Elevator control panels, elevator control panel control systems, and replacement button control boards

Abstract

Limit the number of elevator control panel button control boards that can be replaced with alternative button control boards so that they do not exceed the allowable range. [Solution] The elevator control panel disclosed herein comprises multiple button control boards, each equipped with a communication circuit. The multiple button control boards include at least one alternate button control board. The communication circuits are connected in series by communication lines and are configured to transmit a command signal input from the elevator control unit to the most upstream communication circuit to the next communication circuit, and to output a response signal output from the most downstream communication circuit to the control unit. The alternate button control board comprises a delay circuit that delays the input command signal by a delay time. The control unit detects an abnormality in the communication status of the elevator control panel when the delay in the response signal relative to the command signal input to the most upstream communication circuit exceeds a reference time. The delay time is set so that the delay in the response signal exceeds the reference time if the number of alternate button control boards exceeds the allowable number.

Description

[Technical Field]

[0001] The present disclosure relates to elevator operator panels, elevator operator panel controls, and alternative button control board systems. [Background technology]

[0002] Some elevator control panels, such as car control panels, have multiple button control boards, each with a communication circuit. The elevator control panel, for example, periodically and continuously monitors the status of the elevator control panel. Specifically, for example, the elevator control panel periodically transmits a clock signal (CLK signal) and an SI (Serial In) signal to the elevator control panel, and monitors the communication status of the elevator control panel based on the response signal returned from the elevator control panel.

[0003] Patent Document 1 discloses a technology related to a transmission path switching device for data communication. The transmission path switching device of the technology of Patent Document 1 has a delay circuit that delays a received signal by the time required for switching operation, and is configured to be able to switch from the working system to the backup system without momentary interruption when a communication failure occurs in the working system. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 5-344104 Summary of the Invention [Problem to be solved by the invention]

[0005] The communication circuits on the button control boards installed in elevator control panels usually use specially designed custom integrated circuits (ICs), but production of custom ICs can be discontinued due to factors such as reduced production volume and cost reductions.

[0006] On the other hand, even after production of custom ICs has been discontinued, elevator control panels may still require button control boards, for example, to add more button control boards as the number of buttons to be connected increases, or to replace existing button control boards.

[0007] When custom ICs cannot be used for communication circuits due to discontinuation of production, general-purpose ICs are used for the communication circuits of replacement button control boards. Custom ICs have very little wasteful current consumption in the communication circuits, at extremely low values, such as a few mA. On the other hand, general-purpose ICs used in replacement button control boards often include many unnecessary functions. For this reason, the current consumption of communication circuits using general-purpose ICs is very wasteful, and can be approximately 20 times higher than that of circuits using custom ICs. For example, if multiple button control boards in a single elevator control panel are replaced with replacement button control boards due to a malfunction, the power consumption of the elevator control panel will increase significantly.

[0008] On the other hand, power supplies are usually set with a temperature derating according to the ambient temperature. For this reason, by using the power supply at a load factor of, for example, about 60 to 70% of the rated power, the effects of temperature derating can be reduced and the life of the power supply can be extended.

[0009] Therefore, even when replacing a button control board with a replacement, it is desirable to limit the number of replacements so that the load factor of the replaced elevator control panel falls within a predetermined range, for example, 60 to 70% of the rated power of the power supply device. If the load factor exceeds this range, it is desirable to take measures such as adding more power supplies. However, the limit on the number of button control board replacements may be overlooked when replacing a button control board. As a result, if an elevator control panel using a number of replacement button control boards exceeding the limit is used, a high load may be placed on the power supply device, potentially shortening its lifespan.

