JPH0546219A - Numeric value controller - Google Patents

Abstract

PURPOSE:To reduce the load of a main PC and to facilitate the structure and maintenance of a system in a numeric value controller incorporating a PC (programmable controller). CONSTITUTION:A numeric value control part 20 controls the whole CNC (numeric value controller) 10. A main PMC (programmable machine controller) 30 is in the bus linkage with the numeric value control part 20, is controlled based on the command of the numeric value control part 20 and a machine 80 is controlled by using a main sequence program. At the main PMC 30, a sub PMC 40 is bus-linked, and seperated from the machine 80 like a robot 90, etc., the individually controllable mechanism part is controlled by a sub-sequence program.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device incorporating a PC, and more particularly to a numerical control device for controlling a machine tool.

[0002]

2. Description of the Related Art Conventionally, a numerical control device has a single PC.
Some have a built-in (programmable controller). However, in recent years, the machine to be controlled has become complicated, and accordingly, the capacity of the sequence program, the processing time, the number of I / O points, etc. have increased. For this reason, it is becoming impossible to cover all machines with only one built-in PC. Therefore, when adding a loader or the like that can be controlled independently of the machine, a general-purpose PC is connected to the outside of the numerical controller via an input / output circuit (I / O unit), The load on the built-in PC is reduced.

[0003]

However, a general-purpose PC usually has a different program system from that of a built-in PC, and especially in the case of another manufacturer's PC, the program system and interface are different. It was difficult to find the cause. Also, a general-purpose PC is an I / O
Since they are connected via a unit, there is a problem that it is difficult to construct and maintain the system, such as address allocation when adding a loader or the like.

The present invention has been made in view of the above circumstances, and simplifies system construction and maintenance by providing a sub-PC that controls a specific mechanism section by an original sequence program. An object is to provide a numerical control device.

Another object of the present invention is to provide a numerical controller capable of adding or changing a machine without adding a printed wiring board for a sub PC.
Still another object of the present invention is to provide a numerical control device that simplifies system construction and maintenance by providing a pre-process PC that performs pre-processing and post-processing of the PC.

[0006]

According to the present invention, in order to solve the above problems, a PC (programmable controller) is used.
In a numerical control device having a built-in controller, a numerical control unit for controlling the numerical control device as a whole, a main PC coupled to the numerical control unit and having a first processor, and a main computer coupled to the main PC, and a second processor According to the present invention, there is provided a numerical controller characterized by having a sub-PC for controlling a specific mechanism section.

Further, in a numerical controller having a built-in PC, a numerical controller for controlling the entire numerical controller, and a first ROM which is coupled to the numerical controller and stores a main sequence program. A second ROM for storing a sub sequence program for controlling a specific mechanism section, a third processor for executing the main sequence program and the sub sequence program, and the second ROM A PC having an I / O control circuit for connecting the specific mechanism section to the
And a numerical controller provided with the following.

Further, in a numerical controller incorporating a PC, a numerical controller for controlling the entire numerical controller,
A main PC which is coupled to the numerical control unit and has a fourth processor, and a fifth processor which is connected in series with the main PC and which performs pre-processing and post-processing of a sequence program executed by the fourth processor. And a pre-process PC having a numerical controller.

[0009]

The sub-PC is the main P having the first processor.
It is coupled to C and controls a specific mechanical unit by the second processor.

The third processor provided in the PC reads and executes the main sequence program and the sub sequence program from the first ROM and the second ROM, respectively.

Further, the fifth processor of the pre-process PC performs pre-processing and post-processing of the sequence program executed by the fourth processor of the main PC.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a numerical controller according to the present invention. Numerical control device (hereinafter referred to as "CNC")
The numerical control unit 20 controls the entire CNC 10.
, A main PMC (programmable machine controller) 30 bus-coupled to the numerical control unit 20, and a sub-PMC 40 bus-coupled to the main PMC 30 to control a specific machine by a unique sequence program.

A CRT / MDI unit 50 and an external device 60 are connected to the numerical controller 20. A machine 80 is connected to the main PMC 30 via an I / O unit 70. Further, the robot 90 is directly connected to the sub PMC 40.

FIG. 2 is a block diagram showing the configuration of the numerical control unit 20. The processor 21 is a central processor for controlling the entire CNC 10, and the RO via the bus 29.
Read the system program stored in M23,
The control of the entire CNC 10 is executed according to this system program.

