JP5061944B2 - Error content code display method - Google Patents

Description

  The present invention relates to an abnormality content code display method used in a simple monitoring terminal device that displays an occurrence of an abnormality with a coded value when the occurrence of an abnormality occurs in a digital protection relay device or the like.

  The display device used in the simple monitoring terminal device is generally required to be small and inexpensive. For this reason, the operation unit and the display unit in the display device need to have a function adapted to the user's demand while using the minimum necessary parts and having a simple structure.

  For example, as one of the functions of the terminal device, a self-check function is provided to constantly monitor the status of the terminal itself and to notify the user by generating an alarm when an abnormality is detected. An abnormal code is assigned to each type, and when an abnormality occurs, the user can determine the content of the abnormality using the abnormal code.

  In addition to the above, there is an LED board text display system that includes an LED board display device unit and a terminal control device unit that are installed at a distance from each other, and both device units are connected via a communication path. In this system, when a failure occurs in the communication path, a communication error may occur and a desired screen may not be displayed on the LED display board, and the user (user) cannot be notified of the system abnormality.

Therefore, in order to solve such a problem, the system does not respond to a transmitted message even if a certain period of time has elapsed, and when it is determined that some abnormality has occurred in the terminal control unit. The failure screen is displayed as text on the LED display board to inform the user of the system abnormality (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 06-019745

  The abnormal code in the simple type monitoring terminal device employs a means of expressing numbers and letters using an LCD display or the like. However, when the LCD display is mounted, there is a problem that the price of the entire device increases. Also, if the apparatus is not provided with an abnormal code display function, it is necessary to connect a maintenance tool or the like to the apparatus to determine the content of the abnormality, resulting in a problem of trouble.

  Further, in the LED board text display system described above, if the LED display board device section notifies the system abnormality, the entire system becomes complicated and large, and the LED display board device section displays text. Therefore, there is a problem that the LED display board device is also increased in size.

  The present invention has been made in view of the above circumstances. A display unit is configured by arranging a plurality of digits of LED elements in parallel, and the display of the lighting / extinguishing state of the LED display unit is coded to display an abnormality of the apparatus. An object of the present invention is to provide a method for displaying an abnormal content code.

  In order to achieve the above object, in the digital protection relay device having a monitoring function, the present invention comprises a display unit that encodes and displays the contents of monitoring abnormality numerically with LED elements arranged in parallel. When the numerical code of the monitoring abnormality content is lit and displayed on the LED element, it is lit and displayed sequentially from the higher digit to the lower digit, and then the lit and abnormal code is displayed. After storing, the abnormal contents are displayed as a code.

  According to the present invention, it is possible to easily display an abnormality content code from the lighting state and the unlighting state of the LED display unit. Further, the LED display unit by such a method has an advantage that it can be configured easily and inexpensively as compared with an LCD display or the like. In addition, it is not necessary to check the error content code using a maintenance tool, etc., and the error content code can be judged from the lighting / extinguishing state of the LED display simply by switching the switch, which also has the advantage of improved operability and functionality. can get.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram of a digital protection relay device applied to the abnormal code display method of the present invention. This relay device includes a plurality of digital relay units 11 to 11n and the digital relay units 11 to 11n. 11n continuous monitoring circuit 12 for performing constant monitoring, inspection monitoring circuit 13 for performing similar inspection monitoring, encoding circuit 14 for numerically encoding a plurality of contents of monitoring abnormalities, and contents of the monitoring abnormalities being numerically encoded It is comprised from the maintenance panel 16 provided with the LED display part 15 comprised from the LED element (light emitting diode element) which mentions the detail to display later.

  Here, a schematic configuration of the digital protection relay device will be described with reference to FIG. In FIG. 2, the relay device is composed of a main digital relay unit M and a digital relay unit FS in charge of fail-safe. The configuration of the digital relay unit FS is substantially the same as that of the digital relay unit M.

  The digital relay unit M includes filter circuits 21 and 22 that shape the voltage V and current I from the transformer and current transformer, sample and hold circuits 23 and 24 that sample the outputs of the filter circuits 21 and 22, and these sample and hold circuits. A multiplexer circuit 25 that multiplexes and outputs the outputs of 23 and 24, an A / D converter 26 that A / D converts the output of the circuit 25, and a CPU 27, a memory circuit 28, a settling value circuit 29, a digital It also has a computer with input DI and digital output DO.

  The outputs of these digital relay units M and FS are ANDed, that is, when both the digital relay units M and FS operate, a trip command is issued via a predetermined trip circuit. In FIG. 2, the output of the trip relay 20 is configured to take the AND condition together with the outputs of the digital relay units M and FS.

  The constant monitoring circuit 12 inputs a signal from each digital output DO of the relay units 11 to 11n at a constant cycle of several milliseconds to several seconds, performs predetermined constant monitoring, and if an abnormality is detected, maintenance is performed. An abnormality display is instructed to the panel 16.

