JPS5853798B2 - Test data display method in banknote authenticity discrimination device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a test data display method for a banknote authenticity determination device, and in particular, for testing a sensor that reads banknote patterns in a banknote authenticity determination device installed in a currency exchange machine, an automatic teller machine, etc. The present invention relates to a test data display method in a banknote authenticity determination device that displays the output voltage of a sensor (commonly known as an idle voltage).

2. Description of the Related Art Recently, in banks and the like, as demands for labor saving and automation have increased, money exchange machines, automatic down payment machines, etc. that automatically determine the authenticity of banknotes and process transactions have become increasingly popular.

In addition, for the purpose of saving labor in selling goods, automatic vending machines that display the amount of money put into the machine and dispense goods with prices within the range of the put-in money have been put into practical use.

In such exchange machines, there is a display on the customer service side that displays the deposited amount, remaining amount, amount that can be exchanged, etc., and the user can exchange money by operating the switch corresponding to the desired amount of exchange on the operation section. When this is done, the amount of money exchanged, etc. will be displayed on the display.

Furthermore, when a customer inserts a banknote into the exchange machine, a built-in pill checker determines whether the banknote is genuine or not.

This pill checker is equipped with a plurality of sensors to read the pattern and length of banknotes.

The idle voltage of these sensors is so small that it is typically amplified by an amplifier.

However, in order for the sensor to accurately read the banknote pattern and length, it is necessary to adjust the degree of amplification by operating a variable resistor included in the amplifier so that the idle voltage becomes an appropriate voltage.

For this reason, conventionally, when maintaining currency exchange machines, for example, a measuring device such as a tester, synchroscope, or memory scope was connected to the output of each sensor and the idle voltage was measured and adjusted.

Therefore, each time the user went to maintain a currency exchange machine or the like, he or she had to bring measuring instruments with him, which was troublesome.

Accordingly, the present invention provides a test data display method in a banknote authenticity discriminating device that allows the idle voltage of each sensor to be simply and easily adjusted by displaying the idle voltage of the sensor on the amount display on the customer service side.

To summarize, the present invention includes a first mode in which the authenticity of a banknote is determined by an authenticity determination means, and a second mode in which the outputs of a plurality of detection means for detecting the length or pattern of the banknote are tested. A switching means is provided, and when the switching means is switched to the second mode, the output voltages from the plurality of detection means are used as test data to be displayed on the amount display.

Below, a case in which the present invention is applied to a money changer will be specifically explained.

FIG. 1 is a front panel layout diagram of a money changer to which an embodiment of the present invention is applied.

In the figure, the front panel 10 of the exchange machine includes a handling display 11 that indicates that the exchange machine is in operation, a bill insertion slot 12 into which high-value bills to be exchanged are inserted, and an operation section 13.
A plurality of amount displays 14 for displaying amounts and an error display 15 for displaying errors are provided.

The operation unit 13 includes a 1,000 yen bill number selection switch 131 for selecting the number (1, 5, 10) when exchanging high-value banknotes (10,000 yen) into 1,000 yen bills, for example, and a 500 yen 500 yen bill number selection switch 132 for selecting the number of bills, and the number of 100 yen coins wrapped in 50 100 yen coins (
A 100 yen coin number selection switch 133 selects the number of packets of 50 yen coins (1, 2, 4), a 50 yen coin number selection switch 134 selects the number of packets of 50 yen coins, and a switch 134 selects the number of packets of 10 yen coins. A selection switch 135 for selecting the number of ten yen coins to be selected, and a remaining balance command switch 136 that selects the denomination and quantity of high-value banknotes to be exchanged, and then instructs the remaining amount to be exchanged to a predetermined denomination of banknotes (for example, a thousand yen bill). Selection switch 131 to 1
35, and a correction switch 137 for issuing a command to correct an erroneous operation.

