JPH08147007A - Method for data transmission between controller and programmable display device - Google Patents

Abstract

PURPOSE: To prevent a display cycle from being delayed by putting plural data groups together in blocks, giving numbers to them, block by block, and registering them in controllers, and instructing a controller to transmit the block data given a specified number to a programmable display device from the controller. CONSTITUTION: Plural data groups which are referred to when the programmable display device 2 is placed in operation are put together in blocks, which are each given a number and registered in a controller 1. Further, the number given to a block to be referred to is specified to the controller 1. The controller 1 sends the data of the block given the specified number to the programmable display device 2 through a transmission line 3. Consequently, unnecessary processes can be omitted and the display cycle is never delayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission method between a programmable controller, a robot controller or a controller for numerical control and a programmable display device.

[0002]

2. Description of the Related Art Conventionally, this type of data transmission method is, for example, a system in which a programmable controller 1 and a programmable display device (hereinafter referred to as a display device) 2 as shown in FIG. 7, the display device 2 sends a command of the format shown in FIG. 7A to the controller 1 to request the data to be referred to, and the response of the format shown in FIG. 7B transmits the data requested by the controller 1. It was transmitted to the display device 2 via the path 3. Here, in the programmable display device, a user program is built in, and the display is controlled by this.

[0003]

The above-described conventional data transmission method between the controller and the programmable display device is versatile because any controller can be easily accessed. If desired, the controller must be requested twice or more times. For example, when three discontinuous register data and one I / O data are to be displayed on the display device, It is necessary to send a total of four commands, three commands requesting register data and one command requesting I / O data, and dozens of exchanges are required to receive the data making up one screen. In some cases, there is a disadvantage that there is much waste and the display cycle becomes slow.

An object of the present invention is to provide a data transmission method between a controller and a programmable display device, which does not delay the display cycle due to a large amount of processing when receiving and displaying the data of the controller on the programmable display device. It is to be.

[0005]

SUMMARY OF THE INVENTION A data transmission method between a controller and a programmable display device according to the present invention includes a plurality of data groups to be referred to by a user operating the programmable display device, which are grouped into blocks. A step of assigning a number to each controller and registering it in the controller, a step of assigning a number assigned to the block to be referred to from the programmable display device to the controller, and a block to which the assigned number is assigned Data from the controller to the programmable display device. The controller includes one that is a programmable controller.

The controller includes one which is a robot controller. The controller includes a controller for numerical control.

[0007]

When a number assigned to a block is designated, data of a plurality of data groups registered in the block is transmitted, so that a plurality of discontinuous register data and a large number of I / O data are displayed. Even when trying to do so, it is not necessary to repeat many commands and data transmissions, wasteful processing can be omitted, and the display cycle is not delayed.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a flow chart showing a procedure of an embodiment of a data transmission method between a controller of the present invention and a programmable display device (hereinafter referred to as a display device), and FIG. 2 is stored in the controller in the data transmission method of FIG. FIG. 3 is a diagram showing a data group, FIG. 3 is a diagram showing an example in which the data group of FIG. 2 is grouped into blocks, FIG. 4 is a format diagram of a command requesting block # 1 of FIG. 3, and FIG. 5 corresponds to the command of FIG. It is a format diagram of the response transmitted by. The data transmission method between the controller and the programmable display device is performed as follows in the system of FIG.

Here, when the controller 1 is turned on,
Assuming that there is registered data described later, the data group shown in FIG. 2 is stored.
Further, it is assumed that the display device 2 has a user program built therein on the assumption that there is data registered in the controller 1. The procedure of this data transmission method is as shown in FIG.
Data group 21 and data group 2 shown in FIG.
The data groups to be referred to are grouped into blocks from the data group 2N, and the blocks are numbered and registered in the controller 1 (step 11). In this case, as shown in FIG. 3, the data groups 21 and 22 are combined into a block, and the block number is # 1. In the format of FIG. 3, the number of data groups 31 is 2, and the data groups 32 and 33 show specific examples of the data groups 21 and 22.

Next, the user of the display device 2 notifies the controller 1 from the display device 2 by a command as shown in FIG. 4 designating the number # 1 assigned to the block to be referred to (step 12). Here, the block number 41 in the command is # 1. When the controller 1 receives the command of FIG. 4, the command indicates #
The blocks numbered 1, that is, the data 51 and 52 of the data groups 32 and 33 are transmitted to the display device 2 on the transmission line 3 by the response shown in FIG. 5 (step 13). The processes of steps 12 and 13 described above are repeated a necessary number of times. In this data transmission method, desired data is transmitted to the display device only by designating the number attached to the block in which the data group to be referred to is collected. Therefore, the request command to the controller and the number of times of data transmission are, for example, 1
As few times as possible.

In the data transmission method between the controller and the display device according to the present embodiment, it is possible to eliminate the waste of performing unnecessary processing for the command and transmission for displaying on the display device and delay the display cycle. Absent. Although the controller is a programmable controller in this embodiment, it may be a robot controller or a numerical controller.

[0012]

As described above, according to the present invention, by grouping a plurality of data groups into blocks and registering them in the controller, if the registered block number is designated, the data to be referenced is issued at least once. When displaying a screen based on the data stored in the controller on the programmable display device, the number of times required for command and data transmission is not wasted and there is no delay in the display, and the display speed is high. It has the effect of being improved.

[Brief description of drawings]

FIG. 1 is a flowchart showing a procedure of an embodiment of a data transmission method between a controller and a display device of the present invention.

FIG. 2 is a diagram showing a data group accumulated in a controller in the data transmission method of FIG.

FIG. 3 is a diagram showing an example in which the data group of FIG. 2 is collected in blocks.

FIG. 4 is a format diagram of a command requesting block # 1 in FIG.

5 is a format diagram of a response transmitted corresponding to the command of FIG.

FIG. 6 is a schematic diagram of a system in which a controller and a display device are coupled by a transmission path.

7 (a) is a format diagram of a conventional example of a command used in the system of FIG. (B) is a format diagram of a response used corresponding to the command of (a).

[Explanation of symbols]

 1 Controller 2 Display Device 3 Transmission Line 11, 12, 13 Steps 21, 22, ..., 2N, 32, 33 Data Group 31 Number of Data Group 41 Block Number 51, 52 Data

Claims (4)

[Claims] 1. A data transmission method for requesting data to be displayed on a programmable display device from a controller and transmitting the requested data from the controller to the programmable device, wherein a user operating the programmable display device refers to the data. A plurality of data groups to be collected are grouped into blocks, a number is assigned to each block and registered in the controller, and the programmable display device specifies the number assigned to the block to be referred to the controller. A method of transmitting data between a controller and a programmable display device, comprising: a procedure; and a step of transmitting data of the block to which the designated number is given from the controller to the programmable display device. 2. The data transmission method between a controller and a programmable display device according to claim 1, wherein the controller is a programmable controller. 3. The data transmission method between a controller and a programmable display device according to claim 1, wherein the controller is a robot controller. 4. The data transmission method between a controller and a programmable display device according to claim 1, wherein the controller is a numerical controller.