JPH0346975A - Elevator control device - Google Patents

Abstract

PURPOSE:To simplify a circuit and save labor at the time of adjustment and maintenance by providing one transmission interface between one console and plural microcomputers and selecting one of the microcomputers according to the data sent from the console. CONSTITUTION:One transmission interface 5 is connected to a multipath 3 between one console 4 and plural (two in the drawing) microcomputers 1, 2. The transmission interface 5 and the transmission control switching parts 6 of the microcomputers 1, 2 are connected by a path line 8, and signals outputted from the transmission interface 5 are inputted into the microcomputers 1, 2 simultaneously and further inputted into monitor parts 7 through the transmission control switching parts 6. The multipath 3 and local paths 9 in the microcomputers 1, 2 are connected by multipath interfaces 10. The transmission control switching part 6 of the microcomputer 1 or 2 is selected according to the data from the console 4. The reconnection of the connecting line to the console 4 becomes therefore unnecessary, and labor at the time of adjustment and maintenance can be saved.

Description

Detailed Description of the Invention [Purpose of the Invention (Industrial Application Field) This invention provides a console that controls an elevator with a plurality of microcomputers, and has a keyboard for data input and a display for data observation. , relates to an elevator control device that transmits and receives data to and from a microcomputer to observe control conditions.

(Prior Art) In recent years, the use of microcomputers (hereinafter referred to as control microcomputers) in elevator control devices has progressed, and most of the sequence control has come to be processed within the control microcomputers. Furthermore, the control of the electric motor that is the power source for elevators has progressed to digitalization, and is now controlled by a control microcomputer.

If almost all control is performed within the control microcomputer as described above, it becomes difficult to observe the control state of the elevator from the outside. Therefore, to help observe the control status, a console with a keyboard for data manual input and a display for data observation has been used.

This console is connected to the control microcomputer via a general-purpose transmission interface such as R3232C or a dedicated interface, and itself operates as a terminal for the control microcomputer.

On the other hand, since the control microcontroller used in elevators handles almost all the controls, the load on a single control microcontroller is too large, so multiple control microcontrollers have come to be included in one elevator control device. .

Digital input/output devices (DI/Do), serial transmission, and the like are sometimes used as an interface between a plurality of control microcomputers, but multipath is often used because of its excellent transmission speed and expandability.

FIG. 7 shows a configuration example of an elevator control device in which a plurality of control microcomputers share a multipath.

In the figure, the control microcomputer 1 and the control microcomputer 2 share a multipath 3. In each control microcomputer 1.2, a transmission interface 5. CPU12
．． ROM13. RAM14゜I/O device (Ilo) 15
and multipath interface 10 is local bus 9
Of these, the console 4 is connected to the transmission interface 5, and the multipath 3 is connected to the multipath interface 10.

According to this configuration, since each of the control microcomputers 1.2 is provided with the transmission interface 5, the control microcomputers themselves can perform the processing necessary to observe the control state. As a result, the console becomes a mere terminal for the monitoring software in the control microcomputer, and various consoles can be used.

(Problem to be Solved by the Invention) However, in the conventional elevator control device described above, since control microcomputers each having a transmission interface are used, the console is connected to one control microcomputer for adjustment or adjustment. If it becomes necessary to observe the control status of other control microcomputers during maintenance, the console must be reconnected each time, which increases the amount of time and effort required for investigation and maintenance. There was a point.

Furthermore, because conventional elevator control equipment uses control microcomputers with transmission interfaces, each time the number of elevators increases, the transmission interfaces with the same function become redundant, leading to an increase in costs. There were also problems.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an elevator control device that can save time and effort during adjustment and maintenance, and can reduce device costs.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides an elevator in which the elevator is controlled by a plurality of control microcomputers, and the control state is observed by transmitting and receiving data between a console and the control microcomputers. The control device includes a transmission interface having one end connected to the console and the other end commonly connected to the plurality of control microcomputers, and one of the plurality of control microcomputers that transmits and receives data to and from the console. The transmission switching means is equipped with transmission switching means that switches at any time based on data sent from the console.

(Function) In the elevator control device of the present invention, the console is able to send and receive data to and from all control microcomputers via one transmission interface, and it is also possible to determine which control microcomputer the data is actually sent to and received from. is configured to be selected by operating the console's keyboard, and by operating the console's keyboard and inputting a command to select the control microcontroller to be connected to a predetermined console, the console will transmit this command as a series of data strings. The data is output to the control microcomputer, and the control microcomputer interprets this data string and determines whether or not its own microcomputer should perform data transmission/reception with the console.

Therefore, even if it becomes necessary to send and receive data with another control microcomputer during adjustment or maintenance, you can connect to the control microcomputer with which you want to transmit data simply by inputting a selection command using the console's keyboard. This saves extra effort during adjustment and maintenance. Furthermore, even if the number of control microcomputers increases, only one transmission interface is required, and no additional transmission interfaces are required.

(Example) Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. 1st
The elevator control device shown in the figure is composed of two microcomputers, microcomputer 1 and microcomputer 2. Microcomputer 1.
The two are connected by multipath 3, and multipath 3
A transmission interface 5 to the console 4 is provided above.