[0010] The present disclosure has been made in consideration of the above-mentioned problems, and provides an improved technology that can limit replacement of a button control board in an elevator operation panel if the replacement would cause power consumption to exceed an allowable range when the button control board is replaced with an alternative button control board. [Means for solving the problem]

[0011] One aspect of the technology disclosed herein is an elevator control panel. The elevator control panel includes multiple button control boards powered by a common power source, each of the multiple button control boards including a communication circuit, the communication circuits of the multiple button control boards connected in series with each other by communication lines, and at least one substitute button control board replacing a button control board, the serially connected communication circuits configured to sequentially transmit a command signal input from an elevator control unit to a most upstream communication circuit to the next communication circuit and output a response signal output from a most downstream communication circuit to the control unit, the substitute button control board including a delay circuit that delays the command signal input to the substitute button control board by a delay time, and the control unit detects an abnormality in the communication status of the elevator control panel when the delay in the response signal to the command signal input to the most upstream communication circuit exceeds a reference time, the delay time being set so that the delay in the response signal to the command signal input to the most upstream communication circuit exceeds the reference time when the number of installed substitute button control boards exceeds a permissible number.

[0012] Another aspect of the technology of the present disclosure is a control system for an elevator operating panel. The control system comprises a plurality of button control boards, a common power source that supplies power to the plurality of button control boards, and a control unit that detects abnormalities in the communication status of the plurality of button control boards, each of the plurality of button control boards having a communication circuit, the communication circuits of the plurality of button control boards being connected to each other in series by communication lines, the plurality of button control boards including at least one substitute button control board that has been replaced in place of a button control board, the serially connected communication circuits being configured to sequentially transmit a command signal input from the control unit to a most upstream communication circuit to the next communication circuit, and to output a response signal from the most downstream communication circuit to the control unit, the substitute button control board having a delay circuit that delays the command signal input to the substitute button control board by a delay time before outputting it, the control unit being configured to detect an abnormality in the communication status of the elevator operation panel if the delay in the response signal to the command signal input to the most upstream communication circuit exceeds a reference time, the delay time being a time that is set so that the delay in the response signal input to the most upstream communication circuit will exceed the reference time if the number of installed substitute button control boards exceeds an allowable number.

[0013] Another aspect of the technology disclosed herein is a replacement button control board used in place of a button control board in an elevator control panel having multiple button control boards. The replacement button control board includes a communication circuit, a delay circuit, and a button control circuit that controls buttons in response to commands from the communication circuit, the communication circuit being connected in series with the communication circuits of the multiple button control boards in the elevator control panel via communication lines, the serially connected communication circuits being configured to sequentially transmit a command signal input from the elevator control panel to a most upstream communication circuit to the next communication circuit and output a response signal output from the most downstream communication circuit to a control unit of the elevator, the delay circuit being configured to delay the input command signal by a delay time, and the control unit detecting an abnormality in the communication status of the elevator control panel when a delay in the response signal relative to the command signal input to the most upstream communication circuit exceeds a reference time, the delay time being a time set so that the delay in the response signal relative to the command signal input to the most upstream communication circuit exceeds the reference time when the number of replacement button control boards installed in the elevator control panel exceeds a permissible number. [Effects of the Invention]

[0014] When the number of button control boards on an elevator operation panel that are replaced with replacement button control boards exceeds the allowable number, a delay circuit provided in the replacement button control board delays the command signal so that it exceeds a reference time. This allows an abnormality in the communication state to be detected, thereby preventing the replacement of button control boards with replacement button control boards that exceed the allowable number. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a block diagram illustrating an overall configuration of a control system for an elevator operating panel according to an embodiment of the present disclosure. [Figure 2] FIG. 10 is a diagram illustrating an example of a communication waveform when a communication state is determined by an elevator control panel according to an embodiment of the present disclosure. [Figure 3] FIG. 10 is a diagram illustrating an example of a communication waveform when a communication state is determined by an elevator control panel according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same or corresponding parts are designated by the same reference numerals, and the description thereof will be simplified or omitted.

[0017] Embodiment 1 <Overall system configuration> 1 is a block diagram showing the overall configuration of an elevator control panel control system according to the present embodiment. The elevator control panel control system 100 shown in FIG.

[0018] The elevator control panel 1 includes a communication circuit 2, a control unit 3, and a DC (Direct Current) power supply 4. The communication circuit 2 transmits data output from the control unit 3 to the car operating panel 10, and also receives data from the car operating panel 10 and outputs it to the control unit 3. The DC power supply 4 is a common power supply that supplies power to the control unit 3, the communication circuit 2, and the car operating panel 10.

