JPH07193588A - Abnormally diagnosis processor for terminal equipment connectable to lan system - Google Patents

Abstract

PURPOSE:To recognize whether abnormality exists in a self equipment or the other terminal equipment, to detach the self equipment from the communication line of a system so as to release an occupied state as against a communication line and to secure the appropriate operation of the other terminal equipment when abnormality exists in the self equipment by providing a control means changing over a switch means to time and a cut state, which are previously set, when abnormality is detected. CONSTITUTION:When the transmission buffer 31 of the self equipment 2 breaks down in a transmission state as it is, for example, an abnormality detection means 33 remains outputting a transmission recognition signal. A timer part 34 outputs an abnormal signal and opens the switch 37. Then, an interruption signal is outputted and a password is eliminated. Thus, an opening signal is outputted from a password storage logic part 35 and the output of a transmission permission signal is stopped. Thus, the switch 37 is locked to an opening state and a transmission control signal to the transmission buffer 31 is switched to a high level. Since the opening state of the switch 37 is held in such a way, the occupation of the communication line 1 by the self equipment 2 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality diagnosis processing apparatus capable of suitably dealing with a trouble such as an abnormality or a failure occurring in a terminal in a system in a terminal connectable to a so-called LAN system.

[0002]

2. Description of the Related Art Conventionally, a so-called LAN system in which a plurality of terminals are connected via a communication line is known.
And each terminal is a microcomputer
The built-in system allows the system to function with versatility by performing required arithmetic processing on received data and transmitting the arithmetic result to other required terminals. Each terminal constituting such a LAN system is provided with a transmission / reception buffer to enable various data communication with other terminals via a communication line, and these buffers are transmitted and received. Data can be reliably transmitted / received by suitably switching the state depending on the time. The state switching of the buffer is performed by a control signal from the microcomputer of the terminal.

[0003]

In a LAN system, when communication hardware or a microcomputer of a terminal device goes out of control and keeps transmitting data to a communication line that is shared and used, the communication line becomes abnormal. However, there is a problem in that the entire system does not function because it is occupied by a machine, another terminal device cannot use the communication line. Further, if the transmission buffer is abnormal or malfunctions and the control signal from the microcomputer cannot be accepted, the communication line is occupied as described above. Although it is necessary to urgently take countermeasures against such an abnormality, conventionally, use had to be interrupted until repair work was performed by a repair worker.

The present invention has been made in view of the above,
When an abnormality occurs in the data transmission state on the communication circuit, the abnormality diagnosis is performed to recognize whether the abnormality is the self-device or another terminal,
Furthermore, if it is an abnormality of its own machine, it can be disconnected from the system communication line to release the occupied state for the communication line and ensure proper operation of other terminals to minimize the failure of the entire system. It is an object of the present invention to provide an abnormality diagnosis processing device for a terminal that can be connected to a LAN system.

[0005]

According to the present invention, in a terminal unit with a built-in microcomputer, which is connectable to a LAN system, can perform an operation on received data and can transmit an operation result, a connection part to a communication line is provided. An intervening switch means for connecting and disconnecting the communication line, a transmission buffer interposed between the output part of the microcomputer and the switch means, and a reception interposed between the output side of the transmission buffer and the input part of the microcomputer. A buffer, a first abnormality detecting means for detecting an abnormality in a data transmission state from a data input state to the receiving buffer, and an abnormality detected by the abnormality detecting means,
And a first control means for switching the switch means to a disconnection state for a preset time (Claim 1).

Further, after the operation of the first control means, the second abnormality detection means for detecting that the abnormal state continues for a preset time and the second abnormality detection means detect an abnormality. When it is detected, the operation of the transmission buffer is stopped and the second control means for switching the switch means to the disconnection state is provided (Claim 2).

Further, the transmission buffer has code generation means for outputting the permission code, and the buffer operation is permitted while the transmission buffer is outputting the permission code, and the second control means is also provided. Is designed to erase the code in the code generating means (claim 3).

Further, the terminal is adapted to perform data transmission in a time-division manner every predetermined time, and the first abnormality detecting means continues the abnormal state for at least the preset time or more. This is detected (Claim 4).

