JPS5839308A - Input and output interface of numerical controller - Google Patents

Abstract

PURPOSE:To facilitate wiring operation and to eliminate the influence of an electric noise by using an optical fiber cable for signal transfer between a numerical controller and a machine device. CONSTITUTION:A signal supplied from a machine device 12 to a numerical controller 11 is processed by parallel-serial conversion 25, and the serial signal is converted by an E/O converter 24 into an optical signal, which is passed through an optical fiber 23 and then converted into an electric signal by the O/E converter 22 of the device 11; and the electric signal is converted from serial to parallel and sent to a numerical controller logical part 13. A signal from the device 11 to the device 12, on the other hand, is transmitted to the device 12 through parallel-serial conversion 26 and E/O conversion 27 and via an optical fiber cable 28, and then transmitted to the device 12 through an O/E converter 29 and a serial parallel converter 25. Thus, the optical fiber cables are used between the devices 11 and 12 to reduce the number of cables, and while the wiring operation is facilitated, the SN ratio is improved.

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an input/output interface 7A for receiving signals between a mechanical device such as a machine tool or an industrial machine and a numerical control device (hereinafter referred to as an NC device). be.

Conventionally, this bridge device has been constructed using the system shown in Fig. 1.

In the figure, (b) is an NC device, (2) is a III device controlled by this NC device (b), (2) is a logic section of the No. device (1), and this logic section (2) is a logic section of the No. device (1). )
are connected to the hexagonal receiver group (1) and the output driver group (6). (2) is a connector group of the input receiver group (1), (5) is a switch group consisting of a push button switch and a limit switch, and (4) is this switch group (
In the connector group 5), this connector group (4) and the connector group (2) of the input receiver group (1) are connected by an input cable group (3).

(7) is the connector group of the output driver group (6) above, aO
is the lamp display group or relay coil group, (9) is the connector group for this lamp display group or relay coil 1#, and
:x*? The output cable group (9) and the output driver IP (6) connector group (7) are connected by an output cable group (8).

Next, the operation of the input/output interface of this NC device will be explained. Now, when the pushbutton switch of the switch group (6) provided in the mechanical equipment @@ is pressed, for example the start button, this signal is connected to the input cape group V (3) via the connector group (4). In addition, a group of connectors (2
) 1 - through the input receiver 1 (1) through the NO device aυ
A start signal is input to the logic sections 0 and 1 of the circuit.

At this time, the input receiver group (1) is connected to a voltage level converter or noise filter. A regulator is installed to adjust the voltage level and remove noise.

By the way, the input/output interface of the NC device configured as described above requires many connectors or terminal boards as connector groups, and the connector groups are connected by many cables, so the connection wiring work is difficult. It was complicated and I spent a lot of time on it. moreover,
Cables made of electric wires have the disadvantage of being susceptible to electrical noise.

This invention was made to eliminate the above-mentioned drawbacks of the conventional technology, and by transmitting and receiving signals between the NC device and the mechanical device using an optical fiber cable, wiring work becomes easier. The purpose of this invention is to provide a traffic interface that is not affected by electrical noise.

An embodiment of the present invention will be described below with reference to FIG.

In the figure, (b) is the NC device, (2) is -Kiso Hitomi, (
) is the logic section provided in the above NC device (b), @
With the real-to-parallel converter, the above logic section (to)
It is connected to the. ＠ is an alpha conversion device that has the function of converting an optical signal (light signal) into an electric signal (electrical signal), and is the same as the serial baffle conversion device ＠
It is connected to the. 2) is a parallel-to-serial converter installed in the mechanical device (2), and the Foundation is a converter having the function of converting an electrical signal into an optical signal.
)It is connected to the. Iwa is an optical fiber cable for reception that connects the above-mentioned 0/E converter (Z) and Rutsu converter (2).

(E) is a parallel-to-serial converter connected to the logic section (to), and H is this parallel-to-serial converter (to).
e) K-connected Le 0 conversion device pupil, (to) the above mechanical device @
(B) is the 9 serial-parallel converter installed, 4 is our converter connected to this serial-parallel converter al@, and (to) is the above Y converter! ! This is an optical fiber group for transmission that connects @ and ■9 conversion device 4.

Next, the operation of this inventive device will be explained.

There are over 100 types of signals input from the 1411 device (2) to the NC device (b), such as start signals and stop signals, but these are randomly input to the parallel-to-serial converter (c) as parallel signals. The signal is then converted into a time-divided serial V signal. Next, this electric F
The IJA V signal enters the Y converter (→) and is converted from an electrical signal to an optical serial V signal, and then passes through the receiving optical fiber cape v'4 to the ■9 converter () of the NC device (b). 2), where the optical serial signal is converted into an electrical serial signal.

This electrical yy signal enters the V real parallel converter and is converted from a serial signal back into a parallel signal.
The logic section cLIvC of the C device is electrically connected.

On the other hand, the signals output from the NC device (b) to the mechanical device (2) include tool change signals, cutting oil start signals, etc.
Although there are more than one type of signals, these signals are randomly input as parallel signals to the parallel-to-serial converter it (to) of the NC device (b), and are converted into time-divided electrical serial signals. Next, this electrical serial V signal enters the converter (A), where it is converted from an electrical signal to an optical serial signal, and is further transferred to the optical fiber cape A of the transmission signal.
It enters the α conversion device 4 of the mechanical device (2) through /@.

Here, the optical serial signal is converted into an electrical serial signal. This electrical serial signal then enters an analog-to-parallel converter (to) where it is converted from a serial signal back to a parallel signal and connected to each part of the mechanical device (2) via VIM.

In the above embodiments, each transmission and reception was explained using one optical fiber cable, but the transmission and reception may be performed using a plurality of optical fiber cables.
Even if input/output to/from the NC device is performed via an operation pendant for operating the mechanical device, the same effects as in the above embodiment can be obtained.

As described above, this invention uses optical fiber cables to transmit and receive signals between the NCVi@ and mechanical devices, so the number of cables can be extremely reduced, making wiring work easier and more efficient. This has the effect of increasing the W noise performance.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional input/output interface of an NC device, and FIG. 2 is a block diagram showing an input/output interface according to an embodiment of the present invention. In the figures, the same reference numerals indicate the same or equivalent parts, (
(b) is the NC device, (a) is the mechanical device, (to) is the logic section, @co is the Syrian Shibarare M conversion equipment, (sub) (g)
is α9 conversion device, @CA is optical fiber cape V%C'4
n is a parallel converter, and (to) is a parallel to serial converter. Figure 1

Claims (1)

[Claims] In the input/output interface 7A, which exchanges signals between a numerical control device and a mechanical device controlled by this numerical control device, this input/output interface receives electrical parallel signals that are randomly input. A parallel-to-serial converter that converts the electrical signal into an optical signal, a Y converter that is connected to the converter, and an OA converter that converts the optical signal into an electrical signal. a serial V-variable converter that converts the electrical serial signal that has been converted by the parallel converter into a parallel signal; and an optical fiber cable that connects the parallel converter and the QJ converter. An input/output interface interface for a numerical device.