Each of these selection switches 131 to 135 for each denomination type is engraved with an amount corresponding to the number of coins or the number of coins, and when the switch is pressed, a built-in lamp lights up to indicate the selected exchange amount. Configured to inform the customer of the amount of the type.

The amount display 14 includes a deposit amount display 141 that displays the amount that the customer has inserted into the bill insertion slot 12, and a deposit amount display 141 that displays the remaining amount when the customer specifies a desired low-denomination currency to be exchanged with the inserted high-value banknote. a remaining amount display 142 to display the remaining amount, and a 1,000 yen bill exchange amount display 14 to display the amount converted into 1,000 yen bills.
3, a 500 yen bill exchange amount display 144 that displays the amount of money exchanged into 500 yen bills, a 100 yen coin exchange amount display 145 that displays the amount of money exchanged into 100 yen coins, and a 500 yen bill exchange amount display 145 that displays the amount of money exchanged into 500 yen coins. A fifty-yen coin exchange amount display 146 displays the amount of money exchanged, and a ten-yen coin exchange amount display 147 displays the amount of money exchanged into ten-yen coins.
It consists of

Incidentally, this amount display 14 is also used as a display for displaying the idle voltage of the sensor and an error code, as will be explained later with reference to FIG.

FIG. 2 is a block diagram of a money changer to which an embodiment of the present invention is applied.

In the configuration, a central processing unit (hereinafter referred to as CPU') 41
The operation is controlled based on a program stored in advance in a read-only memory (hereinafter referred to as ROM) 39.

In connection with this CPU 41, the normal exchange mode and the sensors S1 to S5. A mode changeover switch 42 is provided as a switching means for switching between the idle voltages of H1 to H4 and a test mode for testing authenticity determination.

The sensor S1 detects that the banknote 21 is inserted into the pill checker 2, and the sensor S2 detects the timing at which the banknote pattern is read when the banknote is inserted into the banknote insertion slot 12 and transported and reaches a predetermined position. S3゜4.5 are combined to detect banknotes 21
This is to detect the 0 width.

Sensors H1 to H3 are optical sensors, and sensor H
Sensors 1 and 2 detect the amount of light transmitted when the banknote 21 is irradiated with light, and a sensor H3 detects the color tone of the printed surface of the banknote 21.

Further, the sensor H4 is a magnetic sensor, and detects the magnetic distribution on the printed surface of the banknote 21.

When the sensor S1 detects the banknote 21, the position sensor reading circuit 22 derives a high level (hereinafter referred to as "H") signal to notify the CPU 41 that the banknote 21 has been conveyed into the pill checker 2. , AND gate 24
is opened and AND gate 29 is closed.

The pulse generator 23 is provided in association with a motor (not shown) for conveying the banknotes 21, and generates pulses (shown in FIG. 5a, which will be described later) in synchronization with the conveyance speed of the banknotes 21.

The clock pulse generation circuit 27 sets the changeover switch 42 to the test mode, and displays the sensors H1 to H on the display section 14.
When adjusting the idle voltage by displaying the idle voltage of No. 4, it is difficult to see if the display changes frequently, so a clock pulse with a relatively long period is generated to make the display change gradually.

'The counting circuit 26 counts the clock pulses from the pulse generator 23 only while the banknote 21 is inserted into the pill checker and the sensor S2 detects the length of the banknote 21 from one end to the other.

Therefore, the counting output of the counting circuit 26 becomes data correlated to the length of the banknote 21.

Further, the counting circuit 26 counts clock pulses from the clock pulse generating circuit 27 in the test mode.

The count output of the upper two bits from the counting circuit 26 is decoded by a decoder 30, and the output of the decoder 30 is applied to a multiplexer 31 and gates 361 to 364.

The multiplexer 31 selects the idle voltage from the sensors H1 to H4 based on the output of the decoder 30, and supplies the selected idle voltage to the A/D conversion circuit 32 to convert it into a digital value.

