JPH0248896A - Serial information input and output device for numerical controller and input/output equipment - Google Patents

Abstract

PURPOSE:To reduce the size of constitution by connecting plural input and output devices in parallel with an interface cable and applying serial transmission reception to only a data to a cable selected by a switch circuit for each cable of an NC machine. CONSTITUTION:Plural I/O devices (2-1)-(2-3) are connected in parallel with the NC machine 1 by an interface (I/F) cable and data are sent/received between the machine 1 and the devices (2-1)-(2-3). The switching of analog switches (21-1)-(21-3) for driver/receiver for each I/F cable is controlled by an NC control circuit 5 and only the selected switch (21-1)-(21-3) is closed and the others are opened and only the selected I/F cable is connected to a serial I/F circuit 6 to attain the transmission reception of the serial data. Thus, the serial data input/output by the I/O devices connected in parallel is applied by one serial I/F circuit.

Description

Detailed Description of the Invention [Industrial Field of Application] This invention relates to a serial information input device for numerical control devices and input/output devices that transmits and receives information between a numerical control device and external input/output devices using a serial transfer method. The present invention relates to an output device, particularly a serial information input/output device for numerical control devices and input/output devices that can connect a plurality of external input/output devices in series or parallel.

[Prior Art] Fig. 5 is a connection configuration diagram between a conventional numerical control device (hereinafter referred to as an NC device) and an external input/output device (hereinafter referred to as an I10 device), and in the figure (IA) is an NC device, (2 ) is 1
10 devices, (3) is an interface cable (hereinafter 1)
/F cable), (4) is a serial I/F connector.

FIG. 6 is a signal connection diagram in a conventional NC device.
) and (4) are the same as in FIG. (5 people) is the NC control circuit, (6) is the serial I/F circuit, (7)
, (9), (11) are drivers for the output signals SD, RS, and ER sent from the NC device (IA) to the 110 device (2) via the serial I/F connector (4), (8)
.

(1,0) and (12) are receivers for input signals RD, C8, and DR received by the NC device (IA) from the 110 device (2) via the serial I/F connector (4).

FIG. 7 is a connection configuration diagram between a conventional NC device and a handy floppy disk device (hereinafter referred to as an FDD device), and in the figure, (1 person) and (3) are the same as in FIG. 5. (13A) is an FDD device.

FIG. 8 is a signal connection diagram between a conventional FDD device and an NC device, and (IA), (3), and (13^) are the same as in FIG. 7. (14) is the FDD control circuit in the FDD device (13A), (15), (17), (1
9) is a driver for output signals SD, R5, and ER from the FDD device (13A) to the NC device (IA), (1B),
(18) and (20) are from the NC device (LA) to the FDD
It is a receiver for input signals RD, CS, and DR to the device (13A).

5 to 8 will be explained. NC device (IA) and 11
0 device (2) (e.g. tape reader, tape puncher, etc.) or FDD device (13A), a serial transfer method is generally used, especially R8-23.
The 2C method is often adopted.

FIG. 9 is an I/F cable connection diagram showing signal names and cable connection methods in the R3-232C system.

Common configuration signals include SD (transfer data), RD (receive data) for data, R8 (request to send), CS (clear to send), DR (data set ready), and ER (data terminal ready) for control. and GND (ground) are used.

FIG. 10 is a data transmission time chart on the NC device side. When transmitting data from the NC device (IA) to an external device such as the 110 device (2) or the FDD device (13A), operations are performed in the following order according to the time chart in FIG.

(1) The NC device (IA) outputs an ER double signal O when the power is turned on.
Set it to N.

(II) When the external device is powered on, the DR double signal C8 signal is turned on.

(1 port) The NC device (IA) turns on the R8 signal and starts data transmission if the C8 signal on the NC device side is turned on. The external device writes data or performs various controls based on the received data.

(1v) If the data processing on the external device side is not in time,
By turning off the C5 signal, the NC device (IA) stops sending data within two characters including the data currently being sent.

(V) When the data processing on the external device side is completed and the C8 signal is turned ON, the NC device (LA) transmits the data following the previous data.

(vl) NC device (IA) completes data sending and returns to R3
Turn off the signal.

