JPH0540516A - Nc equipment communication system and nc equipment - Google Patents

Abstract

PURPOSE:To reduce wiring, to increase data capacity capable of being handled at a time, to easily extend an NC equipment and to attain the reduction in cost by forming a ring-form network. CONSTITUTION:Plural communication means 3 equipped with communication connectors 4, 5 for input/output and a connecting connector 6 for connecting to a sequencer or the NC equipment 2 are provided, and the communication means 3 are connected to respective NC equipments 2 and respective sequencers through the connecting connector 6, and simultaneously, they are connected to each other so as to form the ring-form network by connecting between the communication connectors 4, 5 for input/output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC device communication system and an NC device.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 10, when a plurality of NC devices 2a, 2b and 2c are controlled by one sequencer 1, the sequencer 1 includes parallel I / O units 51a corresponding to the number of NC devices. , 51b, 51c are connected, and these NC devices 2a, 2b, 2c are connected to parallel I
It has the / O connectors 50a, 50b, 50c. In each parallel I / O unit 51a, 51b, 51c,
One end of each of the communication cables 52a, 52b, 52c is connected, and the communication cables 52a, 52b, 52c are connected.
The parallel I / O connectors 50a, 50b, 50c of the NC devices 2a, 2b, 2c are connected to the other ends of the two.

When the sequencer 1 tries to control the NC device 50b, the sequencer 1 first determines the NC device 50b.
The parallel I / O unit 51b connected to b is selected and brought into a communicable state. The other parallel I / O units 51a and 51c are set in a communication disabled state. Then, the sequencer 1 sends a signal to the parallel I / O unit 51b, and the parallel I / O unit 51b receives the communication cable 5
The signal is output to the NC device 2b via 2b. Also, when a signal is sent from the NC device 2b to the sequencer 1, the signal is also sent via the parallel I / O unit 51b. When selecting another NC device, the parallel I / O unit connected to that NC device is selected.

If a new NC device 2d is to be added, the parallel I / O unit 51d is added to the sequencer 1.
Is newly connected to the parallel I / O unit 51d
It is necessary to connect the parallel I / O connector 50d of the NC device 51d with the communication cable 52d.

[0005]

As described above, conventionally, since the same number of parallel I / O units as the NC device are used, the number of wirings increases, the data capacity that can be handled at one time is small, and the NC device There is a problem that the expansion is difficult and the cost is high.

In consideration of the above problems of the conventional NC device communication system, the present invention forms a ring-shaped network to reduce wiring, increase the data capacity that can be handled at one time, and increase the number of NC devices. It is an object of the present invention to provide an NC device communication system that is easy to perform and is low in cost.

[0007]

The present invention is provided with a plurality of communication means having a communication connector for input / output and a connection connector for connecting to a sequencer or an NC device, and the communication means includes each NC device and sequencer. In addition, the NC device communication system is connected to each other via connection connectors, and is also connected to form a ring-shaped network by connecting between the input / output communication connectors.

[0008]

In the present invention, the sequencer and the NC device communicate with each other through the ring-shaped network so that one sequencer controls a plurality of NC devices.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic block diagram of an NC device and communication means of an NC device communication system according to the present invention. That is, a board that is unitized for each function is attached to the NC device 2, and one of them is provided with the main unit 20, which can be said to be the center of the NC device. The main unit 20 is provided with a CPU 21 for controlling,
A bus 22 serving as a path for various signals is connected to the CPU 21. A memory 24 for storing various data, a peripheral circuit 23 necessary for the operation of the NC device, and the like are connected to the bus 22, and a bus connector 7 for connecting an expansion unit and the like is also connected.

The communication means 3 is provided with an input communication connector 4 and an output communication connector 5 for performing data communication, and a connection connector 6 for connecting to the bus connector 7 of the main unit 20. ing. The input communication connector 4 and the output communication connector 5 are connected to a network interface 11, and the network interface 11 is connected to a communication circuit 13. The communication circuit 13 is connected to the bus interface 12, and the bus interface 12 is connected to the connector 6. The connector 6 is connected to the bus connector 7.

