JPS6013225B2 - Vending machine failure detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention proposes a novel failure detection method and apparatus for detecting failure of a vending machine using sequence control.

Conventional vending machines do not have the function of inspecting each part necessary for the vending operation by themselves, but instead detect abnormalities after the vending operation is actually performed, which is a passive failure detection method. I can say that.

This type of passive failure detection cannot detect many failures unless the sales operation is performed, which is extremely inconvenient for the customer who caused the sales operation, and there is no sufficient failure detection function. I can't say that there is. From this point of view, the present invention provides active failure detection that proactively detects failures by itself.

In this method, immediately before each component of the vending machine operates during one vending operation period, the mechanism is inspected to see if the mechanism is normal by checking the state of the signal output from that part or the reaction caused by sending the signal. It is done by Furthermore, if an abnormality in a component is detected, sales of all or part of the vending machine are suspended depending on the nature of the failure. In addition, "total sale discontinuation" means that the vending machine is completely discontinued, and the reject device is activated and does not accept coins. "Partial sale discontinuation" means that when there are multiple product storage columns, only one column or several Sales of that column have been discontinued, and selective sales of the products in that column are prohibited. Another feature of the present invention is that when a malfunction is detected, it can be easily notified to the administrator of the vending machine by providing an error code. One embodiment will be described in detail below with reference to the drawings.

FIG. 1 shows a block diagram of the device of the present invention, and I3 is a main body control section of a normal vending machine that performs addition of input amount, determination of sales availability, change calculation, and change payout control.

The control device CPU1 is a device that decodes and executes failure detection commands and judges the results, and is connected to all the components that should perform failure detection of the vending machine, and the discussion-only memory ROM2 (or PROM) is connected to the CPU The read/write memory RAM3 stores the processing results of the CPUI, and the input/output device 1'04 is directly connected to each component of the vending machine to communicate with each of these components. It operates to exchange signals with the CPUI. The program is CP
Instruction words consisting of instructions and operands to the UI are stored along addresses, and the CPU UI sequentially reads out each instruction, counts up, and performs processing sequentially. The contents of this failure detection program are shown in the main flowcharts of FIGS. 2A and 2B, and the subroutine of FIG. 2d. In this embodiment, each component of the vending machine whose failure is detected is a coin detection sensor 5 that detects when a coin is inserted from the coin slot, and a main unit that sorts the inserted coins and controls the main unit for each type of coin. A coin switch 6 outputs an addition signal to the section 13, a pen-end sensor 7 detects that the product has been discharged to a state where it can be taken out by a customer upon completion of the sales operation, and a pen-end sensor 7 detects whether the product discharge motor M2 is being driven. Product discharge carrier switch 12 to detect, change dispensing motor M when change is required, main body control unit 13 every time change is dispensed.
A change subtraction sensor 8 outputs a subtraction signal to a change subtraction sensor 8, and a change dispensing sensor 9 detects whether change is dispensed. ing. Therefore, the CPU includes a failure detection means that determines the failure of each component, and a failure detection means that controls the failure detection means to perform a failure detection operation before each of the components that are sequentially activated in the vending operation that starts when coins are inserted. a control means, an error code output means for generating an error code signal indicating an error code corresponding to a component in which a failure has been detected, a display means for displaying an error code on a display based on the error code signal; It also includes a rice sales stop control means that controls the vending machine to be in a state where all sales are stopped or a part of sales is stopped depending on the component. Also, at 1'04 there is a reject device 10.
and a display 11 for displaying an error code are connected.
Next, the operation of the apparatus of the present invention will be explained with reference to flowcharts shown in FIGS. 2A, 2B, 2C, and 2d.

First, when the power is turned on, initial settings are made, the program is started from FIG. 2A, and the failure detection operation of the coin detection sensor 5 is started in the first and second modes. The coin detection sensor 5 has almost the same mechanism as the pen-end sensor 7 and the coin dispensing sensor 9, which will be explained later.As shown in FIG. In this structure, when a coin passes between the two, the content of the signal received by the receiving device 17 changes, thereby detecting the passing of the coin and outputting a coin sensing signal.

