JP3285468B2 - History display device of protection relay device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection relay device, and more particularly to a history display device of a protection relay device capable of confirming the history of a setting operation.

[0002]

2. Description of the Related Art In a conventional protection relay device in an electric power system, for example, as described in Japanese Patent Application Laid-Open No. Sho 62-33810, an operation for setting operating conditions is usually carried out on the front surface of the main body of the protection relay device. The operation is performed by a setting operation panel including a built-in light emitting display and push buttons.

For example, as described in Japanese Patent Application Laid-Open No. 6-8644, a personal computer can be connected to the protection relay unit to perform automatic inspection of the protection relay unit itself and analysis of relay operation. It is also known to be used.

[0004]

In the conventional protection relay device, when the protection relay device is operated due to an abnormality in the power system or the like, what kind of power system condition causes the protection relay device to operate. The analysis can be performed.

However, when the protection relay device performs an unusual abnormal operation, whether the cause of the abnormal operation is based on the failure of the protection relay device body, or
It was not possible to distinguish whether it was based on an input error during the setting operation to the protection relay device.

In a recent protection relay device, a setting operation panel using a touch panel display is often used as a setting operation panel, and a setting position key, a setting function key, and the like displayed on a screen of the display are used. Since the input is performed by touching the corresponding position of the numeric keypad with a fingertip, the probability of erroneous input due to pressing an adjacent key screen is higher than that of a conventional push button type setting operation panel. . Whether an erroneous input has been made can be determined by checking the setting conditions displayed on the display of the same setting operation panel. However,
In the case of conventional protection relay devices, if you start operation while overlooking incorrect input,
When the protection relay device was operated, there was no method for confirming whether there was an error in the setting operation, and there was a possibility that the reliability of the setting operation of the protection relay device might be reduced. In addition, even if the settling operation itself is correct, but the set value has been rewritten inside the protection relay device afterwards, whether the setting operation was correct or whether there was a problem with the protection relay device itself was , The reliability of the protection relay device may be reduced.

An object of the present invention is to provide a highly reliable protection relay device.

[0008]

In order to achieve the above object, a protection relay device, input means for inputting an operation for setting an operating condition of the protection relay device, and contents of the setting operation input by the input means are provided. Conversion means for converting to a code, storage means for storing the code converted by the conversion means, and display means for reading out the code stored in the storage means, performing an inverse conversion, and displaying it as log data of the settling operation It is provided with.

In the history display device of the protection relay device, preferably, the display means is a portable human interface, and by connecting the portable human interface to the protection relay device,
The setting operation history can be displayed.

In the history display device of the protection relay device, preferably, the portable human interface has the functions of the input means, the conversion means, and the storage means.

In the history display device of the protection relay device, the input means is preferably arranged on a front panel of the protection relay device.

In the history display device of the protection relay device, preferably, the input means is a display corresponding to a key displayed on a flat panel, and a key is input by selecting a corresponding key portion of the display. It is.

In the history display device of the protection relay device, preferably, the input unit includes a setting position key for specifying a protection relay to be set, a setting function key for specifying a setting operation, and a numeric keypad for inputting a numerical value. Is what is being done.

[0014] The history display device of the protection relay device preferably further comprises a printing means for reading out the code stored in the storage means, performing an inverse conversion, and printing out the data as history data of the settling operation. Things.

[0015]

According to the present invention, a protection relay device, input means for inputting an operation for setting the operating condition of the protection relay device, conversion means for converting the contents of the settling operation input by the input means into codes, and this conversion Storage means for storing the code converted by the means, and display means for reading out the code stored in the storage means, inverting the code, and displaying the data as the log data of the settling operation. It can be confirmed.

The display means is a portable human interface. By connecting the portable human interface to the protection relay device, it is possible to easily display the setting operation history in each protection relay device.

Further, the portable human interface has the functions of the input means, the conversion means and the storage means, so that the setting operation of the protection relay device can be performed by the portable human interface.

Further, since the input means is disposed on the front panel of the protection relay device, the protection relay device can set the protection relay device.

Further, the input means is a display corresponding to the key displayed on the flat panel, and the input operation can be facilitated by selecting a corresponding key portion of the display and performing a key input. Become.