The shared RAM 22 is a RAM for exchanging data between the numerical control unit 20 and the main PMC 30, and exchanges data with each other via the shared RAM 22. At the same time, it stores the data required for access from both sides.

The RAM 24 stores temporary calculation data, display data and the like. The CMOS 25 is configured as a non-volatile memory and stores a tool correction amount, a pitch error correction amount, a machining program, parameters and the like. CMOS2
5 is backed up by a battery not shown, C
Even if the power of the NC 10 is turned off, the data is retained as it is because it is a non-volatile memory. The CMOS 25 has a main PMC 30 and a sub PM.
Parameters necessary for C40 are also stored.

The graphic control circuit 26 converts digital data such as the current position of each axis, alarms, parameters and image data into an image signal and outputs it. This image signal is sent to the display device 51 of the CRT / MDI unit 50,
It is displayed on the display device 51. Parameters on the main PMC 30 side, ladder diagrams, etc. can also be displayed on the display device 51. The data at this time is the main PMC30.
From the shared RAM 22.

The interface 27 receives data from the keyboard 52 in the CRT / MDI unit 50 and transfers it to the processor 21. Further, data to the main PMC 30 side can also be input from the keyboard 52.

The interface 28 is an interface for an external device, and is connected to an external device 60 such as a paper tape reader, a paper tape puncher, a paper tape reader / puncher, a printer or the like. The processing program is read from the paper tape reader, and the processing program edited in the numerical controller 20 can be output to the paper tape puncher.

In FIG. 2, the axis control circuit for controlling the servo motor and the like, the servo amplifier, the spindle control circuit, the spindle amplifier, the manual pulse generator interface, etc. are omitted.

FIG. 3 is a block diagram showing the structure of the main PMC 30. The main PMC 30 has a processor 31 for PMC, and the processor 31 is connected to the shared RAM 22 by a bus 36.

The ROM 32 is coupled to the bus 36. The ROM 32 stores a management program and a main sequence program for controlling the main PMC 30. The main sequence program is generally written in a ladder language, but may be written in a high level language such as Pascal. Also, instead of the ROM 32, R
An interface for the OM cassette is provided to store the main sequence program in the ROM cassette and
It may be connected to the cassette interface. By doing this, you can easily upgrade the level of the main sequence program or
You can change the program.

Further, a RAM 33 is coupled to the bus 36, an input / output signal is stored in the RAM 33, and its contents are rewritten as the main sequence program is executed.

Further, the shared RAM 35 is connected to the bus 36. The shared RAM 35 is a RAM for exchanging data between the main PMC 30 and the sub PMC 40, and exchanges data with each other via the shared RAM 35. At the same time, it stores the data required for access from both sides.

The I / O control circuit 34 is connected to the bus 36, converts the output signal stored in the RAM 33 into a serial signal and sends it to the I / O unit 70. Also, a serial input signal from the I / O unit 70 is converted into a parallel signal and sent to the bus 36. The signal is stored in the RAM 33 by the processor 31.

The processor 31 receives command signals such as an M function command and a T function command from the numerical controller 20 via the shared RAM 22, stores them in the RAM 33 once, and stores the commands in the R memory.
Processing is performed according to the main sequence program stored in the OM 32, and I / O control circuit 34 is used to perform I / O processing.
Output to the O unit 70. This output signal controls hydraulic equipment, pneumatic equipment, and electromagnetic equipment on the machine 80 side.

Further, the processor 31 is the I / O unit 7
Input signals such as 0 limit switch signals on the machine 80 side and operation switch signals on the machine operation panel from 0 are received via the I / O control circuit 34, and the input signals are temporarily stored in the RAM 33. Input signals that do not need to be processed by the main PMC 30 are sent to the processor 21 via the shared RAM 22. The other signals are processed by the main sequence program, some of the signals are sent to the numerical controller 20 side, and the other signals are output signals, and the I / O control circuit 34
It is output from the O unit 70 to the machine 80 side.

On the other hand, the main sequence program can include instructions for controlling the movement of each axis. When these instructions are read by the processor 31, they are sent to the processor 21 via the shared RAM 22 to control the servo motor. Similarly, the spindle motor and the like can also be controlled by a command from the PMC side.

The main sequence program stored in the ROM 32 and the input / output signals stored in the RAM 33 can be displayed on the display device 51 of the CRT / MDI unit 50.

Further, the main sequence program of the ROM 32 passes through the shared RAM 22 and the bus 29,
It is possible to print out to a printer connected to the interface 28.

