JPS6153992B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an elevator maintenance device, and more particularly to a maintenance device suitable for an elevator that uses a microcomputer (abbreviated as “microcomputer”) in the elevator signal control section. Due to recent advances in semiconductor integration technology, the degree of integration has increased.
Microcontrollers have progressed to MSI and LSI, and have recently been incorporated into various industrial products because they have the advantages of small size, low price, high functionality, and low power consumption. Microcontroller is MPU (Micro Processor Unit)
ROM (Read Only Memory), RAM (Random
Access Memory), I/O (Input/Output)
It consists of ports, etc., but as the price of these products has decreased, we have integrated them into one chip.
So-called one-chip MPUs have also been commercialized. Such a microcomputer is also suitable for elevator control. In other words, conventional elevator control devices are mainly composed of relays, and the number of relays is in the hundreds.As a result, the control device becomes larger, the relay sequence becomes more complex, and it reaches its functional limits. , it has problems such as poor scalability. These problems can be solved by applying a microcomputer to the elevator control device, and reliability can also be improved if only the signal control section using the microcomputer is used. However, various mechanical switches are used in the elevator car, in the hoistway, in the landing area, in the machine room, etc., and many electrical devices such as drive devices, protective equipment, etc. are scattered throughout the elevator. Therefore, even if the signal control unit of the elevator control device is a microcomputer, there is a possibility that the entire system will fail. Therefore, it is necessary to monitor the control status in the same way as in elevators configured with conventional relays. In addition, it is necessary to conduct test operations for adjustment, inspection, maintenance, etc. at the time of elevator delivery and thereafter as necessary. In conventional relay circuits, elevators can be monitored by checking whether each relay is on or off. On the other hand, when configured with a microcontroller, it is impossible to check how the sequence is operating at all, but this can be overcome by displaying the control data of the microcontroller on the CRT display. Conceivable. In addition, in the case of a conventional relay circuit, during a test run, maintenance personnel or the like manually turn on the relay or use a clip to turn on the relay continuously. However, in elevators that use microcomputers, there are only a few locations that can be tested using conventional methods, making it impossible to perform sufficient adjustment, inspection, or maintenance. For this reason, some kind of testing device is desired. Furthermore, the conventional testing methods described above have the following drawbacks, and it would be extremely beneficial if these points could be improved at the same time. 1 Ensuring safety As mentioned above, conventionally, test runs are performed by using clips to continuously close relays or to prevent relays from closing, so it is sometimes possible to forget to put them back at the end of a test run. If there is, an abnormal state occurs in the normal service state. 2. Improving test accuracy Conventionally, test operations can only be performed within the range of manually opening and closing relays, making it difficult to test the entire control system. 3. Simplification of test operation Conventional test operation requires skilled maintenance personnel and requires a long time for test operation. This is even more noticeable in group control elevators in which a plurality of elevators are arranged in parallel and managed in groups. The present invention has been made in view of the above, and includes:
The purpose is to provide an elevator maintenance device that can easily test run an elevator that uses a microcomputer as a signal control section. A feature of the present invention is that in an elevator that uses a microcomputer to control operation in the signal control section of the elevator,
A test information signal consisting of a test code and test data is input from the input device, and the maintenance means built into the microcomputer performs a test run of the elevator using the free time of the microcomputer, and the output is displayed or printed on the output device. By doing so, it is possible to efficiently and easily perform various tests without interfering with normal elevator control. The present invention will be explained in detail below using the embodiments shown in FIGS. 1 to 19. FIG. 1 is a block diagram for explaining one embodiment of the overall configuration of the device of the present invention, and shows a case where elevators of No. 1 and No. 2 are group-managed (the following examples also apply). The same is true.) In Figure 1, elevator control system 1 of unit 1
is a control circuit 7 with some relays configuring the sequence for safety and elevator driving etc.