[0019] The car operating panel 10 is an elevator operating panel installed inside the elevator car. The car operating panel 10 has a plurality of destination buttons 11 and button control boards 12 and 13.

[0020] The destination buttons 11 are used by users to specify the destination floor of the elevator. In FIG. 1, five destination buttons 11 corresponding to floors 1 to 5 are shown. However, there is no limit to the number of destination buttons 11 installed on the car operating panel 10, and multiple destination buttons 11 are provided so as to correspond to the service floors at which the elevator can stop.

[0021] Each button control board 12, 13 is connected to each destination button 11 and controls each destination button 11. The button control board 12 is a board that has been mounted on the car operation panel 10 since the car operation panel 10 was first installed. On the other hand, the button control board 13 is a replacement button control board, and is a general-purpose board that is installed in place of the dedicated button control board 12, for example, during maintenance inspection or when an abnormality is detected.

[0022] Each button control board 12 is equipped with a communication circuit 14 and a button control circuit 15. Each replacement button control board 13 is equipped with a communication circuit 16, a button control circuit 17, and a delay circuit 18. A custom IC designed specifically for each car operating panel 10 is used for the communication circuit 14 of the dedicated button control board 12. On the other hand, a general-purpose IC is used for the communication circuit 16 of the replacement button control board 13, rather than a specially designed one.

[0023] The communication circuits 14, 16 are circuits for communicating with the elevator control panel 1. The multiple communication circuits 14, 16 are connected in series by communication lines 19. In the example of FIG. 1, the communication circuits 14, 16 corresponding to the destination buttons 11 of each floor are connected from the most upstream side to the most downstream side, in the order from the lower floors to the higher floors. However, there is no limitation on the order in which the communication circuits 14, 16 are connected, and for example, they may be connected in order so that the communication circuits 14, 16 corresponding to the higher floors are on the upstream side. The communication circuits 14, 16 are also connected in parallel by communication lines 20. The communication lines 20 transmit clock signals (hereinafter also referred to as "CLK signals"), which will be described later, to each button control board 12, 13.

[0024] In each of the button control boards 12 and 13, the button control circuits 15 and 17 control the destination buttons 11 based on signals from the communication circuits 14 and 16.

[0025] The delay circuit 18 included in the replacement button control board 13 has the function of delaying a clock signal (hereinafter also referred to as a "CLK signal") input from the upstream button control board 12 or 13 via the communication line 20 by a predetermined delay time T1 before outputting it. The delay circuit 18 may form a time constant using a resistor and a capacitor and delay the rising edge of the CLK signal based on this time constant. Alternatively, the delay circuit 18 may be a general-purpose delay IC that delays the input CLK signal by the delay time T1 before outputting it. The setting of the delay time T1 will be described in detail later.

[0026] Although not shown, the substitute button control board 13 includes a disabling means for disabling the delay circuit 18. The disabling means may be, for example, a pin into which a jumper plug can be inserted. By using the disabling means, such as inserting a jumper plug, the CLK signal is transmitted to the communication circuit 16 of the substitute button control board 13 and to the downstream button control board 12 or 13 without passing through the delay circuit 18.

[0027] <Limitation on the number of replacement button control boards> In the example of the car operating panel 10 in Figure 1, three button control boards have been replaced with replacement button control boards 13, but the number of button control boards that are replaced is not limited to this. However, a specially designed custom IC is used for the communication circuit 14 of the dedicated button control board 12, whereas a general-purpose IC is used for the communication circuit 16 of the replacement button control board 13. In the case of a specially designed custom IC, power consumption is very small, whereas in the case of a general-purpose IC, power consumption is significantly higher.

[0028] As the number of replacement button control boards 13 increases, the power consumption of the entire car operating panel 10 increases significantly, and the load on the DC power supply 4 that supplies power to the car operating panel 10 increases. If the load factor of the DC power supply 4 increases, there is a risk of problems such as a shortened lifespan of the DC power supply.

