CN107959600B - Method for monitoring network communication fault - Google Patents
Method for monitoring network communication fault Download PDFInfo
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- CN107959600B CN107959600B CN201711320251.8A CN201711320251A CN107959600B CN 107959600 B CN107959600 B CN 107959600B CN 201711320251 A CN201711320251 A CN 201711320251A CN 107959600 B CN107959600 B CN 107959600B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/069—Management of faults, events, alarms or notifications using logs of notifications; Post-processing of notifications
Abstract
The invention relates to a technology for monitoring network communication faults. The invention solves the problem that a fault point cannot be found in time due to instantaneous interruption of network communication, and provides a method for monitoring network communication faults, which has the technical scheme key points that: initializing a system; monitoring the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 0, indicating a communication fault, firstly judging whether the value of the flag variable is 0, if so, changing the value of the flag variable into 1, then acquiring system time, and writing the communication state result and the system time into a log file; if the return value of the monitoring function is 1, the communication is normal, at the moment, whether the value of the flag variable is 1 or not is judged, if so, the value of the flag variable is changed into 0, the system time is acquired, and the communication state result and the system time are written into a log file; and judging a fault point according to a communication state result of the HMI client and other terminals preset in the log file and the system time.
Description
Technical Field
The invention relates to a hot rolling production line technology, in particular to a technology for monitoring network communication faults.
Background
In a hot continuous rolling production line, a basic automatic control system forms a relatively independent network. The basic automation control system mainly comprises a plurality of PLCs, HMI servers, a plurality of HMI clients, and network devices (such as switches, optical transceivers, optical fibers, twisted pairs, etc.), and a schematic structural diagram of the basic automation control system is shown in fig. 1.
The PLC is communicated with the HMI server and is mainly used for controlling the action of field equipment to finish production, corresponding control information is issued to the HMI client through the HMI server, and returned data information from the HMI client can be received;
the HMI client communicates with the HMI server and is mainly used for dynamically displaying the running state of the field equipment, providing an operation picture for field operators to modify the process parameters of the equipment, operating and controlling the running of the equipment and the like.
Since the PLC, HMI server, HMI client are physically far apart, they need to be connected by a plurality of network devices, which constitutes an independent production network system, as shown in fig. 1 as a typical production network system:
in an electrical room: the plurality of PLCs are connected to a third switch, and the third switch is connected with a fourth optical transceiver.
In the central machine room: the fourth optical transceiver is connected with the third optical transceiver (connected by optical fibers), the third optical transceiver is connected with the second switch, the second switch is connected with the HMI server and the HMI client (optional), and the second switch is connected with the second optical transceiver.
In the operation chamber: the second optical transceiver is connected to the first optical transceiver (via a fiber connection therebetween), the first optical transceiver is connected to the first switch, and the first switch is connected to the HMI client.
In the actual production process, communication faults often occur, which is directly shown in the way that an operator in an operation room finds a picture 'black screen' on a monitoring picture of an HMI client, namely the HMI client cannot perform data interaction with a PLC, the communication between the HMI client and the PLC is interrupted, the operator cannot monitor the running state of field equipment through the HMI client, the situation is very dangerous, the operator can only produce the steel scrap according to operation experience, and the equipment is possibly damaged greatly.
For example, if the first HMI client has a communication failure and the other clients are normal, the twisted pair line with the failure range between the client body, the first switch, and the client body and the first switch can be locked.
And the troubleshooting of more complex communication faults, such as network communication transient interruption, is quite difficult. The network communication instant interruption means that the communication between one client or two or more clients and the HMI server is disconnected, the communication is automatically recovered within a few seconds to a few minutes, and the time and the frequency of the fault are irregular. Because of 'instantaneous interruption', computer operators on duty do not have enough time to respond, the telephone is received, the on-site communication is automatically recovered without arriving, the fault point cannot be found, and steel scrap and even equipment damage are easily caused if production is carried out in the communication fault time point.
