by the counting means reaches a predetermined threshold,
The error detection sensitivity suppression unit is
A load factor that is detected by the load detection means and includes a load that occurs in association with device diagnosis information between the active information processing apparatus and the standby information processing apparatus is equal to or higher than the set value for high load determination The redundancy system is characterized in that the threshold value is changed to a value greater than the current value when A plurality of information processing devices each including at least an arithmetic processing unit and a communication unit are connected in parallel between the first communication path and the second communication path, and the device connected to the first communication path and the second A redundant system that mutually converts data transmitted and received between devices connected to a communication path and operates one information processing apparatus as an active system and another information processing apparatus as a standby system, In a redundant system that switches the active information processing device to a standby information processing device when an error in the communication path of the active information processing device is detected,
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
An error detection unit that detects the error by continuing a predetermined time of a non-reception time of a response signal from a communication destination communicating via the communication unit;
An error detection sensitivity suppression unit that controls the error detection unit to suppress the error detection sensitivity when the load factor detected by the load detection unit is equal to or higher than a set value for high load determination;
With
The error detection unit
Counting means for counting a time when the response signal has not been received, and means for detecting the error when a count value by the counting means reaches a predetermined threshold,
The error detection sensitivity suppression unit is
A load factor that is detected by the load detection means and includes a load that occurs in association with device diagnosis information between the active information processing apparatus and the standby information processing apparatus is equal to or higher than the set value for high load determination The redundancy system is characterized by masking an error detection output by the error detection unit when the error detection time is reached. A redundant system in which a plurality of information processing devices including at least an arithmetic processing unit and a communication unit are connected in parallel, and one information processing device is operated as an active system and another information processing device as a standby system. In the error detection method in the redundant system in which the active information processing device is switched to the standby information processing device when an error in the communication path of the information processing device is detected,
The active information processing apparatus detects the load factor of the arithmetic processing unit, and continues the non-reception time of the response signal from the communication destination communicating via the communication unit for a predetermined time. An error detection method in a redundant system, wherein an error is detected, and the error detection sensitivity is suppressed when the load factor of the arithmetic processing means is equal to or higher than a set value for high load determination. In an information processing apparatus including at least arithmetic processing means and communication means,
Load detection means for detecting a load factor of the arithmetic processing means;
The response signal from the communication destination that communicates via the communication unit is not received, and the time during which the load factor detected by the load detection unit is less than the set value for high load determination continues for a predetermined time. An error detection unit for detecting an error in the communication destination or the communication path;
When the load factor detected by the load detection means is not less than the set value for high load determination without receiving the response signal, the error detection unit is controlled to suppress the error detection sensitivity. An error detection sensitivity suppression unit;
An information processing apparatus comprising: In an error detection method in an information processing apparatus including at least an arithmetic processing unit and a communication unit,
The information processing apparatus detects a load factor of the arithmetic processing unit, does not receive a response signal from a communication destination communicating through the communication unit, and the load factor of the arithmetic processing unit is high An error in the communication destination or the communication path is detected by continuing a time that is less than the set value for determination for a predetermined time, the response signal is not received, and the load factor of the arithmetic processing unit is for high load determination An error detection method in an information processing apparatus, wherein the error detection sensitivity is suppressed when a value exceeds a set value. A redundant system in which a plurality of information processing devices including at least an arithmetic processing unit and a communication unit are connected in parallel, and one information processing device is operated as an active system and another information processing device as a standby system. In a redundant system that switches the active information processing device to a standby information processing device when an error in the communication path of the information processing device is detected,
Each information processing device
Load detection means for detecting a load factor of the arithmetic processing means;
The response signal from the communication destination that communicates via the communication unit is not received, and the time during which the load factor detected by the load detection unit is less than the set value for high load determination continues for a predetermined time. An error detection unit for detecting an error in the communication destination or the communication path;
When the load factor detected by the load detection means is not less than the set value for high load determination without receiving the response signal, the error detection unit is controlled to suppress the error detection sensitivity. An error detection sensitivity suppression unit;
A redundant system characterized by comprising: A redundant system in which a plurality of information processing devices including at least an arithmetic processing unit and a communication unit are connected in parallel, and one information processing device is operated as an active system and another information processing device as a standby system. In the error detection method in the redundant system in which the active information processing device is switched to the standby information processing device when an error in the communication path of the information processing device is detected,
The active information processing apparatus detects the load factor of the arithmetic processing unit, does not receive a response signal from a communication destination communicating via the communication unit, and the load factor of the arithmetic processing unit is An error in the communication destination or the communication path is detected by continuing a time that is less than the set value for high load determination for a predetermined time, the response signal is not received, and the load factor of the arithmetic processing unit is high. An error detection method in a redundant system, wherein the error detection sensitivity is suppressed when a load determination set value is exceeded.

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