Further, since the input section is composed of a setting position key for designating a protection relay to be set, a setting function key for designating a setting operation, and a numeric keypad for inputting a numerical value, the setting operation can be facilitated. It will be.

[0021] Further, by providing a printing means for reading out the code stored in the storage means, inverting the code, and printing it out as settling operation history data, a record of the settling history can be stored, and the printing of the setting history can be performed. The contents of the setting operation can be easily confirmed from the contents.

[0022]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of an entire system of a protection relay device and a portable human interface of the protection relay device according to an embodiment of the present invention.

On the front surface of the main body of the protection relay device 100,
A setting operation panel 110 is attached. A touch panel display 120 is provided at a main part of the setting operation panel 110. Below the touch panel display 120, an integrated display LED unit 130 and a push button switch 135 are provided. Normally, nothing is displayed on the touch-panel display 120, and information such as information indicating that the apparatus is operating or an abnormality has occurred is collectively displayed on the integrated display LED unit 130. I have. The push button switch 135 is a switch for selecting a display screen so that only a basic display can be performed without using the touch panel display 120 during a patrol or the like. Touch panel display 1
At the lower right of 20, a portable tool connector 140 is provided.

The touch panel display 120 includes:
When the power is turned off, nothing is displayed, but when the power is turned on, the set position key 122,
The setting function key 124 and the numeric keypad 126 are displayed.
These setting position key 122 and setting function key 12
By touching the positions of 4 and ten keys 126 with a fingertip, the respective keys can be operated to input the settling conditions.
The set position key 122 includes “RY1”, “RY2”, and “RY1” used to specify a protection relay to be set.
.., "RYn" keys are displayed. Setting function key 12
4 displays keys of “settling start”, “writing”, and “operation start”. The numeric keypad 126 contains “from 0”
A 9 "numeral key and a decimal point key are displayed. The setting operation using these keys will be described later.

A portable human interface 200 is connected to the portable tool connector 150 via a connection cable. The portable human interface 200 includes a keyboard 210 and a flat display 220. The portable human interface 200 has a mouse 2 for input.
30 are connected. Further, a printer (not shown) can be connected to the portable human interface 200. Note that the printer may be built in the portable human interface 200.

Next, the internal configuration of the protection relay device 100 and the portable human interface 200 shown in FIG. 1 will be described with reference to FIG.

FIG. 2 is a block diagram of the internal configuration of the protection relay device and the portable human interface according to one embodiment of the present invention.

First, the internal configuration of the protection relay device 100 will be described. The relay calculation CPU 150 is connected to the A / D converter 160 via the system bus 155. The A / D converter 160 takes in current information and voltage information on the power system side used for the relay operation input via the analog input filter 165 and converts it into a digital amount. The current information and voltage information on the power system side converted into the digital amount are taken into the relay calculation CPU 150 via the system bus 155. Breaker contacts 30
External device information such as circuit breaker on / off information and multi-layer value from 0 is digitally input (DI) as a digital signal.
The data is fetched from the circuit 170 and is fetched to the relay calculation CPU 150 via the system bus 155.

The setting operation of the protection relay is performed from the setting operation panel 110, and the setting conditions of the protection relay are stored in the storage circuit (MEM) 175 via the system bus 155.

The CPU 150 for relay operation calculates power based on current information and voltage information on the power system side used for relay operation input through the analog input filter 165 in accordance with the settling conditions stored in the storage circuit (MEM) 175. A digital output (DO) circuit 18 for monitoring the system and outputting a circuit breaker trip command when the settling condition is satisfied.
Activate the protection relay 310 via 0 to perform tripping of the circuit breaker.

Further, the relay operation CPU 150 is connected to an RS232C interface circuit 185 via a system bus 155, and the RS232C interface circuit 185 is connected to the portable human interface 2 via a portable tool connector 140.
00 is connected to the RS232C interface circuit 235.

Next, the internal configuration of the portable human interface 200 will be described. The CPU 240
The protection relay device 10 is connected to the RS232C interface circuit 235 via the system bus 245.
A setting operation for 0, reading of the setting conditions stored in the protection relay device 100, and the like can be performed.