Disclosure of Invention
The invention aims to provide a method for monitoring network communication faults, which solves the problems that at present, because network communication is interrupted momentarily, computer operators on duty do not have enough time to respond, the on-site communication is automatically recovered when a call is received, so that a fault point cannot be found, and steel scrap and even equipment are easily damaged if the on-site communication is carried out in a communication fault time point.
The invention solves the technical problem, and adopts the technical scheme that: a method for monitoring network communication faults is applied to a basic automation control system and is characterized by comprising the following steps:
step 1, running a corresponding development program on a preset HMI client, initializing a system, wherein network equipment of the preset HMI client is normal, the initialization at least comprises the steps of setting the values of all flag variables of the preset HMI client and other terminals to be 0, and then starting a clock control;
step 2, calling a monitoring function to monitor the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 0, indicating that the preset HMI client and other terminals have communication faults, at the moment, firstly judging whether the value of a flag variable corresponding to the preset HMI client and the monitored terminal is 0, if the value of the flag variable is 0, changing the value of the flag variable into 1, then acquiring system time, and calling a log function to write the communication state result and the system time into a log file;
step 3, calling a monitoring function to monitor the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 1, indicating that the communication of the preset HMI client and other terminals is normal, at the moment, firstly judging whether the value of a flag variable corresponding to the preset HMI client and the monitored terminal is 1, if so, changing the value of the flag variable into 0, then acquiring system time, and calling a log function to write the communication state result and the system time into a log file;
and 4, judging a fault point according to a communication state result of the preset HMI client and other terminals in the log file and the system time.
Specifically, in step 1, the scan period of the clock control is 500 milliseconds.
Further, in step 1, the system initialization further includes reading a character string of an IP address in the ini file and setting initial states of the interfaces Button and Label.
Specifically, in step 3, after the communication failure is automatically recovered, the value of the flag variable is 0, and when the next scanning cycle is executed, the log does not need to be written again.
Still further, in the step 1-4, the preset HMI client is a first HMI client of the operation room, and the other terminals include a second HMI client, a third HMI client, a fourth HMI client in the operation room, an HMI server and a fifth HMI client in the central machine room, and a first PLC, a second PLC, and a third PLC in the electrical room.
Specifically, in the step 1-4, when a fault point is judged, as long as the first HMI client communicates with one or more HMI clients in the operating room normally, the first HMI client works normally; as long as the first HMI client has a communication failure with two or more of the HMI clients, it may be preliminarily determined that the first switch has failed; as long as the first HMI client communicates with one or more HMI clients normally, the communication fault of the first HMI client and any other HMI client can be judged to be the HMI client body fault or the network equipment fault between the HMI client and the first switch, and the network equipment between the HMI client and the first switch comprises an interface of the HMI client inserted into the first switch.
Further, in the step 1-4, when a fault point is judged, as long as the first HMI client communicates with one or more terminals in the central machine room normally, the network equipment between the first HMI client and the second switch can work normally; when the first switch works normally, as long as two or more terminals in the first HMI client and the central machine room have communication faults, it can be determined that the network equipment between the first line and the second switch has a fault, where the network equipment between the first line and the second switch includes the first line, the first optical transceiver, the second line, the second optical transceiver, the third line and the second switch; as long as the first HMI client is in normal communication with one or more terminals, the communication fault of the first HMI client and any other terminal in the central machine room is judged to be the terminal fault or the network equipment fault between the terminal and the second switch, and the network equipment between the terminal and the second switch comprises an interface of the terminal inserted into the second switch.
Specifically, in step 1-4, when a fault point is judged, as long as the first HMI client communicates with one or more PLCs in the electrical room normally, the network equipment between the first HMI client and the third switch works normally; when the first switch and the second switch work normally, as long as two or more PLC communication faults exist between the first HMI client and the electrical room, the network equipment between the fourth line and the third switch can be judged to be a fault, and the network equipment between the fourth line and the third switch comprises a fourth line, a third optical transceiver, a fifth line, a fourth optical transceiver, a sixth line and a third switch; and as long as the first HMI client communicates with one or more PLCs in the electrical room normally, the communication fault of the first HMI client and any other PLCs in the electrical room is judged to be the fault of the PLC or the fault of network equipment between the PLC and the third switch, wherein the network equipment between the PLC and the third switch comprises an interface of the PLC inserted into the third switch.
