JPH02156306A - Composite controller - Google Patents

Abstract

PURPOSE:To shorten the response delay from increase of a present value beyond a set value to detection of this increase in a programmable logic controller by comparing the present value with the set value by a comparing operation means on the numerical controller side. CONSTITUTION:This composite gain controller is provided with a numerical controller 1 to operate data for numerical control of a machine 15 and a programmable logic controller (PLC) to control the machine 15 by a program. The present value on the way of movement of the machine 15 and an arbitrary set value are compared with each other by a movement comparing part 28 of the controller 1. When it is judged as the comparison result by the comparing part 28 that the present value is larger than the set value, an interrupt signal of the judgement result is sent from the controller 1 to the PLC 2, and composite control of the machine 15 is performed by the controller 1 and the PLC 2. Thus, the response delay from increase of the present value beyond the set value to detection of this state in the PLC 2 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a composite control device having a numerical control device and a programmable logic controller (hereinafter referred to as PLC), and particularly relates to a composite control device that shortens control response time.

(Prior Art) Conventionally, there has been a composite control device of this type as shown in FIG. FIG. 3 shows a block configuration diagram of a conventional composite control device. In the figure, the conventional composite control device consists of a numerical control device (1 ) and the numerical control device (1)
and a PLC (2) that programmatically controls the machine (15).
Connect with the parallel bus (27) and tape (5)
An input section (4) for inputting processing information recorded in the PLC (2) and a setting display section (12) for setting and displaying control information on the PLC (2).
) is connected to the PLO (2), and the shared memory (21) provided in the numerical control device (1) is read out from the numerical control device (1) and the PLC (2), respectively.
The configuration is such that writing is performed and the machine (15) is controlled in a complex manner.

The numerical control device (1) includes a CPU (3) that executes control and arithmetic processing, and a storage unit (6) that temporarily stores programs and processing information programmed by the PLC (2). It is possible to read and write from both the movement calculation unit (7) that calculates the movement amount of the controlled shaft part (not shown) of the machine (15), and the CPII (3) and PLC (2). Shared memory (21)
CP reads and writes the shared memory (21).
A switching unit (22) that switches between LI (3) and PLC (2), and a switching unit (22) that switches between LI (3) and PLC (2); From C(2) to CPt1 (
3); an interrupt control unit (24) that controls interrupt signals from the CPU (3) to the PLC (2); Control part (23)
, (24) and an interface (25) that performs signal adjustment between the PLC (2) and the PLC (2).

The PLC (2) is a CPU (
11), a storage unit (13) that stores programs necessary for calculation of control processing of the CPII (11), and
an output unit (14) that outputs a control signal for controlling the machine (15) based on the calculation of U (11); and the CPU
(11) and an interface (26) for performing signal adjustment between the numerical control device (1) and the numerical control device (1).

Next, the numerical control device (1) configured as above and the PL
During C(2), if the current value of the moving machine (15) exceeds a certain value (set value), a predetermined process should be carried out. I will explain.

When a current value read request signal is input to the PLC (2) based on the program stored in the storage unit (13) (step 31)
, PLC (
2), an interrupt for a current value read request is issued (step 32). The interrupt control unit (23
) sends an interrupt signal to the PU (3) in response to this request (step 33), and the CPLI (3) determines whether reading of the current value to the shared memory (21) has been completed (step 33). Step 34).

If the reading is not completed as determined in step 34, the CPU (3) calculates the current value from the movement calculation unit (7) and writes it to the shared memory (21) (step 35).
. When the writing is completed, the shared memory (21) is transferred to the PLC (2).
The CPU (3) switches the switching unit (22) to P in order to pass it to the side.
Switch to LC (2) side (step 36), CPU
(3) sends an interrupt signal to the PLC (2) via the interrupt control unit (24) indicating that preparation for successive current value output is complete (step 37)
.

When the PLC (2) receives an interrupt signal indicating that the current value is ready to be read (step 38), it reads the current value from the shared memory (21) (step 39), and when the reading is completed, it interrupts the CPU (3) again. An interrupt signal indicating completion of reading the current value is sent via the control unit (23) (step 40.34). Thereafter, it is checked whether the read current value is greater than or equal to the set value (previously set to random C(2) from the setting display section (12)) (step 41). If the current value is greater than or equal to the set value, predetermined processing is performed (step 42);
Complete (step 43).