[0029] Therefore, in this embodiment, an allowable number of substitute button control boards 13 that can be replaced is set in the car operating panel 10 so that the power consumption of the car operating panel 10 does not exceed an allowable load (for example, within 60 to 70% of the rated power of the DC power supply 4). When the elevator control panel 1, which will be described later, determines the communication state of the car operating panel 10, if the number of substitute button control boards 13 installed in the car operating panel 10 exceeds the allowable number, the communication state is determined to be abnormal. This limits excessive replacement of button control boards 12 with substitute button control boards 13.

[0030] <Determining communication status> The elevator control panel 1 periodically determines the communication status of the car operating panel 10 to monitor the communication status of the car operating panel 10. Figures 2 and 3 are diagrams showing examples of communication waveforms when the elevator control panel 1 determines the communication status. Figure 2 shows an example in which all of the button control boards on the car operating panel 10 are dedicated button control boards 12, and Figure 3 shows an example in which two of the five button control boards on the car operating panel 10 of Figure 1 are dedicated button control boards 12 and three have been replaced with alternative button control boards 13.

[0031] First, an example of waveforms when determining the communication state when all button control boards on the car operating panel 10 are dedicated button control boards 12 will be described using Fig. 2. In Fig. 2, a CLK signal is a pulse signal that is repeatedly output from the elevator control panel 1 at a fixed period T0. The CLK signal output from the elevator control panel 1 is output to the car operating panel 10 via communication line 20, and is transmitted sequentially from the most upstream button control board 12 on the car operating panel 10 to the most downstream button control board 12.

[0032] Furthermore, an SO (Serial Out) signal SO_0, which is a command signal, is output from the elevator control panel 1 via the communication line 19 to the communication circuit 14 of the most upstream button control board 12. Each communication circuit 14 reads the SO signal input from the previous stage at the rising edge of the CLK signal, and outputs "Hi" if the signal is logical "1" (hereinafter referred to as "Hi"), or "Low" if the signal is logical "0" (hereinafter referred to as "Low").

[0033] In the example of Fig. 2, signal SO_0 output from elevator control panel 1 indicates "Hi" in the first cycle of the CLK signal. Signal SO_1 of the most upstream communication circuit 14 indicates "Hi" in response to input of signal SO_0 of "Hi" in the second cycle of the CLK signal. Similarly, signal SO_i of the ith communication circuit 14 indicates "Hi" in response to input of signal SO_i-1 of "Hi" from the preceding (i-1)th communication circuit 14 in the (i+1)th cycle of the CLK signal.

[0034] Therefore, when n button control boards 12 are connected, it is assumed that the SI (Serial In) signal, which is a response signal that is signal SO_n output from communication circuit 14 of the most downstream button control board 12, indicates "Hi" in the (n+1)th period of the CLK signal (see "SI assumption" in Figure 2). Note that the control unit 3 of the elevator control panel 1 stores information on the number n of connected button control boards 12 in advance by setting the switches in the elevator control panel 1.

[0035] That is, each time the signal passes through one communication circuit 14 of the button control board 12, a signal delayed by one CLK signal period from the SO signal input from the previous stage is output and input to the next communication circuit 14. Therefore, if n button control boards 12 are connected, the returning SI signal is assumed to be a signal delayed by n periods from the signal SO_0 output by the elevator control panel 1.

[0036] For example, in the example of Fig. 2, five dedicated button control boards 12 are connected. In this case, the SI signal returned to the elevator control panel 1 indicates "Hi" five periods after the CLK signal (i.e., the sixth period in Fig. 2) with a delay of five periods from the signal SO_0 input to the car operating panel 10.

[0037] The elevator control panel 1 determines that the communication status of the car operating panel 10 is normal if the delay time of the returning SI signal relative to the signal SO_0 is within the reference time T2, and detects an abnormality in the communication status of the car operating panel 10 if the delay time exceeds the reference time T2.

[0038] More specifically, in this embodiment, the elevator control panel 1 determines that the communication state is normal if the SI signal is "Hi" at the center of the CLK signal period T0 when the SI signal is assumed to be "Hi," and determines that the communication state is abnormal if the SI signal is "Low."