The idle voltage converted into a digital value is given to the memory 35 as a bit-parallel read pattern signal by the serial/parallel conversion circuit 33.

The counting output of the counting circuit 26 is given to an address setting circuit 34.

This address setting circuit 34 is constituted by, for example, a DMA circuit, and specifies the address of the memory 35.

Writing or reading from the memory 35 is controlled via a control bus CB connected to the CPU 41.

The gates 4361 to 364 are closed in the exchange mode and opened in the test mode to transfer the bit-parallel idle voltage from the serial-to-parallel converter circuit 33 to the register 384.
387.

In addition, the panel control circuit 37 uses the CPU when in the exchange mode.
The deposited amount data, remaining amount data, and exchangeable data of 1,000 yen to 1,000 yen given from 41 are given to registers 381 to 387, respectively.

This panel control circuit 37 is prohibited from deriving data to be applied to registers 384 to 387 in the test mode.

In addition, the panel control circuit 3γ includes a customer service selection switch 1.
3 is connected.

Furthermore, in connection with the CPU 41, there is a bill dispensing machine 43 for discharging the exchanged banknotes, a coin discharging machine 44 for discharging the exchanged coins, and a banknote discharging machine 44 for discharging exchanged coins, and a banknote discharging machine 44 for discharging exchanged coins. A banknote storage machine 45 for storing banknotes determined as genuine banknotes, and a banknote transport device 46 for transporting banknotes inserted into the banknote insertion slot 12 are provided.

FIG. 3 is a block diagram of an amplifier circuit for amplifying the idle voltage of a sensor included in a money changer to which an embodiment of the present invention is applied.

In the figure, since this block diagram is a well-known technology, only an outline will be described.

The outputs of the sensors S1 to S5 and H1 to H4 are applied to a ripple removal circuit 51 to remove ripples.

Thereafter, the signal is supplied to the waveform shaping circuit 52, where the waveform is shaped and amplified.

This waveform shaping circuit 52 includes a variable resistor 52 for level adjustment.
By adjusting this variable resistor 521, the level of the idle voltage derived from the waveform shaping circuit 52 can be varied.

FIG. 4 is a diagram schematically showing data stored in the memory shown in FIG. 2.

In the figure, the memory 3 includes a banknote reading pattern storage area 351 that stores the reading pattern read from the banknote 21 (that is, the idle voltage from the waveform shaping circuit 52), and the amount of light transmitted, color tone, magnetic distribution, etc. for each denomination. a storage area 352 that stores model patterns of the banknotes, a storage area 353 that stores allowable range data for the length of banknotes by denomination, a storage area 354 that stores the allowable range of the idle voltage of each sensor, and the deposited amount and remaining amount. It includes a storage area 355 for storing exchange data such as the amount by denomination, the number of coins, and the number of coins, and a storage area 356 for storing an error code (described in detail in FIG. 5 below).

FIG. 5 is a diagram showing a state in which the idle voltage, error code, etc. of each sensor are displayed on the display section according to an embodiment of the present invention.

In the figure, the most significant digit of the deposited amount display 141 displays the mode in which the banknote 21 was read by each sensor.

That is, when the number is "0", the reading mode is normal, when the number is "1", the length of the banknote 21 is abnormal, and when the number is "2", the reading result of the sensor H1 is an error, and the number is "3". ” similarly indicates that sensor H2 is in error, the numerical value “4” indicates that sensor H3 is in error, and the numerical value “5” indicates that sensor H3 is in error.
” indicates an error in sensor H4, and the value “6” indicates sensor S
3, 4, and 5 indicate that the width of the banknote 210 read is abnormal.

Further, length data of the banknote 21 is displayed in the second to fourth digits of the deposited amount display 141.

The error details are displayed in the upper two digits of the remaining amount display 142.