If the current value is not greater than the set value, the process returns to step 31, reads the current value again, and compares it with the set value. On the other hand, CPt1 (3) receives an interrupt from PLC (2) to indicate the completion of reading the current value. When the signal is received (step 34), the switching section (22) is switched to the CPII (3) side (step 44), and the process is completed (step 45).

Next, the case where processing information and the like are written from the PLC (2) to the numerical control device (1) will be explained using FIG.

When the processing information write signal is input manually to the PLC (2+) (
Step 50), the PLC (2) connects the parallel bus (2
7), interrupt control unit (
23) (step 51).

This interrupt control unit (23) controls the CPU (3) by an interrupt signal.
) (step 52). CPLI (3)
When receiving the interrupt, it sends a switching signal to the switching unit (22) (step 53), and switches the switching unit (22) to the PLC (2) side (step 54). On the other hand, CPt1 (3)
sends an interrupt signal indicating that the CPU is ready to the interrupt controller (24), and the interrupt controller (24) issues an interrupt to the PLC (2) (step 55).

When the PLC (2) receives the CPU preparation completion interrupt signal, the processing information is read out from the input section (4) to the PLC (2) via the setting display section (12) (step 56), and the parallel path (27) is read out. The processing information is written to the shared memory (21) via the computer (step 37). When writing of processing information to the shared memory (21) is completed (step 58), the CPU (
3) sends a switching signal to the switching unit (22) (step 59), and switches the switching unit (22) to the CPU (:l) side (step 60). After that, the CPII (3) reads out the processing information written in the shared memory (21) to the storage unit (6) (step 61), and completes (step 62).
.

[Problem that the invention seeks to solve]

Conventional composite control devices are configured as described above, so if you want to perform a predetermined process when the current value exceeds a set value, the current value calculated by the numerical control device (1) is
LII: Read in (2) and then compare with the set value.
Since this is done on the LC (2) side, there is a possibility that the current value is not the latest one, so the response from when the true current value exceeds the set value until it is detected by the PLC (2). There was an issue with delays.

The present invention was made to solve the above-mentioned problems, and the PLC (2
), the object of the present invention is to obtain a composite control device that can prevent a delay in response until it is detected.

(Means for Solving the Problems) A composite control device according to the present invention includes a numerical control device that performs calculations for numerically controlling external peripheral devices, and a programmable logic that program-controls the numerical control device and its reliability peripheral devices, etc. The numerical control device is provided with movement comparison means for comparing a current value of the external peripheral device with an arbitrary set value while the external peripheral device is moving, and the movement comparison means determines that the current value is equal to or higher than the set value. In this case, the numerical control device sends an interrupt signal representing the determination result to the programmable logic controller, and the external peripheral devices are jointly controlled between the numerical control device and the programmable logic controller.

[Effect]

In the present invention, when it is determined that the current value is greater than or equal to the set value, and the PLO wants to perform a predetermined process immediately, the numerical control device compares the current value and the set value, and when the current value is greater than or equal to the set value, If so, it is notified to the PLC as an interrupt signal, and the PLO can immediately perform a predetermined process based on the interrupt signal.

[Embodiment] Hereinafter, a composite control device according to an embodiment of the present invention will be described based on FIGS. 1 and 2. FIG. 1 is a block diagram of the apparatus of this embodiment, and FIG. 2 is an operational flowchart of the apparatus of this embodiment. In each of the above figures, the composite control device according to this embodiment includes a numerical control device (1) that calculates data for numerically controlling a machine (15);
and a programmable logic controller (PLC) (2) that programmatically controls the machine vA (15), and a movement comparison unit (2) that compares the current value and an arbitrary set value while the machine (15) is moving. 28) is provided in the numerical control device (1), and when the movement comparison section (28) determines that the current value is higher than the set value, the numerical control device (1) transmits the determination result to the PLC (2). An interrupt signal is sent to the machine (!5) between the numerical control device (1) and the PLC (2).
).

Next, the operation of the composite control device according to this embodiment based on the above configuration will be explained based on FIGS. 1 and 2.