[0009]

According to the first aspect of the present invention, this terminal has a built-in microcomputer, and the LA and LA via the transmission and reception buffers.
When connected to the N system, the received data from another device is calculated and the calculation result is transmitted. The first abnormality detecting means detects an abnormality in the data transmission state from the data input state to the reception buffer, turns off the switch means for a set time, and disconnects the self-device from the system. After the elapse of the set time, the system is returned to the inside of the system again, whereby the operation of detecting the abnormal state by the first abnormality detecting means is enabled.

According to the second aspect of the invention, when the second abnormality detecting means detects that the abnormal state continues for a preset time after the operation of the first control means,
Assuming that the own device is abnormal, the operation of the transmission buffer is stopped and the switch means is switched to the disconnection state, whereby the own device is removed from the system.

According to the third aspect of the present invention, the buffer operation is permitted while the permission code is being output to the transmission buffer. However, when an abnormality is detected by the second abnormality detection means, the second The control means erases the code in the code generating means, and thereby the transmission buffer operation is surely stopped.

According to the fourth aspect of the present invention, the terminal device transmits the data in a time-division manner for each predetermined time, and the first abnormality detecting means determines that the abnormal state is at least the predetermined time which is the time-division time. Detects that it has continued for the set time.

[0013]

FIG. 3 is a diagram showing a so-called LAN system constructed by a terminal device having an abnormality diagnosis processing device according to the present invention. The terminal device 2 includes a terminal processing unit 20 and a communication control unit 300. The terminal processing unit 20 includes a data processing unit 21 for performing data processing, a keyboard 22 for inputting data and the like, and a monitor 23 for displaying the processing content. Or, it is equipped by being mounted, and the data transmission via the communication line 1 is performed by using the communication control unit 30. The terminal 2 can be applied to a computer device that needs to build a LAN system, for example, a personal computer network in an office, a cash register in a store, and other multi-game devices.

The multi-game device is effective for a multi-play game in which a plurality of people simultaneously perform a car race or the like using a required number of video game devices, and each of the video game devices as terminal devices can be operated by a car. Operation members are prepared, the operation data of this operation member is processed by the built-in microcomputer, and the operation data of other video game machines are received, and the simulated race cars of all are displayed on the monitor of the own machine. It is designed to be displayed at a position based on, and a simulated race can be realized in this way.

FIG. 1 shows a block configuration of the terminal processing unit 20 and the communication control unit 30. The data processing unit 21 of the terminal processing unit 20 is composed of a microcomputer (hereinafter, referred to as a microcomputer), performs a predetermined calculation or processing on input data using an internal program, and a password, a transmission status signal, a reception A control signal such as a status signal is output to the communication control unit 30. This password is input from the keyboard 22, and the transmission status signal is used when sending the transmission data to the communication line 1, and the reception status signal is used when receiving the data on the line from the communication line 1. Is output.

Each terminal 2 is adapted to periodically transmit and receive data in a time division manner, and therefore the communication state is
It consists of three states: transmission, reception, and pauses in between.

The communication control section 30 includes a data processing section 21.
Buffer 31 for outputting the transmission data from the communication line 1 to the communication line 1, reception buffer 32 for guiding the reception data to the data processing unit 21, abnormality detection means 33 for detecting an abnormality in the communication state from the data transmission state, and a timer unit. 34, a password storage logic unit 35, a transmission buffer control unit 36 that controls the data output of the transmission buffer 31, a switch 37 that connects and disconnects the terminal 2 and the communication line 1, and an insulating unit 38 that performs DC insulation of a transformer and the like. ing. The transmission buffer 31 and the reception buffer 32 share the signal line L1.

Further, FIG. 2 shows the transmission buffer 31 in (a).
And (b) shows the electric elements constituting the reception buffer 32, which are called differential transmission / reception buffers.

The transmission buffer 31 has a D
Tenb (enable signal: hereinafter referred to as control signal) is low level, and data (differential data) is output with positive and negative logic, and the communication line 1 performs data transmission using this differential data. , Improving the transmission quality. When DTenb is set to high level, the output side becomes Hi.
It is controlled to the Z (high impedance) state, and the rest state is generated.

