JPH03141405A - Man-machine interface for nc device - Google Patents

Abstract

PURPOSE:To attain the high speed display by providing a fixed picture format storage part to a display control part to store the formats of various fixed pictures and then providing a signal processing part which gives the data inputted via a serial communication circuit to the format of the fixed picture for formation of a display picture and a fixed screen retrieving part. CONSTITUTION:A fixed picture format storage part 26 is provided to a display control part 19A which performs the display to store the formats of various fixed pictures. At the same time, a signal processing part 29 is provided to gives the data inputted via a serial communication circuit to the format of the fixed picture formation of a display picture together with a fixed picture retrieving part 28. That is, the part 26 is added to the part 19A of a man- machine interface 9 and the data inputted from the NC devices 1-3 are given to the formats of the fixed pictures stored in the part 26 for acquisition of a display picture consisting of the fixed picture and the fluctuation data stored in the fixed picture. In such a constitution, the communication time is shortened for display of the fixed picture and the display speed is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a man-machine interface connected to an NC device of a machine tool.

(Prior art) A man-machine interface consisting of a CRT and MDi (manual data input) is connected to the NC device of various machine tools, and is used to display machine status, edit data, and issue commands to the machine. do.

Here, the man-machine interface is normally placed at a distant position in the vicinity of the machine, and usually N
It is connected to device C via a serial communication line.

On the other hand, in recent years, the amount of data used by NC devices has increased, and this data is managed in a database.

For example, for press brakes, mold shape data for interference checking, workpiece data for bending, fuzzy control data, bending control data for each type of workpiece created in advance, etc. are compiled into a database. Ru.

Furthermore, in punch presses, mold shape data, data regarding workpiece materials, workpiece shape data for basic workpieces, etc. are compiled into a database.

In the conventional man-machine interface of an NC device, various fixed screen formats are stored in relation to the database and transmitted to the man-machine interface side via a serial communication line when necessary. I was supposed to.

(Problem to be Solved by the Invention) However, in the conventional screen control method in which fixed screen format data is transmitted from the NC device side to the man-machine interface side via a serial communication line, the data transmission There is a problem in that it takes a lot of time and increases the load on the NC device.

In other words, when displaying data on a CRT screen via communication, 1
For example, if characters are sent one by one through a transmission line, 9600
It takes about 1.1 mS to send one character at a transfer rate of 8 PS, and naturally the larger the amount of data to be transferred, the longer it will take to display.

In particular, when graphics are displayed on a CRT screen, coordinate data of points is required, so as the graphics become more complex and the number of screens increases, the time required for communication increases and efficiency deteriorates.

Therefore, the present invention provides a man-machine interface for an NC device that can reduce communication time for fixed screen display, increase display speed, and does not place an unnecessary burden on the NC device. The purpose is to

[Structure of the invention]

(Means for Solving the Problems) The present invention for solving the above problems is based on an NC that controls a machine tool.
The NC is connected to the device via a serial communication line.
NC that performs appropriate display and appropriate operations while communicating with the device
In the man-machine ink face of the device, the display control unit for performing the display is provided with a fixed screen format storage unit that stores various fixed screen formats, and the fixed screen format is inputted via the serial communication line. The present invention is characterized in that it includes a signal processing section and a fixed screen search section that provide data to configure a display screen.

(Function) In the present invention, a fixed screen format storage section is provided in the display control section of the man-machine ink face, and data input from the NC device side is given to the fixed screen format stored in this storage section. Construct a display screen consisting of variable data to be written on a fixed screen.

(Example) The present invention will be explained in detail below.

First, to show the connection relationship between a general NC device and a man-machine interface, in FIG.

The RAM 3 in this example is backed up by a battery.

The system bus 4 includes a general digital input (Di) 5, a digital output (Do) 6, a programmable controller (PC) 7, and a bidirectional (DP-)R.
AM8, Serial Ink Face (SIO) 9.10.
11, a parallel interface (PIO) 12 is connected.

Di5 and Do6 include actuators 13A such as solenoid SQL and sensors 1 such as limit switch LS.
A connector module 14 is connected to receive and receive digital signals from the 3B.

Connected to the DP-RAM 8 is a positioning control module CPCM) 16 that provides a control signal to a servo amplifier 15 that drives a servo motor Ms to which an encoder E and a tacho generator TG are attached. 5I09 includes color CRT17 and M
Dt18 is connected via CRT and MDi controller 19. 5fO10 has an NC device (1, 2,
3) a control panel 20 for giving operation signals to
are connected via a control panel controller 21. A paper tape reader 22 is connected to the PIO 12. A database 23 is connected to 5IOII.

In the above configuration, for example, from the paper tape reader 22 to the NC
When a program is entered, the CPUI interprets it and
The servo motor Ms is controlled via the PCM 16. Further, the PC 7 receives signals from the sensors 13B and drives the actuators 13A at appropriate timing.

On the other hand, the CRT 17 and MDi 18, which serve as man-machine interfaces, display appropriate displays to the operator using the CRT 17, while receiving operator operation data from the MDt 18, and perform data editing, program editing, status display, alarm processing, and maintenance. Various processes such as dialogue are explained or executed using dialogue screens as appropriate.

The database 23 stores and stores various data necessary for control according to the control target of the NC device (1, 2, 3). For example, in a press brake, work data, material data, machine data, mold shape data, etc. necessary for bending control are stored.

FIG. 1 shows a portion related to CRT control (CRT controller) of the CRT 17 and MDi controller 19.
Details of 19A are shown.