Therefore, it is possible to consider a device that uses a structure that sends and receives signals using light, such as a light emitting diode LED and a phototransistor PT, and sends and receives signals using a magnetic field, such as an excitation coil and a detection coil. To detect a failure in the coin detection sensor 5 having such a configuration, in the first mode, the CPU turns off the light emitting diode LED, which is the transmitter 16, and then in the second mode, checks whether the phototransistor PT is turned FF. Failure detection is performed by inspecting. The second mode is a judgment mode, and if it is confirmed that the PT is OFF, the CPU
I advances the program to the third mode, but if it is not confirmed, it is considered a failure and the CPUI causes the program to jump to the subroutine of FIG. 2d. Here, the subroutine will be explained based on FIG. 2d. In the 1' mode, a command to stop all sales of the vending machine is stored in the ROM 2, and the CPU reads this and operates the reject device 10.

The second mode of the subroutine is a mode in which the CPUI stores the error code, and when an error occurs in the second mode of the main flow and jumps to the subroutine, the error code of the second mode is stored in RAM3. be. The error code is stored in the operand of the address that commands the judgment of the second mode of the program, and the C
When an error occurs, the PUI reads and stores this error code. The third mode of the subroutine is a mode in which the error code stored in the RAM 3 is displayed on the display 11. The fourth mode is the main mode. - This is a mode for determining whether to return to ``-'', and when the failure is corrected by the administrator and the specified reset switch is pressed, the 4' mode returns to the original main flow and the reject counterfeit operation is canceled. . At this time, since the ROM 2 stores the address that caused the jump, the main flow is restarted by instructing the CPUI to specify the next address. However, unless the yield set switch is pressed, the flow will be the first
The subroutines from 'mode' to '4th' mode are repeated and the error code continues to be displayed on the display 11. Returning to the explanation of the main flow again, in the third mode, the CPU detects whether the coin switch 6 detects a foreign object and turns OFF, and if it is OFF, shifts to the fourth mode.

If it is ON, it is assumed that there is a blockage near the coin switch 6, and the process jumps to the subroutine shown in FIG. In the fourth mode, the CPU determines whether or not a coin has been inserted. Normally, in the sales standby state where no coin has been inserted, the CPU branches from the fourth mode and returns to the first mode, and the coin detection sensor 5 fails. Although the detection is repeated, the failure detection program starts at the fifth stage when the sales operation starts based on the input by the customer.
Executed from mode. At this time, whether or not a coin has been inserted is determined by checking whether the phototransistor of the coin sensing sensor 5 is turned FF as the coin passes and outputs a coin sensing signal. At this time, the time the phototransistor is turned OFF when the coin passes is much longer than the time the phototransistor is turned OFF for inspection, so the two can be easily distinguished. The fifth mode is a mode in which the machine waits for the coin to be detected by the coin switch 6 after it has been inserted, and if it cannot be confirmed that the coin switch 6 is turned on, it branches and repeats this mode again.

When ON is confirmed, the program proceeds to the sixth mode. When the inserted coin is confirmed by the coin switch 6, a coin insertion signal is output, and based on this inserted amount, a product that can be sold is determined, and the main body control section 13 performs an operation to enable the product selection switch. During this time, the CPU is in the 6th mode and the coin switch 6 is pressed.
Failure of the change subtraction sensor 8 is detected in the seventh mode, and failure of the product discharge carrier switch 12 is detected in the eighth mode.