It is comprised of a button 8 for car calls, etc., a switch 9 for operation selection, etc., limit switches 10 for confirming the safety of the elevator, and an indicator 11 such as a car call response lamp. The signal control device 2 of the elevator of No. 1 has an input/output interface circuit 12 with the elevator control system 1, a microcomputer 13 that performs signal control, and an interrupt to the microcomputer 14 in order to process the elevator sequence program preferentially at regular intervals. It is comprised of an interrupt pulse generation circuit 14 that performs the following operations, and an interface circuit 15 that transmits and receives data to and from the group management control device 3. Reference numeral 4 denotes a maintenance device, which includes a fluorescent display tube LED (Light
Output (display) device 16 such as
an output (display) control circuit 17 that outputs output (display) signals to the computer, an input/output interface circuit 19 between a signal input device 18 such as a keyboard and the microcomputer 13, and a memory 20 (ROM and workstation that stores programs for the maintenance device 4). for use
RAM). 5 is the elevator control system of the second car, and 6 is the signal control device of the second car elevator, which have the same configuration as that of the first car. In addition, the group management control device 3 does not have the input/output interface circuit 12 of the signal control device 2 in terms of hardware, but instead has an additional interface circuit for the signal control devices 2, 6, etc. The other components are the same as the signal control device 2. Note that the elevator control systems 1 and 5 and the elevator signal control devices 2 and 6 of the elevator control device, which constitute the entire elevator control device, are not limited to such a configuration, and for example, the group management control device 3 may be omitted, Needless to say, a configuration may be adopted in which the elevator signal control devices 2 and 6 perform the control processing. Next, a schematic operation according to the present invention will be explained using FIG. 1. Elevator signal control device 2
The input/output interface circuit 12 receives control input signals from buttons 8 consisting of the hall call button at the landing, the destination floor button in the car (abbreviated as the lower car call button), the door open/close button on the driving panel in the car, etc. After that, microcomputer 1
Enter 3. The microcomputer 13 starts a program for controlling elevator signals using pulses from the interrupt pulse generation circuit 14 at a cycle earlier than the time required for practical use, controls the above-mentioned calls to be serviced efficiently and safely, and controls input/output. The relays, devices, and lamps of the elevator control system 1 are driven and controlled via the interface 12. It is sufficient if the elevator control device and the entire elevator drive mechanism are always normal, and the elevator maintenance device 4 according to the invention is no longer necessary. However, as mentioned above, elevators may experience various types of trouble several times a year. Therefore, periodic inspections such as service function checks and group control operation checks by maintenance personnel are required, and highly efficient and highly reliable maintenance equipment is also required. Also,
Because elevators are used in many ways, maintenance personnel are on standby throughout the country. Therefore, a considerable number of maintenance devices are required. Furthermore, maintenance personnel must take such maintenance equipment to the building where the elevator to be maintained is installed. Therefore, the maintenance device needs to be inexpensive and lightweight. By the way, in the present invention, the maintenance device 4 is
As shown in FIG. 1, an output device 16, an input device 1
8, a peripheral interface adapter (hereinafter abbreviated as PIA) that interfaces these with the microcomputer 13 is connected to the output control circuit 17,
If it is used as the input/output interface circuit 19, all that is left is to store the program for the maintenance device 4.
Since the main components are ROM and memory 20 such as RAM used for work, etc., it can be stored on a single S-size printed board. In addition, as for the input device 18 and the output device 16, as shown in FIGS. 2 and 3, respectively, a keyboard (numbers and alphanumeric characters are sufficient),
It can be easily constructed using a fluorescent display tube or the like. In addition, the second
The interface between the microcomputer 13 in FIG. 3 and FIG. 1 can be realized by using one PIA. FIG. 2 is a circuit diagram showing one embodiment of the input device 18, which is a key input circuit. That is, 21 is a binary-hexadecimal conversion decoder, 22 is a key contact circuit,
23 is an 8-line to 3-line priority encoder, and the key contact circuit 22 is designed so that the key contact becomes conductive when the key is pressed in, and there are S keys on the X line and 8 keys on the Y line, in total.
The keyboard consists of 8S keys. Before key-in, the Y line is all "1" because it is pulled up to +5V by the resistors _R0 to _R7 . On the other hand, the binary-hexadecimal conversion decoder 21 scans the meline with a "0" signal at a constant cycle. However, since this scan timing is also used for the fluorescent display tube shown in FIG. 3, which will be described later, the X lines of the binary-hexadecimal conversion decoder 21 are set to 0 to U. Since the Y line including the pressed contact changes from "1" to "0", the key input information is encoded by the 8-line-3-line priority encoder 23 and becomes input information. FIG. 3 is a circuit diagram showing an embodiment of the output device 16, in which 24 is a binary-hexadecimal conversion decoder shared with that in FIG. 2, 25 is a (U+1) digit fluorescent display tube,
Transistors Q ₁ to _{Q 8} corresponding to the segment information output from the A port of PIA are turned on and off,
At the same time, use the above scan signal to determine which digit from 0 to U the segment information is (U+
1) A fluorescent display is displayed on the digit fluorescent display tube 25. The case where the keyboard and the fluorescent display tube are used as the input device 18 and the output device 16, respectively, has been briefly explained above.