The keyboard 210 is connected to a keyboard interface circuit 250. The keyboard interface circuit 250 is connected to the CPU 240 via a system bus 245. Therefore, by operating the keyboard 210, the information is stored in the CP.
It is taken in by U240. Flat display 220
Are connected to a display interface circuit 255, and the interface circuit 255 is connected to the CPU 240 via a system bus 245. In response to a command from the CPU 240, a display for the settling operation is performed on the flat display 220. Regarding the screen displayed on the flat display 220,
As will be described later, the screen is composed of a set position key, a set function key, and numeric keys in the same manner as the screen displayed on the touch panel display 120. Also,
The input mouse 230 is connected to the interface circuit 260, and the interface circuit 260
It is connected to the CPU 240 via the system bus 245. By operating the input mouse 230,
A desired key is selected from the screen displayed on the flat display 220, and the information is taken into the CPU 240 via the interface circuit 260, so that a key operation corresponding to the key on the screen can be performed.

A control program for controlling the CPU 240 is stored in the ROM 265.
Controls the portable human interface 200 according to the control program. By performing a settling operation using the flat display 220 and the input mouse 230, the settling conditions are stored in the RAM 270.

When the history of the settling operation is to be displayed again after the end of the settling operation, the settling conditions stored in the RAM 270 are read out by the CPU 240 and displayed on the flat display 220 via the display interface circuit 255. As a result, the setting history can be displayed and its contents can be confirmed. Further, the settling condition stored in the RAM 270 is read by the CPU 240,
By outputting to the externally connected printer 320 via the printer interface circuit 275, it is possible to print out and confirm the setting history in a printed state. When the printer is not only an external printer but also has a built-in printer 280 in the portable human interface 200, the printer 280 can print out the data by outputting to the printer 280 and check the set history of the printer in a printed state. .

A floppy disk interface 285 is connected to the system bus 245.
The setting history read from the RAM 270 can be stored in the floppy disk 290 via the floppy disk interface 285.

Next, a specific method of the settling operation will be described with reference to FIGS.

FIG. 3 is a display example of the flat display 220 of the portable human interface 200 according to one embodiment of the present invention.

FIG. 3 shows an example of the setting screen, in which relay element selection keys 222a, 222b, 222
c, 222d and 222e are protection relays "R", respectively.
Y1 "," RY2 "," RY3 "," RY4 "and"
RY5 "key. The setting function key 224a,
Reference numerals 224b and 224c denote keys for "settling start", "writing", and "operation start", respectively. Numeric keys 226 indicate numeric keys “0” to “9”, “decimal point” keys, and “clear (CLR)” keys. In addition to screen display with these key functions, protection relay
Current set values SET1, SET2, SE of "RY1", "RY2", "RY3", "RY4" and "RY5"
Set value display field 22 for displaying T3, SET4, SET5
8a, a new set value display field 228b for displaying a value newly set during the set operation, and a status display field 228c for displaying the apparatus status such as during settling are provided.

The relay element selection keys 222a, 222b,
222c, 222d, 222e, setting function key 224
The cursor 229 displayed on the flat display 220 is moved up, down, left, and right by the mouse 230. For example, when "RY1" is selected by the relay element selection key 222a, the numeric keys a, 224b, 224c, and the numeric keypad 226 are moved to this position. Move the cursor 229 and move the mouse 230
Click to select.

Next, a setting operation using the flat display 220 will be described with reference to FIG.

FIG. 4 is a flowchart of the settling operation by the portable human interface 200 according to one embodiment of the present invention.

Portable human interface 200
Is connected to the portable tool connector 140, and when the power is turned on, the portable human interface 200
CPU 240 performs initial processing in step 400. When the initial processing is completed, the CPU 2
40 displays a main menu on the flat display 220. On the main menu, processing contents to be selected such as settling processing, inspection processing, and settling display processing are displayed. Next, the CPU 240 determines in step 404
The menu selection key is accepted. This is performed by moving the cursor 229 with the mouse 230 from the processing menu such as the setting processing, the inspection processing, and the setting display processing displayed on the flat display 220, and selects, for example, the setting processing. This is done by:

When the settling process is selected, step 410
, The display example shown in FIG. 3 is displayed on the flat display 220.

Next, CPU 240 accepts a key input in step 412. For example, in the display example of the flat display 220 in FIG. 3, when the setting start key of the setting function key 224a is selected, the cursor 229 is moved to this display position, and when the mouse 230 is clicked, the setting start key 224a is displayed. Is selected by the CPU 240. When the key is accepted, in step 414, CPU 240 converts the accepted key into a key code.