The electric element shown in FIG. 2B is for converting the differential data guided to the input side into the original digital signal, and the receiving buffer 32 uses this electric element to process the received data into the data processing section 21. And a signal for identifying the high impedance state of the transmission buffer 31 is output. Then, the change to the high impedance is recognized by the abnormality detecting means 33 as a rest state. That is, in the reception buffer 32, as is well known, two electric elements in FIG. 2B are connected in parallel (one is directly connected to the data processing unit 21), and the input line is connected in reverse polarity. Has been done. The respective polar sides are connected to each other through a high resistance to positive and negative predetermined voltages, and are connected to each other in a pull-up or pull-down state. As a result, when transmission data is input and a current flows, it is output to each output terminal with different polarities of high and low, but in the high impedance dormant state, the same level is output from both output terminals. ing. The abnormality detecting means 33 detects the rest state from the output states of the both output terminals.

The abnormality detecting means 33 detects an abnormality from the transmission state and the rest state during transmission and reception. In this embodiment, the abnormality in the data transmission state is detected by the presence or absence of the data signal on the signal line L1. To do. Presence or absence of data signal is 2
The presence of the discontinuity of the value data makes it possible to detect that it is in the data transmission state. The abnormality detecting means 33 outputs a transmission confirmation signal to the data processing section 21 and the timer section 34 only while data is present on the signal line L1. Therefore, when the data transmission is normally performed, the transmission confirmation signal is input to the data processing unit 21 and the timer unit 34 at a predetermined cycle for a predetermined time that is time-divided.

The timer unit 34 counts the existence time of the data signal, and measures the duration of the abnormal state. The timer unit 34 is configured to measure a time T1 that is at least longer than the transmission / reception time for each cycle and a predetermined time T2 (> T1) that is longer than the time T1. In the idle state, the reference numeral 34 stops the time counting operation, and resets and starts by the transmission confirmation signal. Then, the time measured is time T1
When it becomes longer, the abnormal signal is output from the terminal P1 to the switch 37. Further, the timer unit 34 outputs a cutoff signal from the terminal P2 to the password storage logic unit 35 when the transmission confirmation signal continues beyond the time T2.

The password storage logic unit 35 and the transmission buffer control unit 36 control the transmission buffer 31 and the switch 37 based on the control signal from the data processing unit 21 and the cutoff signal from the terminal P2 of the timer unit 34. Is. The password storage logic unit 35 keeps the transmission buffer control unit 3 only while the password signal is being input from the terminal processing unit 20.
6 outputs the transmission permission signal to the switch 3 and
A closing signal is output to 7. When the control signal is input from the data processing unit 21 while the transmission permission signal is input, the transmission buffer control unit 36 outputs a low level control signal, that is, the transmission control signal, to the control terminal of the transmission buffer 31. Then, the transmission buffer 31 is set to the operating state.

The switch 37 disconnects the terminal 2 from the communication line 1 when a trouble such as an abnormality or a failure occurs in the terminal 2, and is composed of, for example, a semiconductor switch or an electromagnetic relay. Although an open / close signal is also input to the switch 37 from the data processing unit 21, the abnormal signal from the timer unit 34 and the open signal from the password storage logic unit 35 are set to be prioritized.

Next, the operation of the above structure will be described. First, when power is supplied to the terminal device 2, the count value of the timer unit 34 is reset to 0 by a reset circuit (not shown). By resetting the timer unit 34, the timer unit 34
Outputs a cancellation signal to reset the password in the password storage logic unit 35, and this reset causes the password storage logic unit 35 to output an opening signal and stop outputting the transmission permission signal. And the switch 37 is opened.

When the transmission buffer 31 is deactivated, the abnormality detecting means 33 stops sending the transmission confirmation signal, and the timer section 34 is cleared. As a result, the output of the abnormal signal and the interruption signal from the timer unit 34 is stopped, and the password can be set in the password storage logic unit 35. Then, when the data processing unit 21 outputs the password, this password is set in the password storage logic unit 35. Therefore, the password storage logic unit 35 outputs the closing signal and also outputs the transmission permission signal to close the switch 37, and the transmission buffer control unit 36 outputs the low-level control signal.