Alternatively, a printer or a CRT may be used as the output device 16 (however, the interface may be an ACIA communication interface adapter or the like). As shown in Fig. 1, the maintenance device 4 is not only used for the unit elevator signal control devices 2 and 6, but also connected to the group management control device 3 to perform comprehensive maintenance. The connection can be made easily. For example, removable connection devices such as sockets and connectors are provided between the car signal control devices 2 and 6, the group management control device 3, and the maintenance device 4 shown in FIG. 1 for bus connection. Alternatively, maintenance device 4
If the system is simply composed of a printed board and input/output devices 18, 16, prepare printed board connectors in advance for the unit signal control devices 2, 6 and the group management control device 3, so that they can be connected and disconnected. Make it. At that time, make the power line at the connector part of the printed board several mm longer than other data, address, and control lines so that it can be connected and disconnected while it is live, so that it will not affect the microcontroller 13. do. Next, an overview of the entire software of Unit 1, including the functions of maintenance device 4, is shown in Figures 4 to 19 and 1.
This will be explained using a table. FIG. 4 is a flowchart showing an example of a program that starts processing as soon as the power is turned on.
0' clears all RAM, step 30 sets the stack pointer, and step 40 clears the input/output interface circuit (12, 15, 1 in Figure 1).
IXO, LSI such as PIA and ACIA used in 7, 19)
Set the initial values of the internal registers, and proceed to step 5.
0 is used to set initial values for other tables, etc. After completing these processes, proceed to step 60.
The interrupt mask is canceled at step 70, and the interrupt becomes available at step 70. The above is an overview of the main initial processing at system start-up. FIG. 5 is a flowchart showing one embodiment of an IRQ (Interrupt Request) interrupt processing routine. Generally, elevator car signal control is performed by monitoring relay signals and the like, so it is considered good to perform it at regular intervals. Therefore, it is necessary to provide an interval timer for this purpose, and this will be described as an example of a case where there are several other interrupts that need to be processed at a particularly high speed. First, in step 80, the cause is determined as to whether or not it is an interval timer interrupt.
If it is not an interval timer interrupt, other interrupt processing and cancellation of this interrupt are performed in step 160. When an interval timer interrupt is used, elevator signal control is used for processing that requires a high processing response after signal detection, such as reopening a door when a passenger is caught in the door. There is no problem if these signals can be processed by interrupts, but if the number of interrupt points increases unavoidably and it is necessary to scan at a constant cycle, in step 90, the constant cycle (here, the interval timer interrupt cycle) is ) is made smaller and scanning is performed at this cycle. Thereafter, in step 100, the interrupt mask is released in order to accept other interrupts. Then step 11
Processing is performed by appropriately dividing the interval timer between 0 and 150. This also includes signal control (hereinafter referred to as sequence processing). After completing all necessary processing, execute the RTI (Refurn Interrupt) instruction, return to the processing before the interval interrupt, and continue processing. FIG. 6 is a time chart showing how these processes are executed. The test contents input from the input device 18 of the maintenance device 4 (the maintenance functions of this device are processed by software) are composed of multiple test codes that instruct the maintenance functions and test data that supplements the specific contents (actually, The process up to displaying the test result on the output device 16 according to the test content is called maintenance process, and the timing for starting this process is clarified. In addition, for ease of explanation,
It is assumed that there are no interrupts other than the interval timer, and in addition to the high-speed processing, sequence processing, and maintenance processing described using FIG. 5, there is semi-high-speed processing that requires slightly higher speed.
First, high-speed processing is activated for each interval timer interrupt, and after this processing is completed, semi-high-speed processing that performs the necessary frequency division is activated. Semi-high speed processing is activated once for every two interval interrupts, sequence processing and maintenance processing are activated once for three interval interruptions, and maintenance processing is activated after the sequence processing. Therefore, after high-speed processing,
Semi-high-speed processing and sequence processing are activated, and if semi-high-speed processing and sequence processing overlap, the one checked first in step 120 in FIG. 5 is activated. In Figure 6,
Semi-high-speed processing is started, and then sequence processing is started. Maintenance processing is started after sequence processing. Here, there are two ways to set the start timing of the maintenance process. One is activated at regular intervals as mentioned above, and the other is activated by the microcontroller 13.