First, setting values are written from the setting display section (12) into the shared memory (21) by the operation shown in FIG. Next, a comparison request signal based on the program stored in the storage section (13) is manually input to the PLC (2) in order to have the numerical control device (1) check whether the current value is greater than or equal to the set value (step 71). ). This comparison request signal is sent to the human-powered PLC (2
), the interrupt control unit (23) of the numerical control device (1) is interrupted by a comparison request (step 72). The interrupt signal from the interrupt control section (23) is sent to the CPII (3) (step 73), and the CPU (3) instructs the comparison operation section (28) to perform a comparison operation. (Step 74) If the comparison operation has not been completed, the set value written from the PLC (2) from the shared memory (21) is determined. Step 75) to read out the current value from the movement calculation unit (7), step 76) to check whether the current value is greater than or equal to the set value (step 77).
). If the current value is greater than or equal to the set value, the common memory (21
) to the PLC (2) side, the CPU (3) switches the switching unit (22) to the PLC<2) side (step 7
B) An interrupt signal is sent from the CPII (3) to the PLC (2) via the interrupt control unit (24) to indicate that the comparison operation has been completed (the current value has exceeded the set value) (step 79).

When the PLC (2) receives an interrupt signal indicating the completion of the comparison operation (step 80), it performs a predetermined process and at the same time sends the interrupt signal indicating the completion of the comparison operation to the CPU again via the interrupt control unit (23).
Send to (3) (step 81) and complete (step 82).

On the other hand, when the CPU (3) receives an interrupt signal indicating the completion of the comparison operation from the PLC (2) (step 74), the switching unit (22
) to the CPU (3) side (step 83), and the process is completed (step 84).

(Effects of the Invention) As described above, according to the present invention, since the comparison between the current value and the set value is performed by the comparison calculation means on the numerical control device side, the PLO is started after the current value exceeds the set value. This has the effect of shortening the response time until it is detected.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of a composite control device according to an embodiment of the present invention, FIG. 2 is an operation flowchart of the device according to an embodiment of the present invention, and FIG. 3 is a block diagram of a conventional composite control device. FIG. 4 shows an operation flowchart of the conventional apparatus, and FIG. 5 shows an operation flowchart of writing machining information into the numerical control device of each apparatus of the present invention and the conventional apparatus. (1)...Numerical control device (2)...Programmable logic controller (P
LC) 3) (11)...CPU 4)...Human power section 7)...Movement calculation section 21)...Shared memory 22)...Switching section 23), (24)...Distribution Including control unit (28)...comparison calculation unit Note that the same reference numerals in each figure indicate the same or equivalent parts. Agent Masuo Oiwa (self-motivated) 21 Name of the invention Composite control device 3, relationship to the amended case Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric shares Company representative Moriya Shiki 4, agent address 6 Contents of amendment (1) The description "signal adjustment" in lines 12 and 19 of page 3 of the specification is amended to read "signal transmission and reception." (2) The description "(Step 37)" on page 6, line 18 of the specification is corrected to "(Step 57)." (3) The statement "to prevent" on page 7, line 18 of the specification is amended to read "to shorten." (4) The description ``Movement comparison unit (28) J'' on page 9, lines 12 and 13 of the specification is corrected to ``comparison calculation unit (28) J.'' (5) Line 19 of page 1O of the specification. 'Common memory (21)
The description "J" is amended to "Shared memory (21) J." The above is the column for the detailed description of the invention in the specification subject to the amendment, No. 2-2-3 Marunouchi, Chiyoda-ku, Tokyo.

Claims (1)

[Claims] It has a numerical control device that performs calculations to numerically control external peripheral devices, and a programmable logic controller that programmatically controls the numerical control device and other external peripheral devices, and the external peripheral devices are connected between the numerical control device and the programmable logic controller. In a composite control device that performs multiple control of the external peripheral device, the numerical control device is provided with a movement comparison means for comparing the current value of the external peripheral device while it is moving with an arbitrary set value, and the movement comparison means determines that the current value is equal to or higher than the set value. 1. A composite control device characterized in that when it is determined that the numerical control device sends an interrupt signal representing the determination result to a programmable logic controller.