According to the operation sequences (1) to (vl) above, the external device performs control based on data received from the NC device (IA). If the external device is a tape puncher, the tape puncher is driven based on the received data, and data such as a Niprogram is punched out on the paper tape. In addition, if the external device is an FDD device (13A), based on the received data, various operations such as writing data to the storage medium (floppy disk), initializing the storage medium, or comparing data on the storage medium and received data, etc. Control takes place.

[Problems to be Solved by the Invention] In the conventional serial information input/output device for NC devices and input/output devices as described above, the NC device and the external 110 devices are connected 1 to 11 by I/F cables. Because there are
For example, when connecting another 110 device, one end is
It is a hassle to disconnect the other end of the I/F cable currently connected to the device from the external 110 device and reconnect it to another 110 device.

In addition, the serial I/
If a plurality of F circuits were provided so that a plurality of external 110 devices could be connected to the NC device in parallel, the serial information input/output device would become large-scale, leading to an increase in cost.

This invention was made to solve such problems, and it is possible to connect multiple external 110 devices without reconnecting the I/F cable and with a low-cost circuit configuration.
The purpose of this invention is to obtain a serial information input/output device for C devices and input/output devices.

[Means for Solving the Problems] A serial information input/output device for an NC device according to the first invention is capable of transmitting and receiving information using a serial transfer method with a plurality of external input/output devices connected in parallel to the NC device. In a serial information input/output device for an NC device, a driver is provided corresponding to an information transmission line and a reception line connected to each of the plurality of external input/output devices, and transmits information via the transmission line. and a receiver that receives information via the reception line, and is provided corresponding to each of the plurality of external input/output devices, and the input end of the driver and the output side of the receiver are each connected to one end of the circuit. A plurality of circuit breakers and the other ends of the circuits of the plurality of circuit breakers are connected in parallel for each corresponding terminal of each circuit switch, and serve as the transmission line and reception line as a single external input/output device. , circuit opening/closing corresponding to one external input/output device selected from the serial interface circuit connected in common and a plurality of circuit breakers provided corresponding to each of the plurality of external input/output devices. The device is equipped with a selection controller that performs selective control to close only the circuit of the circuit breaker and open the circuits of the other circuit breakers.

The serial information input/output device for input/output devices according to the second invention is configured to connect one external input/output device out of a plurality of external input/output devices connected in series to the NC device, and transmit information by a serial transfer method. In a serial information input/output device for input/output equipment that sends and receives information, the NC at the stage before its own input/output equipment
A first connector that connects the device or external input/output device to an information transmission line and reception line, and a second connector that connects an information transmission line and reception line to an external input/output device subsequent to the own input/output device. a connector, the first connector and the second connector;
a driver that is provided corresponding to each information transmission line and reception line of the connector, and that transmits information via the transmission line and a receiver that receives information via the reception line; Information is sent and received between the NC device or external input/output device connected by the connector and the own input/output device, or the NC device or external input/output device connected by the first connector and the second a selection switch for selecting whether to send and receive information to and from an external input/output device connected by the connector; and transmission information output from the own input/output device based on a selection signal from the selection switch; or N connected by the first connector by selecting either one of the received information input from the external input/output device connected by the second connector.
A first information selection circuit that sends out to the C device or external input/output device, and also based on a selection signal from the selection switch, receives input from the NC device or external input/output device connected by the first connector. and a second information selection circuit that selects whether the information is to be received by the own input/output device or sent to an external input/output device connected by a second connector.

[Function] In the serial information input/output device for an NC device according to the first invention, the NC device and a plurality of external input/output devices are connected in parallel through I/F cables each including an information transmission line and a reception line. For each r/F cable connected to the plurality of external input/output devices, a driver transmits information via the transmission line, a receiver receives information via the reception line, and the driver and The same number of circuit breakers as the plurality of external input/output devices that open and close the connection circuit from the receiver are provided, and the circuit of the circuit breaker corresponding to one input/output device selected from the plurality of external input/output devices is provided. By closing only one input/output device and connecting it to a single serial I/F circuit, and by opening all the other circuit breakers and disconnecting them, between one selected input/output device and the NC device, It is used to send and receive serial transfer information.