In other words, when the display is "OO", it is normal; a value of "11" indicates that the idle voltage of sensor H1 is outside the permissible range; similarly, a value of "12" indicates that the idle voltage of sensor H2 is outside of the permissible range. Yes, the number "13" is sensor H
3 is outside the permissible range, the numerical value "14" indicates that the sensor H4 is outside the permissible range, and the numerical value "21" indicates that the sensor S1 is outside the permissible range.
The on/off operation of sensor S2 is defective, and the numerical value "22" indicates that the on/off operation of sensor S2 is defective.

Display 144 displays the idle voltage of sensor H1, display 145 displays the idle voltage of sensor H2, display 146 displays the idle voltage of sensor H3, and display 147 displays the idle voltage of sensor H4. Idle voltage is displayed.

FIG. 6 is a waveform diagram of clock pulses generated from the pulse generator 23 and clock pulse generation circuit 27 shown in FIG. 2.

FIGS. 7A and 7B are flowcharts for explaining the operation of an embodiment of the present invention, in particular, FIG. 7A shows the exchange operation mode, and FIG. 7B shows the test mode.

First, the exchange mode will be explained with reference to FIGS. 1 to 7A, but it should be pointed out in advance that this exchange mode is not the gist of the present invention.

First, when the power is turned on and the mode changeover switch 42 is set to the exchange mode, initial processing at the time of power-on is performed.

That is, in addition to performing a sum check, checking the memory 35, and checking the voltage of a battery (not shown) to prevent data stored in the memory 35 from being destroyed when the power is cut off, the counting circuit 26 and initial reset of registers 381 to 387.

After that, check whether the clock pulse is normally generated from the pulse generator 23 or not.
4. Perform an idle check to see if the banknote transport device 46 or the like is clogged with coins or the like.

Then, the CPU 41 determines whether they are normal or not, and if they are normal, the error lamp 15 is turned on to notify the staff.

After lighting the error lamp 15, the CPU 41 determines whether the mode changeover switch 42 is set to the test mode.

If it is in the test mode, it waits, and if it is in the test mode, it proceeds to the test subroutine shown in FIG. 7B.

If the idle check is normal, it is determined whether the mode changeover switch 42 is set to test mode.

If it is run in the test mode, the contents of the registers 381 to 387 are displayed on the displays 141 to 147.

At this time, since all registers 381 to 387 have been reset, all zeros are displayed on the display section 14.

Further, the CPU 41 determines whether the sensor S1 has detected that the banknote 21 has been inserted into the pill checker.

If the sensor S1 does not detect the bill 21, it returns to the initial state and waits. When the sensor S1 detects that the bill 21 has been inserted, the bill 21 is taken in by the bill conveying device 46 and the authenticity is determined.

That is, when the sensor S2 detects the bill 21, the position sensor reading circuit 22 opens the AND gate 24 and provides the clock pulse a from the pulse generator 23 to the counting circuit 26 via the OR gate 25.

The counting circuit 26 counts the clock pulses a only while the banknote 21 is being conveyed and the sensor S2 is detecting the banknote 21 from one end to the other end in the longitudinal direction.

Therefore, the count value of the counting circuit 26 is stored in the storage area 351 of the memory 35 as length data of the banknote 21.

Further, the count value of the upper two bits of the counting circuit 26 is applied to a decoder 30, decoded, and applied to a multiplexer 31 and gates 361 to 364.

Since the multiplexer 31 is given reading pattern data from the sensors H1 to H4, the reading pattern is selected based on the decoded output and given to the A/D conversion circuit 32 to be converted into a digital value. Ru.

This digital value is given to the serial/parallel conversion circuit 33,
The data is stored in the storage area 351 of the memory 35 as bit-parallel read pattern data.

The CPU 41 compares the length data stored in the storage area 351 of the memory 3 with the length permissible range data for each denomination stored in advance in the storage area 353, and determines whether the length of the banknote 21 is within the permissible range. compare.