The control signal output from the transmission interface 5 is input to the microcomputer 1 and the microcomputer 2 at the same time, and is input to the monitor part 7 via the transmission control switching section 6 inside each microcomputer 1 and 2. ing.

The transmission interface 5 is connected to the transmission control switching unit 6 and monitor part 7 inside each microcomputer 1 and 2 by a path line 8, and the multipath 3 and the local bus 9 inside each microcomputer 1 and 2 are connected to each other by a path line 8. is multipath interface 1
Connected at 0.

A common RAM II is provided on the multipath 3 for transmitting and receiving data between the microcomputers 1 and 2, and the transmission control switching unit 6 inside each microcomputer 1 and 2 is connected to this common RAM II.
Linked to data on MII.

Transmission between the console 4 and the control microcomputer 1 or 2 must be performed by dividing a series of data strings into certain units, regardless of whether the transmission is serial or parallel. This unit is usually a1 byte.

In order for this one unit of transmission or reception to be performed without interruption, one unit of reception request (one unit of data is sent from the console 4) or one unit of transmission request (one unit of data sent to the console 4) is required. ) must be notified to microcomputer 1 or microcomputer 2. This is the transmission control signal.

It is based on this transmission control signal that microcomputer 1 or microcomputer 2 performs transmission processing.
Although both can read and write to the transmission interface 5, the transmission control switching section 6 of the microcomputer 1 transmits the transmission control signal to the monitor part 7 of the microcomputer 1, while the transmission control switching section 6 of the microcomputer 2 transmits the transmission control signal. If the signal is not transmitted to the monitor section 7 of the microcomputer 2, only the microcomputer 1 will transmit data to and from the console 4 via the transmission interface 5. In the opposite case, microcontroller 2
only communicates with the console 4 via the transmission interface 5.

In Fig. 1, there are two microcomputers that make up the elevator control system, but even if there are three or more microcomputers, the added microcomputers should have the same configuration as microcomputers 1 and 2.
The transmission control signal output from the transmission interface 5 may be connected in the same manner.

FIG. 2 shows a detailed hardware configuration of an embodiment of the present invention. In this embodiment, the transmission between the console 4 and the control microcomputer 1.2 is carried out by serial transmission, and the transmission control signal is a wired OR between the reception request and the transmission request, and the transmission control signal is sent to each control microcomputer 1, 2 (7). ) CPU
12 are input as interrupt signals (A) and (C7).

The control microcomputer 1 includes a CPU 12, ROM13, and RA.
The M14, output device 15, etc. are connected via a local bus 9, and the local bus 9 is connected to the multipath 3 via a multipath interface 10.

The CPU 2 can freely read and write to the common RAM II on the multipath 3 via the multipath interface 10, and can also freely read and write to the transmission interface 5.

The other control microcomputer 2 has a similar configuration. And the two control microcomputers 1 and 2 are multipath 3
By writing and reading data to and from the upper common RAM II, information can be exchanged with each other.

The console 4 has a display 16 and a keyboard 17. Transmission control switching section 6゜monitor part 7 shown in Fig. 1
is composed of software, the program is stored in the ROM 13, and the CPU 12 processes it.

FIG. 3 shows a process in which the microcomputer 1 or 2 decides whether to accept an interrupt signal, which is a transmission control signal, from the transmission interface 5.

First, it is checked whether the console connection data is for the own microcomputer (step Sl). Here, the console connection data is defined by a certain address of the common RAM II on the multipath 3, and indicates a microcomputer that sends and receives data to and from the console 4. For example, assume that this data is 1 byte, and when it is 0 to 7FH, it is for microcomputer 1, and when it is 80H-FFH, it is for microcomputer 2. Incidentally, at this time, it is necessary to prevent the phenomenon that the console 4 is not connected at all by selecting one of the microcomputers 1.2 for all possible values.

If this console connection data is 0 when the power is turned on to the system shown in Fig. 2, the CPU code data of microcomputer 1 indicates its own microcomputer at step S1, and then the transmission interface 5 to enable the interrupt signal (a) from the transmission interface 5 (step S2), and set reception permission to the transmission interface 5 (step S2).
3).

Conversely, for the microcomputer 2, since it is determined in step S1 that the console connection data is not from the microcomputer itself, interrupts from the transmission interface 5 are prohibited (step S4).

Next, the subsequent operations of the microcomputers 1 and 2 by keyboard operations on the console 4 will be described. First, consider the case where data is received from the console 4.

Since the console 4 operates simply as a terminal, when a key on the keyboard 17 of the console 4 is operated, the console 4 transmits a code corresponding to that key.

Now, assuming that only the microcontroller 1 allows the interrupt signal (a) from the transmission interface 5, the console 4
The transmission interrupt processing of the microcomputer 1 operates due to the transmission from the microcomputer 1, but the transmission interrupt processing of the microcomputer 2 does not operate.

This transmission interrupt processing is a part of the function of the monitor part 7 in FIG.
It is shown in the figure. When an interrupt is received from the transmission interface 5, it is first determined whether the interrupt is a reception request (step 511). This can be known by reading the status register of the transmission interface 5. In general, most ICs for transmission interfaces for general-purpose serial transmission have such a status register, but if there is no status register, interrupts from the transmission interface 5 can be used for both reception and transmission.
The type may be input to the CPU 12.

