JP3355853B2 - Control device in processing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a programmable controller (hereinafter referred to as PC) provided for a plurality of automatic processing machines.
(Which may be referred to as) in the machining system.

[0002]

2. Description of the Related Art Generally, a control device in a machining system includes a plurality of machining centers MC1 as shown in FIG.
To the MCNs (automatic processing machines) are provided with slave stations PC for controlling the operation and monitoring of the corresponding machining centers MC1 to MCN.
And a main PC that controls the entire machining system.

[0003]

In the above-mentioned processing system, the ladder program of each slave station PC includes an operation program for controlling the operation of the corresponding machining center and a monitor program for detecting the operating state of the corresponding machining center. Contains. Each slave station PC has a common link register 31 (shown in FIG. 7).
Although the own station area of the link register 31 is allocated, the register area differs for each slave station PC. Therefore, the operation program portion created corresponding to the area of the link register 31 includes the slave station P
C, it is necessary to create a different operation program for each PC, and it takes time and effort to create the program. In addition, the change of the operation program itself of each slave station PC due to the change of the link register allocation. There was an accompanying problem.

In the monitor program, for example, the machining process of the machining centers MC1 to MCN is divided into a plurality of processes, and the cycle time (standard time) from one process to the next process is measured and displayed on the monitor. . For monitoring, each slave station PC describes a condition for counting the cycle time of the process, and counts the cycle time when the condition is satisfied, and stores the result in a memory area distinguished for each process. Cycle time monitor program is provided as a ladder program. As shown in FIG. 8, for example, in the slave station PC1, in the ladder program R1, the condition A (for example, when the relay R1 is O
N), the cycle time of the step A is counted and stored in the memory area A1, and according to the ladder program R2, when the condition B (for example, the relay R2 is ON), the cycle time of the step B is calculated. Measure and memory area B
1 and stored in the slave station P
In the ladder program R3 of C2, when the condition C (for example, the relay R3 is turned on) is set, the cycle time of the process C is counted and stored in the memory area C1. As described above, since the conditions for measuring the cycle time and the memory area for storing the measurement results are different for each slave station PC, it is necessary to create a different monitor program for each slave station PC. If there is a change or the like, it is necessary to directly change the ladder program of the slave station PC, which is a complicated operation. Further, a plurality of machining centers MC constituting the machining system
When 1 to MCN are of the same model, most of the ladder programs of the slave station PCs are common, but the slightest part such as the operation program based on the allocation of the link register 31 is different as described above. , The slave station PC as a whole
The ladder program of each slave station PC is not exactly the same between the slave station PCs. In the operation check of the ladder program of the slave station PC, it is necessary to check the ladder programs of all slave station PCs, and the time required for the check is long. There was a problem.

[0005]

In order to solve the above problems, in claim 1, each of a plurality of automatic processing machines is provided with a slave station programmable controller for control, and each slave station programmable controller is linked to each other. Of each slave station in the control device of the machining system linked to the main programmable controller.
The programmable controller operates the corresponding automatic processing machine.
Operation program to control the operation and the
A ladder including a monitor program that detects the operating state
Program, and these operation programs and monitor programs
Program, respectively including the common ladder describing the slave station programmable controller-specific data as a parameter
In addition , the main programmable controller has a data table that stores unique data for each slave station programmable controller corresponding to each slave station programmable controller and is applied to the parameters used for the common ladder, and that the control device is activated when the control device is started. And a data table transfer means for transferring the data table to a corresponding slave station programmable controller .
You. A second aspect of the present invention is characterized in that a computer is connected to the main programmable controller as data table setting means. A third aspect of the present invention includes a slave station programmable controller for controlling a plurality of automatic processing machines of the same model. In a control device in a machining system in which each slave station programmable controller is linked to each other and also linked to the main programmable controller, the ladder program of each slave station programmable controller controls the operation of the corresponding automatic processing machine.
Operating program to control and the operation status of the corresponding automatic processing machine
A ladder program comprising a common ladder in which data specific to each slave station programmable controller is described as a parameter. Corresponding to the above, a data table storing unique data for each slave station programmable controller to be applied to the parameters used for the common ladder is provided, and when the control device is started, the data table is transferred to the corresponding slave station programmable controller. It is characterized by comprising a data table transfer means for transferring.

[0006]

According to the first aspect, when the control device is started, the data table transfer means transfers the data table provided in the main programmable controller to each of the slave station programmable controllers, and each of the slave station programmable controllers transfers the data table. By applying the unique data of the data table to the parameters of the common ladder, operation control and monitor control for detecting the operation state of the corresponding automatic processing machine are performed. According to the second aspect , a data table is set in the main programmable controller by a computer, and unique data of the set data table is changed or added. According to the third aspect, when a plurality of automatic processing machines constituting the machining system are of the same model, the ladder programs of the slave station programmable controllers are all the same ladder in each slave station programmable controller. Check is
It is only necessary to check the ladder program of one slave station programmable controller.

