JPS58103250A - Data communication controller - Google Patents

Abstract

PURPOSE:To individually check a driver and a receiver when a communication controller has a fault, by producing a test signal onto a system bus from a test signal producing part via a cable driver for communication and then receiving the test signal at the cable receiver to decide the quality of the controller at a deciding part. CONSTITUTION:Plural data communication controllers are connected to a diagnosis setting command line B1 and to an ordinary bus line B2 such as a data line, an address line. Then a control part 101, a communication cable driver 200, a communication cable receiver 201, etc. are provided to each data communication controller. Furthermore, each data communication controller is provided with a diagnosis setting command part 104, generating parts 103 and 102 for diagnosis pulses 0 and 1, respectively, a diagnosis command driver 301, a diagnosis command receiver 301, a gate 303 and a deciding part 202. The test signal is produced on the line B2 via the driver 200 and with a diagnosis command given from a CPU100. This test signal is received at the receiver 201 to decide the quality of the data communication controllers at the part 202. Thus it is possible to check each driver 200 and receiver 201 in case the data communication controller is faulty.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data communication control device used in a multi-data communication system, and more particularly to an improvement in rounding that facilitates checking the normality of drivers and receivers.

In a conventional multi-data communication system in which multiple data communication control devices of this kind are connected to a system bus, the host data communication control device runs a diagnostic program to check the normality of the cable driver and receiver of the communication control device. is executed, and diagnosis is performed by returning commands to each data communication control device. Therefore, due to a failure of the non-diagnostic data 6 control i41 device, etc.
If a harmful interference signal is being output to the system bus, for example if a high level continues to be output on the bus, the disadvantage is that it is not possible to diagnose individual communication control devices7. Furthermore, even when the cable driver or receiver of a post communication control device is out of order, it is impossible to diagnose other data communication control devices.

The purpose of the present invention is to solve the above-mentioned conventional drawbacks and to check the normality of the cable driver and receiver of each communication control device regardless of the failure of other communication control devices. We are committed to providing a data communication control device that enables this.

The control device of the present invention connects an A-trusted cable driver and a communication cable lever connected to the /stem bus, and other devices via the communication cable driver and communication cable lever and the system path. In a data communication control device that is equipped with a control unit that sends and receives signals, a diagnostic setting command unit that generates a diagnostic command signal, a test signal generation unit that generates a test signal, and a control unit that transmits the diagnostic command signal to a specific system bus line. a diagnostic command driver that sends out signals to the system bus line, a diagnostic command receiver that receives signals from the specific system bus line, and a gate connected to the diagnostic command receiver that is always open and that closes in response to the diagnostic command signal;
a judgment section for detecting a match between the input signal of the communication cable driver and the output No. 1g of the communication cable receiver; It is configured to stop the supply of operating power to the cable driver and receiver, and transmits the test signal sent from the # mark test signal generation unit to the system bus via the communication cable driver. This is a percentage signal that is received by a cable receiver for use with a computer and is judged to be good or bad by the judgment section.

Next, the present invention will be explained in detail with reference to the drawings starting from the tin layer 1.

FIG. 1e is a diagram for reducing the cost of a multi-data communication system to which the data communication control device of the present invention is connected. In other words, T-TA 1g control device MA, ~A command ＼ cutoff setting command 1
fiIB1, data, address line, cometrol#
It is connected to a system path 41B consisting of a normal bus 1isB consisting of a bus line B, etc., and data is normally exchanged between the phases 4 through the bus line B. A diagnostic command signal is sent to the diagnostic setting command line B, and when the other communication control devices receive this signal, they control the operation of the respective internal communication control devices (g cable driver and communication cable receiver). By stopping the supply of power to the bus line eλ, harmful interference signals are prevented from being output to the bus line eλ button exposure. This is a test sent by the communication control device that performs the diagnosis to the bus NB via its own communication cable driver.
s Q and the test signal received from the bus line B via the communication cable receiver,
It is important to check the normality of the 1-m1 driver and cashier.