Furthermore, it is determined whether the banknote 21 is a genuine banknote by comparing the banknote reading pattern stored in the storage area 351 with model patterns such as the amount of light transmission, magnetic distribution, and color tone of the banknote stored in advance in the storage area 352. At the same time, the denomination of the banknote 21 is determined.

If you throw away a genuine bill, put the bill 21 into the bill return slot (not shown).
Return it to return to the initial state.

If it is a genuine bill, its amount data is stored in the storage area 355 as deposited amount data.

The CPU 41 sends the deposited amount data to the panel control circuit 3.
7, the deposited amount is stored in the register 381 and displayed on the deposited amount display 141.

Next, the customer selects the selection switch 131 or 1 on the operation section 13.
35 to select the desired exchange amount.

In response, the CPU 41 determines whether the remaining banknote switch 136 has been operated.

If the remaining banknote switch 136 is operated here, the deposited amount data is added to the amount data by denomination in the storage area 355.

Then, the deposited amount data is subtracted from the remaining amount data, and the exchangeable amount data is displayed on the specified amount display units 143 to 147 for each denomination.

If the remaining banknote switch 136 is not operated, it is determined whether the deposited amount data is in units of 500 yen.

If the amount is in units of 500 yen, 500 yen will be subtracted from the remaining amount.

That is, since the deposited amount has not yet been exchanged at all, the deposited amount and the remaining amount are equal.

Thereafter, 500 yen is added to the amount data by denomination of 500 yen in the storage area 355.

Furthermore, the amount data obtained by subtracting 500 yen from the deposit amount is added to the remaining amount data in the storage area 355, making the remaining amount data 0 yen.

Furthermore, amount data for each selected denomination is stored in registers 383 to 387 via panel control circuit 3γ.

The denomination-specific data stored in the registers 383 to 387 are displayed on the displays 143 to 147, respectively.

Further, remaining amount data is stored in the register 382 via the panel control circuit 37 and displayed on the display 142.

The CPU 41 determines whether or not the designation for currency exchange has been completed. If not, the CPU 41 waits until the customer next operates the selection switch 13. If the designation is complete, the CPU 41 sends the exchanged currency to the banknote dispenser. 43 or a hardening release machine 44.

Furthermore, the banknotes inserted into the banknote insertion slot 12 by the customer are stored in the banknote storage machine 45.

If exchange bills or exchange coins cannot be ejected normally from the bill dispenser 43 or coin dispenser 44, or if the bill storage machine 45
When the bank is full and new banknotes cannot be stored, or when the ejected banknotes are not removed within a predetermined time, it is determined that the system is not operating normally and an error lamp 15 is lit to call an attendant.

If the process is completed normally, the process waits until the next customer inserts a banknote for exchange into the banknote insertion slot 12.

In this way, the series of operations for exchanging money is completed.

Next, a test mode which is a feature of the present invention will be explained with reference to FIG. 7B.

First, the mode selector switch 42 is switched to test mode.

Here, the operation when testing the idle voltage of each sensor without inserting the banknote 21 into the banknote insertion slot 12 will be described.

By switching the mode changeover switch 42 to the test mode, the AND gate 29 and the gates 361 to 3
64 is opened, and the derivation of data given from the panel control circuit 37 to the registers 384 to 387 is prohibited.

Moreover, since the banknote 21 is not inserted, the sensor S2 does not detect the banknote 21, and the position sensor reading circuit 22 derives a low level (hereinafter referred to as "L") signal.

This "L" signal is inverted by the inverter 28 and
Given to D Kate 29.

Then, the AND gate 29 supplies the clock pulse (FIG. 6b) from the clock pulse generation circuit 27 to the counting circuit 26 via the OR gate 25.

The counting output of the counting circuit 26 is stored in the memory 35 as length data in the same manner as described above.

The respective idle voltages of the sensors H1 to H4 are stored in the banknote reading pattern storage area 351 of the memory 3 via the multiplexer 31, the A/D conversion circuit 32, and the serial/parallel conversion circuit 33 in the same manner as described above.