That is, in the sixth mode, a check is made to see if the coin switch 6, which was turned OFF when the coin passed, is turned OFF again after the coin passes. The seventh mode and the eighth mode are operated by a change subtraction sensor 8 and a product discharge carrier switch 12, respectively.
The inspection will be carried out. The change subtraction sensor 8 and the product discharge carrier switch 12 are switches that control the operation of the change dispensing motor M and the product discharging motor M2 in one rotation, and discharge one product and dispense one change coin during one rotation. is accomplished. The change subtraction sensor 8 and the product discharge carrier switch 12 have almost the same mechanism, and the outline is shown in FIG. A metal piece 15 is attached to the disk 14.
The change subtraction sensor 8 or the proximity switch S, which is the product discharge carrier switch 12, is turned on when the metal pieces 15 are in position a and facing each other, but turns off when the motor M rotates in the direction of the arrow. do. Then, when the proximity switch S is turned off, the motor M is self-held and continues to be driven until the metal piece 15 faces the proximity switch S again and is turned on, that is, the motor M is guaranteed to drive one revolution. Therefore, in order for the motor M to make one rotation, the metal piece 15 must be in the layer a before rotation. For example, if the metal piece 15 is at the position b' indicated by the dotted line, one rotation cannot be guaranteed and the normal Change dispensing operation is not performed. Therefore, the change subtraction sensor 8 or the product discharge carrier switch 12 is set to ○N before the change payout operation or the product discharge operation.
This test must be carried out in the 7th mode and the 8th mode.
It is done in mode. In this way, in the 6th, 7th, and 8th modes, the coin switch 6, change subtraction sensor 8, and product discharge carrier switch 12 are each inspected before the product selection switch is pressed, but the CPU When a failure is detected in the mode, the program is transferred to the subroutine shown in FIG. 2d and the error code is displayed. As mentioned above, all sales will be discontinued at this time, but a means must be provided to return the inserted coins. Also, if the product does not reach the set price until multiple coins are inserted, modes 4 to 8 must be repeated each time a coin is inserted, but a flowchart for this is not provided. do. Sixth,
If no failure is detected in modes 7 and 8, the process advances to mode 9. If a product is selected by the customer, mode 10 also proceeds; if no item has been selected, branch to mode 6. The 6th, 7th, and 8th modes are repeated again. Therefore, it is determined whether a selection has been made or not based on the presence or absence of a selection signal generated by the main body control section 13 in response to the operation of the selection switch. FIG. 2B shows a program for fault detection after the selection signal is generated.

As for the operation of the main body 13, when a selection signal is generated, the product ejecting motor M2 corresponding to the selected product is energized and starts rotating, but at the same time, a failure of the pen end sensor 7 is detected in the Lull mode. be done. The pen end sensor 7 is installed near the sales outlet, and when it senses the arrival of the product ejected by the product ejection motor M2, it outputs a pen end signal to the main body control unit 13, indicating that the selling operation has been completed. Coin detection sensor 5 mentioned in Figure 3
For example, it consists of an LED and a phototransistor. Therefore, in the tenth mode, the LED of the pen-end sensor 7 is turned off, and in the eleventh mode, failure detection is performed by checking whether the phototransistor is off. If OFF cannot be confirmed, the process moves to the subroutine shown in FIG. 2d, where all sales are stopped, an error code is displayed, and the amount invested is returned. The twelfth mode is carried out by checking the output state of the product ejection carrier switch 12 to see if the product ejection motor M2 is being driven normally after being energized. As mentioned above, when the product ejecting motor M2 is driven, the product ejecting carrier switch 12 is turned FF, and if it is ON, the product ejecting motor M2 is deemed unrotatable and the program moves to a subroutine where part of the program is stopped. . The partial cancellation subroutine has a partial cancellation mode that discontinues sales of the column with the non-repeatable product discharge mode M2, and in this mode, the product sold out lamp is lit and another column can be selected again. control so that Therefore, the next address of the failure detection program specifies the sixth mode in which coin insertion has been completed, and the above-described operation is performed again. After confirming that the product ejection motor M2 is rotating normally, the CPU instructs the timer operation in the 13th mode.

