JPH0348904A - Numerical controller - Google Patents

Abstract

PURPOSE:To prevent the error such as over flow of memory, etc., by adding an instruction analyzing means and a storage part information acquiring means to the control part of a numerical controller CNC. CONSTITUTION:At the CNC side, an instruction is received at a receiving part 2 and analyzed by a command analyzing means 9. Then an instruction is given to a storage part information acquiring means 10 to obtain the information on the vacant memory capacity of a storage part 6 if the data show the patterns of DC2, A and DC4. Then the information on the vacant memory capacity is read out of a storage part control means 5 and sent to a transmission data process means 7 with an instruction of the means 9. The means 7 creates an answer command an sends it to a main computer via a transmission part 8. At the main computer, such errors as over flow of memory, etc., can be prevented for a CNC because the information on the part 6 like the vacant memory capacity of the CNC, etc., are previously obtained. As a result, such after-processes can be omitted as the erasure and the retransmission of a working program of the CNC, etc., after occurrence of an error. As a result, the transfer efficiency of the main computer is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a CNC that transfers data such as programs to a host computer.

[Conventional technology]

FIG. 3 is a block diagram of a conventional CNC, and corresponds to the receiving side in FIG. 4. In FIG. 2, (1) is the CNC main body. The CNC main body (1) includes a control section (3) including a central processing unit, a storage section (6) for registering files such as machining programs, a reception section (2) for receiving data sent from the host computer, and a control section. It consists of a transmitter (8) that transmits the data prepared by the transmit data processing means (7) of (3) to the host computer. Control N(
3) sends the data received by the receiving unit (2) to JSQ-AS
Received data processing means (4) that performs processing such as CII conversion
and the storage section (6) to manage the goo information and the storage section (6).
6) storage management means (5) for writing and reading data; and transmission data processing means (5) for converting the data read from the storage management means (5) into a form that can be transferred, such as converting it into an ASC11 hood. 7).

In the conventional numerical control device configured as described above,
The data received from the host computer is stored in the storage unit (6).
This section explains the operation when registering.

FIG. 4 is a flowchart showing the process of transferring data such as machining programs between a conventional host computer and a CNC. First, the CNC side performs initial processing for data transfer, such as initial settings of the receiving section (2) and the transmitting section (8) (25).The host computer side also performs initial processing in the same way (20). Next, on the host computer side, data to be transmitted, such as a machining program, is read and the data to be transmitted is prepared (21). The prepared transmission data is then transmitted to the CNC (22). On the CNC side, the receiving section (2) receives data transmitted from the host computer, the received data processing section (4) performs processing such as 15Q-ASCII conversion, and the data is sent to the storage section management section (5). ) is registered in the storage unit (6) (
26). Next, the host computer side checks whether all the data to be sent has been sent23), and if there is any remaining data to be sent, repeats steps (21), (22), and (23). Termination processing such as termination settings for the communication device is performed and the transmission processing is terminated (24). The CNC side checks whether the final data has been received from the host computer (2g), and if the final data has not been received, repeat steps (26) and (27). Transmitter (
Perform the termination process such as the termination setting in 8), and finish the reception (2).
8).

[Problem to be solved by the invention]

Since the conventional CNC machine is configured as described above,
When transferring data such as machining programs from the host computer to the CNC, the host computer cannot obtain the information in the CNC's memory, so errors such as memory capacity overflow may occur after the host computer starts transmitting the machining program to the CNC. , successfully executed the machining program C
There were problems such as sometimes not being able to send data to the NC.

This invention was made in order to solve the above-mentioned problems, and by communicating the information in the storage section of the CNC between the host computer and the CNC in advance, the host computer can read the information in the storage section of the CNC. Therefore, it is an object of the present invention to provide a numerical control device that can prevent errors such as storage capacity overflow.

Means for Solving Section 0 Communication] The numerical control device according to the present invention is capable of notifying the host computer of the information in the storage unit of the CNC when receiving a command for requesting information on the storage unit of the CNC from the host computer. The control unit (3a) is characterized by being equipped with a command analysis means (8) for detecting this command and a storage section tnn acquisition means 9) for reading out information from the storage section of the CNC.

[Effect]

The numerical control device of the present invention is capable of notifying the host computer of the information in the CNC storage section, so that the host computer side can obtain information on the CNC storage section such as the free storage capacity of the CNC in advance. , it is possible to prevent an error such as the CNC from exceeding its storage capacity by transmitting a machining program whose size is larger than the free storage capacity of the CNC to the CNC. Furthermore, since there is no need for the host computer to delete the machining program registered in the CNC after the memory capacity has been exceeded and to send the machining program again to the CNC, the efficiency of data transfer between the host computer and the host computer can be improved. .

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1), (2), (4) to (8) are exactly the same as the conventional example shown in FIG. FIG. 1 shows a command analysis means (9) for analyzing commands from a host computer, and a storage information acquisition means (6) for reading out information from the storage section (6) in response to instructions from the command analysis means (9). 10) and a control section (3a) including a command analysis means (9) and a storage information acquisition means (10).

FIG. 2 is a flowchart showing the operation of the present invention. First, the CNC side performs initial processing for data transfer, such as initial settings of the receiving section (2) and the transmitting section (8).
5). The host computer side also performs initial processing (
20). Next, on the host computer side, 2, for example, CN
To obtain information on the free storage capacity of C, use D C2 (ASC
I I code 1211), A (ASCII code 41H), D C4 (ASCII code 1411)
29). On the CNC side, this command is sent to the receiving section (
After receiving the data in step 2) (32), the command analysis means (9) analyzes the received data and the analyzed data is sent to DC2A D.
If it is pattern C4, the storage section information acquisition means (1o) is instructed to obtain information on the free storage capacity of the storage section (6). The storage information acquisition means (10) includes a command analysis means (
9) reads out information on free storage capacity from the storage management means (5) and passes it to the transmission data processing means (7) (33). The transmission data processing means (7) converts the data received from the storage information acquisition means (10) into, for example, DC2 (AS
CII code +211), l (ASCII code 318), 0 (ASCII code 3011), 0
A 1-response command such as 00 DC4 (ASCII code 1411), which means free storage capacity is 10,000 bytes, is created and sent to the host computer through the transmitter (8) (34). The host computer is CN
After receiving the reply command from C (30), it is determined whether the size of the machining program to be sent to the CNC is smaller than the free storage capacity of the CNC (31).
), if it is larger, the same termination process as in the prior art is performed and the transmission process is terminated (24). If it is large, then (21), (22),
The operation is similar to (23) and (24). On the other hand, regarding the reception of the machining program on the CNC side, steps (26) and (27) in the flowchart of the prior art shown in FIG.
The operation is similar to (2g).

In the above embodiment, the information in the CNC storage section is explained as an empty storage section, and the error is explained as the storage capacity exceeded, but the information in the CNC storage section is explained as the number of remaining registrations, and the error is explained as the number of registrations exceeded. However, the same effect as in the above embodiment can be achieved.

Further, in the above embodiment, the storage unit information request command is
C2A DC4, Answer:! 77F and rDc21G00
Although the GDC4 format has been described, other formats may also be used (the same effect as in the above embodiment will be achieved).

〔Effect of the invention〕

As described above, according to the present invention, the CNC control section (3
), a command analysis means (8) and a storage information acquisition means (
9), the host combination Niichiyo has prepared the following in advance.
It is possible to obtain information on the storage unit such as the free storage capacity of the CNC, and it is possible to prevent errors such as overshooting of the storage capacity of the CNC. In addition, by avoiding errors, it is possible to perform post-processing such as erasing the CNC machining program and retransmitting the machining program after an error occurs, which has the effect of improving the efficiency of data transfer between the host computer. .

[Brief explanation of drawings]

FIG. 1 is a block diagram of a CNC in an embodiment of the present invention, FIG. 2 is a flowchart showing communication operations in an embodiment of the invention, FIG. 3 is a block diagram of a conventional CNC, and FIG. 4 is a block diagram of a CNC in an embodiment of the present invention. , is a flowchart showing a conventional communication operation. In the figure, (1) is a numerical control device, (5) is a storage unit management means, (6) is a storage unit, (7) is a transmission data processing unit (9) is a command analysis unit, and (10) is storage unit information. It is a means of acquisition. Note that in each figure, the same reference numerals indicate the same or corresponding parts. No. lrj! J

Claims (1)

[Claims] When transmitting a machining program from a host computer to a numerical control device (hereinafter referred to as CNC), the CNC
A numerical control device characterized by being able to notify a host computer of information in a storage section of an NC and to perform data transfer.