In the serial information input/output device for input/output devices according to the second invention, the NC device and the plurality of external input/output devices are connected in series by T/F cables each including an information transmission line and a reception line. , I that is connected from the NC device at the front and rear stages of its own input/output equipment or external input/output equipment
A driver and receiver that send and receive information via the transmission line and reception line included in the /F cable, and the N
Send and receive information between the C device or external input/output device and its own input/output device, or between its own preceding NC device or external input/output device and its own subsequent external input/output device. By providing a selection switch for selecting whether to transmit and receive information at the select switch, and an information selection circuit for selectively connecting information to be transmitted to the driver and information to be received from the receiver based on a selection signal from the selection switch, the selection Depending on the selection of the switch, either the self-input/output device or the external input/output device downstream of the device sends and receives serial transfer information to and from the NC device or the external input/output device in the previous stage. .

[Embodiment] FIG. 1 is a configuration diagram of an NC device and a plurality of I10 devices showing an embodiment according to the first invention, and in the figure (1)
are NC devices, (2-1), (2-2), (2-
3) are respectively #1. #2. #3110 equipment, (3-1
)(3-2) and (3-3) are respectively #1. #2. #
3 I/F cable, (4-1), (4-2),
(4-3) are #1 and #2, respectively. #3 Serial I/F
It is a connector.

In Figure 1, it is #1. #2. #3I10 equipment (2-1
), (2-2), (2-3) are each individual 1
A configuration is shown in which the device is connected to the NC device (1) in parallel via a /F cable and a serial I/F connector.

FIG. 2 is a signal connection diagram of a serial information input/output device for an NC device showing an embodiment according to the first invention, and (1) and (4-1) to (4-3) are the same as in FIG. They are the same. (5) is an NC control circuit, (6) is a serial I/F circuit, (7-1) to (7-3), (9-1) to (9-3
) (1, 1-1) to (11-3) are from the NC device (1) to #1. #2゜#3 Serial I/F connector (4-1)
, (4-2) and (4-3), respectively #
1. #2. #3110 Output signal SD, R sent to device
3, ER driver, (8-1) to (8-3),
(10-1) to (10-3), (12-1) to (1
2-3) is #1. #2. From the #3110 device to the NC device (1) via the connectors (4-1) to (4-:II)
is a receiver for input signals RD, CS, and DR received by. (21-1) to (21-3) are analog switches (
For example, a product equivalent to Motorola's MC1408B),
When the control signal input to the control terminal (C) is at "H" level, there is a low impedance between the input and output of the switch, and when the control signal is at "L degree" level, there is high impedance between the input and output of the switch. ( 22-1) to (22-3) are N
The analog switch (21-1) is connected to the analog switch (21-1) from the C control circuit (5).
) to (21-3), respectively, I10 device selection signal 5EL
This is a selection line that supplies L, 5EL2, and 5EL3. As described above, serial I/F circuit (6) and #1. #2. #3
110 equipment (2-1), (2-2), (2-3)
means analog switches (21-1), (21-2), <
2l-3) are connected in parallel.

The operation shown in FIG. 2 will be explained. R8-2 in the same figure
The operation sequence of serial communication using the 32C method is the same as that described in the time chart of FIG. 10 above.

First, as the 110 device of the NC device (1), the 91 connected by the #1° serial I/F connector (4-1)
The case where the 110 device (2-1) is selected will be explained. NC control circuit (5) is I10 equipment selection signal 5E
LI is set to "H" level, 5EL2 and 5EL3 are set to 'L2 level, and selection lines (22-1) to (22-3) are set respectively.
Analog switches (21-1) to (21-3) through
supply to Since the control signal input to the control terminal (c) of the analog switch (21-1) is at "H" level, there is a low impedance between the input and output of the switch, and the serial I
The output signals SD, RS, and ER of the /F circuit (6) are a driver (7-1).

(9-1) and (11-1), and the output signal is sent to the 91110 via the serial 1/F connector (4-1).
It is sent to the device (2-1). Also #ll10 equipment (2
Similarly, the input signals RD, CS, and DR from -1) are also connected to the serial 1/F connector (4-1), receiver (8-1),
(10-1).

(Input to serial I/F circuit (6) via 12-IL analog switch (21-1). Analog switches (21-2) and (21-3) are input to control terminal (C) Because the control signal is at "L" level, there is a high impedance between the input and output of the switch, causing #2 and #3■10
Devices (2-2) and (2-3) and serial I/F circuit (
6) is in an open state. Therefore, the serial 1/F circuit (6) is connected to the 91110 device (2-1), and the
Based on the control of the control circuit (5), #ll10 equipment (2-
1) Data is sent and received using a serial transfer method.