FIG. 5 shows the key code conversion.
This will be described with reference to FIG.

FIG. 5 is an explanatory diagram of the key code conversion at the time of the settling operation by the portable human interface 200 according to one embodiment of the present invention.

In the assignment of operation key codes, of the four-digit code, the upper two digits represent the type, and the lower two digits represent the consistent number. As the type, “01” is assigned to the relay element, “02” is assigned to the function selection key, and “03” is assigned to the numeric keypad.

Therefore, the protection relay RY of the relay element key
1, “0101” is assigned to the protection relay RY2 of the relay element key, and “0102” is assigned to the protection relay RY3 of the relay element key.
"3" is assigned and the protection relay RY of the relay element key is assigned.
4, “0104” is assigned, and “0105” is assigned to the protection relay RY5 of the relay element key.

The setting start key of the function selection key includes "02
"012" is assigned to the operation start key of the function selection key, and "0203" is assigned to the write key of the function selection key.

The numeric keypad “0” is assigned “0301”, the numeric keypad “1” is assigned “0302”, the numeric keypad “2” is assigned “0303”, and the numeric keypad “0303” is assigned. “0304” is assigned to “3”, “0305” is assigned to “4” of the numeric keypad, “0306” is assigned to “5” of the numeric keypad, and “6” is assigned to “6” of the numeric keypad. , "0307", "0308" is assigned to the numeric keypad "7", "0309" is assigned to the numeric keypad "8", and "030A" is assigned to the numeric keypad "9". "030B" is assigned to the "decimal point" of the numeric keypad.
Is assigned, and “030C” is assigned to “clear (CLR)” of the numeric keypad.

Returning again to step 414 in FIG. 4, "0201" is set for the settling start key selected earlier.
Is converted to the code of “0201”. Next, at step 416, C
The PU 240 writes the converted code in the RAM 265. At step 418, the set value is written to the new set value display field 228b. In the next step 420, CPU 240 determines whether or not settling is completed. This determination is made based on whether or not the operation start key 224c of the function selection keys has been pressed in the previous key input reception step 412. If not, steps 412 and 41 are sequentially performed for subsequent key inputs.
4,416,418 are repeated.

When the operation start key 224c is pressed, the CPU 240 executes an operation start process in step 422. In the operation start processing, the settling conditions stored in the RAM 270 are fetched into the CPU 150 of the protection relay device 100 via the RS232C interface 235 and the RS232C interface 185, are stored in the storage circuit 175, and thereafter, the analog filter 165 The current or voltage information of the power system input via the power supply is monitored based on the new settling condition. At the same time, the protection relays “RY1”, “RY”
2 ”,“ RY3 ”,“ RY4 ”and“ RY5 ”at the current set values SET1, SET2, SET3, SET4, S
A new set value is displayed in the set value display field 228a that displays ET5, and the status display field 228c that displays the apparatus status such as during settling is turned off.

Next, the settling operation procedure will be described with reference to FIG.

FIG. 6 is a model diagram of the settling operation procedure by the portable human interface 200 according to one embodiment of the present invention.

First, the settling start key 500 is selected (81a). Next, the key 502 of the protection relay RY2 is selected from the set position keys (82a). When the set value of the protection relay RY2 is set at "15", the key 504 of the number "1" and the key 506 of the number "5" are successively selected (83a, 84a). Since the setting of the protection relay RY2 has been completed, the write key 508 is selected in the sense of the end (85).
a). In this example, to set the protection relay RY5 continuously, the key 510 of the protection relay RY5 and the numeral "1" are set.
Key 512, the key 514 of the number "0" and the key 516 of the number "0" are selected, and the set value "100" is selected.
The write key 518 is selected (86a, 87a, 88
a, 89a, 810a). As described above, the operation start key 520 is finally selected to end the settling operation (81).
1a).

By a series of sequences as described above,
When the settling operation is performed, the key operation is simultaneously converted into a code. The code contents stored in the RAM 270 will be described with reference to FIG.

FIG. 7 is a memory map of the portable human interface 200 according to one embodiment of the present invention.