As shown in FIGS. 2 and 3, the connection between the NC device 2 and the communication means 3 is as shown in FIGS.
20b are connected by the respective bus connectors 7 and joined by fixing screws 203. The communication means 3 has its connection connector 6 connected to another bus connector 7 of the board 20a of the main unit 20, and is joined to the board 20a of the main unit 20 by a fixing screw 203. The integrated main unit 20 and communication means 3 are attached to the backboard 202. Backboard 2
A casing 201 for covering the communication unit 3 and the main unit 20 is attached to the communication port 02 so that the communication connectors 4 and 5 are exposed to the outside.

Further, as shown in FIG. 4, a communication means 3d as shown in FIG. 2 is connected to the sequencer 1 for controlling the plurality of NC devices 2a, 2b, 2c.
The output communication connector 5d of the communication means 3d is connected to the input communication connector 4a of the NC device 2a by a communication cable 101. The output connector 5a of the NC device 2a is connected to the NC device 2b by the communication cable 102.
Is connected to the input communication connector 4b. The output connector 5b of the NC device 2b is connected to the input communication connector 4c of the NC device 2c by a communication cable 103. The output connector 5c of the NC device 2c is connected to the input communication connector 4d of the sequencer 1 by the communication cable 104. The sequencer 1 and the NC devices 2a, 2b and 2c connected as described above are formed in a ring network.

Further, as shown in FIG. 5, the sequencer 1 is provided with a common register 31 divided in advance into N having a capacity assuming the maximum number N of NC devices. The divided N pieces are numbered so as not to overlap,
Registers 32a, 32b, 32n for transmitting / receiving data to / from the NC devices 2a, 2b, 2n corresponding to the numbers.
Is provided. These NC devices 2a, 2b and 2n form slave stations with station numbers 1 to N for the sequencer 1.

Next, the operation of the above embodiment will be described.
FIG. 6 shows a case where there are N NC devices, but N is 3 in this example. The NC devices 2a, 2b, 2c have registers 32a, 32b, 32c for exchanging data. The sequencer 1 uses the registers 32a, 3
It has a common register 31 divided so as to correspond to 2b and 32c. The sequencer 1 uses each NC device 2a, 2
When sending data to b and 2c, since they are connected in a ring shape as shown in FIG. 4, the data sequentially pass from the sequencer 1 to the NC device 2a, the NC device 2b, and the NC device 2c as shown in FIG. .. Further, as shown in the lower diagram of FIG. 6, the data format for communication is composed of a station number for recognizing a slave station and necessary data.

Here, the numbers of the registers 32a, 32b, and 32c are 1, 2, and 3, and the common register 3 of the sequencer 1 is used.
Necessary data of each NC device 2a, 2b, 2c is written in positions 1, 2, 3 of 1. When the sequencer 1 transmits the data of the common register 31, the data of the number 1 is N
Arrives at the C device 2a. Since the NC device 2a has the same station number, the data is stored in the register 32a. Next, the data of number 2 arrives, and then the data of number 3 arrives, but since the station numbers do not match, those data pass. The data passed through the NC device 2a is number 2 first.
Data arrives at the NC device 2b. Since this data matches the station number, it is stored in the register 32b. Then, the data of number 3 arrives, but since the station numbers do not match, the data passes through the NC device 2b. The data of number 3 which has passed through the NC device 2b arrives at the NC device 2c. Since the data of number 3 matches the station number of NC device 2c, register 3
2c. This completes one communication.

Next, such a sequencer 1 and NC device 2
For more information on sending and receiving data a, 2b, 2c N
The C device 2a will be described as an example of a slave station.