Further, it is possible to connect a program creating device to the interface 28, transfer the main sequence program etc. created by the program creating device to the RAM 33, and operate the main PMC 30 with the main sequence program of the RAM 33. ..

FIG. 4 is a block diagram showing the configuration of the sub PMC 40. The sub PMC 40 has a PMC processor 41, and the processor 41 is connected to the shared RAM 35 of the main PMC 30 by a bus 45.

The ROM 42 is coupled to the bus 45. The ROM 42 stores a management program for controlling the sub PMC 40 and a sub sequence program. The sub sequence program is the main PM
Like the C30 main sequence program, it is created in a ladder language, Pascal, or the like.

The RAM 43 is coupled to the bus 45. Input / output signals are stored in the RAM 43, and the contents are rewritten as the sub-sequence program is executed.

The I / O control circuit 44 is connected to the bus 45, converts the output signal stored in the RAM 43 into a serial signal, and sends the serial signal to the robot 90. In addition, the serial input signal from the robot 90 is converted into a parallel signal and the bus 4
Send to 5. The signal is sent to the RAM by the processor 41.
It is stored in 43.

The processor 41 is a processor for controlling a machine that can be controlled independently of the machine 80, and here it is assumed to control the robot 90. Not only the robot but also a laser oscillator, a loader, or a part of the machine 80 may be used. The processor 41 normally performs independent processing in the sub PMC 40, but exchanges signals with the main PMC 30 as necessary. This signal is sent and received by the bus 45 and the shared RAM 35.
Through. Otherwise, the processor 41 supplies an output signal to the I / O control circuit 44 according to the sub sequence program stored in the ROM 42 to control the robot 90.

Further, the processor 41 receives an input signal such as a switch signal for overwork detection from the robot 90, and temporarily stores this input signal in the RAM 43. The input signal is processed by the sub sequence program, and some signals are output to the main PMC 30 side and other signals are output signals to the robot 90 via the I / O control circuit 44.

In this way, the shared RA is assigned to the main PMC 30.
By providing the M35 and connecting the sub PMC 40 via the bus 45, the numerical controller 20 and the main PMC 3 are connected.
The sub PMC 40 can be added without changing the management program of 0. Therefore, the load on the main PMC 30 side can be reduced and the processing time can be shortened.

When adding the sub PMC 40, only the printed wiring board of the sub PMC 40 is added.
System construction is easy. Further, even when the robot 90 becomes a different robot or the loader or the like is controlled in place of the robot 90, only the sub sequence program of the sub PMC 40 needs to be changed, and the main sequence program needs to be changed. Absent. Therefore, system construction and maintenance become easy.

Furthermore, the sub-P does not have to go through the I / O unit.
MC40 can be added, so main PMC3
It is possible to provide the sub PMC 40 having the same program system and interface as the 0 side. Therefore, the cause at the time of failure can be easily found. Further, at this time, address allocation or the like is not required, which facilitates maintenance.

Although the shared RAM 35 is provided between the main PMC 30 and the sub PMC 40 in this embodiment, they may be directly coupled by bus. in this case,
RAM 33 or RAM 43 instead of the shared RAM 35
By using, the same effect as described above can be obtained. In addition to this, HDLC (high-level data link control procedure)
A method may be used. This HDLC system is not restricted by codes by performing transmission in frame units, which is a bit string surrounded by a start flag sequence and a termination flag sequence, and has higher control and higher efficiency transmission than the basic type data transmission control procedure. This is a synchronous transmission control procedure that makes it possible.

Further, like the HDLC system, an SDLC (synchronous data link control procedure) system or the like may be used in which transmission is performed in frame units, which is a bit string surrounded by a start flag sequence and a termination flag sequence.

As a second embodiment, the main PMC
The function of the sub PMC 40 may be included in 30. FIG. 5 is a diagram showing the configuration of the second embodiment. A ROM 32, a RAM 33 and an I / O control circuit 34 are coupled to the processor 31 of the main PMC 30 via a bus 36. A machine 80 is connected to the I / O control circuit 34 via an I / O unit 70. The processor 31 stores the main sequence stored in the ROM 32.
The machine 80 is controlled according to the program. The processor 31 receives an input signal such as a limit switch signal on the machine 80 side and a signal from an operation switch on the machine operation panel, and temporarily stores the input signal in the RAM 33. Also, this RAM3
The output signal to the machine 80 side is also stored in 3.

