JPS62130429A - Recognizing device for read data - Google Patents

Abstract

PURPOSE:To prevent an erroneous fail safe due to a data read error by judging such a case to be trouble that output dissidence between two microcomputers exceeds the prescribed number of times. CONSTITUTION:After data read through input ports P10-P1n and P10'-P1n' are processed, they are outputted to output ports P20-P2n and P20'-P2n'. then an arithmetic result comparison detection means 2 compares the outputs. If they are coincident with each other, a device targeted in a controller group 6 is controlled, and next data is read. If they are dissident with each other, data are again readout and compared. If said loop is repeated over the prescribed number of times, it is judged to be the trouble, and a trouble discrimination means 4 operates the fail safe to stop the overall controller. If the arithmetic results are coincident with each other before said loop is executed less than the prescribed number of times, it is judged to be normal, and the next data is readout.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a read data confirmation device.

[Conventional technology]

BACKGROUND ART In recent years, electronic control devices have increased multifunctionality, accuracy, and reliability, and use microcomputers that have a simpler configuration and are more versatile.

However, if a failure occurs due to a runaway of the microcomputer due to noise or the like, or if data cannot be read accurately, the entire electronic control device may not operate or malfunction. Therefore, in order to improve reliability in consideration of this emergency situation, two microcomputers were connected in parallel, and when the outputs of the two microcomputers did not match, it was determined that the electronic control unit 6aB had failed. Running failsafe.

(Problem to be solved) As mentioned above, in order to improve the reliability of the operation of the conventional electronically controlled II wave device, two microcomputers are installed in the ilP.
When the outputs of the respective microcomputers did not match, it was determined that there was a failure in the electronic control unit and a fail-safe was implemented. As a result, due to variations in the characteristics of the elements and parts that make up the electronic control unit, external noise, etc., the timing of reading the data from the 2m microcomputer was shifted, and the outputs did not match.
A mis-fail safe was executed, erroneously determining that there was a failure at 1vi.

This invention was made to solve the above problem, and when the outputs of two microcomputers do not match, '? Rather than executing the 7 ale safe of the delta control device, the data is read a set number of times until the calculation results output from the two microcomputers match.
It is an object of the present invention to provide a read data confirmation device capable of executing a fail-safe and eliminating a mistake-fail-safe when they do not match even after reading two set values.

(Means to solve the problem) Achieve the above purpose! In particular, the read data confirmation device of the present invention has two microcomputers that receive data, perform the same calculations, control, etc., and output the calculation results, and are connected in parallel to input and output. an operation result comparison and detection means for receiving each operation result output from the computer and comparing the two operation results and outputting an operation result matching symbol if they match, and outputting an operation result mismatching symbol if they do not match; Upon receiving the calculation result discrepancy symbol output from the calculation result comparison and detection means, the data is read again and the calculation results are compared and confirmed by the calculation result comparison and detection means, and the calculation results output from the two microcomputers match. a data reading confirmation means that repeats data reading until the data is read; and if the number of times the data is read by the data reading confirmation means exceeds a set value, it is determined that the microcomputer and peripheral devices have failed, and a failure signal is output. The device is configured to include a failure determining means, and a stopping means for receiving a failure signal output from the failure determining means, stopping the operation of the two microcomputers, and outputting a stop signal.

[Effect]

As mentioned above, the read data confirmation Wffi of the present invention
In the R position, the data is received and the same calculation is performed.

Two microcomputers that perform control II, etc. and output calculation results are connected in parallel to the input and output, and the calculation result comparison and detection means receives the calculation results output from the 24 microcomputers and performs both calculations. The results are compared, and if they match, the performance result match signal and calculation result are output, and if they do not match, a calculation result mismatch signal is output, and the data reading confirmation means outputs the calculation result comparison detection means. Upon receiving the calculation result discrepancy signal, the data is read again and the calculation results are compared and confirmed.The data is read and repeated a set number of times until the calculation results output from the two microcomputers match, and the failure judgment means reads the data. If the number of readings exceeds a set value, it is determined that the microcomputer and peripheral devices have failed, and a failure signal is output, and the stopping means operates the two microcomputers upon receiving the failure signal output from the failure determining means. and outputs a stop signal.

〔Example〕

Next, embodiments of the invention will be described with reference to the drawings.

FIG. 1 is a wiring diagram of an embodiment of the read data confirmation device of the present invention.