If it is determined in step 51 that there is a reception request, then one byte of reception data is read from the transmission interface 5 (step 512).

Next, it is determined whether the received data is a special code (step 813). Special codes include a code that indicates the end of a command from the console 4 (for example, an ASCII code for a carriage return), a code that stops a command midway, a code that temporarily interrupts transmission, and a code that erases previously received data (backspace). etc., and these are determined in advance.

If the received data is not a special code, the received data is written to the position indicated by the receive pointer of the receive buffer provided on the RAM 14, and the receive pointer is incremented (step 514).

When the received data is a special code, its processing is performed (step 515).

Next, when transmitting to the console 4, in response to a command received from the console 4, a command that requires a response, such as a command to read the contents of a specified address on memory, is processed. (step 516).

The reason why this transmission request becomes YES is because the monitor unit 7
If it is determined that it is necessary to return data in response to the command received from the console 4, it sets the transmission data and the number of bytes of the transmission data (step 531) as shown in FIG. 5, and clears the transmission pointer to zero (step 531). 532), the transmission interface 5 is enabled for transmission (step 533).

Therefore, when the transmission interface 5 enters the transmission permission state, the CPU 12
It is determined in step S16 of FIG. 4 whether or not the interrupt is a transmission request. This determination is made based on the status of the transmission interface 5, similar to step S11.

When it is determined in step 816 that there is a transmission request, it is then determined whether transmission has ended (step 17). Here, if the number of transmitted bytes and the transmission pointer are equal, the transmission is completed.

If the transmission is not completed, the transmission data is written to the transmission interface 5 in step 518, and the transmission pointer is incremented.

If the transmission is completed in step 317, step S19
The transmission interface 5 is prohibited from sending.

The data written to the transmission interface 5 in this way is converted to serial data and sent to the console 4,
It is displayed on the display 16 of the console 4.

In the above embodiment, the keyboard 17 of the console 4
Although the explanation has been made assuming that the console 4 itself performs the display on the display 16 in response to the operation, the control microcomputer 1.2, which is the host,
It is also possible to perform all display control.

At this time, the received data may be transmitted every time one byte is received from the console 4.

Furthermore, the monitor part 7 has a processing function for decoding received data in addition to the processing shown in FIGS. 4 and 5 described above. As an example of such an operation, FIG. 6 shows a flowchart of processing when the input data is a command to switch the microcomputer that transmits and receives data to and from the console 4 to another microcomputer.

When a console connection switching command is input from the console 4, the transmission interface 5
reception is prohibited, and data input from the console 4 is prohibited.

Next, if there is a process in progress of sending according to a command from the console 4, wait until all the processes are completed (step 542), and after all sending and receiving is completed, the transmission interface 5 is prohibited from sending (step 843). ).

As a result, the transmission and reception of data between the console 4 and the microcomputer 1 or 2 has been temporarily completed, so the connection with the console 4 is disconnected by prohibiting interrupts from the transmission interface 5 (step 544).
Then, the console connection data on the common RAM 1-1 is converted from the console 4 to the designated microcomputer 1 or microcomputer 2 (step 545).

Thereafter, the transmission control switching unit 6 of the other designated microcomputer waits for an input from the console 4 through the process shown in FIG. 3, and then receives a command from the keyboard of the console 4.

In this example, there were two sets of control microcontrollers, but
Even in the case of three or more sets, it can be easily realized by providing the same processing routine in each microcomputer.

C. Effects of the Invention] As described above, according to the present invention, when it is desired to change the transmission target control microcomputer that processes commands from the console to another one during adjustment and maintenance, the change can be done simply by software. This eliminates the need to replace the connection wire to the console, which saves labor during adjustment and maintenance. Further, only one piece of hardware is required for the interface section with the console, and only one piece of additional hardware is required, such as transmission switching means, so costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a functional block diagram of an embodiment of the present invention, Fig. 2 is a block diagram showing the hardware configuration of an embodiment of the invention, and Fig. 3 is a flowchart of processing of the transmission control switching section in the above embodiment. , FIG. 4 is a flowchart of interrupt processing from the transmission interface of a part of the monitor in the above embodiment, FIG. 5 is a flowchart of processing for setting a transmission request of a part of the monitor in the above embodiment, and FIG. 6 is a flowchart of the processing of setting a transmission request of a part of the monitor in the above embodiment. FIG. 7 is a block diagram showing the hardware configuration of a conventional example. 1.2... Microcomputer 3... Multipath 4... Console 5... Transmission interface 6... Transmission control switching section 7... Part of monitor 9... Local bus

Claims (1)

[Claims] In an elevator control device that controls an elevator using a plurality of microcomputers, and also transmits and receives data between the microcomputers and a console having a keyboard for data input and a display for data observation to observe the control state. a transmission interface that is connected to the console and whose other end is commonly connected to the plurality of microcomputers; 1. An elevator control device comprising: transmission switching means for switching at any time.