Then, it is determined whether the idle voltage of each sensor stored in the storage area 351 is within the permissible idle voltage range of the read sensor stored in advance in the storage area 354 and is normal.

Furthermore, the outputs of sensors S1 to S5 are connected to the data bus DB.
The CPU 41 reads the on/off output signals of the sensors S1 to S5 into an accumulator (not shown), and determines whether each bit is logical "1" or "
It is determined whether the on/off operations of the sensors S1 to S5 are normal.

If all the determinations are normal, the storage area 3
Error code 00 is stored in 56.

If the idle voltage of sensor H1 is outside the allowable range, an error code "11" is stored, and if the idle voltage of sensor H2 is outside the allowable range, an error code "12" is stored, and the idle voltage of sensor H3 is If the idle voltage of the sensor H4 is outside the allowable range, an error code "13" is stored, and if the idle voltage of the sensor H4 is outside the allowable range, an error code "14" is stored.

Further, if the on/off operation of the sensor S1 is defective, error code 21'' is stored, and if the sensor S2 is defective in the on/off operation, error code 22'' is stored.

Then, the error code stored in the storage area 356 is stored in the register 382 via the panel control circuit 37, and displayed on the remaining amount display 142 as shown in FIG.

Next, the idle voltage of sensors H1 to H4 is displayed on the display 1.
44 to 147.

That is, the sensor H derived from the serial/parallel conversion circuit 33
The idle voltage converted into a 1-bit parallel digital value is stored in the register 384 via the gate 361 and displayed on the 500 yen display 144.

Thereafter, the idle voltages of sensors H2 to H4 are similarly stored in registers 385 to 387 via gates 362 to 364, and displayed on displays 145 to 147, respectively.

Next, it is tested whether the pill checker can normally determine the authenticity of the banknotes 21.

At this time, the clerk inserts the banknote 21 into the banknote insertion slot 12.

When the sensor S1 detects that the banknote 21 has been inserted and the sensor S2 detects the length of the banknote 21 from one end to the other in the longitudinal direction, the AND gate 24 is opened and the AND gate 2 is opened.
9 is closed.

Thereby, the counting circuit 26 counts the clock pulses a from the pulse generator 23.

This counting output is given to the CPU 41.

Then, the CPU 41 reads out length tolerance range data for each denomination stored in advance in the storage area 353 of the memory 3, compares this length tolerance data with the counted value of the counting circuit 26, and determines the length of the banknote 21. Determine if it is within the allowable range.

If the length of the banknote 21 is shorter or longer than the allowable range, an error code 1 indicating that the length is defective is stored in the storage area 356.

Further, the sensors S3, 4, and 5 determine whether the width of the banknote 210 is normal or not, and if the width is abnormal, an error code 6'' is written in the storage area 356.

Next, it is tested whether the sensors H1 to H4 can correctly read patterns such as the amount of light transmitted through the banknote 21, the magnetic distribution, and the color tone.

That is, the pattern information read by the sensors H1 to H4 is sent to the multiplexer 31°A/D conversion circuit 3.
2. Stored in the memory 35 via the serial/parallel conversion circuit 33.

The CPU 41 compares the banknote reading pattern stored in the storage area 351 with model patterns for each denomination stored in advance in the storage area 352, and determines whether or not they match.

If the light transmission amount data does not match, sensor H
1 or H2 is abnormal, the error code is "2" or "3", and if the magnetic distribution data do not match, the sensor H
If the color tone data do not match, the error code "5" is stored in the storage area 356 because the sensor H4 is abnormal.

If all of the above tests are normal, an error code ``0'' indicating normality is stored in the storage area 356.

The error code thus stored in the storage area 356 is stored in the most significant bit of the register 381 by the CPU 41 via the panel control circuit 37, and is displayed on the most significant digit of the deposit amount display 141.

