JPH0630844U - DP message monitoring device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention detects an error in the local packet processor, or when an error occurs in the system, making it impossible to transmit or receive a frame, and detects this early so that the system can detect the error. When a failure occurs, recover it early. [Structure] The DP message monitoring device 5 monitors a frame transmitted / received by the trunk / blanker device 3, and an abnormality occurs in the local packet processor 1 connected to the trunk / blanker device 3, or an abnormality occurs in the system. When a frame cannot be sent / received due to an error, this is detected early and the serial
The abnormality content is printed out from the printer device 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a DP message monitoring device for monitoring DP messages input / output to / from a local packet processor.

[0002]

[Prior art]

 As a data processing system using a distributed processing computer having a local packet processor, the system shown in FIG. 5 is conventionally known.

A data processing system shown in this figure has a local packet processor (LPP) 101, a distributed processing computer 102 for distributed processing of processing assigned to the system, and the local packet of the distributed processing computer 102. It comprises a trunk blanker device (HTC) 103 connected to the processor 101, and a plurality of data station devices (DS) 104 connected to the trunk blanker device 103.

Then, the frame output from the local packet processor 101 by the trans blancher device 103 is distributed to each data station device 104, or the frame output from each data station device 104 is converted into a local packet. While guiding the processor 101, the processing specified by the distributed processing computer 102 is performed.

[0005]

[Problems to be solved by the device]

 By the way, in such a data processing system, when an abnormality occurs in the local packet processor 101 or some abnormality occurs in the system and it becomes impossible to transmit / receive a frame, it cannot be detected early. There has been a strong demand for the development of a monitoring device that can monitor the communication status.

In view of the above situation, the present invention can detect a DP message early when an abnormality occurs in the local packet processor or some abnormality occurs in the system and the frame cannot be transmitted / received. The purpose is to provide a monitoring device.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, a DP message monitoring device according to the present invention has a data receiving unit for receiving communication data of a local packet processor and a communication data received by the data receiving unit for decoding and presetting the data. Command to determine whether or not the command has been set, and when a command preset by this data determination unit is not detected within a predetermined time, connect to the local packet processor itself or this local packet processor. It is characterized by including an abnormality detection unit that determines that the communication device has an abnormality.

[0008]

[Action]

 In the above structure, the communication data of the local packet processor is received by the data receiving unit, and the communication data received by the data receiving unit is decoded by the data determining unit to determine whether this is a preset command. If the command determined by the data determination unit is not detected within a predetermined time, the abnormality detection unit detects an abnormality on the side of the local packet processor itself or the communication device connected to the local packet processor. Is determined.

[0009]

【Example】

 FIG. 1 is a block diagram showing an example of a data processing system using an embodiment of a DP message monitoring device according to the present invention.

The data processing system shown in FIG. 1 has a local packet processor (LPP) 1, a distributed processing computer 2 for distributed processing of processing assigned to the system, and the local packet processor 1 of the distributed processing computer 2. A trunk / blunter device (HTC) 3 to be connected, a plurality of data station devices (DS) 4 to be connected to the trunk / blanker device 3, and a DP message monitoring device 5 to be connected to the trunk / blanker device 3. A terminal device (for example, J3100GT) 6 connected to the DP message monitoring device 5 and a serial printer device (SP) 7 connected to the terminal device 6.

Then, the frame output from the local packet processor 1 by the trunk / blancher device 3 is distributed to each data station device 4, or the frame output from each of these data station devices 4 is distributed to the local packet processor 1. While performing the processing specified by the distributed processing computer 2. At this time, the DP message monitoring device 5 monitors the frame transmitted / received by the trunk / branching device 3, and the local packet processor 1 has an abnormality, or some abnormality has occurred in the system to transmit / receive the frame. When it becomes impossible to perform the above, this is detected early and the abnormal contents are printed out from the serial printer device 7.

As shown in FIG. 2, the DP message monitoring device 5 comprises an initialization circuit 10, a data link handler circuit 11, a reception buffer circuit 12, a buffer management circuit 13, and a command interpreter circuit 14. When the power is turned on, each part of the device is reset to establish a data link with the local packet processor 1 through the trunk / blanker device 3, and the data is transmitted / received by the local packet processor 1. When the local packet processor 1 receives an existing frame and decodes the communication state of the local packet processor 1 and an error occurs in the local packet processor 1 or some kind of error occurs in the system and it becomes impossible to transmit and receive the frame, this is promptly performed. It is detected and transmitted to the terminal device 6, and the serial printer device 7 The abnormal content is printed out.

The initialization circuit 10 is a circuit that detects when the power of the DP message management device 5 is turned on and generates an initialization signal. The initialization signal 10 outputs the initialization signal to the data link handler circuit 11 and the reception buffer circuit. 12, the buffer management circuit 13, and the command interpreter circuit 14 to initialize these circuits.

The data link handler circuit 11 has preset interface specifications, for example, a two-wire system as a connection line, a coaxial cable, a half-duplex serial transmission as a transmission system, a transmission speed of 250 KBPS, and an HDLC system as a transmission control procedure. (Or SDLC method) is a circuit that executes a function of receiving data from the local packet processor 1. After being initialized by the initialization circuit 10, a data link with the local packet processor 1 is established. Processing for receiving frames transmitted / received by the local packet processor 1, checking the frames received by this reception processing to determine whether the local packet processor 1 has a fault, detection of power off of the data station device 4, etc. Command processing The registration processing of the game is performed.