The invention has the advantages that by the method for monitoring the network communication fault, whether the preset HMI client and other terminals have faults or not is judged by the return value of the monitoring function and the value of the flag variable, and the fault point is judged according to the communication state result, the communication state of the field network equipment can be monitored in real time by the computer operator, detailed and accurate records are obtained from the log file, the computer operator can quickly respond according to the records, the unstable or abnormal network equipment of the field work is replaced, the stable and normal operation of the network is ensured, thereby avoiding the steel scrap and equipment damage caused by the network abnormality, particularly the network instantaneous interruption phenomenon, improving the speed and the capability of the computer operator for processing the fault, greatly reducing the time of production accidents, avoiding the steel scrap generated and the time for processing the steel scrap, the on-site equipment is protected, the service life of the equipment is prolonged, and meanwhile, the automation degree is improved.
Drawings
Fig. 1 is a schematic structural diagram of a conventional basic automation control system.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings and embodiments.
The invention relates to a method for monitoring network communication faults, which is applied to a basic automation control system and comprises the following steps:
step 1, running a corresponding development program on a preset HMI client, and initializing a system, wherein the preset HMI client network equipment is normal, the initialization at least comprises the steps of setting the values of all flag variables of the preset HMI client and other terminals to 0, and then starting a clock control;
step 2, calling a monitoring function to monitor the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 0, indicating that the preset HMI client and other terminals have communication faults, at the moment, firstly judging whether the value of a flag variable corresponding to the preset HMI client and the monitored terminal is 0, if the value of the flag variable is 0, changing the value of the flag variable into 1, then acquiring system time, and calling a log function to write the communication state result and the system time into a log file;
step 3, calling a monitoring function to monitor the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 1, indicating that the communication of the preset HMI client and other terminals is normal, at the moment, firstly judging whether the value of a flag variable corresponding to the preset HMI client and the monitored terminal is 1, if so, changing the value of the flag variable into 0, then acquiring system time, and calling a log function to write the communication state result and the system time into a log file;
and 4, judging a fault point according to a communication state result of the preset HMI client and other terminals in the log file and the system time.
Examples
The method for monitoring the network communication fault in the embodiment of the invention is applied to a basic automation control system and comprises the following steps:
step 1, running a corresponding development program on a preset HMI client, and initializing a system, wherein the preset HMI client network equipment is normal, the initialization at least comprises the steps of setting the values of all flag variables of the preset HMI client and other terminals to 0, and then starting a clock control;
step 2, calling a monitoring function to monitor the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 0, indicating that the preset HMI client and other terminals have communication faults, at the moment, firstly judging whether the value of a flag variable corresponding to the preset HMI client and the monitored terminal is 0, if the value of the flag variable is 0, changing the value of the flag variable into 1, then acquiring system time, and calling a log function to write the communication state result and the system time into a log file;
step 3, calling a monitoring function to monitor the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 1, indicating that the communication of the preset HMI client and other terminals is normal, at the moment, firstly judging whether the value of a flag variable corresponding to the preset HMI client and the monitored terminal is 1, if so, changing the value of the flag variable into 0, then acquiring system time, and calling a log function to write the communication state result and the system time into a log file;
and 4, judging a fault point according to a communication state result of the preset HMI client and other terminals in the log file and the system time.
In the method, in the step 1, the scanning period of the clock control is preferably 500 milliseconds, and can also be freely set according to needs, and the system initialization further comprises reading a character string of an IP address in an ini file, setting the initial state of an interface Button, a Label and the like; in step 3, after the communication failure is automatically recovered, the value of the flag variable is 0, and when the next scanning period is executed, the log does not need to be written again.