This timer time is the first reference time from when the product ejection carrier switch 12 is turned from OFF to ON in a normal state. The mode shifts to the 15th mode. In the 15th mode, it is a mode to confirm whether the product ejection carrier switch 12 is turned on, and if it is not confirmed, the 14th mode is branched to the 14th and 15th modes.
It will be repeated. If it is confirmed that the product ejection carrier switch 12 is turned on within the first reference time, the mode shifts to the 16th mode, but if it is not confirmed that the product ejection carrier switch 12 is turned on within the first reference time, it means that the product ejection motor M2 has not made one rotation. Therefore, it is impossible to discharge the product, and the mode moves from the 14th mode to the subroutine to stop all sales and return the input amount.If the product discharge carrier switch 12 is confirmed to be ON within the first reference time, the selection is made. Although the product has been discharged from the column, it is now inspected in the 16th, 17th, and 18th modes to ensure that it has been delivered to the customer.

In the 16th mode, the product discharge carrier switch 12 is turned on.
After confirming this, the CPU is commanded to operate the timer again. This timer time is the second reference time from when the product is ejected from the column by the product ejection motor M2 until it reaches the sales outlet under normal conditions. The operation is the 13th and 1st public mentioned above.
The 13th mode, which is similar to the 15th mode and determines the presence or absence of a pen-end signal, is branched from the 17th mode.
Therefore, if the pen-end signal occurs within the second reference time, the mode will shift to the 19th mode in Figure 2c, but if it does not occur, it will be assumed that a product jam has occurred, and the mode will shift from the 17th mode to the subroutine to stop all sales. shall be. When the pen-end signal is output, the vending machine main body stops all operations related to the product ejection operation, but the main body control unit 13 subtracts the amount of the ejected product from the input amount to determine whether change is required or not. If necessary, a change payout command is output to the change payout motor M. In case the change dispensing operation is performed during that time, the failure of the change dispensing sensor 9 is the first.
920 mode. The change dispensing sensor 9 is disposed near the change dispensing outlet, and when the change discharged by the change dispensing motor M reaches the customer's hand, it outputs a change dispensing signal to the main body control unit 13, and It has the same configuration as the coin detection sensor described in detail. Therefore, in the 19th mode, the LED of the change dispensing sensor 9 is turned off and the
The test is performed by checking whether the phototransistor is turned off in the 0 mode. If the OFF of the phototransistor is not confirmed in the 20th mode, the 2nd
d) and all sales will be discontinued. At this time, the amount of change stored in the main body control section 13 must be returned by the administrator of the vending machine. In such cases, it is very effective to display the error code stored in the operand of the address that commands the 20th mode in the subroutine. That is, the manager can see the error code and understand the state of the malfunction, or if a customer claims that they received the product but not the change, they can confirm this. The 21st mode is the main body control unit 1
3, it is determined whether the change payout command is output,
If there is no output, it is assumed that all vending operations of the vending machine have ended, and the failure detection program is as shown in Figure 2A.
After branching out, the coin detection sensor 5, which is a failure detection program in the sales standby state, is inspected.

However, if the change dispensing command has been output, there is still change dispensing in the vending operation of the vending machine, and the failure detection program advances to the 22nd mode to perform a check related to the change dispensing operation. The 22nd mode is for detecting whether the change dispensing motor M2 is rotating to dispense a predetermined amount of change in response to the change dispensing command, and as mentioned above, the change subtraction signal is turned FF during rotation. , if not.
No.

