JPH0454096A - System for clock maintenance information distribution and alarm information collection - Google Patents

Abstract

PURPOSE:To simplify the system constitution and to save man-hour of cable wiring by providing a processor, an oscillator, a data converter and a level converter to a controller and providing a clock extraction circuit, an oscillator and an insertion extraction section to a controlled device. CONSTITUTION:A maintenance management device 1 uses a level converter 12 to convert an internal TTL signal into a bipolar signal together with a serial data and a clock and outputs the result onto a bus. Moreover, a received bipolar signal is converted into a TTL signal by a level converter 12 and informed to a processor 4 via a converter 5. A series of operation is controlled by the software of the processor 4. Each of units 2-0-2-n of the unit 2 has respectively a fixed length identification number, a bit string of a fixed length assigned in advance in a serial data outputted together with the system clock from the maintenance management device 1 is monitored and when it is coincident with each identification number, the maintenance information is extracted by an insertion extraction section 11 and it is outputted into the device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system for clock/maintenance information distribution and alarm information collection, and particularly to a system for clock/maintenance information distribution and alarm information collection realized by serial data and clock multiplexed bipolar signals. This invention relates to a system for collecting warning information.

[Prior Art] Conventionally, in a system for clock/maintenance information distribution and alarm information collection, as shown in Fig. 2, clock distribution and maintenance/alarm information transmission and reception are performed through separate routes, and the transmission method is v.
, 11, etc., is a balanced transmission system.

In Fig. 2, 1 is a maintenance management device, 2 is a unit 2-
0 to 2-(n-1) devices as a generic name or common name, 3 is a system clock supply device.

The maintenance management device 1 includes a processor 4 that manages maintenance/alarm information, a converter 5 that interfaces with the pro sensor 4 and mutually converts serial data, and a TTL signal.
A level converter 6 that mutually converts the 11 signals, and a level converter (RCV) 7 that converts the 11 signals into TTL signals.

The device 2 also includes a level converter 6 that mutually converts the TTL signal and the 611 signal, a level converter (RCV) 7 that converts the 611 signal to the TTL signal, and an oscillator that operates in accordance with the received clock. 10 and insertion of maintenance/alarm information/
It has an extraction section 11.

The device 2 consists of n units 2-0 to 2-(n-1).

Furthermore, the system clock supply device 3 includes a level converter (DRV) 8 that converts the TTL signal into a 11 signal.
It has an oscillator 9 that generates the basic clock of the system.

Next, the operation will be explained. The clock is transmitted from the system clock supply device 3 to the maintenance management device 1 and the devices 2 using a balanced transmission method, and the oscillator 10 of each device 2 operates in accordance with the received clock. A series of operations in transmitting and receiving maintenance information is controlled by software of the processor 4. Each unit 2-0 to 2-(n-1) of the device 2 has a fixed-length identification number, and each unit uses a pre-allocated fixed-length bit string in the serial data output from the maintenance management device N. It is monitored, and if it matches each identification number, the maintenance information is extracted by the insertion/extraction section 11 and output into the device. Immediately thereafter, the device 2 inserts the internal alarm information together with the identification number into the serial data through the insertion/extraction unit 11, and the maintenance management device 1 updates the status of each device 2 with software based on the received identification number. to notify and manage.

[Problem to be solved by the invention]

In the conventional clock/maintenance information distribution and alarm information collection system, the maintenance management device 1 and the system clock supply device 3 are configured as separate devices, so the serial data and system clock are separate cables, which causes problems due to the system configuration. The number of cables increased, leading to an increase in the number of man-hours required for wiring work. Furthermore, since the balanced transmission method of the V.11 interface is adopted as an interface between devices, there are problems in that the transmission distance is limited and the layout of each unit is limited.