[0039] As described above, if the number of button control boards installed on the car operating panel 10 is n, the delay of the SI signal relative to the signal SO_0 is n periods. Since the communication status is determined at the center of the period T0 of the CLK signal, if the starting point is the time when the signal SO_0 of the elevator control panel 1 outputs "Hi," the communication status is determined at the determination timing shown in the following equation (1).

[0040]

number

[0041] It is sufficient that the SI signal indicates "Hi" at the determination timing. Therefore, it can be said that a delay with respect to the signal SO_0 is permissible up to the above determination timing, and the time indicated on the right side of the above equation (1) is the reference time T2.

[0042] Next, a case where some of the button control boards of the car operating panel 10 are replaced with substitute button control boards 13 will be described with reference to FIG.

[0043] 2, the CLK signal output from the elevator control panel 1 is transmitted sequentially from the most upstream (first) button control board 12 or 13. However, if the button control board is an alternative button control board 13, for example, as shown by CLK_1, CLK_3, and CLK_4 in FIG. 3, the input CLK signal is delayed by delay circuit 18 by delay time T1 and input to communication circuit 16 of that button control board 13, and also transmitted to the next button control board 12 or 13.

[0044] The signal SO_0 output from the elevator control panel 1 is input to the most upstream communication circuit 14 or 16. Each communication circuit 14 reads the SO signal from the previous stage at the rising edge of the CLK signal, and outputs "Hi" if the signal is logical "1" (hereinafter referred to as "Hi"), or "Low" if the signal is logical "0" (hereinafter referred to as "Low").

[0045] As described above, each time the signal passes through one dedicated button control board 12, the delay of the output SO signal relative to the input SO signal is one cycle of the CLK signal. Also, the CLK signal is delayed by the delay time T1 before being input to the alternative button control board 13. Therefore, each time the signal passes through one alternative button control board 13, the delay of the output SO signal relative to the SO signal input from the previous stage is one cycle of the CLK signal plus the delay time T1.

[0046] Therefore, when n button control boards 12, 13 are connected in series and m of them are replacement button control boards 13, the delay time of the SI signal relative to the signal SO_0 output by the elevator control panel 1 is the time shown in the following equation (2).

[0047]

number

[0048] As described above, power is supplied to the button control boards 12 and 13 from a common DC power supply 4. Here, the DC power supply 4 has a temperature derating set for the ambient temperature. Therefore, by using the DC power supply 4 at a load factor of approximately 60 to 70% of the rated power, the effects of derating are suppressed while the life of the DC power supply 4 is extended. For this reason, in this embodiment, even when replacing the button control board 13 with a substitute, the power consumption of the car operating panel 10 is prevented from exceeding the set allowable load.

[0049] Here, if the rated power of the DC power supply 4, i.e., the power allowable amount, is w0 (W) and the load rate allowable for one car operating panel 10 is a (%), the allowable load w1 due to the power consumption of the car operating panel 10 is given by the following equation (3).

[0050]

number

[0051] When the power consumption of the dedicated button control board 12 is p1, the power consumption of the replacement button control board 13 is p2, and the total number of button control boards 12, 13 installed on the car operation panel 10 is n, in order to prevent the power consumption of the car operation panel 10 from exceeding the allowable load w1, the allowable number m0 of replacement button control boards 13 that can be replaced must satisfy the condition of the following equation (4).

[0052]

number

[0053] In this embodiment, if the number of replacement button control boards 13 installed exceeds the allowable number m0, the communication status of the car operating panel 10 is judged to be abnormal, thereby restricting the installation of replacement button control boards 13 from exceeding the allowable number m0.

[0054] <Setting the delay time using a delay circuit> That is, when the number of installed replacement button control boards 13 exceeds the allowable number m0, the length of delay time T1 applied by delay circuit 18 is adjusted so that the delay of the SI signal relative to signal SO_0 is greater than reference time T2. Specifically, the delay time of the SI signal relative to signal SO_0 is expressed by the above formula (2). The value of formula (2) should be smaller than reference time T2 when the number of installed replacement button control boards 13 is the allowable number m0, and should be greater than reference time T2 when the number reaches (m0+1). Therefore, delay time T1 is adjusted to satisfy the condition of the following formula (5).