A ROM 37 and an I / O control circuit 38 are coupled to the bus 36. A robot 90 is connected to the I / O control circuit 38. The ROM 37 stores a sub sequence program for controlling the robot 90. The processor 31 follows the robot 90 according to the sub sequence program in the ROM 37.
To control. An input signal from the robot 90 and an output signal to the robot 90 are stored in the RAM 33.

When controlling the machine 80 and the robot 90, the processor 31 alternately executes the main sequence program and the sub sequence program at regular intervals.

With such a configuration, in the second embodiment, when the robot 90 or the like is added, the ROM 37 and the I / O can be installed without adding a new printed wiring board to the numerical controller.
The robot 90 and the like can be controlled simply by adding the O control circuit 38. Therefore, the system construction becomes easy.

Also in the second embodiment, the robot 9
Even if 0 becomes another robot or a loader, only the sub sequence program needs to be changed, and the main sequence program need not be changed. Therefore, system construction and maintenance become easy.

The robot 90 is not added and the ROM
If it is not necessary to mount 37, the processor 31 may be made to execute only the main sequence program of the ROM 32.

Next, a third embodiment will be described. Figure 6
FIG. 8 is a diagram showing a configuration of a third exemplary embodiment. The CNC 10 is provided with a numerical controller 20 that controls the entire CNC 10 and a main PMC 30 that is bus-connected to the numerical controller 20. Pre-processed PMC for main PMC 30
100 are bus-coupled. The numerical control unit 20 has a C
The RT / MDI unit 50 and the external device 60 are connected.

All the machines 81 to be sequence-controlled are connected to the preprocess PMC 100 via the I / O unit 71. The pre-process PMC100 pre-processes the input signal data from the machine 81 and performs the main PM.
Send to C30. The main PMC 30 processes this pre-processed input signal with a sequence program and sends it to the numerical controller 20 or as a pre-process P as an output signal.
Send to MC100. The pre-process PMC100 post-processes the output signal from the main PMC30 and sends it to the machine 81 side.

FIG. 7 is a diagram showing the structure of the preprocess PMC100. A ROM 102, a RAM 103, and an I / O control circuit 104 are coupled to the processor 101 via a bus 105. Here, the processor 101 is an MPU (micro processor unit). In addition to these, DSP (digital signal processor), PLA (programmable logic
It is also possible to use a processor for high-speed arithmetic processing such as an array) or RISC (reduced instruction set computer).

The ROM 102 stores a management program and a pre-process sequence program for performing pre-processing and post-processing of the main sequence program executed by the main PMC 30. RAM1
Input / output signals are stored in 03, and the contents are rewritten as the program is executed. Processor 101
When an input signal is input from the machine 81 side through the I / O control circuit 104, the pre-process of the main sequence program is performed according to the pre-process sequence program, and the main sequence program is sent to the main PMC 30. As a pretreatment,
The input signals input individually are arranged in a fixed order so that the main PMC 30 can easily process them, or the input signals are weighted and converted into numerical values.

Further, the processor 101 is the main PMC.
The output signal processed in 30 is post-processed and output to the machine 81 side. As the post-processing, the output signal from the main PMC 30 is converted into an arrangement of signals in accordance with the arrangement of each mechanical portion of the machine 81, or the numerical signal from the main PMC 30 is decoded and output as individual output signals. Is done.

As described above, the pre-process PMC100 executes the pre-processing and the post-processing of the sequence program which is conventionally executed only by the main PMC30, whereby the load on the main PMC30 can be reduced. Moreover, the processing efficiency of the entire system is improved.

Further, if the pre-process sequence program of the pre-process PMC 100 is made to perform the numerical calculation of the ladder diagram, the functional command, etc., and only the simple logical operation command is executed on the main PMC 30 side, the machine 81
Even if the wiring and the like are changed, it is only necessary to change the auxiliary program on the preprocess PMC 100 side, and the maintenance becomes easy. For example, if there are different types of machines A and B, different processes of the machines A and B are executed by the pre-process sequence program, and only the processes common to the machines A and B are executed in the main sequence program. As a result, even if the machine document changes, only the preprocess sequence program needs to be changed, and the change can be facilitated. Further, when the interface is different from the machines A and B, for example, when the address of a certain input / output signal is different,
The pre-process PMC100 converts this to the same address and sends it to the main PMC30,
The interfaces on the 30 side can be unified.

In this embodiment, the preprocessed PMC is used.
Although an example in which only one 100 is provided is shown, a plurality of 100 may be provided according to the number of points of the machine 81 and the like. Further, two types of pre-process PMC100 for pre-processing and post-processing may be provided and each may be operated independently.

