JPH0566707U - I / O controller - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the control for displaying the input / output status,
Reduce the time to display. [Structure] The program control device includes an input circuit 1
5, the output circuit 16, the microcomputer 18, the input / output state display LED circuits 26 and 27, the input wiring 13c, and the output wiring 13d. Microcomputer 1
Reference numeral 8 is for generating a control signal based on an input signal and a control program input in advance. The input / output state display LED circuits 26 and 27 are for displaying the states of the input signal and the control signal. The input wiring 13c is
Input signal from the input circuit 15 to the microcomputer 18
And the input state display LED circuit 26. The output wiring 13d is used to output a control signal from the microcomputer 18 to the output circuit 16 and the output state display LED 27.
Is to be transferred to.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an input / output control device, and more particularly to an input / output control device having a status display means for displaying the status of an input signal and a control signal.

[0002]

[Prior art and its problems]

 A programmable control device, which is an example of an input / output control device, generally stores various commands arbitrarily programmed by a user and controls various external devices according to the contents of the stored program based on an input signal. It is for outputting the control signal to perform. Such a programmable control device is provided with an input / output state display section using an LED or the like for displaying the state of the input signal and the state of the output signal.

Conventionally, this type of input / output state display unit is an LED connected to each terminal of an input unit to which signals of various switches and sensors are input and an output unit from which a control signal from the control unit is output. It consists of In the conventional configuration in which LEDs are connected to the input section and the output section, the internal wiring becomes complicated as the number of terminals increases. Further, there is a problem in that the internal circuit must be different depending on whether the input / output status display section of this kind is not necessary or necessary, which makes it impossible to standardize the manufacturing process.

In order to solve the above-mentioned problems, an input / output state display unit is provided independently, the state of the input unit is displayed via the control unit, and the output unit is output by a control signal output from the control unit. It is known to display the state of. By providing the input / output status display section independently, the input section and the output section can be configured by common wiring regardless of the presence / absence of the input / output status display section, and the parts can be shared.

In the above-described conventional configuration in which the input / output state display section is independently provided, in order to know the state of the input signal, the input signal is once input to the control section and then input from the control section to the input / output state display section. The signal status is output. Therefore, signals are output to the input / output status display section in different processes depending on the input status and the output status. In addition, in the input / output control device in which the input section and the output section are connected to the control section using the serial transmission method, serial transmission must be performed using different addresses for displaying the input status and the output status. I have to. In other words, in the control unit, in order to perform serial communication between the input unit and the output unit and the input / output status display unit, it is necessary to determine the respective addresses and communicate with them in a time division manner. Therefore, another address for the input / output status display section, another control program, and its execution time are required, and the time for display becomes long.

An object of the present invention is to simplify the control for displaying the input / output state and shorten the time until the display.

[0007]

[Means for Solving the Problems]

 The input / output control device according to the present invention comprises input means, output means, arithmetic control means, state display means, input signal transfer means, and control signal transfer means. The input means is for receiving an input signal from the input device. The output means is for outputting a control signal to the output device. The arithmetic control means is for generating a control signal based on an input signal and a control program inputted in advance. The status display means is for displaying the status of the input signal and the control signal. The input signal transfer means transfers an input signal from the input means to the arithmetic control means and the status display means. The control signal transfer means transfers the control signal from the arithmetic control means to the output means and the status display means.

[0008]

[Action]

 In the present invention, when the input signal is taken in from the input device by the input means, the input signal is transferred to the arithmetic control means and the status display means by the input signal transfer means. Then, the status of the input signal is displayed on the status display means. Further, when the input signal is given to the arithmetic control means, the control signal is generated based on the input signal and the control program inputted in advance. The generated control signal is transferred to the output means and the status display means by the control signal transfer means. When the control signal is transferred to the status display means, the status is displayed.

As described above, since the input signal is directly transferred to the status display means without being transferred to the arithmetic control means, the contents of the input signal are transferred to the status display means without performing another control by input / output. Is displayed. Therefore, the input signal can be displayed in a short time with simple control.

