JPH0362648A - Rolling system - Google Patents

Abstract

PURPOSE:To send a required data at any time immediately by storing a data required for the transmission in a memory area the same capacity as a memory storing the data in a controller and a terminal equipment prior to the transmission. CONSTITUTION:When a controller 1 designates a terminal equipment 3 by a polling command Sp to allow the equipment 3 to send the data sent therefrom at its disposal for the communication, each equipment 3 writes and stores a data number and the data to an address 0 of a specific transmission data area 5 in a storage means 3a. In this state, the command Sp is sent from the equipment 1 and received, then the equipment 3 corresponding to the terminal equipment number in the command Sp reads the data in the area 5 and sends it to the controller 1 by the designation of an address 0 by an address signal in the command Sp. The controller 1 reads the data number from the data and writes the data to a corresponding address. Then the data number and the data to be sent are written and stored in the address 0.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method in which a plurality of terminal devices are connected to one control device via a common data bus, and data is collected from the plurality of terminal devices via the data bus. This relates to a bowling method that performs transfers, transfers, etc.

[Prior Art] For example, in a system in which a plurality of terminal devices are connected to one control device via a common data bus, boring is used as a transmission method for collecting and transferring data from the terminal devices via the data bus. The method is known. In this boring method, a boring command is sent from a control device that controls the movement of data on a transmission path to a predetermined terminal device, and the designated terminal device then sends data to the control device as a response signal.

Furthermore, to explain based on the memory configuration shown in FIG. 6, the data number and data content of one piece of data are stored in the memory, and the data number is specified in the terminal device by boring from the control device. Then, after detecting the data number from the corresponding memory and confirming the data position, the data is read out and transmitted to the control device. and,
This data is only received by the controller and stored in memory.

[Problems to be Solved by the Invention] By the way, when a single terminal device handles multiple pieces of data, if it is necessary to keep the boring time for all terminal devices within a certain time, it is possible to It is not possible to send all the data at once, and usually only the response data to the boring request is sent. As a result, unsent data is forced to wait until the next bowling, which requires a corresponding amount of time to send the data, which delays processing and prevents efficient communication.

Furthermore, when data is sent from a terminal device to a control device via a data bus, data specified by a boring command from the control device is sent from the terminal device. At this time, even if there was a request for urgent data transmission on the terminal device side, the data could not be transmitted unless the data was specified. Furthermore, even if the data were forcibly sent, there was a possibility that the receiving system on the control device side would be confused and the data could not be processed accurately.

Conversely, if the content of data sent on the data bus is left to the terminal device, emergency data can be sent early,
However, there was a problem in that the control device could not specify the data that it wanted to receive urgently.

Therefore, the present invention has been made in view of the above-mentioned problems, and its purpose is to leave the data output from the terminal device designated by the boring command to the terminal device, or to output the data based on the command from the control device. The control device can control the selection of whether to output data based on the transmission data stored in the memory area in the same space as the memory where multiple data are stored, and the necessary data can be transmitted immediately at any time to save processing time. The objective is to provide a boring method that can increase speed.

[Means for Solving the Problems] In order to achieve the above object, in the bowling method according to the present invention, a plurality of terminal devices are connected to one control device via a common data bus, and the plurality of terminal devices are connected to one control device via a common data bus. In a boring method that collects and transfers data from a terminal device, the terminal device has a data area in which a plurality of pieces of data to be transmitted to the control device are stored. has a specific transmission data area in which transmission data is stored, and when transmitting data from the terminal device to the control device, the data in the specific transmission data area is read by a boring command from the control device. , when the data specified by the control device is required, the address of the necessary data is added to the boring command, and the data is read by directly specifying the address of one data area in the terminal device. There is.

[Function] When transmitting data from a terminal device to a control device, the latest transmission data stored in a specific transmission data area of the terminal device is read by a boring command from the control device, and the data is sent to the control device. Sent. In addition, if data specified by the control device is required, add the address of the required data to the boring command,
The data is transmitted to the control device by directly specifying the address of the data area in the terminal device and reading the data.

[Embodiment] FIG. 1 is a diagram schematically showing the internal configuration of a control device and a terminal device to which a boring method according to the present invention is applied.

The boring method according to this embodiment uses an RA of the same capacity as a storage means in a control device and a terminal device connected to a bus.
By arranging M and specifying the address of the RAM, data transmission is performed to make the contents of both RAMs the same.

The control device l sends a boring command sp to a plurality of terminal devices 3 connected via the data bus 2, collects and transfers data sent from the terminal devices 3 as a response, and stores the data. It is comprised of means 1a, boring address designation means ib, data transmission/reception control means 1c, data number succession means 1d, data writing means 1e, and data rewriting means if.

The storage means 1a is constituted by a RAM, for example, and has a predetermined address 1 as shown in the memory configuration diagram of FIG.
= Various data D, -D, to be transmitted to the terminal device 3 in the order of n are stored. Also, address l −
Address O arranged in the same continuous space as = n constitutes a specific transmission data area 4, and this area 4 stores the number, data number, and data content of the terminal device 3 that sends the bowling command sp. ing.

The boring address designation means 1b determines the terminal device 3 to which the bowling command sp is to be sent from the data D in the storage means la, and sends the boring command Sp to the data transmission/reception control means 1c to designate the address O in the storage means 3a of the terminal device 3. It is sent to the terminal device 3 via.

The data transmission/reception control means IC transmits the boring command sp from the boring address designation means 1b to the designated terminal device 3, and receives data as a response signal from the terminal device 3.

The data number reading means 1d reads the data number in the data received by the data transmission/reception control means 1c.