By the above operation, the control preparation of the communication control unit 30 is completed, the terminal 2 is interposed in the system, and the data transmission between the terminal 2 and the communication line 1 becomes possible.

When the switch 37 is closed and the reception cycle is reached, the data processing section 21 outputs a reception control signal,
The receive buffer 32 is activated. When the transmission data is received from another terminal, the abnormality detection means 33 outputs a transmission confirmation signal, whereby the timer unit 34 is reset and the time counting is started. In this case, the reception cycle ends and the system shifts to the idle state before the count value reaches T1, so that the transmission confirmation signal is not output and the timer stops the count operation.

When the transmission state is entered after the suspension state, the data processing unit 21 outputs a control signal to the transmission buffer control unit 36, and the transmission buffer control unit 36 confirms the output of the transmission permission signal of the password storage logic unit 35. Then, a transmission control signal is output and the transmission buffer 31 is put into operation. When the transmission data is transmitted to the communication line 1, the abnormality detection means 33 outputs a transmission confirmation signal, whereby the timer unit 34 is reset and the time counting is started. In this case, since the transmission cycle ends and the state shifts to the idle state before the time count value reaches T1, the transmission confirmation signal is not output and the timer stops the time count operation. In this way, normal data transmission is continued.

Next, in the case where an abnormality occurs in the system, the abnormality diagnosis processing operation will be described in the following three modes. Abnormality mode 1 (when an abnormality or failure occurs in another terminal) The reception buffer 32 is in the reception state, and transmission data is input from the communication line 1 through the switch 37 in the closed state. The abnormality detecting means 33 outputs a transmission confirmation signal when the reception buffer 32 is switched to the reception state and the transmission data is input. The timer unit 34 measures the duration of this transmission confirmation signal, and this measured value is the time T
When it exceeds 1, an abnormal signal is output, and first, the switch 37 is opened preferentially to disconnect the terminal processing unit 20, the communication control unit 30 side and the communication line 1.

When transmission data is no longer input to the reception buffer 32 due to disconnection from the communication line 1 and the system shifts to the idle state, the abnormality detection means 33 stops transmitting the transmission confirmation signal, whereby the timer section 34 is reset. Switch 37 to return to the closed state, while the data processing unit 21 is interrupted because the transmission of the transmission confirmation signal is stopped at T1 time longer than the predetermined time division time,
This interruption confirms that an abnormality, failure, or the like has occurred in a terminal device other than the own device. Data processing unit 2
At this time, 1 executes at least the interruption processing of the data communication for the time T2 when the other terminal is disconnected from the system, and performs the allowance processing such that the data calculation by the own terminal is not hindered.

Abnormality Mode 2 (When a Runaway Abnormality Occurs in the Microcomputer of the Own Machine) The timer unit 34 uses the switch 3 in the abnormal mode 1 described above.
Even if the switch 7 is opened, if the input state of the data signal to the receiving buffer 32 is continued, the transmission confirmation signal from the abnormality detecting means 33, which is subsequently output, causes the timing operation with the switch 37 kept open. continue. When the timer unit 34 measures the time T2, the timer unit 34 outputs a cutoff signal to erase the password in the password storage logic unit 35. Then, the password storage logic unit 35 outputs the open signal to lock the open state of the switch, and outputs the transmission permission signal to set the control signal from the transmission buffer control unit 36 to the high level. Therefore, when the transmission data is no longer output from the transmission buffer 31, the abnormality detection means 33 confirms the idle state and clears the timer section 34. However, at this time, since the password in the password storage logic unit 35 has been erased, the apparatus is not operated by the system until the password is newly input from the data processing unit 21, that is, the microcomputer which has returned to the normal state or has been replaced. The separated state is maintained, so that other terminals in the system can maintain normal operation as usual.

Abnormality Mode 3 (When Abnormality or Failure Occurs in Transmission Buffer 31 of Own Machine) When the transmission buffer 31 fails in the transmitting state, the terminal 2 operates as follows. The abnormality detecting means 33 continues to output the transmission confirmation signal, and the timer section 34 outputs the abnormality signal to open the switch 37, and then outputs the cutoff signal to erase the password. The open signal is output from 35 and the output of the transmission permission signal is stopped.