Next, when the NC device (1) selects the #2I10 device (2-2), the NC control device (5) changes the I10 device selection signal 5ELL from the 'H' level to the L' level, and sets the I10 device selection signal 5ELL to the 'L' level. level to “H” level, and 5EL3 to “L” level.
Leave the label as it is, and select lines (22-1) to (2) respectively.
Analog switches (21-1) to (2-3)
1-3). Similarly to the above, the serial I/F circuit (8) is connected to the #2110 device (2-2), and is in an open state with the other 110 devices (2-1) and (2-3).

In exactly the same way, NC device (1) is #3110 device (2-3)
When selecting, the I10 device selection signals 5ELL and 5EL2 may be set to "L° level" and 5EL3 may be set to "H" level.

FIG. 3 is a configuration diagram of an NC device, an FDD device, and an external device 110 showing an embodiment according to the second invention, and in the figure (LA) is an NC device and (3-1).

(3-2) is #1. #21/F cable, (4-1),
(4-2) is #1. #2 Serial I/F connector, (
13) is the FDD device, (23) is the external 110 device, (3
5) The NC device (IA) uses the FDD to send and receive information.
A changeover switch for selecting whether to use the device (13) or the external 110 device (23). (36) is the NC device (I
An LED indicating that the party to which information is exchanged with A) is the FDD device (13) (hereinafter referred to as the FDD LED)
, (37) is an LED (
(hereinafter referred to as an external LED).

FIG. 3 shows a configuration in which an external device 110 (23) is connected in series to an NC device (IA) via an FDD device (13).

FIG. 4 is a signal connection diagram of a serial information input/output device for input/output equipment showing an embodiment according to the second invention, (1^
), (3-1), (3-2>, (13),
(23), (35), (36) and (37)
is the same as in Figure 3. Further, (14) is the same as in FIG. (15-1), (17-1).

(19-1) is from the FDD device (13) to the NC device (IA
) output signal SD, R5, ER driver, (1B-
1).

(1,8-1), (20-1) are NC devices (LA)
Input signals RD, C3, DR from to the FDD device (13)
receiver, (15-2), (+7-2), (19-2
) is the driver for the output signals SD, R3, and ER from the FDD device (13) to the external 110 device (23), (1B-2)
, (18-2), (20-2) are input signals RDC from the external 110 device (23) to the FDD device (13)
S, DR receiver, (24) to (29) are AND gates, (30), (31,) are non-inverting drivers, (32)
, (33) is an inverting driver, and (34) is for selecting either the output signal of the FDD control circuit (14) or the input signal from the external 110 device (23) and outputting it to the NC device (1 person). Selector (for example, 5N74LS manufactured by TI)
157 equivalent product).

The operation shown in FIG. 4 will be explained. R3-2 in the same figure
The operation sequence of serial communication using the 32C method is the same as that described in the time chart of FIG. 10 above.

First, the FDD device (
The operation when 13) is selected will be explained. When the changeover switch (35) is operated to close the terminals (a) and (c), the terminal (c) becomes "L" level, and the non-inverting drivers (30), (31) and the inverting driver (32)
) input becomes “L” level, the non-inverting driver (30)
L° level output for FDD (3B
) lights up. The "L" level output of the non-inverting driver (31) is inverted by the inverting driver (33) to become "H" level and is supplied to one input of the AND gates (24) to (26). The result is inputted from the NC device (IA) to the receiver (1B-).

Input signals RD, C via (11g-1, (20-1)
8°DR passes through AND gates (24) to (26) and is supplied to the FDD control circuit (14). Also, the “L” level output direct AND gate (2) of the non-inverting driver (31)
Since input signals RD, C3, and DR are supplied to one input of AND gates (27) to (29),
and is not supplied to the external 110 equipment (23).

Furthermore, since the "L° level output of the non-inverting dry brake 31) is supplied to the SEL terminal of the selector (34), the FDD
Input terminal IA of selector (34) from control circuit (I4)
, 2A, and 3A, respectively.