In the figure, the CRT controller 19A of this example has 5I
It is provided with a buffer 24 for temporarily storing data inputted from the CRT 17, and a write processing section 25 for performing writing processing on the CRT 17. In addition, in this example, the CRT 17
A fixed screen format storage unit 26 that stores a format for giving a fixed screen to a fixed screen, a fixed screen editing unit 27 that edits this fixed screen, a fixed screen search unit 28 that searches for edited and stored fixed screens, and each member. 24, 25.26, and 27.28.

In the CRT controller 19A having the above configuration, the CRT
17, various explanation or dialogue screens are displayed using appropriate graphics, and variable data such as the current position is written as appropriate on this fixed screen.

An example of the display screen is shown in FIG.

The display screen of this example shows the playback operation procedure in the press brake. In other words, in the press brake of this example, the bending process can be edited as a preliminary process, and based on the already edited process data,
This can be reproduced step by step. However, this procedure must be performed in order to bend the workpiece at a predetermined position with high precision by appropriately reversing the workpiece as it deforms sequentially, so it is important to avoid mistakes in the operating procedure due to confusion. , the operation is guided using an explanation screen (guidance).

In the figure, the configuration of the control panel 20 is illustrated on the left side of the screen. Further, on the right side of the screen, the playback operation procedure is explained using characters and arrow figures. Furthermore, the contents of the soft switch (previous process, next process, set, all set) are displayed on the bottom row, and the message text (no display during automatic start) is displayed above (middle row).
is displayed.

In the figure, the portion indicated by the symbol "XxX" is variable data, such as NO, XxX1 work name XXX, and so on, and the remaining portion represents the fixed screen.

Now, in this example, when displaying the screen as shown in FIG. 3, if the NC device side commands to display this screen,
In accordance with the instructions shown in the figure, display processing is performed in accordance with the procedure shown in FIG.

That is, in FIG. 4, the instruction is ESC code (1
The signal processing section 29, which receives this instruction via the buffer 24, executes the procedure shown in FIG. 5.

In FIG. 5, in steps 501, 502, and 503, the ESC code 30, instruction code 31, and display fixed screen number 32 are determined, and in step 504, the fixed screen shown in FIG. 3 is retrieved from the fixed screen format storage unit 26. , performs reading processing, and displays the fixed screen in step 505. If the determination in step 503 is negative (NO), the data is variable data, so a write process for the variable data is performed.

Therefore, in this example, when instructing a fixed screen on the NC device side, it is sufficient to transmit a 1-byte display fixed screen number, so that the transmission time can be minimized.

That is, if the fixed screen data shown in FIG. 3 is to be transmitted from the database 23 side, there are approximately 240 double-byte characters in this example, so if the transmission speed is 96008 PS, it will take (240 + 140 x 2) characters x 1.1 m5j = 0.6 seconds. . Furthermore, since graphic data such as coordinate data and line type and length are added to this, even more transmission time is required. Therefore, the display speed becomes slow and N
The load on the C device will increase, and the original axis control will also be affected, such as having to take a longer sampling time. In contrast, in this example, 3 characters x 1.1 m5 - 3.3 ms
Since the display speed can be increased, the NC device only needs to be aware of the process of transmitting variable data through distributed processing, so there is no need to place an unnecessary burden on the NC device.

FIG. 6 shows a flowchart of the fixed screen editing method performed by the fixed screen editing section 27.

In this example, first, in step 601, a reference screen as shown in FIG. 3 is stored.

Therefore, when screen editing is instructed in step 602, the database 23 is searched in step 603, required data is input, and edited and stored in step 604.

In this example, since the screen can be edited as appropriate, for example, when it is desired to display the shape of a workpiece or mold on a fixed screen serving as a reference, it is possible to create a fixed screen on which the shape is displayed using actual data from the database 23.

The present invention is not limited to the above-mentioned embodiments, but can be implemented in any appropriate manner by making appropriate design changes.

〔Effect of the invention〕

As described above, the present invention provides a fixed screen format storage section in the display control section, and allows the fixed screen format to be stored in this storage section to be NC.
Since it is a man-machine interface that provides data input from the device side and configures a display screen consisting of a fixed screen and variable data written on this fixed screen, it reduces the communication time with the NC device and increases the display speed. can be increased, and no unnecessary burden is placed on the NC device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a man-machine interface of an NC device according to an embodiment of the present invention, and FIG.
A block diagram showing the connection relationship between the device and the man-machine ink face, Fig. 3 is an explanatory diagram showing an example of a display screen, Fig. 4 is an explanatory diagram showing a screen display command method, and Fig. 5 is a display processing method using the above command. FIG. 6 is a flowchart showing the screen editing method. 1... CPU 2... ROM 3... RAM 9... Serial interface 17... CRT 19A... CRT controller 24... Buffer 25... Write processing section 26... Fixed Screen format storage unit 27...Fixed screen editing unit 28...Fixed screen search unit 29...Signal processing unit

Claims (2)

[Claims] (1) To perform the above display on the man-machine interface of the NC device that is connected to the NC device that controls the machine tool via a serial communication line and performs appropriate displays and appropriate operations while communicating with the NC device. a signal processing section that configures a display screen by providing a fixed screen format storage section for storing various fixed screen formats in the display control section of the display controller; NC featuring a fixed screen search section
Device man-machine interface. (2) In the man-machine interface of the NC device according to claim 1, the fixed screen format storage section stores mold shape data and workpiece shape data input from the NC device side via the serial communication line. A man-machine interface for an NC device, characterized by comprising a fixed screen editing section that transforms a fixed screen format using unique data of the NC device.