Therefore, the switch 37 is locked in the open state, and the transmission control signal to the transmission buffer 31 is switched to the high level. On the other hand, the transmission buffer 31
Does not switch to the non-operational state due to the trouble, but since the open state of the switch 37 is maintained,
The communication line 1 is prevented from being occupied by.

[0035]

As described above, according to the invention described in claim 1, when the abnormality detecting means detects an abnormality, the first control means switches the switch means to the disconnection state for a preset time. Since it is equipped with, it is possible to recognize whether the cause of the abnormality is its own device or another terminal device.

According to the second aspect of the present invention, the second abnormality detecting means for detecting that the abnormal state continues for a preset time after the operation of the first control means, and the second abnormality detecting means. When the abnormality detecting means of No. 2 detects an abnormality, it has a second control means for stopping the operation of the transmission buffer and switching the switching means to the disconnection state. It is possible to disconnect the device from the communication line of the system, release the occupied state of the communication line, and ensure proper operation of other terminals to minimize the failure of the entire system.

According to the third aspect of the present invention, there is provided code generating means for outputting the permission code, and the buffer operation is permitted while the transmission buffer is outputting the permission code. At the same time, the second control means erases the code in the code generation means, so that the abnormal self-machine can be reliably disconnected from the system.

According to the invention as set forth in claim 4, in the device in which the terminal transmits the data in a time-division manner for each predetermined time, the first abnormality detecting means is in an abnormal state for at least the predetermined time. Since it is detected that the operation has continued for the above set time, the configuration of the abnormality detection circuit can be simplified.

[Brief description of drawings]

FIG. 1 is a block diagram of a terminal processing unit 20 and a communication control unit 30 to which an abnormality diagnosis device according to the present invention is applied.

FIG. 2 is a diagram showing a configuration of a transmission / reception buffer, in which (a) shows an electric element constituting a transmission buffer and (b) shows an electric element constituting a reception buffer.

FIG. 3 is a diagram showing a connection state of each terminal that constructs a LAN system.

[Explanation of symbols]

 1 Communication Line 2 Terminal 20 Terminal Processing Section 21 Data Processing Section 22 Keyboard 23 Monitor 30 Communication Control Section 31 Transmission Buffer 32 Reception Buffer 33 Abnormality Detection Means 34 Timer Section 35 Password Storage Logic Section 36 Transmission Buffer Control Section 37 Switch

Claims (4)

[Claims] 1. A terminal, which is connectable to a LAN system and which calculates received data and transmits a calculation result, has a microcomputer built-in terminal which is interposed at a connection portion with the communication line and connected with the communication line. Switch means for disconnecting,
A transmission buffer interposed between the output section of the microcomputer and the switch means, a reception buffer interposed between the output side of the transmission buffer and the input section of the microcomputer, and a data transmission state from the data input state to the reception buffer. And a first control means for switching the switch means to a disconnection state for a preset time when the abnormality is detected by the abnormality detection means. An abnormality diagnosis processing device for a terminal that can be connected to a LAN system. 2. A second abnormality detecting means for detecting that the abnormal state continues for a preset time after the operation of the first control means, and an abnormality of the second abnormality detecting means. 2. A terminal connectable to a LAN system according to claim 1, further comprising: second control means for stopping the operation of the transmission buffer and detecting the switch means in a disconnection state when the detection is made. Machine abnormality diagnosis processing device. 3. The abnormality diagnosis processing device for a terminal connectable to the LAN system according to claim 2, further comprising code generating means for outputting a permission code, and the transmission buffer is provided while the permission code is being output. Buffer operation is permitted, and the second control means is adapted to erase the code in the code generating means, which is connectable to a LAN system. Abnormality processing unit for mobile terminals. 4. The terminal is adapted to perform data transmission in a time-division manner every predetermined time, and the first abnormality detecting means continues the abnormal state at least for a set time of the predetermined time or more. The abnormality diagnosis processing device for a terminal connectable to the LAN system according to claim 1, wherein the abnormality diagnosis processing device detects the fact.