[0007]

Next, an embodiment of the control device 1 in the processing system of the present invention will be described with reference to the drawings. As shown in FIG. 1, machining centers MC1 to MCN of the same model
A plurality of transfer machines (shown as automatic processing machines) are arranged side by side. These machining centers M
A transfer conveyor 2 on which the workpiece W is placed is provided in front of C1 to MCN, and the conveyor 2 transports the workpiece W to the front of each of the machining centers MC1 to MCN for processing. Each of the machining centers MC1 to MCN is a slave station PC1 to P
It has CN. These slave stations PC1 to PCN are:
They are linked to each other via a serial communication cable 3 and also to a main PC that controls the entire processing system. The main PC is a computer 5 for setting and registering data tables 11 and 12, which will be described later.
(Data table setting means) and a display monitor 6 for displaying monitor information and the like are connected. Each of the machining centers MC1 to MCN includes an NC control device (not shown) for controlling the operation of a spindle rotating motor and a spindle head moving hydraulic unit.

As shown in FIG. 2, the ladder program of the slave stations PC1 to PCN (here, only the slave station PC1 is shown)
An operation program 8 for controlling the operation of the corresponding machining centers MC1 to MCN;
Monitor program 9 for detecting the operating state of C1 to MCN
And The ladder program of each of the slave stations PC1 to PCN as such an operation and monitor program is as follows.
Each of the slave stations PC1 to PCN is configured to include a common ladder in which data unique to the station is described as a parameter. In the present embodiment, the operation including the ladder program described using the parameter and the monitor program are controlled. Since the machines are exactly the same machining center, each PC
Is exactly the same. The common ladder program including the parameters will be described with reference to the cycle time count ladder of the monitor program 9, for example, as shown in FIG.
Is used as a parameter of the common ladder R, a condition X (for example, PC
Memory area Y for storing the counted cycle time, and these conditions X
As will be described later, unique data set in the monitor data tables 121 to 12N is applied to the memory area Y and the memory area Y is executed as a program unique to each slave station PC. As shown in FIG. 7, common ladders Ra, Rb... In the operation program associated with the exchange of data with the link register 31 Have the same control function), each ladder Ra, Rb ...
Is described as a parameter Z using the head address of the link register 31 as to which address of the allocated area of the link register 31 corresponds. That is,
In each of the slave stations PC1 to PCN, the allocation start address Za (Zb...) Of the link register 31 is assigned to each of the common ladders Ra and Rb.
, The ladder Ra in each of the slave stations PC1 to PCN corresponds to the allocation start address Za (Zb...) Of the link register 31, and the ladder Rb is the address Za + 1 (Zb + 1, Zb + 1, ...), the ladder Rc further corresponds to the next address, and so on.

Next, the operation of the main PC will be described with reference to FIG. In step 1, the data tables 11 and 12 are set and registered in the register area 20 (shown in FIG. 2) of the main PC by the computer 5, and the data tables 11 and 12 thus set are turned off by turning off the power of the main PC. Is also stored. When the power of the main PC and each of the slave stations PC1 to PCN is turned on in step 2, the main PC stores the data tables 11 and 12 set in the register area 20 in the respective slave stations PC1 to PCN.
N, and this step 2 constitutes a data table transfer means. Thereafter, in step 3, the main PC controls the entire processing system. Next, the operation of the slave station PC will be described. In step S1, each of the slave stations PC1 to PCN stores its own unique data table 111 to 11N, 121 to 121 corresponding to its own station transferred to its register area 30 from the main PC. 12N is fetched and stored, and the data table 1 thus stored is stored.
The unique data of 11-11N and 121-12N are applied to the parameters in the ladder program, and in step S2, the operation control and the monitor control of the corresponding machining centers MC1-MCN are performed.

Next, the operation data table 1 of the main PC
4 will be described with reference to FIG. 4. The registered number of slave stations PC is set at address 0, and slave stations P are set at addresses 1 to 10.
A data table 111 for C1 is assigned, a data table 112 for slave station PC2 is assigned to addresses 11 to 20, and data tables 113 to 11N for slave stations PC are similarly set for the following slave stations PC3 to N. Areas are allocated, and data tables 111 to 111 for each slave station PC are allocated.
The size of the 11N memory is the same. In addition, each slave station P
The contents of the data tables 111 to 11N for C1 to PCN will be described. In the data tables 111 to 11N, each head address (address 1 for PC1 and address 11 for PC2) includes the identification of each slave station PC. The code is stored, the next address stores the allocation start address of the link register of each slave station PC, and the next address stores the number of the addresses. Decided and stored.
Then, the data tables 111 to 11N for each slave station are used.
Is transferred to each slave station PC, and stored in the same memory area at the transfer destination (see the right diagram in FIG. 4). Thereby, when each slave station PC wants to know the unique data relating to the operation addressed to itself, it is sufficient for each PC to read the contents of the exactly same memory address, and the reading part of the unique data becomes a common ladder. I have.