At the address 00, the code “0201” corresponding to the settling start key 500 is stored (81), and at the address 02, the code “0102” corresponding to the key 502 of the protection relay RY2 is stored ( 82) In the address 04, the code "0302" corresponding to the key 504 of the numeral "1" is stored (83), and in the address 06, the code "032" corresponding to the key 506 of the numeral "5" is stored.
06 is stored (84), a code “0203” corresponding to the write key 508 is stored in the address 08 (85), and a code “0105” corresponding to the key 510 of the protection relay RY5 is stored in the address 0A. Is stored (8
6) The code “0302” corresponding to the key 512 with the number “1” is stored at the address 0C (87), and the code “0301” corresponding to the key 514 with the number “0” at the address 0E. Is stored (88), and “03” of the code corresponding to the key 516 of the numeral “0” is stored in the address 10.
01 ”is stored (89), the code“ 0203 ”corresponding to the write key 518 is stored in the address 12 (810), and the code“ 0202 ”corresponding to the operation start key 520 is stored in the address 14. (81
1).

Next, returning to the flowchart shown in FIG. 4 again, when the inspection processing is selected in step 404, the CPU proceeds to step 430 in step 430.
240 performs an inspection process, the details of which are omitted.

If the set history display processing is selected in step 404, the CPU 2 proceeds to step 440.
40 is a flat display 22 for displaying “settling history display”.
In addition, the process of displaying the history of the settling operation is performed in accordance with the following steps in addition to displaying it as 0.

At step 442, CPU 240
Sequentially reads the log of the settling operation stored in the RAM 270. When the settling operation is performed by the portable human interface 200, the RAM 27
Although the settling condition is stored at 0, the protection relay device 10
When the settling condition is input from the touch panel display 120 of “0”, the settling condition is stored in the storage circuit 175, and therefore it is necessary to temporarily transfer the settling condition from the storage circuit 175 to the RAM 270.

Reading is performed by reading codes one by one from the head address of the address map shown in FIG. The read code is stored in step 444.
Is converted by the CPU 240 into operation keys corresponding to the key codes. This conversion is performed by inversely converting the key code allocation shown in FIG. Next, step 44
In 6, the CPU 240 displays the converted operation keys on the flat display 220 via the display interface 255. The display of this history is
In step 448, steps 442, 444, and 446 are repeated in this order until it is determined that reading has been completed. When the operation start key is read, the reading ends.

A display example of the settling history read out and displayed on the flat display 220 as described above will be described with reference to FIG.

FIG. 8 is a display example of the settling operation history displayed on the flat display 220 of the portable human interface 200 according to one embodiment of the present invention.

The start date and time of the settling operation are displayed on the flat display 220 together with the title of "Operation Details List". Thereafter, the contents of the operation procedure described with reference to FIG. 6 are displayed.

That is, first, it is displayed that the settling start key 600 has been selected (81b). Next, it is displayed that the key 602 of the protection relay RY2 is selected from among the set position keys (82b). Protection relay RY
Since "15" is set as the set value of 2, the key 604 of the number "1" and the key 606 of the number "5" are displayed side by side (83b, 84b). Thus, the write key 608 is displayed to indicate that the setting of the protection relay RY2 has been completed (85b). Subsequently, the key 610 of the protection relay RY5 is displayed (86b), and as its set value, the key 612 of the number "1", the key 614 of the number "0", and the key 616 of the number "0" are displayed side by side.
It is displayed that the set value “100” has been selected (87).
b, 88b, 89b). Further, a write key 618 and an operation start key 620 for ending the settling operation are displayed (810b, 811b).

As described above, the contents of the setting operation can be displayed on the flat display 220, so that the contents of the setting operation can be confirmed again after the setting, and the reliability of the setting operation is improved.

In the above description, the setting operation history is displayed on the flat display. However, the history can be output to a printer. The method will be described with reference to step 458 and subsequent steps in FIG.

At step 450, CPU 240
Displays the "setting history print" on the flat display 220, and sequentially prints out the history of the setting operation according to the following steps.