Therefore, if it is ON, the change dispensing motor M2 cannot rotate and no change can be dispensed, and the routine jumps to the subroutine of FIG. 2d. At this time, in both the 2nd and 27th modes described later, when the subroutine jumps, the amount of change stored in the main body control section 13 is returned. After confirming that the change dispensing motor M2 is rotating normally, the CPU
I determines whether the change subtraction sensor 8 is turned ON within the third reference time after the timer operation is commanded.
In the 5th mode, inspection is performed in the same manner as in the 13th, 14th, and 15th modes described above. Therefore, the third reference time is the time it takes for the change subtraction sensor 8 to turn from OFF to ON in a normal state, and if ON cannot be confirmed within the third reference time, the mode changes from the 25th mode to the 24th mode. If this branch is not confirmed even after the reference time has elapsed, the subroutine jumps from the 24th mode. If the change subtraction sensor 8 turns ON within the third reference time, the change has been dispensed as instructed by the main body control unit 13, and it is checked in the 26th, 27th, and 28th modes whether the change has reached the customer. be done. Therefore, in the 26th mode, the CPU is instructed to operate a timer based on the fourth reference time from when change is dispensed by the change dispensing motor M in a normal state until it reaches the change outlet. Again, the operation is similar to the 13th, 14th, and 15th modes described above, and the change dispensing sensor 9 is activated within the fourth reference time.
If the change is detected and the change payout signal is not output, the 28th
The mode branches to the 27th mode, but if the signal is not output even after a reference time has elapsed, it is assumed that the payout change coins are jammed and the subroutine is branched from the 27th mode. Therefore, if generation of the change payout signal is confirmed within the fourth reference time, it is assumed that one change coin has been definitely paid out to the customer, and the mode returns to the 21st mode. The main body control unit 13 subtracts the payout change coin amount using the subtraction signal output when the change subtraction sensor 9 is turned on, but if there is still a remaining amount, it determines that further change payout operation is necessary and discards the change. The dispensing command is being output again, and the 21st
When the output of the change dispensing command is detected in the change dispensing mode, the failure detection program in the change dispensing operation is executed again, and in this way, the second
The programs from mode 1 to mode 28 are repeated. A device (microprocessor) that executes the failure detection method according to the flowcharts of FIGS. 2A, 28, 2C, and 2d will be described by citing a specific circuit example.

Figure 5 schematically shows the connections of CPU1, ROM2, PAM3, and 1/0 board 4.
All except /0 boat 4 exist in the CPUI. ROM
There is an incrementer/adder 18 and a program counter PCI9 that control the progress of the program stored in the ROM2.When the power is turned on, the program counter PCI9 is first cleared to "0" and the address is stored in the ROM2. The program is started by commanding "0". and an incrementer/adder 18 every time the program fetches an instruction or fetches data.
The program counter PCI9 controls the progress of the program by incrementing the program counter PCI9 by 1 and adding the address to the address to which to proceed when a branch or jump instruction is executed. Program contents include fetch cycles and execute cycles. In the case of fetch cycles that specify instructions, the instruction contents are stored in the instruction register 201.
The command is input and stored, and the control circuit 21 decodes and executes the contents of the command (various controls are performed). The control circuit 21 first controls the transmission of commands or data by controlling the opening and closing of gates from ■ to ■, which are indicated by numbers in the circle frames in FIG. , exclusive OR, etc., and also controls the opening/closing of the input/output terminals of the 1/○ boat 4. Therefore, in the case of a fetch cycle, gate ■ is opened and the instruction is transferred to instruction register 2.
In the case of an execute cycle, the data is controlled to be input to the ALU 22 through gate 2. For example, in the failure detection flowchart above, it was explained that the failure test for the pen-end sensor 7 is done by turning off the LED and then detecting whether the phototransistor is OFF. The operation will be further explained in detail based on FIG.

Although there are several other 1/04s equipped with vertical IT transmission lines, only one will be described here as a representative, and hereinafter this will be referred to as 1/OA. The LED is input/output terminal 0 of 1/OA, and the phototransistor is input/output terminal 1.
It is assumed that the two are connected to each other. The program for this inspection operation is represented by the following six steps. 1 Put the contents of each input/output terminal indicated by 1'OA into the accumulator ACC23.

2. Performs a logical AND operation between the contents of the accumulator ACC23 and the data of the spot it stored at the next address of the program, and stores the result in the ACC25.

3 Outputs the contents of ACC to 1/OA and turns off the LED.

4 Put the contents of 1'OA into ACC.

5 Performs a logical AND operation between the contents of ACC and the data stored at the next address, and stores the result in ACC.

