JPH02219340A - Device self-diagnostic system - Google Patents

Abstract

PURPOSE:To efficiently perform self-diganosis for a device by storing a faulty unit by performing the check of plural printed board units by the control signal of a control part, and executing a program only by a normal unit. CONSTITUTION:The control signal is sent sequentially to the plural printed board units 21-2n from the control part after performing initialization on transmission equipment 40, and a normal operation can be confirmed by a response to the signal. When the faulty unit exists, it is recorded on a flag table 30. Next, the table 30 is referred just before the program is executed by the control means 10, and the presence/absence of the faulty unit is confirmed, and an ordinary processing is executed when all the units are operated normally. When the faulty unit exists, the next processing routine is executed by jumping a processing routine including the faulty unit. In such a way, the processing can be executed by a normal printed board other than the faulty unit.

Description

[Detailed Description of the Invention] [Summary] Regarding a device self-diagnosis method for a transmission device that processes input data and sends it to a transmission path, when the power is turned on, a plurality of printed board units are checked by a control means, The purpose is to provide a device self-diagnosis method that records the results in a flag table and selects a processing routine based on the contents of the flag table when executing a program. In a transmission device equipped with multiple printed circuit board units that process and send out to a transmission path, when the power is turned on, the control means sends control signals to the multiple printed circuit board units, confirms the response, and monitors the status. A flag table is provided to record the flag table, and the control means refers to the flag table immediately before executing the specified program. If there is no faulty printed board unit, normal processing is performed, and if there is a faulty printed board unit, the flag table is checked. The processing routine including the faulty printed circuit board unit is jumped and the next processing routine is executed.

[Industrial application field]

The present invention relates to a device self-diagnosis method for a transmission device that processes input data and sends it to a transmission path.

For example, in moving image transmission using a digital line, it is necessary to process a large amount of data at high speed, resulting in an increase in the scale of the equipment and the use of a large number of printed board units.

If self-diagnosis of such large-scale equipment is performed sequentially using hardware checks, the number of external interfaces for the control unit will increase, and the internal wiring of the equipment will become congested, which is one of the causes of reduced reliability of the equipment. Become.

Therefore, self-diagnosis of large-scale equipment using a large number of such printed board units can be performed efficiently by reducing the number of external interfaces of the control unit, and when a faulty printed board is detected, the printed board unit can be removed. A device self-diagnosis method is required to avoid this and take action.

[Conventional technology]

FIG. 4 shows a block diagram illustrating a conventional example.

The conventional example shown in Fig. 4 is a moving image encoding device as an example of a device that uses a large number of printed circuit board units, and is an A/D converter that converts video input into A/D as a device for sending signals. A conversion section 51, a Y/C separation and multiplexing section 53 that separates and multiplexes luminance signals and hue signals, a frame buffer section 55 that includes a filter and frame buffer that removes unnecessary bands, and An encoding unit 56 that performs encoding; a transmission frame configuration unit 58 that sends out signals in accordance with the transmission line interface; and a transmission frame decomposition unit that is unisymmetrically configured with the transmission side as a device for receiving signals. 59, decoding unit 57
, frame buffer section 55a, Y/C synthesis and separation section 5
4. It is equipped with a D/A conversion section 52 and a control section 11 that controls these component devices.

In this conventional example, self-diagnosis of the device is performed by manually setting loopback points in sequence, inputting a video signal from the input side, looping back the signal at the set loopback point, and outputting it through the reverse route. Normal operation is confirmed by comparing the input signal and output signal at this time.

The points of return are ■A/D converter 51, D/D converter 51,
A conversion unit 52, ■Y/C separation and multiplexing unit 53, Y/C combination and separation unit 54, ■Frame buffer unit 55.55a
, (2) encoding section 56, decoding section 57, (2) transmission frame composition section 58, and transmission frame decomposition section 59, respectively. The return test at point (①) will be an overall test.

In order to perform these loopback tests, it is necessary to provide a plurality of test terminals for each component, and the interface with the control section 11 becomes complicated.

[Problem to be solved by the invention]

The conventional device self-diagnosis method described above requires a large number of interfaces between the control section and the printed board unit for self-diagnosis, making it complicated.

Additionally, when the control unit accesses a faulty printed circuit board unit during operation of the transmission equipment, a bus error occurs, but in the operation program, it is difficult to isolate the faulty part, and the operation of the entire equipment may stop. There is a problem with storing it away.

The present invention provides an apparatus that checks a plurality of printed board units by a control means when the power is turned on, records the results in a flag table, and selects a processing routine based on the contents of the flag table when executing a program. The purpose is to provide a diagnostic method.

[Means to solve the problem]

FIG. 1 shows a block diagram illustrating the invention in detail.