[0010]

【Example】

 1 is an external view of a programmable control device which is an input / output control device according to an embodiment of the present invention. In the figure, this device has a case 1 having a substantially rectangular parallelepiped shape. A plurality of input terminals 2 are arranged side by side in the lateral direction on the upper part of the front surface of the case 1. Similarly, a plurality of output terminals 3 are arranged side by side in the lateral direction at the lower part. Further, on the front surface of the case 1, a plurality of input state display LEDs 4 for displaying an input state and a plurality of output state display LEDs 5 for displaying an output state are arranged. These LEDs 4 and 5 are provided as many as the number of terminals corresponding to the input terminal 2 and the output terminal 3, respectively. Further, on the front surface of the case 1, a connector section 6 for connecting a programming console as a program creating device is provided. A mounting flange 7 is provided on the rear side of the case 1 for mounting the device on equipment such as a machine tool.

As shown in FIG. 2, inside the case 1, a display substrate 10 mainly mounted with an LED driver or the like for status display, a control substrate 11 mounted with a CPU, a memory and the like, and an input / output are provided. The input / output board 12 on which the unit is mounted is housed. The substrates 10, 11 and 12 are connected by a 4-bit serial transmission line 13. FIG. 3 is a block configuration diagram of the present apparatus. The input / output board 12 shown in FIG. 2 has an input circuit 15, an output circuit 16, and a gate array 17 connected to each of the input circuit 15 and the output circuit 16. Further, the control board 11 includes a microcomputer 18 including a CPU, a ROM, a RAM, a storage section 22 including an SRAM 19, a ROM 20 and an EEPROM 21, a reset circuit 23, and an oscillation circuit 24 for generating a reference clock signal. And a timer circuit 25 are mounted. Further, on the display substrate 10, an LED circuit 26 for displaying an input state, an LED circuit 27 for displaying an output state, and a gate array 28 connected to each of these LED circuits 26, 27 are mounted. There is.

The input circuit 15 has, for example, 24 input terminals 2, each of which is connected to each gate of the gate array 17. Further, the output circuit 16 has, for example, 16 output terminals 3, of which 14 output terminals 3 are connected to respective gates forming the gate array 17. Six of the plurality of input terminals 2 of the input circuit 15 are also connected to direct input terminals of the microcomputer 18. Two output terminals of the output circuit 16 are directly connected to the direct output terminals of the microcomputer 18. The gate array 17 converts parallel information from the input circuit 15 into serial information and outputs the serial information to the serial transmission line 13, and also converts serial information sent from the microcomputer 18 via the serial transmission line 13 into parallel information. It is then provided to the output circuit 16.

In the control board 11, the storage unit 22, the reset circuit 23, the oscillation circuit 24, and the timer circuit 25 are connected to the microcomputer 18. Further, it is possible to connect an I / O circuit 31 for the programming console 30 and other expansion devices to the microcomputer 18. The microcomputer 18 stores the program data from the programming console 30 in the EEPROM 21, performs serial communication with the gate array 17, stores the input information sent from the gate array 17 in the SRAM 19, Also, it mainly has a function of performing an arithmetic operation by a sequence program showing a processing procedure stored in the EEPROM 21 based on the input information. The ROM 20 stores a system program for controlling the programmable control device itself. The timer circuit 25 is a circuit for adjusting the timer time from the outside, and has a trimmer resistor and a low pass filter.

The input state display LED circuit 26 has the same number of LEDs as the number of input terminals 2 of the input circuit 15. Each LED is connected to each gate forming the gate array 28. The output state display LED circuit 27 has the same number of LEDs as the output terminals 3 of the output circuit 16. Each LED is connected to each gate forming the gate array 28.

FIG. 4 schematically shows the connection relationship among the gate array 17, the microcomputer 18, and the gate array 28. The serial transmission line 13 connects the gate array 17 to the serial port of the microcomputer 18 and the gate array 28, and the wiring 13a for determining the input / output state, the synchronization clock signal (shift signal of the shift register). Wiring 13b for inputting data, input wiring 13c for inputting data, and output wiring 13d for outputting data, a total of 4 (bit) wirings are included. The input wiring 13c connects the gate array 17 and the microcomputer 18 and directly connects the gate array 17 and the gate array 28.

The gate array 17 is composed of a shift register 17 a connected to each input terminal 2 of the input circuit 15 and a shift register 17 b connected to each output terminal of the output circuit 16. Similarly, the gate array 28 also includes a shift register 28a connected to the input state display LED circuit 26 and a shift register 28b connected to the output state display LED circuit 27. On the other hand, the micro computer 18 has a serial communication unit including a shift register 18a and a shift register 18b. The shift register 18a is connected to the shift register 17a of the gate array 17 and the shift register 28a of the gate array 28 via the input wiring 13c. The shift register 18a is connected to the CPU via the reception data buffer.

The shift register 18a is for converting the serial input signal IN 1 transferred through the serial transmission line 13 into a parallel signal. The shift register 18b is connected to the shift register 17b of the gate array 17 and the shift register 28b of the gate array 28 via the output wiring 13d. The shift register 18b is connected to the CPU via the transmission data buffer. The shift register 18b is for converting parallel output signals output from the transmission data buffer into serial output signals OUT. In addition, the input / output state determination signal SI / O and the synchronous clock signal SCK are output from the microcomputer 18 to the wirings 13a and 13b of the serial transmission line 13, respectively. The input / output state determination signal SI / O is used to determine whether the gate arrays 17 and 28 operate the input side shift registers 17a and 28a or the output side shift registers 17b and 28b. Signal. The synchronous clock signal SCK is used as a signal for shifting the shift registers 17a, 17b, 28a, 28b of the gate arrays 17, 28.

Next, a method of using this device will be described. This programmable control device is used when performing sequence control in a machine tool or the like. First, a sequence program for performing sequence control is stored in this device. In this case, the programming console 30 is connected to the connector section 6 of this apparatus. Then, a sequence program is created by the programming console 30, and this sequence program is stored in the EEPROM 21 of this apparatus. Further, various switches such as a push button switch and a limit switch, and a sensor are connected to the input terminal 2 of this device. Then, the output terminal 3 is connected to an electromagnetic clutch, a solenoid, a motor, etc., which are to be controlled.

Next, the control operation will be described with reference to FIG. When the start switch of the machine tool equipped with this device is pressed, this device is also started. Then, in step S1, initial setting is performed. Next, in step S2, it is determined whether or not the programming console 30 of this apparatus is connected. If the programming console 30 is not connected, the process proceeds to step S3. In step S3, it is determined whether a predetermined time has passed since the device was started. Steps S2 and S3 are repeated until a predetermined time has elapsed. When the programming console 30 is connected within the predetermined time, the process proceeds from step S2 to step S4.

In step S4, it is determined whether or not the program mode signal is transmitted from the programming console 30. In step S5, it is determined whether or not the run (RUN) mode signal is transmitted from the programming console 30. When a program is created by the programming console 30 and this program is stored in this device, a programming mode signal is sent from the programming console 30. Upon receipt of this signal, the apparatus shifts from step S4 to step S6. In step S6, the program data (sequence program) sent from the programming console 30 is stored in the EEPROM 21. If the programming console 30 is not connected within a predetermined time after the device is activated, the process proceeds from step S3 to step S7.

In step S7, the data of all the input terminals 2 are read. At this time, the parallel information from the plurality of input terminals is converted into serial information by the gate array 17, sent to the microcomputer 18, and given to the gate array 28. In the microcomputer 18, the serial information input to the serial communication unit is converted into parallel information via the shift register 18a, and this input information is stored in the SRAM 19. Further, in the gate array 28, serial information of the inputted input signal is converted into parallel information via the shift register 28a, and the LED in the input state display LED circuit 26 is controlled to turn on, for example, turned on. Turn on the LED corresponding to the input terminal. At this time, the input signal is directly applied to the input state display LED circuit 27 without passing through the microcomputer 18, so that the execution time for display is shortened.

In step S 8, a sequence program is executed based on the input data fetched in step S 7, and the result is written in SRAM 19. Next, in step S 9, the output data written in the SRAM 19 is output to the shift register 18b. The shift register 18b converts the parallel information from the CPU into serial information and sends it to the gate array 17 and the gate array 28 via the serial transmission line 13. In the gate array 17, the shift register 17b converts serial information into parallel information and outputs the parallel information to each output terminal as a control signal. In the gate array 28, the shift register 28b converts serial information into parallel information, and the LED circuit 27 for output state display controls the lighting of the LEDs. Here, the LED corresponding to the output terminal 2 for outputting a signal is turned on.

In step S10, it is determined whether the programming console 30 is connected during the process. When the programming console 30 is connected, the process proceeds to step S4 and the above-mentioned processing is executed. If the programming console 30 is not connected, the process returns to step S7, and the processes of steps S7 to S10 are repeatedly executed.

In this way, the control signal is output to the controlled object based on the input information according to the contents of the sequence program, and the sequence control is performed. At this time, the input information is immediately input state display LED circuit 26. It is directly transferred to and the input status can be displayed in a short time. In addition, status display can be performed with the same control for input and output. In such a device of this embodiment, the parallel information is converted into serial information and the serial information is converted into parallel information by the gate array 17 mounted on the input / output substrate 12 and the gate array 28 mounted on the display substrate 10. is doing. For this reason, the number of wiring lines connected to the control board 11, the input / output board 12, and the display board 10 is reduced, and the connector can be downsized. Further, even when the number of input terminals and output terminals is changed, it can be dealt with only by changing the input / output board 12 and the display board 10, and without changing the serial transmission line 13.

Further, since a part of the input terminal and the output terminal is directly connected to the microcomputer 18, it is possible to sufficiently cope with a case where high-speed processing such as interruption is required. [Other Embodiments] (a) In the above embodiments, the case where the number of input terminals is 24 and the number of output terminals is 16 has been described as an example, but these numbers are not particularly limited. (B) In the above embodiment, parallel information is converted into serial information and transferred, but the present idea is not limited to the above embodiment. That is, the present invention can be applied to an input / output control device that handles parallel information. (C) In the above embodiments, the programmable control device was described as an example of the input / output control device, but the present invention is not limited to this.

[0026]

[Effect of the device]

 As described above, in the present invention, since the input signal can be transferred from the input means to the operation control means and the status display means by the input signal transfer means, the time required to display the status of the input signal can be shortened. Further, since the input signal and the output signal are input or output and are transferred to the state display means at the same time, the state can be displayed without performing complicated control.

[Brief description of drawings]

FIG. 1 is an external perspective view of a programmable control device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a substrate arrangement of the device.

FIG. 3 is a block configuration diagram of the device.

FIG. 4 is a schematic diagram showing a connection relationship of each substrate of the device.

FIG. 5 is a control flowchart of the device.

[Explanation of symbols]

 2 Input Terminal 3 Output Terminal 13 Serial Transmission Line 15 Input Circuit 16 Output Circuit 17 Gate Array 18 Microcomputer 26 Input State Display LED Circuit 27 Output State Display LED Circuit 28 Gate Array

Claims (1)

[Scope of utility model registration request] 1. The control means based on an input means for receiving an input signal from an input device, an output means for outputting a control signal to an output device, and the input signal and a control program inputted in advance. Arithmetic control means for generating a signal, state display means for displaying the states of the input signal and control signal, and input signal transfer means for transferring the input signal from the input means to the arithmetic control means and state display means An input / output control device comprising: a control signal transfer unit that transfers the control signal from the arithmetic control unit to the output unit and the status display unit.