DD280613A1 - ONLINE DIAGNOSTIC ARRANGEMENT FOR NON-BUS HARDWARE ASSEMBLIES - Google Patents

Abstract

The invention relates to an online diagnostic device for non-bus working hardware assemblies and relates to the field of electrical control technology. Their application is possible and expedient in microcomputer controls. Essential features of the invention are the coupling of a single-bit memory unit (SPE) for reading and a control logic unit (SLE) for addressing and for applying a defined control function via the internal bus (IB) with a central processing unit (CPU) and the output side Connecting the control logic unit for setting the switch function to an on the input side with the diagnostic units (DE 1 to DE k) connected points function unit (WFE) and the input side connecting a single-bit memory unit (SPE) for setting the memory contents to the points function unit. Fig. 1

Description

embodiment

The invention will be explained in more detail below using an exemplary embodiment.

Fig. 1: the block diagram of an on-line diagnostic arrangement using the inventive solution, Fig. 2: the functional scheme of the arrangement.

In Fig. 1, the block diagram according to the inventive solution is shown. In a central processing unit ZRE, at least one central processor unit CPU is coupled to a one-bit memory unit SPE and a control logic unit SLE via an internal bus IB. The control logic unit SLE is connected on the output side to the inputs of a point function unit WI ^: E whose further inputs are diagnostic units DE 1 bin DE k. On the output side, the switch function unit WFE is connected to an input of the one-bit memory unit SPE. The diagnostic units DE 1 to DE k and the switch function unit WFE belong to a peripheral unit PE. Fig. 2 shows the functional scheme of the arrangement from the "start" to "exit", from which the exact sequence can be seen on the basis of the entire individual reactions

 The arrangement works in the following way.

According to Figure 2, a module which is controlled by the operating software is called. By this module, the switch function unit WFE via the programmable control logic unit SLE with a control function n, where η in the range 1 <η <k is applied, then causes and causes the diagnostic signal η of the diagnostic unit DEkindieEin bit memory unit SPE is written. Subsequently, the content of the one-bit memory unit SPE is read by the central processing unit CPU and evaluated. This algorithm is executed for all existing k diagnostic functions. Since in this way the diagnostic function n, with which the switch function unit WFE is acted upon at this time, is always known, a fault-related reaction can be initiated in the event of an error. According to the arrangement with the application of the solution according to the invention and the evaluation method resulting therefrom, a number of connections V <k + 1 between the peripheral units PE and the central computer unit ZRE are necessary for these on-line diagnostic functions. This considerably reduces the effort compared to a bus coupling.

Claims (2)

An on-line diagnostic arrangement for non-bus hardware assemblies consisting of a central processing unit including a central processor unit, an internal bus, a one-bit memory unit and a control logic unit, and a peripheral unit including a routing unit and diagnostic units in that the one-bit memory unit (SPE) for reading and the Steuerlogikeinneit (SLE) for addressing and for applying a defined control function via the internal bus (IB) coupled to the central processing unit (CPU) and to the input side with the Diagnostic units (DE 1 to DE k) connected point control unit (SLE) on the output side for setting the switch function and the one-bit memory unit (SPE) on the input side to set the memory contents are connected. For this 2 pages drawings Field of application of the invention The invention relates to the field of electrical control technology and its application is possible and appropriate in microcomputer controls. Characteristic of the known state of the art In microcomputer controls, it is necessary to trigger this appropriate response in case of accidents and errors. For this purpose, diagnostic arrangements are known which evaluate a ready-to-operate signal by means of hardware (NMI). No error localization is possible, and the reaction to errors is always the same. Furthermore, the diagnostic state is detected and evaluated by means of an interface module with a bus interface via a memory or I / O access. To realize this arrangement a lot of effort is required. A combination of both arrangements is also possible, but the disadvantages are not eliminated. In DE-OS 3004818; G05B23 / 02 therefor a programmable diagnostic system for a digital system is described, which contains a programmable, diagnosing, via a first programmable by the central unit switch with a program memory and / or with a first, connected in an interrupt chain functional units diagnostic unit to be connected. This unit is coupled to a diagnostic bus, and functional units can be connected to it via second switches that can be programmed in four positions. By means of a suitable switch position, another side of the first functional units and one side of second functional units can be connected to the diagnostic bus. Without attaching the diagnosing units, a test of the central unit can be performed. A Parallelein-Ausgabebaustein can be used as programmable diagnosing unit. From the functional units and the diagnostic bus, a matrix is set up, at whose points of intersection the programmable switches are arranged. By means of first and second points, the programmable diagnosing unit can carry out the testing of the functional units. With a corresponding set point, the diagnosing unit registers diagnostically relevant features of the functional units via the diagnostic bus and / or corresponding position of the first switch also via the system bus. The evaluation of the features by connecting the diagnosing unit and the program memory takes place via the closed first switch. By means of the second switch, the intervention of the diagnosing unit makes it possible to distinguish the defectiveness of a first and a second functional unit. In addition, test options are synonymous for dif; Functionality of the interrupt system and the central unit available. D 'disadvantage of this known arrangement are also the high cost of their technical realization. Object of the invention The aim of the invention is to expand the functional scope and the flexibility in an on-in-diagnostic A-arrangement, for not working on the bus hardware modules υ lter avoidance of high circuit complexity. Explanation of the essence of the invention It is an object of the invention to provide an on-in diagnostic device for non-bus hardware assemblies consisting of a central processing unit including a central processor unit, an internal bus, a one-bit memory unit and a control logic unit a point function unit and diagnostic units containing peripheral i ι unit allows a selection of different diagnostic conditions and flexible responses to all errors and accidents. According to the invention the object is achieved in that the one-bit Speichereinheii.Zum to read and the control logic unit for addressing the control function via the internal bus to the central processing unit are coupled. On the input side connected to the diagnostic units switch function unit, the output side, the one-bit memory unit for setting the memory contents is connected. With the control inputs of the Woichenfunktionseinheit the control logic unit is connected to set the switch function.