[0055]

number

[0056] Furthermore, in this embodiment, the reference time T2 is the judgment timing shown in equation (1), so when equation (1) is substituted into equation (4), the delay time T1 is adjusted to satisfy the following equation (6).

[0057]

number

[0058] By setting the delay time T1 as described above, if the allowable number m0 is exceeded and the button control board 13 is replaced with an alternative one, the SI signal will not indicate "Hi" at the determination timing, and the elevator control panel 1 will determine that the communication status is abnormal. As a result, replacement with an alternative button control board 13 is limited, preventing the DC power supply 4 from being used beyond the maximum load rate that takes temperature derating into consideration, and suppressing a decrease in the lifespan of the DC power supply 4.

[0059] For example, in the example of Fig. 3, the allowable number m0 of replacement button control boards 13 that can be installed is 2, and the delay time T1 caused by the delay circuit 18 is greater than one-sixth and less than one-fourth of the period T0 of the CLK signal. On the other hand, in the example of Fig. 3, the first, third, and fourth button control boards have been replaced with replacement button control boards 13.

[0060] The delay of the assumed SI signal (see "SI assumption" in FIG. 3) relative to the signal SO_0 is five periods of the CLK signal, and the determination timing is the center timing of the sixth period.

[0061] As shown in FIG. 3, the CLK signal input to the communication circuit 16 in the first, third, and fourth button control boards 13 is delayed by a delay time T1 relative to the CLK signal input from the upper level. Therefore, the SO signal output from the communication circuit 16 of the first, third, and fourth button control boards 13 is delayed by one cycle T0 plus the delay time T1 relative to the SO signal input from the upper level. Therefore, the actual SI signal output from the most downstream communication circuit is delayed by three times the delay time T1 relative to the expected SI signal. Three times the delay time T1 is longer than half the cycle T0 of the CLK signal. Therefore, the SI signal indicates "Low" at the determination timing, and the communication state is determined to be abnormal.

[0062] If the elevator control panel 1 determines that the communication state is abnormal because the number of installed alternative button control boards 13 exceeds the allowable number m0, measures such as adding more power sources can be taken to extend the life of the DC power supply 4. In this case, the disabling means of the alternative button control board 13 is activated, for example, by inserting a jumper plug, and the delay circuit 18 is disabled. This allows the car operating panel 10 on which the alternative button control board 13 is installed to be used as is.

[0063] As described above, according to this embodiment, if the replacement button control board 13 is installed in excess of the allowable number m0, it is determined that there is an abnormality in the communication state, thereby preventing the replacement car operating panel 10 from being used in a state in which the power supply allowance w0 is exceeded.

[0064] The technology for limiting the number of replacements of substitute button control boards 13 in this embodiment can be applied not only to car operating panel 10 but also to other elevator operating panels such as hall operating panels. Also, in the above description, in car operating panel 10, one button control board 12, 13 is provided for each destination button 11, but a configuration in which one button control board is provided for multiple destination buttons 11 is also possible. Also, button control boards 12, 13 are not limited to those that control destination buttons 11, but may be connected to and control, for example, up / down buttons and door open / close buttons.

[0065] In this embodiment, the SO signal is transmitted to the next stage every cycle of the CLK signal. However, the update timing of the SO signal may be, for example, every rising or falling edge of the CLK signal, or every multiple cycles (N cycles) of the CLK signal. Even in this case, the delay time T1 by the delay circuit 18 can be set by replacing the value of the cycle T0 in the above equations (1), (2), (5), and (6) with 1 / 2T0 or N×T0 in accordance with the cycle of the update timing.