6 Determine the test result based on the contents of the ACC.

First, in the above step 1, the control circuit 21 opens the gates ■ and ■ and inputs the contents of ``IT'' corresponding to each input/output terminal from 0 to 7 of 1/OA.
1.0'' is input to the ACC 23 via the ALU 22.
The content of this bit is the output state of 1/OA before the address of this instruction is specified, and although this is not particularly the case, the LED of the 1st and 2nd bits is lit and the phototransistor is turned on by this. ○N, so "1" is output for each. In the second step, the control circuit 21 opens the gates ■, ■, ■ and inputs "1, 1, 0, 1, 1, 0, 1, 0" and R stored in the ACC 23.
The ALU 22 calculates the AND with the &it data "0.1.1.1.1.1.1.1" stored at the next address of the OM2, and outputs the result to the ACC23.

This arithmetic operation is performed as shown in the following truth table 1, and the result of this arithmetic operation is stored in the ACC 23. In step 3 of Table 1, the control circuit 21 opens the gates ■ and ■ and transmits the contents of the ACC 23 to 1/OA via the ALU 22.
Output to.

Therefore, "ro" is output to the input/output terminal 0 of 1/OA, and the LED is turned off. In step 4, the control circuit 21' opens gates ■ and ■ and inputs the contents of 1/OA to the ACC 23. At this time, if the phototransistor turns FF based on the LED turning off, it is normal and the input/output terminal 1 of 1/OA outputs "0", and the contents are "0.0.0.1.1.0. 1.0" but due to malfunction ○
If it stays in N, "0・1・0ri1・1・0・1・o
” condition. In step 5, the control circuit 21
opens the gates ■, ■, ■ and reads the contents stored in the ACC23 and the data stored in the next address of the ROM2, "0, 1, 0, 0, 0, 0, 0, 0".
The logical product is calculated and outputted to the ACC 23.

Table 2 shows the ALU when the phototransistor is turned off.
Table 3 shows the truth table for the arithmetic operation in No. 22, and Table 3 shows the truth table when the phototransistor remains ON due to a failure. The command word of the program in the 6th step of Table 2 is the command and operand to determine the failure of the pen-end sensor 7 based on the calculation result in the 5th step stored in the ACC 3 and determine whether a jump is necessary or not. It consists of a subroutine jump address and an error code to be stored in RAM3. A failure is determined by detecting the output state of the 2nd bit of the ACC 23 using the status register 25. If it is "0", it is normal and the program proceeds to the next address, but "
1, a failure occurs and the jump operation shown in FIG. 3 is performed. That is, when the control circuit 21 decodes the command to determine whether a jump is necessary or unnecessary in the fetch cycle, A is executed.
The ND gate 24 is opened to prepare for a jump operation.
Then, the output status of ACC23 is stored in the status register 25.
When ``1'' is detected in any cell, a jump command is sent from the AND gate 24 to the incrementer/adder 18.
It receives an instruction to operate the addition function.
The status register 25 indicates whether "1" is output from any cell of the ACC 23 or all cells are "0".
This function detects whether a carry has occurred in the ACC23 as a result of the calculation and the detection of whether a carry has occurred in the ACC23.In the case of a failure, the status register is 25 generates an output to the AND gate 24, and the jump command is generated. When this jump command is generated, a predetermined value stored at the address of the program before the jump is added to the PCI 9 via the incrementer/adder 18, and the address to jump to is specified in the ROM 2. When a jump occurs, the control circuit 21 opens the gates (2) and (2) and stores the error code in the RAM 3 via the ALU 22. Pu decided to jump again. The program address is stored in the stack register 26 by the FCI 9, so when returning from the subroutine, the address to be returned to is specified based on this storage. RAM3
When displaying the error code stored in the ALU 2, the control circuit 21 opens the gates ■ and ■ and displays the error code stored in the predetermined address in the RAM 3.
It outputs to 1/0 port 4 via 2. Next, the timer operation program seen in the 13th, 14th, and 15th modes of the main flow proceeds in the following three steps.

A certain value corresponding to the timer time is output and stored in a certain register in the I RAM 3.

2 Input the contents of 1/0 boat A to the ACC 23 and check it with the status register 25.

3. Subtract "1" from the value stored in the register each time it is confirmed that the output of a predetermined bit of the contents of 1/0 port A has not changed.