[Means to solve the problem]

In order to solve these problems, the present invention includes a control device that includes a processor that performs maintenance operation management, an oscillator that generates the basic tarock of the system, and a processor that converts parallel maintenance information from a processor into serial maintenance information. In addition, a data converter that converts serial maintenance information into parallel maintenance information, and a level converter that synthesizes the serial maintenance information and the output clock of the oscillator and mutually converts the TTL signal and bipolar signal are provided. The control device includes a clock extraction circuit that mutually converts a TTL signal and a bipolar signal to extract a clock, an oscillator that follows the clock extracted by this clock extraction circuit, and a system that extracts serial maintenance information from the bipolar signal. The apparatus is provided with an insertion/extraction section that distributes the maintenance information generated within the device and inserts the internal alarm information into the serial maintenance information.

[Effect]

In the clock/maintenance information distribution and alarm information collection system according to the present invention, the system clock distribution and the maintenance/alarm information exchange route are the same due to bipolar coding.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a system for distributing clock/maintenance information and collecting alarm information according to the present invention.

In FIG. 1, a maintenance management device 1 as a control device is
A processor 4 that manages maintenance/alarm information, a data converter 5 that mutually converts serial data at the interface with the processor 4, a level converter (LVC) 12 that mutually converts TTL signals and bipolar signals, and a system. The oscillator 9 generates a clock. The maintenance management device 1 converts an internal TTL signal into a bipolar signal for both serial data and a clock using a level converter 12, and outputs the bipolar signal onto the bus. Further, the received bipolar signal is converted into a TTL signal by the level converter 12, and is notified to the processor 4 through the converter 5.

The controlled device 2 to be maintained and managed includes a level converter I2 that mutually converts a TTL signal and a bipolar signal, and a level converter I2 that extracts serial maintenance information from the bipolar signal and distributes the extracted maintenance information inside the device. It consists of an insertion/extraction section 11 that inserts alarm information into serial maintenance information, and an oscillator 10 that operates in accordance with the clock received and extracted by the level converter 12.

Next, the operation will be explained. The series of operations is performed by Prosensor 4.
controlled by software. Each unit 2-0 of device 2
~2-(n-1) each has a fixed-length identification number, and monitors the pre-assigned fixed-length bit string in the serial data output from the maintenance management device 1 along with the system clock. If the maintenance information matches each identification number, the insertion/extraction unit 11 extracts the maintenance information and outputs it into the device.

Further, after this, the device 2 inserts the internal alarm information together with the identification number into the serial data by the insertion/extraction unit 11, and the maintenance management device 1
Notify and manage the status of the software.

〔Effect of the invention〕

As explained above, the present invention provides a control device with a processor, an oscillator, a data converter, and a level converter, and a controlled device with a clock extraction circuit, an oscillator, and an insertion/extraction section. System clock distribution and maintenance/
Because the routes for transmitting and receiving alarm information are the same due to bipolar coding, the system configuration is simplified and the number of man-hours required for cable wiring can be reduced.Since bipolar coding is used, the repeater allows more flexibility in the layout within the station. have an effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a clock/maintenance information distribution and alarm information collection system according to the present invention, and FIG. 2 is a block diagram showing a conventional clock/maintenance information distribution and alarm information collection system. . DESCRIPTION OF SYMBOLS 1... Maintenance management device, 2... Device, 4... Processor, 5... Data converter, 9.10... Oscillator,
11... Insertion/extraction unit, 12... Level converter, 2
-0 to 2-(n-1)...unit. Figure 1 Patent applicant NEC Corporation

Claims (1)

[Scope of Claim] A system in which a single control device distributes a clock to a plurality of distributed controlled devices to transmit and receive maintenance information, the control device comprising: a processor that performs maintenance operation management;
an oscillator that generates a basic clock of the system; a data converter that converts parallel maintenance information from the processor into serial maintenance information; and a data converter that converts the serial maintenance information into parallel maintenance information; The controlled device includes a level converter that mutually converts the TTL signal and the bipolar signal by combining the output clock of the oscillator, and the controlled device includes a clock extraction circuit that mutually converts the TTL signal and the bipolar signal and extracts the clock. , an oscillator that follows the clock extracted by this clock extraction circuit, extracts serial maintenance information from the bipolar signal, distributes the extracted maintenance information inside the device, and converts internal alarm information into serial maintenance information. A system for distributing clock/maintenance information and collecting alarm information, comprising an insertion/extraction section for insertion.