Next, the monitor data table 12 will be described with reference to FIG. Operation data table 11
Similarly, the monitor data tables 121 to 12N for the slave stations PC1 to PCN are assembled to form one monitor data table 12. The monitor data tables 121 to 12N for the slave stations of the main PC have the same memory size.
In 1 to 12N, the number of measurement of the cycle time monitored by each slave station PC (the number of processes for which the cycle time is to be measured) P
And the condition for measuring the cycle time and the address for storing the measured cycle time are stored in correspondence with each slave station PC. For example, in the monitor data table 121 for the slave station PC1, “2” is stored as the number P of cycle times measured by the slave station PC1, and A,
B: The conditions for monitoring the two processes are stored as internal relay numbers a and b, and the address for storing the monitored cycle time is stored in the register area of the slave station PC1.
30 are stored as addresses Ta and Tb, and the monitor data table 122 for the slave station PC2 stores the measured number P
Is stored as an internal relay number c, and an address for storing the monitored cycle time is stored as an address Tc of the register area 30 of the PC 2. . The monitor data tables 121 to 12N are stored in the transfer destination (slave station P
In C), the head addresses are stored in the memory area so as to be the same address, and each slave station PC has a common ladder for reading unique monitor data.

Next, the operation of the control device 1 in the processing system configured as described above will be described. First,
In the register area 20 of the main PC, the operation data table 11 composed of the unique data tables 111 to 11N corresponding to the slave stations PC1 to PCN and the monitor data table 12 composed of the unique data tables 121 to 12N are stored by the computer 5 as described above. Are registered (step 1). Next, the main PC reads the register area 20.
Data tables 111 to 11N and 12 registered in
1 to 12N are transferred to the corresponding slave stations PC1 to PCN, respectively (step 2). Each of the slave stations PC1 to PCN stores data tables 111 to 11N, 1 corresponding to the transferred own station.
21 to 12N are fetched and stored in the register area 30 (S1), and the data tables 111 to 11N, 12
By applying the unique data stored in 1 to 12N to the parameters of the common ladder, the corresponding machining centers MC1 to MC1
The operation control and monitor control of the MCN are performed (S2), and the main PC controls the entire processing system (step 3).

In the operation control by the slave stations PC1 to PCN,
For example, the allocation start address Za (Zb...) Of the link register 31 of the unique operation data tables 111 to 11N is read, and this is associated with the link register 31 in the operation program, and the allocation start address is set as the parameter Z. It is applied to the described common ladders Ra and Rb and executed. In the monitor control of the slave stations PC1 to PCN, the number of times P of cycle time measurement is first read out from the monitor data tables 121 to 12N unique to the own station taken in the memory of the own station, and the number of times P is described as a parameter. This is applied to the cycle time count ladder repetition execution ladder described above. For example, the slave station PC1 reads out the cycle time measurement condition a and the cycle time storage address Ta of the preceding process A in time series, and reads the cycle time. Parameters X and Y of common ladder R for measurement
Then, the instruction is executed by applying to the parameters X and Y of the common ladder R for cycle time measurement by reading the cycle time measurement condition b and the cycle time storage address Tb in the process B. Execute. Conventionally, when monitoring the cycle time, a ladder is required for each slave station PC as many times as the cycle time measurement.
In addition, the same ladder is used for each slave station PC, and the ladder program can be shortened.

In the present embodiment, the slave stations P for controlling the machining centers MC1 to MCN of the same model in which the same control is performed.
The ladder program of C1 to PCN is stored in each slave station PC1 to PC
Since the same ladder is used among the N stations, if the ladder program of any one of the slave stations PC is checked in the operation check of the ladder program, the ladder programs of all the slave stations PC1 to PCN are similarly checked. ,
The time required for the program check can be reduced. Further, when the area of the link register of each PC is changed or a processing step for measuring the cycle time is added, it is not necessary to change the ladder programs of all the slave stations PC1 to PCN as in the related art. 5, the operation data table 11 and the monitor data table 12, which are set in the register area 20 of the main PC, are changed and added. When the power is turned on, these data tables are transferred to the corresponding slave station PC. If each station P
In C, the changed data can be controlled by applying the unique data to a common ladder including parameters. In the above embodiment, various data tables 1 are stored in the register area 20 of the main PC via the computer 5.
Since 1 and 12 are set, management becomes easy. In the above embodiment, a table for counting cycle time is exemplified as the monitor data table 12, but in addition to this, for example, a table for tool information and abnormality information may be provided. .