Further, the reception buffer circuit 12 is a circuit mainly used as a storage location of data received by the data link handler circuit 11, and is initialized by the initialization circuit 10 and then the data link handler. The received data from the local packet processor 1 fetched by the circuit 11 is stored.

The buffer management circuit 13 is a circuit for delivering the reception data stored in the reception buffer circuit 12 to the command interpreter circuit 14. The buffer management circuit 13 is initialized by the initialization circuit 10 and then the command Based on a command from the interpreter circuit 14, a command frame stored in the reception buffer circuit 12 is extracted and delivered to the command interpreter circuit 14, or a command output from the command interpreter circuit 14 Based on the above, the command frame stored in the reception buffer circuit 12 is released.

The command interpreter circuit 14 has a preset interface specification, for example, RS-232C as a control procedure, 4W half-duplex as a transmission method, 9600 BPS as a transmission rate, and a terminal device 6 as a start-stop synchronization method as a synchronization method. It is a circuit for performing communication processing and processing for interpreting and executing the command message registered in the reception buffer circuit 12 by the data link handler circuit 11, and the command message is set in advance. Command, for example, an I command indicating an information frame of the local packet processor 1, an RR command indicating invitation (polling), and an output from the local packet processor 1 to initialize the data station device 4. Is it a SNRM command If these commands are not received within a preset time, the terminal device 6 is notified that polling has stopped. Further, when the SNRM command of the above commands does not come, it is judged that the power of the data station device 4 to be monitored is off, and the terminal device 6 is notified of this.

Next, the operation of this embodiment will be described with reference to the flowcharts shown in FIGS. 3 and 4.

First, when the power of the DP message management device 5 is turned on, the data link handler circuit 11 is initialized by the initialization circuit 10 constituting the DP message management device 5 (step ST 1), and the command interpreter is also used. After the circuit 14 is initialized (step ST2), programming of the microprocessor (for example, Z-80 manufactured by Zylog Co., Ltd.) that performs the communication processing of the DP message management device 5 is performed (step ST3).

As a result, when the preparation for reception is completed (step ST4), the buffer management circuit 13 and the command interpreter circuit 14 are set up and the reception process is started (step ST5).

Then, every time a frame is received by the data link handler circuit 11, this is registered in the receive buffer circuit 12, and the frame registered in the receive buffer circuit 12 by the buffer management circuit 13 is stored. A command which is delivered to the command interpreter circuit 14 and in which the command message in the frame is set in advance, for example, an I command indicating that it is an information frame of the local packet processor 1, an RR command indicating transmission invitation (polling) , It is checked whether or not the SNRM command is output from the local packet processor 1 to initialize the data station device 4 (step ST10).

Then, when these I command, RR command, and SNRM command are not received within a preset time, a message indicating that this is detected by the command interpreter circuit 14 and polling has stopped is displayed. It is generated (step ST12), supplied to the terminal device 6 and printed out from the serial printer device 7 (step ST13).

Further, when the SNRM command of the above commands does not come (step ST10), the power of the data station device 4 to be monitored by the command interpreter circuit 14 is off. A determination is made and a message indicating this is generated (step ST12), which is supplied to the terminal device 6 and printed out from the serial printer device 7 (step ST13).

If the frame registered in the reception buffer circuit 12 is a normal command (step ST11), this is interpreted and executed (step ST13).

As described above, in this embodiment, the frame transmitted / received by the trunk / blancer device 3 is monitored, and an abnormality occurs in the local packet processor 1 or an abnormality occurs in the system, so that transmission / reception of the frame is performed. When it becomes impossible to do so, the error is detected early and the abnormal contents are printed out from the serial printer device 7. Therefore, an error occurs in the local packet processor 1 or some error occurs in the system. When a frame cannot be transmitted or received, it can be detected early, and when a system failure occurs, it can be recovered early.

[0026]

[Effect of device]

 As described above, according to the present invention, when an abnormality occurs in the local packet processor or some abnormality occurs in the system and it becomes impossible to transmit / receive a frame, this can be detected early. If a system failure occurs due to this, it can be quickly recovered.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a data processing system using an embodiment of a DP message monitoring device according to the present invention.

FIG. 2 is a block diagram showing a detailed circuit example of the DP message monitoring device shown in FIG.

FIG. 3 is a flowchart showing an operation example of the DP message monitoring device shown in FIG.

FIG. 4 is a flowchart showing an operation example of the DP message monitoring device shown in FIG.

FIG. 5 is a block diagram showing an example of a data processing system using a distributed processing computer having a local packet processor.

[Explanation of symbols]

1 Local Packet Processor 2 Distributed Processing Computer 3 Trunk / Blancher Device 4 Data Station Device (Communication Equipment) 5 DP Message Monitoring Device 6 Terminal Device 7 Serial Printer Device 10 Initialization Circuit 11 Data Link Handler Circuit (Data Reception Unit) 12 Reception Buffer circuit 13 Buffer management circuit 14 Command interpreter circuit (data judgment unit, abnormality detection unit)

Claims (1)

[Scope of utility model registration request] 1. A data receiving unit for receiving communication data of a local packet processor, and a data determining unit for decoding the communication data received by the data receiving unit and determining whether or not this is a preset command. An abnormality detection unit that determines that the local packet processor itself or the communication device side connected to the local packet processor when the command set in advance by the data determination unit is not detected within a predetermined time, A DP message monitoring device characterized by being provided.