In the block diagram of the principle of the present invention shown in FIG. 1, 10 is a control means for controlling the transmission device, and 21 to 2n are printed board units that perform predetermined processing on the transmission data and send it out to the transmission path. Yes, 30 sends a control signal to a plurality of printed board units from the control means 10 when the power is turned on, checks the response,
40 is a flag table for recording the state, and 40 is a control means 10, a plurality of printed board units 21 to 40.
2n and a flag table 3o, and is a means for solving this problem by providing such means.

[For production]

After performing predetermined initial settings when the transmission device 40 is powered on, the control unit 10 controls the plurality of printed board units 21 to 2n.
A control signal is sequentially sent to the controller, the response is confirmed, and the status is recorded in the flag table 3o.

Immediately before executing the specified program, the control device 10 refers to the flag table 3o, checks the presence or absence of a faulty printed board unit, and checks whether or not there is a faulty printed board unit 2.
When all 1 to 2n are normal, execute normal processing,
When there is a faulty printed board, the processing routine that includes the faulty printed board is jumped and the next processing routine is executed, thereby efficiently performing device self-diagnosis, and when there is a faulty printed board unit, the faulty printed board unit is It becomes possible to provide an efficient device self-diagnosis function that can perform processing only with normal printed board units.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in FIGS. 2 and 3.

FIG. 2 is a block diagram illustrating the present invention in detail, and FIG. 3 is a diagram illustrating a flowchart of an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

The embodiment of the present invention shown in FIG. 2 includes, as the control means 10 explained in FIG. The board units 21 to 2n include an A/D converter 51 and a D/A converter 5 having the same configuration and functions as those explained in FIG.
2, Y/C demultiplexing and multiplexing section 53, Y/C combining and demultiplexing section 54, frame buffer section 55.55a, encoding section 56
, a decoding section 57, a transmission frame composition section 58, and a transmission frame decomposition section 59.

The flowchart for device self-diagnosis in this configuration is shown in the third section.
This is as shown in the figure, and will be explained according to the steps of the flowchart.

■ Perform initial settings and address settings for various peripheral devices.

(2) Subsequently, the control section 11 sequentially sends various control signals to the plurality of printed board units 21 to 2n, and by checking the responses, the normal operation of the plurality of printed board units is confirmed.

(2) When a bus error occurs in (2), a flag table is set to display the printed board unit in which the failure has occurred, and its contents are output to the display section 15.

(2) Immediately before executing the process specified by the control unit 11, the flag table 30 is checked to determine whether there is a bus error and, if there is a bus error, which printed board unit it is.

(2) If everything in the flag table 30 is normal, processing is executed according to a normal processing routine.

(2) When a flag indicating that there is a faulty printed board unit is set in the flag table 30, the processing section 11 jumps the processing routine including the faulty printed board unit and executes the next processing routine.

As mentioned above, when the power is turned on, the control unit checks a plurality of printed board units, and if a check error occurs, a message is displayed on the display and only the printed board units that can operate normally are operated. This makes it possible to realize an efficient device self-diagnosis method.

〔Effect of the invention〕

According to the present invention as described above, by checking a plurality of printed circuit board units using a control signal from the control section when power is turned on, it becomes easy to isolate a fault, and it is possible to operate only with normal printed circuit board units. This has the effect of providing an efficient device self-diagnosis method.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining the present invention in detail, FIG. 2 is a block diagram explaining the present invention in detail, FIG. 3 is a diagram explaining a flowchart of an embodiment of the present invention, and FIG. 4 is a conventional example. A block diagram explaining the following is shown. In the figure, 10 is a control means, 10A, 11 are control units, 15 is a display unit, 21 to 2n are printed board units, 30 is a flag table, 40 is a transmission device, 51 is an A/D conversion unit, and 52 is a D/D converter unit. A conversion section, 53 is a Y/C demultiplexing and multiplexing section, 54 is a Y/C combining and demultiplexing section, 55.55a is a frame buffer section, 56 is an encoding section, 57 is a decoding section, 58 is a transmission frame 59 is a transmission frame decomposition unit.

Claims (1)

[Claims] A transmission device (10) comprising a control means (10) for controlling the transmission device, and a plurality of printed board units (21 to 2n) that perform predetermined processing on transmission data and send it out to a transmission path. 4
0), a flag table (30) for sending a control signal from the control means (10) to the plurality of printed board units (21 to 2n) when the power is turned on, checking the response, and recording the state thereof; the control means (10) refers to the flag table (30) immediately before executing the specified program;
When there is no faulty printed board unit, normal processing is performed, and when there is a faulty printed board unit, the processing routine including the faulty printed board unit is jumped,
A device self-diagnosis method characterized by executing the following processing routine.