The data writing means 1e writes data into the corresponding data number of the storage means 1a from the data number read by the data number reading means 1d.

The data rewriting means 1f rewrites the data in the specific transmission data area 4 in the storage means 1a when a data transmission request is issued to a specific terminal device 3, that is, the number and data number of the destination terminal device 3. and data is rewritten before sending.

The terminal device 3 is connected to the control device 1 at multiple points via the data bus 2, and when specified by the boring command sp from the control device 1, the terminal device 3 is controlled using the data of the address added to this signal as a response signal. The data is sent to the device 1, the storage means 3a, and the data transmission/reception control means 3.
b, data reading means 3c, and data rewriting means 3d.

As shown in FIG. 2, the storage means 3a has the same capacity and stores almost the same data as the storage means 1a in the control device 1, and the difference from the memory configuration of the control device 1 is as follows.
As shown in FIG. 3, the address number and data of the data to be transmitted when the ball is bowled next are stored in the address O of the specific transmission data area 5.

The data transmission/reception control means 3b receives the boring command sp from the control device 1, and transmits data responded to by this boring to the control device l.

The data successive means 3c specifies the corresponding address in the storage means 3a based on the address signal added to the boring command sp, and reads data from the storage means 3a.

The data rewriting means 3d rewrites the data number and data of the specific transmission data area 5 shown in FIG. This is done before it is sent.

Next, the boring operation with the above-described configuration will be explained based on the flowcharts shown in FIGS. 4 and 5.

First, when a terminal device 3 is specified by a boring command sp from the control device 1, and data transmitted from the specified terminal device 3 is left to the terminal device 3 for communication, each terminal device 3 has a storage means. The data number and data are written and stored in address O of the specific transmission data area 5 in 3a (STI). In this state, when a boring command Sp is sent from the control device l and received (Sr1), the terminal device 3 corresponding to the terminal device number of this boring command Sp is assigned an address O by the address signal in the boring command Sp. (Sr1), and the data in the specific transmission data area 5 is read out and transmitted to the control device 1 (Sr1). Control device 1 reads the data number from this data (Sr1)
, writes data to the corresponding address (Sr6). Next, the data number and data to be transmitted are written to address O and stored (STI), and when the above operations are completed, the terminal device 3 waits until the next boring command is sent from the control device (Sr1).

Next, when transmitting data by specifying the terminal device 3 from the control device 1, first, the number of the terminal device 3, the data number, and the data are stored in the address O of the specific transmission data area 4 in the storage means of the control device 1. Write and store it (Sr1).

In this state, when a boring command sp is sent to the terminal device 3 whose number is stored in the address O (Sr9
), this terminal device 3 reads the data at the corresponding address and transmits it to the control device 1 (STIO). The control device reads the data number from this transmitted data (ST11
), is written to the corresponding address of the storage means 1a (ST
12) When zero or more operations are completed, the terminal device 3 waits until the next boring command is sent from the control device (ST13).

As described above, boring by the control device 1 is limited to specifying the terminal device 3, and the content of data sent from the terminal device 3 is left to the terminal device 3, and when the data specified by the control device 1 is required, Only the boring command sp is sent with the address of the necessary data added.

That is, the control device 1 does not designate the data number, but directly performs boring on the address 7 of the storage means 3a where the data of the terminal device 3 is stored, and the terminal device 3 that receives this The data at the specified address will be output. As a result, even if one terminal device 3 handles a plurality of data and it is necessary to keep the boring time for all the terminal devices 3 within a certain period of time, the necessary data can be stored in advance in the storage means 1a, By storing it in the specific transmission data area 4.5 in 3a, all the data required by each device can be collected at once by boring in the l order, reducing the data transmission time and increasing the processing speed. communication and efficient communication. Further, even if there is a request for immediate data exit on the terminal device 3 side or data that the control device 1 wants to receive urgently occurs, the data can be stored in advance in the storage means 1a.
, 3a, the data can be processed without disrupting the receiving system on the control device l side.

[Effects of the Invention] As explained above, the boring method according to the present invention has the following effects:
By storing the data necessary for transmission in a memory area in the same space as the memory where the data is stored in the control device and the terminal device before sending, the data to be output from the terminal device specified by the boring command can be transferred to the terminal device. The control device can control the selection of whether to output data based on commands from the control device or to output data based on commands from the control device, so even if emergency data transmission occurs, the necessary data can be sent immediately and processed. It is possible to speed up the time and perform efficient communication.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of a control device and a terminal device to which the bowling method according to the present invention is applied, FIG. 2 is a memory configuration diagram of a data area of a storage means in the control device and terminal device, and FIG. 4 and 5 are flowcharts for explaining the boring operation according to the boring method of the present invention, and FIG. 6 is a diagram showing the configuration of the specific transmission data area of the storage means, and FIG. FIG. 2 is a memory configuration diagram. DESCRIPTION OF SYMBOLS 1...Control device, 2...Data bus, 3...One terminal device, 4.5...Specific transmission data area, Sp...
bowling command.

Claims (1)

[Scope of Claims] A boring method in which a plurality of terminal devices are connected to one control device via a common data bus, and data collection, transfer, etc. from the plurality of terminal devices are performed via the data bus, The terminal device has, in addition to a data area in which a plurality of data to be transmitted to the control device are stored, a specific transmission data area in which the latest transmission data by the terminal device among the data is stored; When transmitting data from the device to the control device, the data in the specific transmission data area is read by a boring command from the control device, and if the data specified by the control device is required, the boring A boring method characterized in that data is read by adding an address of required data to a command and directly specifying an address of a data area in the terminal device.