Similarly, the length data of the banknote 21 is sent to the second to fourth bits of the register 381 via the panel control circuit 37.
The amount is stored in bits and displayed in the second to fourth digits of the deposit amount display 141.

Deposit the error code and length data and display the amount display 141
After displaying on the banknote, if the authenticity determination is normal and the banknote is thrown away, the banknote 21
is returned, and if the banknotes 21 are normal, the banknotes 21 are stored in the banknote storage machine 45.

In this case, since the mode is a test mode, the banknotes 21 may be returned even if the authenticity determination is normal.

This completes the series of operations for testing the pill checker.

As described above, according to the present invention, the idle voltage of the sensor for reading the banknote pattern can be displayed on the amount display simply by switching to the test mode. There is no need to connect a measuring device to the output of each sensor, which saves time and also eliminates the need for a measuring device.

[Brief explanation of the drawing]

FIG. 1 is a front panel layout diagram of a money changer to which an embodiment of the present invention is applied. FIG. 2 is a block diagram of a money changer to which an embodiment of the present invention is applied. FIG. 3 is a block diagram of an amplifier circuit for amplifying the output voltage of a sensor included in a money changer to which an embodiment of the present invention is applied. FIG. 4 is a diagram schematically showing data stored in the memory shown in FIG. 2. FIG. 5 is a diagram showing a state in which error codes, sensor idle voltage, etc. are displayed on the display section according to an embodiment of the present invention. FIG. 6 is a waveform diagram of clock pulses generated from the pulse generator and clock pulse generation circuit included in FIG. 2. FIGS. 7A and 7B are flowcharts for explaining the operation of an embodiment of the present invention. In the figure, 10 is a customer service section, 12 is a bill insertion slot, 13 is a selection switch, 14 is an amount display section, 41 is a central processing unit (CPU), 42 is a mode changeover switch, Sl to S5. Hl to H4 are sensors, 21 is a banknote, 22 is 1
Sensor reading circuit, 23 is a pulse generator, 26 is a counting circuit, 27 is a clock pulse generation circuit, 31 is a multiplexer, 32 is an A/D conversion circuit, 33 is a serial/parallel conversion circuit, 34 is an address setting circuit, 35 is a memory, 361 to 364 are gates, and 37 is a panel control circuit.

Claims (1)

[Claims] 1. A plurality of detection means disposed in a banknote discrimination area for detecting at least the length or pattern of the banknote, and whether the banknote is appropriate based on the output state of the plurality of detection means. A method for displaying test data in a bill authenticity discriminating device including an authenticity discriminating means for discriminating the authenticity of the bill, and an amount display provided in a customer service department for displaying the amount of the bill. comprising a switching means for switching between a first mode for determining authenticity and a second mode for testing the output of the detection means, and in a state in which the switching means is switched to the second mode, the plurality of detection means A test data display method in a banknote authenticity discriminating device in which the output voltage from the banknote is displayed on the amount display as test data. 2. The bill further includes a first error code generating means that generates an error code indicating that the banknote is not a genuine banknote in response to the fact that the authenticity determining means determines that the banknote is not valid; In a state where the banknote is switched to the mode and the banknote is inserted into the banknote discrimination area, the authenticity determining means is caused to determine the authenticity of the banknote, and in response to the authenticity determining unit determining that the banknote is not a proper banknote. 2. A test data display method in a banknote authenticity discriminating device according to claim 1, wherein the error code from the error code generating means is displayed on the amount display. 3. A second method for generating a different error code corresponding to each of the plurality of detection means to indicate that the output voltage is outside the permissible range in response to the fact that the output voltage of each of the plurality of detection means is outside the predetermined permissible voltage range. further comprising error code generating means, wherein when the switching means is switched to the second mode and no banknote is inserted into the banknote discrimination area, the output voltage of each detection means is outside a predetermined permissible voltage range. 2. A test data display method in a banknote authenticity discriminating device according to claim 1, wherein said specific error code is displayed on said amount display depending on the situation.