  Similarly, the inspection monitoring circuit 13 inputs signals from the respective digital outputs DO of the relay units 11 to 11n, and periodically performs predetermined inspection monitoring on the set “day”, “hour”, and “minute”. When an abnormality is detected, the maintenance panel 16 is instructed to display an abnormality.

  The encoding circuit 14 inputs signals from the digital outputs DO of the digital relay units 11 to 11n and automatically monitors for abnormalities. When an abnormality is detected, the content of the abnormality is encoded and the maintenance panel 16 and the LED display unit 15 displays an abnormal content display with the LED on / off, as will be described later.

  FIG. 3 is an explanatory diagram showing a list of abnormal contents that have occurred in automatic monitoring. The abnormal contents shown in FIG. 3 are displayed abnormally on the maintenance panel 16 by the functions of the constant monitoring circuit 12 and the inspection monitoring circuit 13. At the same time, it is coded separately by the action of the coding circuit 14, and the LED display unit 15 mounted on the maintenance panel 16 is displayed as a code in the on / off state.

  In this way, by coding the abnormality generated by the automatic monitoring by turning on / off, it becomes possible to easily determine the content of the abnormality and the location of the failure.

  Next, an embodiment of an LED display unit applied to the abnormality content code display method of the present invention will be described. FIG. 4A is a configuration diagram of the LED display unit. “A” to “D” are LED elements, and these LED elements “A” to “D” are arranged in parallel with four-digit LED elements. Each LED element “A” to “D” is lit and displayed on the LED element of each digit by the BCD display for each digit with the following numerical meanings.

LED element “A”: “8”
LED element “B”: “4”
LED element “C”: “2”
LED element “D”: “1”
For example, when the number to be displayed is “5”, LED element “B” and LED element “D” are turned on and LED elements “A” and “C” are turned off from 5 = 0 × 8 + 4 + 0 × 2 + 1. . The lighting / extinguishing state of the LED element at this time is shown in FIG.

  For example, when the abnormality display of “DI / O monitoring (input / output mismatch)” of the abnormality content code “6-1” shown in FIG. 3 is performed using the LED display unit 15 as described above, the rotary shown in FIG. When the switch is set to the “F” position, an abnormal content code display state is set.

  The abnormality content code display processing method is processed as in the steps of the flowchart shown in FIG. In FIG. 6, first, when the rotary switch is set to the position “F”, an abnormality display process is started in step S1, “flash all LEDs three times”, and the process proceeds to step S2.

  If it is determined in this step S2 that “abnormal code is present”, the process proceeds to step S3, where “the tens digit LED of the undisplayed abnormal code is turned on”. Since the abnormality code is “6-1”, if the number is “61”, the LED elements “B” and “C” are in a lighting state as shown in FIG. 4C (from 6 = 4 + 2).

  Thereafter, the process proceeds to step S4, and when “one LED of the undisplayed abnormal code is turned on”, the LED element “D” is turned on, and the lighting state as shown in FIG. If the process of step S4 is completed, the process proceeds to the process of step S5. After performing “memory of the abnormal code displayed this time”, the process proceeds to the process of step S6 to “flash all LEDs twice”. Proceeding to the determination process, if it is determined that there is no “undisplayed abnormal code”, all the abnormal codes stored in step S8 are cleared, and the process returns to step S1. If it is determined in step S7 that there is an “undisplayed abnormal code”, the process returns to step S3.

  In the above-described embodiment, when a plurality of monitoring abnormalities are detected, it is possible to automatically advance using a known circuit and sequentially display codes corresponding to the plurality of monitoring abnormalities.

The schematic block block diagram of the digital protection relay apparatus to which the abnormal content code display method of this invention is applied. The block diagram which shows an example of a digital protection relay apparatus. Explanatory drawing which shows the example which converted the content of the monitoring abnormality into the numerical code. (A) is a block diagram of the LED display part applied to the abnormal content code display method of this invention, (bd) is explanatory drawing which shows a LED element lighting state. Explanatory drawing of a rotary switch. The flowchart of an abnormality content code display process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11-11n ... Digital relay unit 12 ... Constant monitoring circuit 13 ... Inspection monitoring circuit 14 ... Coding circuit 15 ... LED display part 16 ... Maintenance panel

Claims (1)

In digital protection relay device with monitoring function,
The display part that displays the contents of the monitoring abnormality encoded with numerical values is composed of LED elements arranged in parallel,
When displaying the numerical code of the monitoring abnormality content on the LED element, the numerical value of the numerical value of the numerical value is sequentially lit from the highest digit to the lower digit, and then the abnormality content code that is lit is stored. An abnormality content code display method in the digital protective relay device, wherein the abnormality content is displayed as a code after the failure has occurred.

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