As shown in FIG. 7A, when transmitting data from the sequencer 1 to the slave station 2a, the sequencer 1 writes the address data in the register number 1 of the common register 31 and transmits it to the slave station 2a. The slave station 2a confirms that the station numbers match, stores the address data in the register 32a of the slave station 2a, and transmits a signal notifying that the address data has been received to the sequencer 1. When the sequencer 1 confirms that the slave station 2a has received the address data, the sequencer 1 writes a data transmission command in the register number 1 of the common register 31 and transmits it to the slave station 2a. The slave station 2a confirms that the station numbers match, stores the data transmission command in the register 32a, and transmits a signal notifying that the data transmission command has been received to the sequencer 1. When the sequencer 1 confirms that the slave station 2a has received the data transmission command, the sequencer 1 writes the data to be transmitted in the register number 1 of the common register 31 and transmits it to the slave station 2a. The slave station 2a confirms that the station numbers match, stores the data in the register 32a, and sends a signal to the sequencer 1 notifying that the data has been received. Sequencer 1 is a slave station 2a
When it confirms that the data has been received, the data transmission ends.

On the contrary, when transmitting data from the slave station 2a to the sequencer 1, the sequencer 1 writes the address data into the register number 1 of the common register 31 as shown in FIG. Send. The slave station 2a confirms that the station numbers match, and sends the address data to the slave station 2a.
In the register 32a, and sends a signal notifying that the address data has been received to the sequencer 1. When the sequencer 1 confirms that the slave station 2a has received the address data, the sequencer 1 writes a data request command in the register 1 of the common register 31 and transmits it to the slave station 2a. The slave station 2a confirms that the station numbers match, stores the data request command in the register 32a, and decodes it. The slave station 2a, which recognizes the data request command, writes the data to be transmitted in the register 32a and transmits it to the sequencer 1.
The sequencer 1 receives the data transmitted from the slave station 2a, stores the data in the register number 1 of the common register 31, and ends the communication.

Although the communication means 3 of the above embodiment is connected to the bus connector 7 of the main unit 20 of the NC device 2, an I / O connector 33 is provided instead of the connection connector 6 as shown in FIG. The link adapter 30 is shown in FIG.
As shown in FIG. 3, a parallel I / O connector 37 conventionally provided in the NC device 2 may be used to connect to it, and the communication connectors may be connected to form a network.

Further, in the above embodiment, the communication connector is divided into two, the input communication connector 4 and the output communication connector 5. However, by dividing the input and output communication by a time division method or the like, one connector is provided. It may be shared by the communication connector of.

[0022]

As is apparent from the above description, according to the present invention, since the sequencer and the plurality of NC devices form a ring-shaped network for data communication, the wiring can be reduced and the data capacity that can be handled at one time. More, NC
It has the advantage that equipment can be easily added and the cost is reduced.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an NC device and a communication unit according to an embodiment of the present invention.

FIG. 2 is a schematic side view of the connection between the NC device and the communication means of the embodiment.

FIG. 3 is a schematic assembly view of the connection between the NC device and the communication means of the embodiment.

FIG. 4 is a schematic connection diagram of the embodiment.

FIG. 5 is an image diagram of a register of the embodiment.

FIG. 6 is a schematic block diagram of a register of the embodiment.

7A and 7B are diagrams showing a communication procedure of the embodiment.

FIG. 8 is a schematic block diagram of communication means according to another embodiment.

FIG. 9 is a schematic perspective view of another embodiment.

FIG. 10 is a conventional schematic connection diagram.

[Explanation of symbols]

 1 Sequencer 2 NC device 3 Communication means 4 Communication connector for input 5 Communication connector for output 6 Connection connector

Claims (4)

[Claims] 1. A sequencer and an N controlled by the sequencer.
In an NC device communication system including a C device, a plurality of communication means having an input / output communication connector and a connection connector for connecting to the sequencer or the NC device are provided, and the communication means includes each of the NCs. The device and the sequencer are connected to each other via the connection connector, and by connecting the input / output communication connectors, they are connected to each other so as to form a ring-shaped network. NC device communication system. 2. An NC device comprising communication means having the input / output communication connector according to claim 1 and a connection connector for connecting to the sequencer or the NC device. 3. An NC device comprising a housing capable of accommodating the communication means according to claim 1. 4. An NC device comprising a housing for exclusive use of the communication means according to claim 1.