FIG. 2 is a block diagram showing a 74th embodiment of the present invention. In other words, the arc 616 stroke #W is
It is equipped with the same control unit 1 as the conventional one (Jl, Afg cable driver 200, through-Ig cable lever/bar 201, etc.), and the output of the cable driver 200 is all bus strings B,
The input signal from the bus HBt is received by the cable receiver 201, and the input signal from the bus HBt is received by the control unit 101 as usual.
In response to a command from the central processing unit 1100, the communication terminal 200 performs the A function in IIJI with other communication terminals via the driver 200 and the receiver 201. In this embodiment, in addition to the above, a shape cutting foot command section 104, a diagnostic pulse @θ' generating section 103, a diagnostic pulse @1'' generating section 102, a diagnostic command driver 300, a diagnostic command register, a bar 301
, gate 303 , and size W section 202 . 1
When the foot command unit 104 is set by the diagnostic power installation command from the medium heat treatment equipment 100, it issues a dvJr command, and sends a diagnostic power command that is a specific bus line via the diagnostic command driver 300. Directive #5! A heart sent to B+1. The diagnostic command signal is sent out during the diagnosis and is set on the IJ at the end of the diagnosis, as well as in all other similar control devices 11.
1 receives the diagnostic command signal of L diagnostic installation command-81 at the command receiver 301, then the receiver-3
The output of 01 becomes high level, and the power supply unit 203 is controlled through the gate 303 and the OR circuit 302, and the supply of power for operation of the communication cable driver 200 and the lever 201 is stopped. In other words, it is separated from the system verse. 17, the control device that outputs the diagnosis command signal closes the gate 30 according to the
3 is closed, the high-level output of the receiver 301 due to the diagnostic command signal sent by itself is connected to the power supply section 20.
3, and the communication cable driver 200 and the register pan 01 are supplied with operating power. Then, the diagnosis/health @1” generation part and the diagnostic pulse @0
"The test signal output by the generator is sent to the bus may via the communication cable driver 200, and the test signal on path #B is output to the 4!11 foot section 202 via the communication cable driver 201. The first part 202r compares the above No. 1d and the input signal of the communication cable driver 200, and if they do not match, outputs a signal.
1. That is, the operation of the communication cable driver 200/-201 is checked! Sign. If there is an abnormality, the NO/I level output ri of the determination unit 202
The power supply section 2()3 is controlled via the OR circuit 302,
1-use cable driver 200 and 7-par 2
The power supply for operation of 01 is stopped. The above check will not work if the power to the communication cable relay and receiver of the other control devices connected to the same bus line is cut off, so it may be caused by an abnormality in the other control devices. Bus string B! There are no harmful interference signals on the In other words, there is no possibility that the test will become impossible due to a malfunction in another control device 141, and there will always be a possibility of a normal diagnosis.

Furthermore, if the device itself is defective, the power supply is stopped by the output of the reading/assembling section 202, so that other control devices etc. are not prevented from carrying out diagnosis.

As described above, in the present invention, the control device that performs the diagnosis sets the diagnostic power installation command section and sends the 6 wires to all the widths and 1 holes of the 1 output via the bus. Send f command No. 16, and all other control devices are ordered by
11 (Since the power supply to the cable driver and communication cable driver is stopped, all control devices other than the control device that performs diagnosis are disconnected from the system bus, preventing harmful interference. This has the effect of preventing signals from being sent onto the bus.The control device that performs the diagnosis commands the Fi diagnosis and connects the output of the /-bar with a gate, so the communication cable driver and the communication cable receiver. is in operation, and its normality can be checked using the test signal.Also, if the test bond is defective, it will stop its own power supply, so other control devices can perform a similar test. That is, the # devices on the valley side are respectively
It is possible to carry out each diagnosis without being hindered by equipment failure or the like.

[Brief explanation of drawings]

FIG. 2 is a block diagram showing an embodiment of the present invention. In the figure, lOO...central processing unit, 101...-
Control unit, 102... Diagnosis ~ f pulse 11" Snake part, 10
3...Diagnostic pulse 10'' generation section, 104.Diagnostic power installation command section, 200...Communication cable driver, 201
...m(! Cable receiver 1202/size part,
203...Power supply unit, 300...Diagnostic command driver, 301...Diagnostic command receiver-1302...OR circuit, 303...Gate, B...System bus, B
I...Diagnostic setting command line, B! ...Ordinary buses M, A+ consisting of data lines, address lines, control lines, etc.
~AR...Data communication control device. Agent Patent Attorney Toshimune Sumide

Claims (1)

[Claims] A communication cable driver and a communication cable receiver connected to a system bus, and a control unit that exchanges signals with other devices via the skeleton communication cable driver and communication cable receiver and the system bus. A data communication control device comprising: a diagnostic microcontroller that generates a diagnostic command signal; a test signal generator that generates a test signal; a diagnostic command driver that sends the diagnostic command signal to a specific system path IIaFc; a diagnostic command receiver that receives system bus line No. 16, a gate connected to the diagnostic command receiver that is always open and closes in response to the diagnostic command signal, and an input signal of the communication cable driver and the communication and a determination unit that detects the output signal of the communication cable receiver, and stops the supply of power for operation of the communication cable driver and receiver depending on the output signal of the gate or each output of the determination unit. The communication cable receiver receives a test signal sent from the test signal generation unit to the system bus via the communication cable driver, and the determination unit determines pass/fail. Similar data communication control equipment.