Hereinafter, embodiments understood from the embodiments of the present application will be described together. (1) The monitor program includes a cycle time measurement program for measuring a cycle time of a machining process, and the cycle time measurement program includes a common cycle in which measurement conditions and a memory area for storing the measured cycle time are described as parameters. Time count ladder,
Describe the number of cycle time measurements as a parameter,
And an execution means for repeatedly executing the cycle time count ladder, and the contents of the data table provided to each slave station PC include the number of machining steps for which cycle time is to be measured, measurement conditions, and memory area. The control device according to claim 2, wherein the control device is provided. (Effect) Conventionally, a plurality of cycle time count ladders provided for each of a plurality of processing steps for which cycle time is to be measured, have been improved even if there are a plurality of processing steps to be measured.
In C, the number becomes one and the program becomes shorter. (2) The operation program portion associated with the memory area of the link register is a common ladder describing the allocation start address of the link register as a parameter,
3. The control device according to claim 2, wherein the content of the data table provided to each slave station PC includes an allocation start address. (Effect) Even if there is a large number of common ladders corresponding to the memory area of the link register, the correspondence between the large number of common ladders and the link register is determined only by giving the assignment start address to the parameter, and It is not necessary to prepare a large number of parameter data corresponding to the number, and the data can be easily changed.

[0016]

As described above, according to the present invention, for example, a change in the assignment of the link registers, a change in the correspondence between the link program and the address of the link register in the operation program, and an increase in the cycle time measurement step in the monitor program. When there is a change, the unique data is changed and added to the data table of the main PC, and is transferred to the corresponding slave station PC, whereby control corresponding to the change can be performed by each slave station PC. Therefore, unlike the related art, it is not necessary to change or add the ladder program itself, and since the ladder program is collectively managed by the main PC, the data management becomes easy. In the case where the data table for the main PC is set using a computer, data setting and management can be easily performed. Further, in the case where the ladder programs of the slave station PCs that control a plurality of automatic processing machines of the same model are all the same, it is only necessary to check the operation of the ladder program of the slave station programmable controller for one slave station programmable controller. It is possible to shorten the time required for the program check.

[Brief description of the drawings]

FIG. 1 is an overall view of a control device in a processing system.

FIG. 2 is a configuration diagram of a main PC and a slave station PC.

FIG. 3 is a flowchart of the operation of a main PC and a slave station PC.

FIG. 4 is an explanatory diagram of an operation data table.

FIG. 5 is an explanatory diagram of a monitor data table.

FIG. 6 is an explanatory diagram of a common ladder.

FIG. 7 is an explanatory diagram showing a relationship between a link register and an operation program (operation ladder).

FIG. 8 is an explanatory diagram of a cycle time measurement ladder in a conventional slave station PC.

[Explanation of symbols]

1 control device in processing system, 5 computer, 6 display monitor, 8 control program, 9 monitor program, 11 operation data table, 12
Monitor data table, MC1-MCN machining center

Claims (3)

(57) [Claims] 1. A control device in a machining system in which each of a plurality of automatic processing machines has a slave station programmable controller for control, wherein each slave station programmable controller is linked to each other and also linked to a main programmable controller. , Each slave station program
The mable controller controls the operation of the corresponding automatic processing machine.
Operating program to control and the operation status of the corresponding automatic processing machine
Ladder program including a monitor program for detecting the condition
Comprising a ram, these operating program, monitor program
Arm is a common ladder describing the slave station programmable controller-specific data as parameters include respective main programmable controller, in response to each slave station programmable controller, each slave station to be applied to the parameters used in the common ladder A processing system comprising: a data table storing unique data for a programmable controller; and a data table transfer unit for transferring the data table to a corresponding slave station programmable controller when the control device is started. Control device. 2. The main programmable controller
Is a computer connected as a data table setting means
Control device in the processing system according to claim 1, characterized in that it is. 3. A control system for each of a plurality of automatic processing machines of the same model.
Each slave station has a programmable controller for the slave station.
Programmable controllers are linked to each other
With the main programmable controller
In the control device of the machining system
The ladder program of the station programmable controller is
Operation program for controlling the operation of the corresponding automatic processing machine
And a monitor that detects the operating status of the corresponding automatic processing machine
And the ladder program for each slave station program.
The data specific to the programmable controller is used as a parameter.
The same program containing the common ladder described
The main programmable controller is configured
The above common line corresponds to the station programmable controller.
Slave station programmer that applies to the parameters used in the
Data table that stores the unique data for the controller
When the control device is started, the data
Cable to the corresponding slave station programmable controller.
A control device in a processing system, comprising: a data table transfer unit for sending .