It always starts when the MPU is free. In the case of FIG. 6, if there is no processing after the maintenance processing, it can be said that the result is the same. However, in the case of this maintenance process, it is necessary to scan whether the key of the input device 18 is turned on or not, and since the fluorescent display tube is refreshed using software, it should be activated at a constant cycle. It's better. At least, the routine for displaying the fluorescent light must be set at a constant cycle. If such a method is not used, the fluorescent display tube should be refreshed at a fixed cycle using hardware. Next, maintenance processing will be explained. In FIG. 7, in step 170, input processing is performed on the input device 18 (in the case of a keyboard), and in step 180, a search is made to see if a key input has been made. FIG. 8 is a flowchart showing an example of a program showing details of keyboard input processing.
At step 20, S clear is performed, and then at step 330, the Xo to Xs lines shown in FIG.
In steps 360 to 360, the presence or absence of an input key is searched. Returning to FIG. 7, if there is a key input at step 180, a search is made at step 190 to see if there are two key inputs at the same time, and if there are two key inputs, the process advances to step 260. The reason for this is that the case without a shift key is used, which is easy to process in terms of software and has a high response.
If it is found that one key is normally pressed, steps 200 to 260 except step 220 are executed to remove the switch chattering by software. First, in step 200, STATUS is determined to be "0", that is, if it is the first key input detected, this key input is saved in step 240, and in step 250, the key input is evacuated.
Set STATUS to “1”. Since the maintenance process ends at this point, the user naturally continues to press the key of the maintenance device 4, and when the maintenance process starts in the next cycle, the same key will be detected. At this time, STATUS is "1", so in step 210 it is determined whether the input key is the same as the previous input key, and if it is the same, it is a normal key input.
In other words, it can be regarded as a key input that has not been affected by chatter or the like, and the reception process for this key is performed in step 220. By the way, when it is detected in step 190 that two keys are pressed at the same time, the explanation is given using the case where no shift key is provided.
This means that the user made a key operation error. Therefore, in step 260, set STATS to "0",
All previous key registrations are invalidated, and error processing is performed in step 270. The flowchart showing an example of this error handling program is shown in the first example.
It is shown in Figure 1. That is, a symbol (character) indicating a key input error is displayed in step 600, an alarm sound indicating a key input error is generated in step 610 as necessary, and a reset process is performed in step 620. A flowchart showing an embodiment of this reset processing program is shown in No. 10. By the way, in the command reception process at step 220, some method, such as display, is performed, so
The user knows that the key input has been accepted and releases the key. Therefore, as a result of the keyboard input process (FIG. 8) in step 170 of the next cycle, it is detected in step 180 that there is no keyboard input, and at that time, all test codes and test data have already been input. If so, the process should have been registered as described later, so it is determined in step 280 that the process has been registered.
At step 290, registration and display processing is performed. A flowchart showing an example of a program for this registration display processing is shown in FIG. Note that the registration display process displays the content requested by the maintenance personnel on the output device 16 using the registered test code and test data. This process continues until the next test request. For example, if this is a readout display of the contents of a certain memory (details will be described later), it will be refreshed at regular intervals, so you can dynamically see how the contents of the memory (relay signals may also be used) change from moment to moment according to the state of the elevator. can be monitored. Next, the command reception process in step 220 of FIG. 7 will be explained in detail using FIG. 9. FIG. 9 is a flowchart showing an example of a program for command reception processing. What kinds of test codes and test data are there, that is, what are the functions of the maintenance device 4 according to the present invention? will be explained in conjunction with the command reception process shown in FIG. 9, the test code shown in Table 1, and the key operations for inputting test data. First, in step 370, the input key is set to the R key (R
means Reset. ), and if it is the R key, a reset process is performed in step 470. That is, as shown in 8 of Table 1,
All test processing of the maintenance device 4 currently being executed is terminated, and a new processing is placed in a key input waiting state.