The pre-process PMC 100 and the main PMC 30 are connected not only by bus connection but also by shared RAM connection as in the first embodiment, HDLC (high level data link control procedure) method, SDLC (synchronous data). A link control procedure) method or the like may be used.

[0058]

As described above, in the present invention, the sub P
Since C is connected to the main PC having the first processor, and the specific mechanism is controlled by the second processor, the sub-PC is added without changing the numerical control unit and the management program on the main PC side. can do. This reduces the load on the main PC. Further, even when a loader or the like is added to the installed machine, the system can be easily constructed by adding a printed wiring board or the like for the sub PC. Furthermore, since a sub PC can be added without going through the I / O unit,
It is possible to provide a sub-PC having the same program system and interface as the numerical control device. Therefore, the cause at the time of failure can be easily pursued, and since address allocation or the like is not required, maintenance becomes easy.

Further, the third processor provided in the PC is made to read and execute the main sequence program and the sub sequence program from the first ROM and the second ROM, respectively. Even when additional units are added, the added robot can be controlled by adding the second ROM in the PC without newly adding a printed wiring board to the numerical controller. Therefore, the system construction becomes easy.

Further, since the fifth processor of the preprocess PC is made to perform the preprocessing and the postprocessing of the sequence program executed by the fourth processor of the main PC, the load on the main PC can be reduced. You can In addition, even if the wiring of the machine is changed, the preprocess P
Since it is only necessary to change the processing on the C side, system construction and maintenance become easy.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a numerical controller according to the present invention.

FIG. 2 is a block diagram showing a configuration of a numerical control unit.

FIG. 3 is a block diagram showing a configuration of a main PMC.

FIG. 4 is a block diagram showing a configuration of a sub PMC.

FIG. 5 is a diagram showing a configuration of a second exemplary embodiment.

FIG. 6 is a diagram showing a configuration of a third exemplary embodiment.

FIG. 7 is a diagram showing a configuration of a preprocess PMC.

[Explanation of symbols]

 10 Numerical Control Unit (CNC) 20 Numerical Control Unit 30 Main PMC 40 Sub PMC 50 CRT / MDI Unit 60 External Equipment 70 I / O Unit 80 Machine 90 Robot 100 Preprocess PMC

Claims (12)

[Claims] 1. A PC (programmable controller)
In a numerical control device having a built-in controller, a numerical control unit for controlling the numerical control device as a whole, a main PC having a first processor coupled to the numerical control unit, and a second processor coupled to the main PC. And a sub-PC for controlling a specific mechanism section by means of a numerical controller. 2. The numerical controller according to claim 1, wherein the connection between the main PC and the sub PC is a bus connection. 3. The numerical controller according to claim 1, wherein the main PC and the sub-PC are connected via a shared RAM. 4. The numerical controller according to claim 1, wherein the main PC and the sub-PC are connected by an HDLC (High Level Data Link Control Procedure) method. 5. The numerical controller according to claim 1, wherein the connection between the main PC and the sub PC is an SDLC (Synchronous Data Link Control Procedure) system. 6. A PC (programmable controller)
In a numerical control device that incorporates a numerical control device, a numerical control unit that controls the entire numerical control device, a first ROM that is coupled to the numerical control unit and that stores a main sequence program, and a specific mechanism unit are provided. A second ROM that stores a sub-sequence program for controlling, a third processor that executes the main sequence program and the sub-sequence program, and the specific mechanism unit in the second ROM With I / O control circuit for connecting to
And a numerical control device. 7. The first ROM or the second R
7. The numerical controller according to claim 6, wherein one of the OMs is removed and only the other is operable. 8. A PC (programmable controller)
In a numerical control device having a built-in controller, a numerical control unit for controlling the entire numerical control device, a main PC having a fourth processor, coupled to the numerical control unit, and connected in series with the main PC, Preprocessing PC having a fifth processor for pre-processing and post-processing a sequence program executed by four processors
And a numerical control device comprising: 9. The numerical controller according to claim 7, wherein the fifth processor is an MPU (microprocessor unit). 10. The numerical controller according to claim 7, wherein the fifth processor is a DSP (digital signal processor). 11. The numerical controller according to claim 7, wherein the fifth processor is a PLA (Programmable Logic Array). 12. The fifth processor is a RISC
The numerical controller according to claim 7, which is a (reduced instruction set computer).