In the steps 1-4, the preset HMI client is a first HMI client of the operation room, and other terminals comprise a second HMI client, a third HMI client and a fourth HMI client in the operation room, an HMI server and a fifth HMI client in the central machine room, and a first PLC, a second PLC and a third PLC in the electric room.
When a fault point is judged, as long as the first HMI client communicates with one or more HMI clients in the operation room normally, the first HMI client works normally; as long as the first HMI client has a communication failure with two or more of the HMI clients, it may be preliminarily determined that the first switch has failed; as long as the first HMI client communicates with one or more HMI clients normally, the communication fault of the first HMI client and any other HMI client can be judged to be the HMI client body fault or the network equipment fault between the HMI client and the first switch, and the network equipment between the HMI client and the first switch comprises an interface of the HMI client inserted into the first switch.
As long as the first HMI client communicates with one or more terminals in the central machine room normally, the network equipment between the first HMI client and the second switch works normally; when the first switch works normally, as long as two or more terminals in the first HMI client and the central machine room have communication faults, it can be determined that the network equipment between the first line and the second switch has a fault, and the network equipment between the first line and the second switch includes the first line, the first optical transceiver, the second line, the second optical transceiver, the third line and the second switch; as long as the first HMI client is in normal communication with one or more terminals, the communication fault of the first HMI client and any other terminal in the central machine room is judged as the terminal fault or the network equipment fault between the terminal and the second switch, and the network equipment between the terminal and the second switch comprises an interface of the terminal inserted into the second switch.
As long as the first HMI client communicates with one or more PLCs in the electrical room normally, the network equipment between the first HMI client and the third switch works normally; when the first switch and the second switch work normally, as long as two or more PLC communication faults exist between the first HMI client and the electric room, the network equipment between the fourth line and the third switch can be judged to be a fault, and the network equipment between the fourth line and the third switch comprises a fourth line, a third optical transceiver, a fifth line, a fourth optical transceiver, a sixth line and a third switch; and as long as the first HMI client communicates with one or more PLCs in the electrical room normally, the communication fault of the first HMI client and any other PLCs in the electrical room is judged to be the fault of the PLC or the fault of network equipment between the PLC and the third switch, and the network equipment between the PLC and the third switch comprises an interface of the PLC inserted into the third switch.
Claims (7)
1. A method for monitoring network communication faults is applied to a basic automation control system and is characterized by comprising the following steps:
step 1, running a corresponding development program on a preset HMI client, initializing a system, wherein network equipment of the preset HMI client is normal, the initialization at least comprises the steps of setting the values of all flag variables of the preset HMI client and other terminals to be 0, and then starting a clock control;
step 2, calling a monitoring function to monitor the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 0, indicating that the communication between the preset HMI client and other terminals fails, at this time, firstly judging whether the value of a flag variable corresponding to the preset HMI client and the monitored terminal is 0, if so, changing the value of the flag variable into 1, then acquiring system time, and calling a log function to write the communication state result and the system time into a log file;
step 3, calling a monitoring function to monitor the communication state of the preset HMI client and other terminals, if the returned value of the monitoring function is 1, indicating that the communication between the preset HMI client and other terminals is normal, at the moment, firstly judging whether the value of a flag variable corresponding to the preset HMI client and the monitored terminal is 1, if so, changing the value of the flag variable into 0, then acquiring system time, and calling a log function to write the communication state result and the system time into a log file;
step 4, judging a fault point according to a communication state result of the preset HMI client and other terminals in the log file and the system time;
the basic automation control system comprises an operation room, a central machine room and an electrical room; the operation room comprises a first HMI client, a second HMI client, a third HMI client, a fourth HMI client, a first switch and a first optical transceiver; the first HMI client, the second HMI client, the third HMI client and the fourth HMI client are connected with a first switch; the first switch is connected with a first optical transceiver;
the central machine room comprises an HMI server, a second optical transceiver, a fifth HMI client, a second switch and a third optical transceiver; the HMI server, the second optical transceiver and the fifth HMI client are connected with the second switch; the second switch is connected with a third optical transceiver; the second optical transceiver is also connected with the first optical transceiver in the operating room;
the electrical room comprises a fourth optical transceiver, a third switch, a first PLC, a second PLC and a third PLC; the fourth optical transceiver is connected with the third switch and is connected with the third optical transceiver in the central machine room; the third switch is connected with the first PLC, the second PLC and the third PLC; a connection line between the first switch and the first optical transceiver is a first line; a connecting line between the first optical transceiver and the second optical transceiver is a second line; a connection line between the second optical transceiver and the second switch is a third line; a connection line between the second switch and the third optical transceiver is a fourth line; a connection line between the third optical transceiver and the fourth optical transceiver is a fifth line; a connection line between the fourth optical transceiver and the third switch is a sixth line;
the preset HMI client is a first HMI client of the operation room, and the other terminals comprise a second HMI client, a third HMI client and a fourth HMI client in the operation room, an HMI server and a fifth HMI client in the central machine room, and a first PLC, a second PLC and a third PLC in the electric room.