[Table] The details of this process are shown in FIG. Next, in step 380, it is determined whether the NO key has been pressed. This is because all input is done in hexadecimal, so the 0-9 and A-F keys are the targets. This number key (NO key) contains the address (n ₁ n ₂ n ₃ n ₄ ), bit NO (l), and rewrite data (m ₁ m ₂ ) (hexadecimal and binary) as the test data shown in Table 1. If the NO key is pressed, number processing is performed in step 480. A flow chart of this number processing 480 program is shown in FIG. first,
The key number is checked in step 630, and if the key input is for address n ₁ n ₂ n ₃ n ₄ of Table 1, the input key is changed to address n ₀ in step 700.
~n ₃ and display the key at a predetermined position on the fluorescent display tube. Further, the modified data (Upper byte) m1 of 3 in Table ₁ is processed in the same way. As for _m2 , input of test code and test data for the function 3 in Table 1 is now complete, so this process (referred to as batch processing, details will be described later) is performed at step 68.
Register with 0. Regarding input of bit 1 in 4 in Table 1, the input key is registered as bit processing 1 in step 660, and bit processing registration is performed to display the contents of bit 1. The above is an overview of number processing. Next, in step 390, it is checked whether the M key, which is command 1 in Table 1, has been pressed. If the M key has been pressed, the dump (16
(proceeding) process. This is because this test displays the contents of the address specified by the test data in hexadecimal, so it is processed by the program shown in FIG. That is, in step 725, the contents of addresses n ₁ , n ₂ , n ₃ , n ₄ are displayed in hexadecimal, and in step 730, dump (hexadecimal) processing is registered. If the T key, which is the command 2 in Table 1, is pressed (step 400), dump (binary) processing is similarly registered in step 500. If the P key, which is the command 3 in FIG. 1, is pressed in step 410, patch processing is performed in step 510. Details of this program are shown in FIG. That is, in step 790, the content of the address input as test data is displayed when the P test code is input, and as described above, when data m ₁ and m ₂ are input, the data already displayed is converted to this data and displayed. . The above is an overview of patch processing. Similarly, in step 420, 4 of Table 1
When the command Q key is pressed,
Bit processing is performed in step 520. Details of this program are shown in FIG. That is,
At step 830, the contents of the specified bit number of the specified address are displayed in binary. In this case, it is possible to display as many digits as the fluorescent display tube, which is a suitable function for monitoring relay signals.
It is possible to dynamically monitor the status of multiple relay signals that you want to monitor. Note that, unlike other functions, this requires the registration of the address and bit number to be displayed for the number of digits to be displayed. About the increment process when the L key, which is command 5 in Table 1, is pressed (Figure 17) and the decrement process when the S key, which is command 6 in Table 1, is pressed (Figure 18) are simply the commands 1 to 4 in Table 1, M, T, P,
Since the only thing to do is to increment registered addresses n ₁ , n ₂ , n ₃ , n ₄ by +1 or -1 when a key such as Q is pressed, a detailed explanation will be omitted. Next, in step 450, if the H key, which is command 7 in Table 1, is pressed, hold processing registration is performed in step 460. The hold process is a process for holding the function currently being executed after the H key is operated, and is used when it is desired to continue displaying the dynamic display for a certain period of time. Below, including this hold process, the seventh
The registration display process of step 290 in the figure will be explained using FIG. 19. FIG. 19 is a flowchart showing one embodiment of a program for registration display processing. When actually displaying using the fluorescent display tube 25 shown in FIG.
As mentioned above, it is very easy from a software perspective to write to the A port of the PIA and specify the digit using the LOWER byte of the B port. First, in step 935, if the registration process is a hold process, step 940 is performed.
Display and output the same content (segment code) as the current one. If the registration process is batch processing in step 945, it is checked in step 950 whether the registered address is a protected address (actually, the protected range has been written in the ROM of the memory 20 in FIG. 1). However, if no protection is applied, step 960
The determination as to whether or not it is bit processing is performed together with processing other than hold processing and patch processing. This is because bit processing differs from other processing in that step 10
This is because it is necessary to display over a plurality of addresses as shown in 10 to 1040. later,
In step 970, it is commonly determined whether the contents of the registered address are to be displayed in hexadecimal or binary, and in step 980 and 990, binary or hexadecimal is displayed depending on the case. As described above in detail based on the embodiments, according to the present invention, an elevator in which the microcomputer 13 is used in the signal control devices 2 and 6 can be test-operated very easily. Therefore, high precision testing can be performed in a short period of time without the need for skilled personnel, and elevator adjustment, inspection and maintenance work are significantly facilitated. In addition, the maintenance device 4
Because it has a compact hardware configuration, it is inexpensive, and because it is lightweight, it is easy to carry. According to the present invention, a test operation is performed in the free time of the microcomputer using a test information signal consisting of a test code and test data, so that various tests can be performed efficiently and without interfering with normal elevator control. It has the remarkable effect of being extremely easy to carry out.