R5ER is selectively output to its output terminals IY, 2Y, and 3Y, and the drivers (15-1), (17-1), (19-1
) is sent to the NC device (IA). External I10
From the device (23) to the receiver (1B-2), (1g-2)
, (20-2) to the input terminal I of the selector (34)
The signals RD, CS, and DR input to B, 2B, and 3B are deselected by the selector (34). That is, the NC device (I
A) and the FDD control circuit (14) in the FDD device (13)
are combined, and controls such as writing data to a storage medium (floppy disk), initializing the storage medium, or comparing data on the storage medium with received data based on information received from the NC device or IA). It will be done.

Next, the operation when the external 110 device (23) is selected as the 110 device of the NC device (one person) will be described.

Operate the selector switch (35) to connect its terminals (c) and (b)
When is a closed circuit, terminal (C) becomes “H” level,
Non-inverting drivers (30), (31) and inverting drivers (
32) becomes “H” level, the inverting driver (32)
) by the “L” level output of external L E D (37
) lights up. The "H" level output of the non-inverting driver (31) is supplied to one input of the AND gates (27) to (29).As a result, it is input from the NC device (IA) to the receivers (16-'1), ( 18-1).

Input signals RD, C3, and DR via (20-1) pass through AND gates (27) to (29), and further pass through drivers (15-2), (17-2), and (19-2). and sent to the external device 110 (23). In addition, since the "H" level output of the non-inverting driver (31) is inverted by the inverting driver (33) and becomes "L" level, it is supplied to one input of the AND gates (24) to (26), so that the input signal RDCS, DR is AND gate (24) ~ (26
) and is not supplied to the FDD control circuit (14). That is, transfer data and control signals are not output to the FDD control circuit (14). Furthermore, the non-inverting driver (31) “
H” level output is supplied to the SEL terminal of the selector (34), so it is sent from the external device 110 (23) to the receiver (
1B-2).

(18-2), selector (3
4) signals RD input to input terminals IB, 2B, and 3B, respectively.

CS and DR are selectively output to their output terminals IY, 2Y, and 3Y, and the drivers (15-1), (17-1), (
19-1) to the NC device (IA) as signals SD, R3, and ER. On the other hand, the signals SD, R8, and ER input from the FDD device (14) to the selector (34) are deselected by the selector (34). That is, the NC device (one person) and the external I10 device (23) are combined, and the
The external I10 device (23) is driven based on the information received from the C device (IA).

In the embodiment according to the second invention shown in FIG. 3, an example of the FDD device (13) is shown as the external device 110 that is first connected to the NC device (IA), but the present invention is not limited to this. For example, it may be a tape puncher or a tape league.

Although the figure shows an example in which two external 110 devices are connected in series to the NC device (LA), it is also possible in principle to connect three or more external 110 devices.

[Effects of the Invention] As described above, according to the first invention, an NC device and a plurality of external input/output devices are connected in parallel via an I/F cable, and each input/output device has an I/O device. A circuit breaker is provided in the connection circuit with the /F cable, and the 1 selected by the selection signal
Only the circuit of the circuit breaker connected to one input/output device is closed, and all the circuits of the circuit breaker connected to the other input/output devices are opened, so the connection of external input/output devices is When changing, it is only necessary to change the selection signal, and 1/
The effort of changing the connection of the F cable can be omitted, which has the effect of improving operability.