2. The method for monitoring network communication faults according to claim 1, wherein in the step 1, the scanning period of the clock control is 500 milliseconds.
3. The method according to claim 1, wherein in step 1, the system initialization further comprises reading the string of the IP address in the ini file and setting the initial state of the interfaces Button and Label.
4. The method for monitoring network communication failure according to claim 1, wherein in step 3, after the communication failure is automatically recovered, the flag variable has a value of 0, and when the next scanning cycle is executed, the log does not need to be written again.
5. The method for monitoring the network communication fault according to any one of claims 1 to 4, wherein in the step 1 to 4, when the fault point is judged, as long as the first HMI client and one or more HMI clients in the operation room are in normal communication, the first HMI client is ensured to work normally; as long as the first HMI client has a communication failure with two or more of the HMI clients, it may be preliminarily determined that the first switch has failed; as long as the first HMI client communicates with one or more HMI clients normally, the communication fault of the first HMI client and any other HMI client can be judged to be the HMI client body fault or the network equipment fault between the HMI client and the first switch, and the network equipment between the HMI client and the first switch comprises an interface of the HMI client inserted into the first switch.
6. The method for monitoring the network communication fault according to any one of claims 1 to 4, wherein in the step 1 to 4, when a fault point is judged, as long as the first HMI client communicates with one or more terminals in the central machine room normally, the network equipment between the first HMI client and the second exchanger always works normally; when the first switch works normally, as long as two or more terminals in the first HMI client and the central machine room have communication faults, it can be determined that the network equipment between the first line and the second switch has a fault, where the network equipment between the first line and the second switch includes the first line, the first optical transceiver, the second line, the second optical transceiver, the third line and the second switch; as long as the first HMI client is in normal communication with one or more terminals, the communication fault of the first HMI client and any other terminal in the central machine room is judged to be the terminal fault or the network equipment fault between the terminal and the second switch, and the network equipment between the terminal and the second switch comprises an interface of the terminal inserted into the second switch.
7. The method for monitoring the network communication fault according to any one of claims 1 to 4, wherein in the step 1 to 4, when the fault point is judged, as long as the first HMI client communicates with one or more PLCs in the electrical room normally, the network equipment between the first HMI client and the third exchanger can work normally; when the first switch and the second switch work normally, as long as two or more PLC communication faults exist between the first HMI client and the electrical room, the network equipment between the fourth line and the third switch can be judged to be a fault, and the network equipment between the fourth line and the third switch comprises a fourth line, a third optical transceiver, a fifth line, a fourth optical transceiver, a sixth line and a third switch; and as long as the first HMI client communicates with one or more PLCs in the electrical room normally, the communication fault of the first HMI client and any other PLCs in the electrical room is judged to be the fault of the PLC or the fault of network equipment between the PLC and the third switch, wherein the network equipment between the PLC and the third switch comprises an interface of the PLC inserted into the third switch.
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