[Brief explanation of the drawing]

Figures 1 to 5 and Figures 7 to 19
The drawings are diagrams showing an embodiment of the present invention, in which FIG. 1 is a block diagram showing the overall configuration of an elevator control device equipped with the maintenance device of the present invention, and FIG. FIG. 3 is a circuit diagram of the input device, FIG. 3 is a circuit diagram of the output device, FIGS. 4, 5, 7 to 19 are flowcharts of the program of the maintenance device of the present invention, and FIG. 6 is a program flowchart of the maintenance device of the present invention. This is a time chart showing the startup timing. 1, 5... Elevator control system, 2, 6... Elevator signal control device, 3... Group management control device, 4
...Maintenance device, 13...Microcomputer, 14...Interrupt pulse generation circuit, 16...Output (display) device,
17...Output control circuit, 18...Input device, 19
...Input/output interface circuit, 20...Memory, 21...Binary-hexadecimal conversion decoder, 22...
...Key contact circuit, 23...8-line to 3-line priority encoder, 24... Binary to hexadecimal conversion decoder, 25... Fluorescent display tube.

Claims (1)

[Scope of Claims] 1. In an elevator that uses a microcomputer in the signal control unit of an elevator that services between multiple floors to control the operation of the elevator, there is provided a plurality of test codes that command the types of tests for maintenance. an input device for inputting a test information signal consisting of test data indicating specific test conditions commanded by a test code; and a test operation of the elevator is performed during the idle time of the microcomputer based on the test information signal. An elevator maintenance device comprising: maintenance means built into the microcomputer; and an output device for displaying or printing an output from the microcomputer in response to the test information signal. 2. The elevator maintenance device according to claim 1, wherein the test code and test data are scanned and inputted by the microcomputer. 3. The elevator maintenance device according to claim 1, wherein the maintenance device includes a memory, one of the test codes has a memory content display command function, and the test data indicates an address of the memory. 4. The elevator maintenance device according to claim 3, wherein the test code has a function of displaying data at a memory address displayed by the test code in hexadecimal or binary. 5. The elevator maintenance device according to claim 4, wherein the test code for binary display has a function of specifying any bit of the memory address to be displayed. 6. The elevator maintenance device according to claim 1, wherein the maintenance device includes a memory, another one of the test codes has a memory content rewriting instruction function, and the test data indicates an address of the memory. . 7. Claim 6, wherein the rewriting instruction function inside the memory of the test code is a function of specifying a certain bit number in the address in addition to the contents of the address in the memory, and instructing to rewrite only the contents of the bit. Elevator maintenance equipment as described. 8. The elevator maintenance device according to claim 6 or 7, which has a memory protection function in which the test code having the rewriting command function performs the rewriting command only on the memory other than the limited memory. 9. The elevator maintenance device according to claim 3, 4, or 5, wherein the test code having the display command function also performs the test for incrementing or decrementing memory addresses. 10. The elevator maintenance device according to claim 6 or 7, wherein the test code having a rewrite command function also performs the test for incrementing or decrementing memory addresses. 11 Claims 3, 4, or 5 have a dynamic display function in which a microcomputer scans the memory contents displayed by a test code having a display command function at a constant cycle and sequentially displays them. Elevator maintenance equipment as described in section. 12. The elevator maintenance device according to claim 6 or 7, wherein the test code having a rewrite command function has a dynamic display function in which a microcomputer scans the memory contents at a constant cycle and sequentially displays them. . 13. The elevator maintenance device according to claim 11, wherein the test code having the display command function has a function of holding the dynamic display function. 14. The elevator maintenance device according to claim 12, wherein the test code having a rewrite command function has a function of holding the dynamic display function. 15 Command function to stop the process currently being performed by the other test code and return to the initial state, and command function to cancel the test code and test data input to the microcomputer from the input device and return to the initial state. An elevator maintenance device according to claim 1, comprising: