JPS6318402A - Interface device for numerical control system - Google Patents

Abstract

PURPOSE:To easily control an external apparatus, by providing an interface device between an NC main body which performs numerical control on the apparatus to be controlled of machine tools, etc., and a host computer which stores NC data and detecting a specific code in the NC data with the interface device. CONSTITUTION:An interface device 4 for transferring NC data is connected between an NC main body 2 which numerically controls an apparatus 1 to be controlled of machine tools, etc., and a host computer 3 which is provided with a built-in memory for storing NC data. A function which detects a specific code contained in the NC data when the NC data are transferred is given to the interface device 4 and, at the same time, a controller 6 which inputs-outputs NC data corresponding to the specific codes of external apparatuses 5a and 5b related to the apparatus 1 is provided in advance. By using the interface device 4 constituted in such way, the computer 3 is requested to supply the NC data and thus obtained NC data are supplied to the NC main body 2. Simultaneously, the NC data are supplied to the external apparatuses 5a and 5b as control signals.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an inter-fnis device for data transfer in a numerical control system that numerically controls controlled equipment such as a machine tool, and in particular, The present invention relates to an interfunice device for a numerical control system that is capable of controlling external devices related to controlled devices.

(Prior Art) As a numerical control system for numerically controlling a controlled servo device such as a machine tool, there is a system in which a numerical control device is combined with a host computer via an interface device for data transfer. With this type of configuration, multiple numerical control devices (hereinafter referred to as rNC bodies) can be centrally managed by one host control device, so it is attracting attention as a means of promoting automation at production sites. .

Data transfer modes via the interface device with the above configuration include real-time processing and badge processing. In real-time processing, constant numerical control data (hereinafter referred to as rNC data) is transferred from the host computer to the memory of the interface device.
Badge processing is a method in which NC data for one machining cycle is transferred from the host computer to the interface device at a time, and after the transfer, the interface device starts transferring data to the NC main body. The interfinis device is configured to transfer data only to the NC main body, and does not control any external equipment such as the pallet exchange device. In this case, the NC main body reads a specific code (external device control code) from the NC data and controls the external device according to this specific code. Furthermore, in real-time processing, the host computer uses its own PIO (parallel input/output) function to control external equipment.

(Problems to be solved by the invention) In this way, in the past, when controlling external equipment,
The specific code is determined on the NC main body side.

Therefore, a time lag occurs until the device responds to a control signal sent to the external device, and the occurrence of the time lag may cause operational imbalance between the controlled device and the external device. To prevent this, measures such as using codes that are easy to distinguish and considering the code insertion position in the NC data are required, but this requires time and effort in the design method of the NC data.
Not advantageous.

On the other hand, in the case of real-time processing, external devices are controlled by the host computer, which increases the load and requires high-speed processing due to the system configuration, contributing to increased costs.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an interface device for a numerical control system that can control external equipment without using an NC main body or a host computer.

[Structure of the Invention (Means for Solving Problems) The present invention is characterized by taking the following measures in order to solve the above problems and achieve the object. That is, the present invention provides a computer that is inserted between a host computer having a storage means for storing numerical control data and a numerical control device main body that numerically controls controlled equipment such as a machine tool, and that performs numerical control in a predetermined transfer mode. An interface device that mutually controls the transfer of control data, mainly data, includes a detection means for detecting a specific code included in the control data during the transfer operation of the control data, and a detection means for detecting a specific code included in the control data when the detection means detects the specific code. The present invention is configured to include input/output means for inputting/outputting control data corresponding to the specific code to/from an external device related to the control device.

(Function) By taking such measures, the input/output means of the interface device can be inserted into any position of the NC data in order to determine the specific code that controls the external device. Control of external equipment can be entrusted to the interface device during processing, without causing an increase in load.

(Embodiment) An embodiment of the numerical control system according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In FIG. 1, an interface device 4 for transferring NC data is located between an NC main body 2 that numerically controls a controlled device 1 such as a machine tool, and a host computer 3 having a memory for storing NC data. N is connected to this interface device 4 during NC data transfer operation.
Input/output control that detects a specific code included in C data and inputs/outputs NC data corresponding to the specific code of external devices 5a, 5b such as pallet exchange devices related to the controlled device 1 when the specific code is detected. The configuration includes a device 6. In this case, it is assumed that the specific code is generated by setting the parameters.

Next, the operation of this embodiment configured as described above will be explained. That is, the interface device 4 requests NC data from the host computer 3, and the host computer 3 transfers the NC data to the interface device 4 in response to this request. The interface device 4 stores the transferred NC data in its own memory and transfers it to the NC main body 2.
The NC data is distributed to the NC main body 2 in response to the NC data request.

Further, the interface device 4 distributes NC data to the NC main body 2, and detects a specific code using its input/output control device 6. When the specific code is detected, a control signal is outputted to the external devices 5a and 5b via the input/output control device 6. Since this control signal is output using the PIO function, a plurality of (two in the figure) external devices 5a are output at the same time.

5b can be controlled, and individual control can be performed using numerical data following a specific code. For example, by substituting "5" after the specific code, it becomes possible to control only the external device 5a.

FIG. 2 is a block diagram showing the configuration of another embodiment of the present invention, and is an example of a configuration that can be controlled by external signal input. In this example, when a signal for interrupting activation is externally inputted to the input/output control device 6, the interface device 4 performs the above-described operation. Furthermore, when the operation is canceled, it can be executed by inputting a signal for initialization to the input/output control device 6.

As detailed above, by starting up the input/output control device 6 once, the N from the host computer 3 is
It is possible to receive C data and distribute NC data to the NC main body 2, as well as external equipment 5 such as a pallet exchange device.
Controls a and 5b can be executed as a series of operations.

Also, without receiving NC data from the host computer '3, it is possible to perform NC processing using only the NC data already stored in the memory.
It is also possible to repeatedly distribute data to the main body 2.

[Effects of the Invention] As described in detail above, the present invention provides a computer that can be inserted between a host computer having a storage means for storing numerical control data and the main body of a numerical control device that numerically controls controlled equipment such as a machine tool. and a detection means for detecting a specific code included in the control data during the transfer operation of the control data; The apparatus is configured to include input/output means for inputting and outputting control data corresponding to the specific code to an external device related to the controlled device when the specific code is detected.

According to this configuration, in order to determine a specific code for controlling an external device using the input/output means of the interface device, N
C data can be inserted at any position, and the host computer can entrust control of external devices to the input/output means through badge processing, without causing an increase in load. It is possible to provide an interface device for a numerical control system that can execute the following without using an NC main body or a host computer.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the structure of one embodiment of an interface device for a numerical control system according to the present invention, and FIG. 2 is a block diagram showing the structure of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Machine tool, 2...NC main body, 3...Host computer, 4...Interfinis device, 5a, 5
b...external device, 6...input/output control device.

Claims (1)

[Claims] Control that is inserted between a host computer that has a storage means for storing numerical control data and a numerical control device that numerically controls controlled equipment such as machine tools, and that mainly uses numerical control data in a predetermined transfer mode. In an interface device that mutually controls the transfer of data, a detection means detects a specific code included in the control data during the transfer operation of the control data, and when the detection means detects the specific code, an external An interface device for a numerical control system, characterized in that the device is equipped with an input/output means for inputting/outputting control data corresponding to the specific code.