Further, according to the second invention, an NC device and a plurality of external input/output devices are connected in series via an I/F cable and a connector, and the NC device or external input/output device connected to the preceding stage of the NC device or the external input/output device is and one's own input/output device, or between an NC device or external input/output device connected to the previous stage of the self and an external input/output device connected to the next stage of the self. A selection switch for selecting whether to transmit or receive data is provided, and an information selection circuit that selectively connects the transmitted and received information based on the selection signal of the selection switch is provided.
When changing the external input/output device with which the NC device sends and receives information, all you need to do is select the selection switch.■
/F cable connection can be omitted, resulting in improved operability.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an NC device and a plurality of I10 devices showing an embodiment according to the first invention, and FIG. 2 is a serial information input/output device for an NC device showing an embodiment according to the first invention. FIG. 3 is a signal connection diagram showing an embodiment of the second invention, and FIG. Fig. 5 is a signal connection diagram of the serial information input/output device for output equipment, and Fig. 6 is a connection configuration diagram of the conventional NC device and external 110 equipment.
The figure is a signal connection diagram in a conventional NC device, and Figure 7 is a conventional N
The connection configuration diagram between the C device and the FDD device, Figure 8 is the conventional FDD device.
Signal connection diagram between DD device and NC device, Figure 9 is R8-2
I showing signal names and cable connection methods in the 32C system
/F cable connection diagram, FIG. 10 is a data transmission time chart on the NC device side. In the figure, (1), (LA) are NC devices, (2) are I10 devices, (2-1), (2-2), (2-
3) is #1. #2゜83110 device, (3) is I/F cable, (3-1). (3-2) and (3-3) are #1. #2. #31/F cable, (4) is serial I/F connector, (4-1)
, (4-2). (4-3) is #1. #2. #31/F connector, (5)
. (5A) is an NC control circuit, (6) is a serial I/F circuit, (7), (7-1) to (7-3), (9),
(9-1) to (9-3), (11). (11-1) ~ (11-3), (15-1), (
15-2), (17-1), (17-2). (19-1), (19-2) are drivers, (8),
(8-1) to (8-3). (10), (10-1) to (10-3), (1
2), (12-1) to (12-3). (1B-1), (1B-2), (18-1),
(18-2), (20-1), (20-2) are receivers, (13), (13A) are FDD devices, (14
) is the FDD control circuit, (21-'1') to (21-3
) are analog switches, (22-1) to (22-3> are selection lines, (23) are external 110 devices, (24) to (29)
) is andgate, (30). (31) is a non-inverting driver, (32) and (33) are inverting drivers, (34) is a selector, (35) is a switching switch, (3B) is an FDD LED, and (37) is an external LED. be. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Patent Attorney Muneharu Sasaki Diagram + 3A: FDD equipment diagram + 5.17.19 Nidori 8゛16, old, 20 = receiver

Claims (2)

[Claims] (1) In a serial information input/output device for a numerical control device that sends and receives information using a serial transfer method to a plurality of external input/output devices connected in parallel to the numerical control device, a connection is made to each of the plurality of external input/output devices. a driver that transmits information via the transmission line and a receiver that receives information via the reception line, which are provided corresponding to the transmission line and reception line of the information transmitted, respectively; A plurality of circuit breakers are provided corresponding to each device, and the input side of the driver and the output side of the receiver are each connected to one end of the circuit, and the other end of the circuit of the plurality of circuit breakers is connected to each end of the circuit. a serial interface circuit that is connected in parallel to each corresponding terminal of the circuit switch and commonly connected as the transmission line and reception line as a single external input/output device; and each of the plurality of external input/output devices. Selection control that closes only the circuit of the circuit breaker corresponding to one selected external input/output device among the plurality of circuit breakers provided corresponding to the external input/output device, and opens the circuits of the other circuit breakers. What is claimed is: 1. A serial information input/output device for a numerical control device, comprising a selection controller for performing the following steps. (2) In a serial information input/output device for an input/output device that sends and receives information using a serial transfer method with one external input/output device out of a plurality of external input/output devices connected in series with a numerical control device, A first connector for connecting an information transmission line and a receiving line to a numerical control device or an external input/output device at a stage preceding the own input/output device, and a first connector for connecting an information transmission line and a receiving line to an external input/output device at a stage after the own input/output device. a second connector that connects the transmission line and the reception line; and the first connector and the second connector are provided corresponding to the transmission line and reception line of each information, respectively, and are configured to transmit information via the transmission line. and a receiver that receives information via the receiving line, and a numerical control device or external input/output device connected by the first connector and the own input/output device. or a selection switch for selecting whether to transmit and receive information between the numerical control device or external input/output device connected by the first connector and the external input/output device connected by the second connector; Based on a selection signal from the selection switch, select either transmission information output from the own input/output device or reception information input from an external input/output device connected by the second connector. a first information selection circuit that transmits information to a numerical control device or external input/output device connected by a first connector;
Whether the received information input from the numerical control device or external input/output device connected by the second connector is received by the own input/output device, or sent to the external input/output device connected by the second connector. 1. A serial information input/output device for an input/output device, comprising a second information selection circuit for selecting one of the information.