The following two or three steps are repeated alternately, and if the output of the predetermined bit changes during this subtraction operation, it is determined that the time is within the timer time, and even if the value becomes "0" due to the subtraction, the output must not change. If so, it is determined that the time is longer than the timer time. For example, the timer operation when the product discharge carrier switch 12 connected to the input/output terminal 2 of the 1/0 boat A is turned from OFF to ON will be explained.

In the one-step fetch cycle, a timer operation command and a register to be used in the RAM 3 are designated, and in the execute cycle, a timer value corresponding to the timer time to be stored in this register is stored as data.

Therefore, the control circuit 21 opens the gates (1) and (2) and stores this data value outside the register via the ALU 22. In step 2, the control circuit 21 opens gates ① and ② in order to cause the ACC 23 to store the contents of the 1/0 boat A represented by MET.

At this time, the item "It" in the contents of "It" is "0" because the product discharge carrier switch 12 is OFF, and this is detected by the status register 25. In step 3, upon detection of this ``0'', the command for the subtraction operation of the register is stored in the fetch cycle, and the value rl to be subtracted as data is stored in the execute cycle.

First, the control circuit 21 opens the gates ■ and ■ to RA.
The timer value stored in the register in M3 is A
Transfer to ACC23 via LU22, then ALU2
By outputting a subtraction command to ACC23 and opening gates ■, ■, ■, "1" is obtained from the timer value transferred to ACC23.
” is subtracted. The result of this subtraction is then stored in the register again. After the subtraction of "1" is completed, input the contents of 1'○ boat A to ACC again, check the output state of the tsumugi it in the status register 25, and check "0".
”, then “1” is further subtracted from the previous subtraction value. That is, two or three steps are repeated alternately. Therefore, the time until the timer value stored in the register becomes 0 due to repeated subtraction is the timer time, and before the subtracted value of the register becomes 0, the product discharge carrier switch 12 is turned on. If the output "1" of the ground it is detected, it is normal. The present invention described in detail above first inspects whether each part constituting a vending machine is normal before operating when sequentially performing a vending operation based on the start of a vending operation period. It is something to do.

In the conventional system, a failure is detected only after the relevant part is operated, but with the present invention, a failure can be detected before operation, thereby making it possible to prevent malfunctions. If the pre-operation inspection shows that each part is normal, the operation of each part is allowed, but since failure diagnosis is performed in parallel during operation, even if an abnormality occurs during operation, the failure status can be easily notified. I can do that. Furthermore, when a failure is detected, rather than all vending machines being discontinued, depending on the nature of the failure, only some of the vending machines can be discontinued, thereby improving the operating rate. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram schematically showing the apparatus of the present invention, FIG. 2A, and FIG.
Figures B and 2c are the main flowchart, Figure 2d is the subroutine flowchart, Figure 3 is the configuration of the pen-end sensor or change payout sensor, Figure 4 is the configuration of the change subtraction sensor or product discharge carrier switch, and Figure 2c is the configuration of the change subtraction sensor or product discharge carrier switch. Figures 5 and 6 show CPU, RAM, ROM, 1/
An example of a specific circuit of 0 is shown.

Explanation of main drawing numbers i... Control device CPU, 2...
...Storage device ROM, 3...Discussion/write memory R capacity, 4...1/0 boat.

Figure 3 Figure 4 Figure 1 Figure 2A Figure 2B Figure 2C Figure 2D Figure 6 Figure 5

Claims (1)

[Claims] 1 A failure detection device that inspects abnormalities in each component of a vending machine, when the component before operation is generating the same signal as during operation, or by giving a signal to the component and responding to the signal. failure detection means for detecting an abnormality in the component when a response is not obtained; and control so that the failure detection means performs the failure detection operation before the activation of the components that are sequentially activated in the vending operation that starts when money is inserted. fault detection control means for detecting a fault, error code output means for generating an error code signal indicating an error code corresponding to a component in which a fault has been detected, and display control means for displaying an error code on a display based on the error code. 1. A failure detection device for a vending machine, comprising: a sales suspension control means for controlling the vending machine to a completely or partially sales suspended state depending on the component that has failed.