[0066] Furthermore, the determination of the communication status is not limited to a configuration in which an SO signal is transmitted in synchronization with a CLK signal and the communication status is determined based on the returned SI signal. For example, elevator control panel 1 may transmit data asynchronously with the CLK signal, and determine that a communication abnormality has occurred if the delay time of a response signal to the transmitted data exceeds a reference time T2. In this case, the delay circuit of the substitute button control board is configured to delay the output data by a delay time T1 relative to the input data so as to satisfy the condition shown in equation (4).

[0067] The above describes in detail preferred embodiments, but the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims. [Explanation of symbols]

[0068] 1 elevator control panel, 2 communication circuit, 3 control unit, 4 DC power supply, 10 car operation panel, 11 destination button, 12 button control board, 13 replacement button control board, 14 communication circuit, 15 button control circuit, 16 communication circuit, 17 button control circuit, 18 delay circuit, 19 communication line, 20 communication line, 100 control system

Claims

1. a plurality of button control boards powered by a common power source; Each of the plurality of button control boards includes a communication circuit; the communication circuits of the plurality of button control boards are connected in series with each other by communication lines; the plurality of button control boards include at least one substitute button control board that is substituted in place of the button control board; The serially connected communication circuits are configured to sequentially transmit a command signal input from an elevator control unit to the most upstream communication circuit to the next communication circuit, and to output a response signal output from the most downstream communication circuit to the control unit, the substitute button control board includes a delay circuit that delays the command signal input to the substitute button control board by a delay time; the control unit detects an abnormality in the communication state of the elevator operation panel when a delay of the response signal with respect to the command signal input to the most upstream communication circuit exceeds a reference time, the delay time is a time set so that, when the number of installed substitute button control boards exceeds an allowable number, a delay in the response signal in response to the command signal input to the most upstream communication circuit exceeds the reference time. Elevator control panel.

2. Each of the replacement button control boards includes a disabling means for disabling the delay circuit. The elevator control panel according to claim 1.

3. a plurality of button control boards; a common power source that supplies power to the plurality of button control boards; a control unit that detects an abnormality in the communication state of the plurality of button control boards; Equipped with Each of the plurality of button control boards includes a communication circuit; the communication circuits of the plurality of button control boards are connected in series with each other by communication lines; the plurality of button control boards include at least one substitute button control board that is substituted in place of the button control board; the serially connected communication circuits are configured to sequentially transmit a command signal input from the control unit to the most upstream communication circuit to the next communication circuit, and to output a response signal from the most downstream communication circuit to the control unit; the substitute button control board includes a delay circuit that delays the command signal input to the substitute button control board by a delay time and outputs the delayed command signal; the control unit is configured to detect an abnormality in a communication state of the elevator operation panel when a delay of the response signal with respect to the command signal input to the most upstream communication circuit exceeds a reference time, the delay time is a time set so that, when the number of installed substitute button control boards exceeds an allowable number, a delay in the response signal in response to the command signal input to the most upstream communication circuit exceeds the reference time. Elevator control panel control system.

4. Each of the replacement button control boards includes a disabling means for disabling the delay circuit. The elevator control system according to claim 3 .

5. In an elevator operation panel having a plurality of button control boards, a substitute button control board is used in place of the button control board, A communication circuit; A delay circuit; a button control circuit that controls the buttons in response to commands from the communication circuit; Equipped with the communication circuit is connected in series with the communication circuits of the plurality of button control boards in the elevator operation panel by communication lines; The serially connected communication circuits are configured to sequentially transmit a command signal input from the elevator control panel to the most upstream communication circuit to the next communication circuit, and to output a response signal output from the most downstream communication circuit to the elevator control unit, the delay circuit is configured to delay the input command signal by a delay time, the control unit detects an abnormality in the communication state of the elevator operation panel when a delay of the response signal with respect to the command signal input to the most upstream communication circuit exceeds a reference time, the delay time is a time set so that a delay of the response signal in response to the command signal input to the most upstream communication circuit exceeds the reference time when the number of the alternative button control boards installed on the elevator operation panel exceeds an allowable number. Replacement button control board.

6. Each of the replacement button control boards includes a disabling means for disabling the delay circuit.

6. The alternative button control board of claim 5.

Images