The illustrated read data confirmation device receives data from an input port, performs the same calculations, controls, etc., outputs the calculation results to an output port, and is connected in parallel to the input and output ports. Output ports P2o to Pz6 of the microcomputers 1 and 1-. P
-ha ~P-: Receiving the calculation result output from L4, comparing both calculation results, if they match, outputs the calculation result match signal and the calculation result, and if they do not match, outputs the calculation result mismatch signal. The comparison detection means 2 and the input port P4 of the microcomputer 1.1' are outputted from the calculation result comparison detection means 2 and receive the fC calculation result discrepancy signal.
~ P1.6 + P -10 - P -16 reads data and repeats reading the data a set number of times until the calculation results match with the calculation result comparison detection means 2 Data reading confirmation means 3 and data reading confirmation means 3 failure determination means 4 which determines that the microcomputer 1.1- and peripheral equipment has failed when the number of readings exceeds a set value and outputs a failure signal; and failure determination means 4;
a stop means 5 which stops the operation of the microcomputer 1.1- in response to the failure signal output from the microcomputer 1.1-, outputs a stop signal, and inputs the stop signal to the input ports-1-P4L, P4- of the microcomputer 1,1-; It is composed of

The computation result comparison section of the computation result comparison/detection means 2 is constituted by AND circuits a to a, and uses AND circuits a0 to aY of the necessary bits.

Data loading confirmation means 3. The failure determining means 4 and the stopping means 5 are executed by the microcomputer 1, for example.

6 is the control of each controlled purpose! jfl 'a'!
Jf! It is B.

Next, the operation of this embodiment will be explained with reference to the operation flowchart 1 to 1 shown in FIG.

When the operation starts in step S1, the entire control device is initialized in step S2, and the input port P1.1 of the microcomputer 1.1' is initialized in step S3. ~P.

+P-10" Read data from P-tm, input ports PtO~P, , P-, o in step S4
-P-,.

Each piece of data read in is subjected to the intended processing to calculate the result, and the process moves to step S5 to the output port P26.
""" 2a* Output the result from P-, to ~P-xtn-.Next, in step S6, the calculation results are compared by the calculation result comparison detection means 2.If the compared results match Control device group 6 moves to step S7.
Decide whether to control the target device based on the calculation result,
The data is output in step S8, and the process returns to step S3 to read the data and control the next operation.

In step S6, when the calculation results are compared by the calculation result comparison and detection means 2 and there is no match, the process moves to step S9 and returns to step S3 to read data and determine whether the calculation results match. If this loop is repeated for more than the set time, the failure determination means 4 determines that the microcomputer 1.1' or the 3H device has failed, and the process moves to step S10, where the failsafe is activated and step S
At step 11, the entire control device is stopped.

If the calculation results match within the set number of loops, the failure determining means 4 in step S9 determines that the data reading timing is shifted and the calculation results do not match, and fail-safe is not executed.

Needless to say, the number of input bits can be changed arbitrarily.

〔effect〕

As explained above, the read data confirmation device of the present invention includes a calculation result comparison detection means for comparing the calculation results of two microcomputers, and a data read confirmation means for repeatedly reading data a set number of times until the calculation results match. , a failure determination means that determines whether it is an input error during data reading based on the number of times the data is read or a failure in the microcomputer or the surrounding equipment, and a stop means, so that if the outputs of the two microcomputers do not match, There is no need to immediately execute the fail-safe of the electronic system (II device), and it is possible to determine whether it is a data reading error or a failure of the microcomputer or peripheral equipment, making it possible to eliminate the error fail-safe caused by data reading errors.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the invention, and FIG. 2 is an operation flowchart of the embodiment of the invention. 1. 1-... Microcomputer, 2... Calculation result comparison detection means, 3... Data reading confirmation means, 4... Late VJ publication cutting means, 5... Stopping means. Applicant: Niki Denki Home Electronics Co., Ltd. Agent: Patent Attorney Masu 1) Takeo Figure 1

Claims (1)

[Claims] 1. Two microcomputers that receive data, perform the same calculations, control, etc., and output the calculation results are connected in parallel to the input and output, and the output from the two microcomputers is and an operation result comparison and detection means for receiving the respective operation results and comparing the two operation results, and outputting an operation result matching signal and the operation result when they match, and outputting an operation result mismatch signal when they do not match; Upon receiving the calculation result mismatch signal output from the comparison detection means, the data is read again and the calculation results are compared and confirmed by the calculation result comparison and detection means, and the data is set until the calculation results output from the two microcomputers match. a data reading confirmation means for repeating the data reading a number of times; a failure determination means for determining that the microcomputer and peripheral devices have failed and outputting a failure signal when the number of data readings by the data reading confirmation means is equal to or greater than a set value; Upon receiving the failure signal output from the determining means,
1. A read data confirmation device comprising a stop means for stopping the operation of each microcomputer and outputting a stop signal. 2. The read data confirmation device according to claim 1, wherein the calculation result detection means is constituted by an AND circuit.