At step 452, CPU 240
Sequentially reads the log of the settling operation stored in the RAM 270. Reading is performed by reading codes one by one from the head address of the address map shown in FIG. The read code is stored in step 454.
Is converted by the CPU 240 into operation keys corresponding to the key codes. This conversion is performed by inversely converting the key code allocation shown in FIG. Next, step 45
In 6, the CPU 240 prints out the converted operation keys on the flat display 220 via the display interface 255. The printout of the history is performed in steps 452, 454, and 4 until it is determined in step 458 that the reading is completed.
This is repeated in the order of 56. When the operation start key is read, the reading ends.

The printout example of the setting history read out and printed out on the flat display 220 as described above is the same as that shown in FIG.

In the above description, the setting operation is performed using the portable human interface 200. However, the setting operation is performed using the setting operation panel 110 of the protection relay device 100, and the history of the setting operation is displayed. Etc., when the portable human interface 200
May be used. The method of the operation can be performed in the same manner as the above-mentioned method by touching a predetermined position of the setting position key 122, the setting function key 124, or the numeric keypad 126 shown on the touch panel display 120 with a fingertip. Since the set value is directly stored in the storage circuit 175, when displaying the set history,
After the contents of the storage circuit 175 are loaded into the RAM 270, they can be sequentially displayed and printed in the same manner as described above.

According to this embodiment, the contents of the settling operation can be displayed on the flat display, and the contents of the settling operation can be printed out on the printer. Can be confirmed, so that the reliability of the settling operation is improved.

[0076]

According to the present invention, the reliability of the setting operation of the protection relay device can be improved.

[0077]

[Brief description of the drawings]

FIG. 1 is an external view of an entire system of a protection relay device and a portable human interface of the protection relay device according to an embodiment of the present invention.

FIG. 2 is a block diagram of an internal configuration of a protection relay device and a portable human interface of the protection relay device according to an embodiment of the present invention.

FIG. 3 is a display example of a flat display of a protection relay device and a portable human interface of the protection relay device according to an embodiment of the present invention.

FIG. 4 is a flowchart of a setting operation of a protection relay device and a portable human interface of the protection relay device according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram of a protection relay device according to an embodiment of the present invention and a key code conversion at the time of settling operation by a portable human interface of the protection relay device.

FIG. 6 is a model diagram of a protection relay device according to an embodiment of the present invention and a settling operation procedure using a portable human interface of the protection relay device.

FIG. 7 is a memory map of a protection relay device and a portable human interface of the protection relay device according to an embodiment of the present invention;

FIG. 8 is a display example of a setting history displayed on a flat display of a protection relay device and a portable human interface of the protection relay device according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 protection relay device 110 setting operation panel 120 touch panel display 122 setting position key 124 setting function key 126 numeric keypad 130 integrated display LED unit 135 push button 140 portable tool connection connector 200 portable human Interface 210: Keyboard 220: Flat display

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-3-145917 (JP, A) JP-A-6-307921 (JP, A) JP-A-7-111726 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H02H 3/02

Claims (7)

(57) [Claims] A protection relay device; input means for inputting an operation for setting operation conditions of the protection relay device; conversion means for converting the contents of the settling operation input by the input means into codes; A protection relay device comprising: storage means for storing a converted code; and display means for reading the code stored in the storage means, performing an inverse conversion, and displaying the data as a set operation history data. History display device. 2. The history display device for a protection relay device according to claim 1, wherein said display means is a portable human interface, and said portable human interface is connected to said protection relay device, so that the setting operation history is displayed. A history display device of the protection relay device, characterized by being able to display a message. 3. The protection relay device according to claim 2, wherein the portable human interface has the functions of the input unit, the conversion unit, and the storage unit. Device history display device. 4. The history display device for a protection relay device according to claim 1, wherein the input means is arranged on a front panel of the protection relay device. 5. The history display device for a protection relay device according to claim 1, wherein the input means is a display corresponding to a key displayed on a flat panel, and the key is selected by selecting a corresponding key part of the display. A history display device of the protection relay device, characterized by inputting. 6. The history display device of a protection relay device according to claim 1, wherein the input unit includes a setting position key for specifying a protection relay to be set, a setting function key for specifying a setting operation, and a numeric keypad for inputting a numerical value. And a history display device of the protection relay device. 7. The history display device of the protection relay device according to claim 1, further comprising: a printing unit that reads out a code stored in the storage unit, performs an inverse conversion, and prints out as a log data of the settling operation. A history display device for a protection relay device, comprising: