JPH054207U - Numerical control device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to simplify the wiring between the programmable controller and the numerical controller and to increase the number of points that the numerical controller can directly input and output. [Structure] The programmable controller 5 is configured to accommodate an I / O device 6 which can be directly read and written by a numerical controller via a bus cable 4 having address and data lines. [Effect] The wiring between the programmable controller and the numerical control device can be one bus cable, and the number of points that can be directly input / output from the numerical control device can be increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control system such as a production line that combines a numerical controller and a programmable controller.

[0002]

[Prior Art]

 FIG. 2 is a block diagram when the numerical controller and the programmable controller are connected by a bus. In the figure, 1 is a CPU that controls the entire numerical control device, 2 is a 2-port memory that can be accessed from both the numerical control device and the programmable controller, 3 is a bus connector, and 4 is a programmable controller and the numerical control device. Bus cable, 5 is a programmable controller, 6 is an I / O device, and 7 is a connector for external signal input.

Next, the operation will be described. The programmable controller 5 creates information to be transmitted to the numerical control device based on an external signal input via the I / O device 6. These pieces of information are set in the 2-port memory 2 via the bus cable 4 and the bus connector 3, and at the same time, a read request is output to the numerical controller. The numerical controller transfers the information of the programmable controller from the 2-port memory 2 to the external signal memory in response to the read request. Conversely, when the programmable controller needs the information of the numerical controller, it outputs a write request to the numerical controller, and the numerical controller transfers the information from the external output memory to the 2-port memory in response to this write request. , Output a completion signal. The programmable controller reads information from the 2-port memory 2 in response to the completion signal. A signal to be input without passing through the programmable controller is input as an external signal through the external input connector 7. This simplifies the wiring between the programmable controller and the numerical controller and facilitates communication.

[0004]

[Problems to be solved by the device]

 As described above, the communication of the programmable controller is easy, but the signals that can be input when the numerical control device is required must be directly wired to the numerical control device, and the number of input points is also limited.

The present invention has been made to solve the above problems, and an object thereof is to obtain a numerical controller capable of further simplifying wiring and increasing the number of I / O points.

[0006]

[Means for Solving the Problems]

 A numerical controller according to the present invention connects a programmable controller and a numerical controller with a bus to transmit / receive information of the programmable controller, and stores an I / O device which can be directly read and written by the numerical controller in the programmable controller. This allows the numerical controller to read the external input signal directly.

[0007]

[Action]

 The programmable controller contains an I / O device that can be directly read and written by the numerical controller without going through the programmable controller, and the address and data line of the numerical controller can be connected to the bus cable connecting the programmable controller and the numerical controller. By including it, the wiring can be further simplified and the number of points that can be directly input / output by the numerical control device can be increased.

[0008]

【Example】

 Example 1. FIG. 1 is a block diagram showing an embodiment of the present invention, 1 is a CPU for controlling a numerical controller, 2 is a 2-port memory accessible from both the numerical controller and a programmable controller, 3 is a bus connector, Reference numeral 4 is a bus cable for connecting the programmable controller and the numerical controller, 5 is a programmable controller, and 6 is an I / O device.

Next, the operation will be described. The programmable controller 5 creates information to be transmitted to the numerical controller based on an external signal input via the I / O device 6. These pieces of information are set in the 2-port memory 2 via the bus cable 4 and the bus connector 3, and at the same time, a reading request is output to the numerical controller. The numerical controller transfers the information of the programmable controller from the 2-port memory to the external signal memory in response to the read request. On the contrary, when the programmable controller needs the information of the numerical controller, it outputs a write request to the numerical controller, and the numerical controller transfers the information from the external output memory to the 2-port memory in response to the write request. And outputs a completion signal. The programmable controller reads information from the 2-port memory in response to this completion signal. A signal to be input without passing through the programmable controller is directly input from the I / O device housed in the programmable controller in response to an address signal from the CPU of the numerical control device. The I / O device is mounted in the programmable controller, but is independent in the circuit, and is connected to the numerical control device via a bus cable. An address decoder, an input / output I / F, and an external signal connector are mounted in the I / O device. For the signal input from the outside, the address signal and the read signal from the numerical controller are analyzed by the decoder, the corresponding input I / F is selected, and the external input signal is placed on the data line. For signal output to the outside, the address signal and the write signal from the numerical controller are analyzed by the decoder, the output I / F is selected, and the signal on the data line is output to the outside. As a result, data can be transmitted and received between the programmable controller and the numerical controller with one bus cable, and wiring can be simplified by concentrating the external input / output signals to the programmable controller.

[0010]

[Effect of the device]

 As described above, by storing the I / O device that can directly input / output from the numerical controller in the programmable controller and including the address and data line of the numerical controller in the bus cable, the programmable controller and the numerical controller can be connected. Wiring can be performed with one bus cable, and the number of points that can be directly input / output from the numerical control device can be increased.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional control device.

[Explanation of symbols]

 1 CPU of numerical control device 2 2 port memory 3 bus connector 4 bus cable 5 programmable controller 6 I / O device

Claims (1)

[Claims for utility model registration] [Claim 1] A programmable controller and a numerical control device are connected by a bus to transmit and receive information, and the programmable controller has an I / O device that can be directly read and written by the numerical control device. Numerical control device characterized by.