JP3211285B2 - Production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonvolatile memory, for example, an EEPROM and a volatile memory, for example, an SRA.
The present invention relates to equipment that is divided into M and provided.

[0002]

2. Description of the Related Art In equipment, it is general that various kinds of data necessary for performing predetermined processing are stored in a RAM, which is a volatile memory. The RAM has an advantage that data can be stored and held by using a backup power supply, and that data can be changed in a timely manner.

[0003]

However, the above RAM
When the backup power is cut off due to an external factor, various data are lost or become uncertain data. As a result, there is a problem that an abnormal operation of the mechanical movable part of the equipment is caused.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. The present invention finds an abnormality in data in a RAM based on data in a non-volatile memory, rewrites data in the RAM correctly, and corrects equipment. The purpose is to be able to guarantee operation.

[0005]

According to the present invention, there is provided a production facility for automatically processing, assembling, or inspecting an object, a machine movable portion of the production facility, and a moving amount for operating the machine movable portion.
Retaining control data including a volatile memory, and the machine control unit for controlling the operation of the machine moving part of the production equipment based on the control data held in the volatile memory in accordance with the control program, said machine movable part A non-volatile memory that holds equipment data indicating a movable limit point of the non-volatile memory ;
Discovered based on equipment data held in memory,
Detection processing means for rewriting control data to normal data;
It is provided with.

[0006]

According to the present invention, production held in a volatile memory
Control including the amount of movement for operating the mechanical moving parts of the equipment
The data show that electromagnetic waves during production equipment operation,
Damage, data corruption, etc.
Even if the abnormality is held in non-volatile memory
Discover based on data and rewrite control data to normal data
The movable parts of the production equipment
Trouble running over and causing damage to the moving parts and other parts of the machine
Can be prevented .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a control system using a nonvolatile memory according to the present invention, wherein 1 is a machine control section, 2 is a machine movable section, and 3 is a storage constituted by a nonvolatile memory. Means 4, storage means comprising a volatile memory,
5 is an abnormality detecting means, and 6 is a transfer means. FIG. 2 is an example of equipment data showing the mechanical movable part 2 and the movable limit points 7 and 8 of the mechanical movable part 2, and FIG. 4 is an example of a table structure inside the storage means (volatile memory) 4.

In FIG. 1, a machine control unit 1 comprises a microprocessor, and controls a machine movable unit 2 based on control data stored in a storage unit (volatile memory) 4 in accordance with a control program written in a memory (not shown). Control. Further, the abnormality of the control data held in the storage means (volatile memory) 4 is stored in the storage means (non-volatile memory) 3.
Abnormality detection processing means for finding based on this data and rewriting the data in the storage means (volatile memory) 4 correctly.

The storage means (non-volatile memory) 3 is composed of, for example, an EEPROM, and holds equipment data indicating the movable limit points 7 and 8 of the mechanical movable section 2 shown in FIG. 2 in a table structure shown as an example in FIG. are doing. The storage means (volatile memory) 4 is composed of, for example, an SRAM,
The control data is held in a table structure shown as an example in FIG.

Next, the data abnormality detecting process will be described with reference to the flowchart shown in FIG. In step 100, the facility data stored in the storage means (non-volatile memory) 3 is read, and in step 110, the control data stored in the storage means (volatile memory) 4 is read, and in step 12
0 indicates whether the control data is within the range of the movable limit points 7 and 8,
Investigate and determine abnormalities based on equipment data. If normal,
In step 130, the next control data stored in the storage means (volatile memory) 4 is read, and an abnormality is determined based on the equipment data stored in the storage means (non-volatile memory) 3. This abnormality detection is performed for all control data stored in the storage means (volatile memory) 4. If an abnormality in the control data is detected, all the control data stored in the storage means (volatile memory) 4 is correctly rewritten in step 160. Rewriting of control data is performed based on the same control data saved in an external storage device (FD) or the like. Alternatively, the operator is warned of an abnormality in the data, the control data is re-input, and the control data is rewritten correctly. The abnormality detection process is performed at regular intervals or when a product type is selected.

[0012]

As described above , according to the present invention, the volatile memory has the advantage that the data can be stored and held by using the backup power supply and the data can be changed in a timely manner. If the backup power is cut off, various data will be lost or become indefinite data, causing a problem that causes abnormal operation of the equipment,
An abnormality in the data held in the volatile memory can be found based on the data held in the nonvolatile memory, and the data in the volatile memory can be correctly rewritten to ensure that the equipment operates normally.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a view showing a mechanical movable portion and its movable limit point.

FIG. 3 is a diagram showing an example of a table structure inside a storage unit composed of a nonvolatile memory;

FIG. 4 is a diagram showing an example of a table structure inside a storage unit composed of a volatile memory;

FIG. 5 is a flowchart showing a data abnormality detection process on a volatile memory.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine control part 2 Machine movable part 3 Storage means (nonvolatile memory) 4 Storage means (volatile memory) 5 Abnormality detection processing means 6 Transfer means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-26492 (JP, A) JP-A-63-167947 (JP, A) JP-A-2-96201 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G05B 9/02 G05B 15/02

Claims (4)

(57) [Claims] 1. A control system including a machine movable part of a production facility for automatically processing, assembling, or inspecting an object, and a movement amount when operating the machine movable part.
A volatile memory for holding data, and a machine control unit for controlling the operation of the machine moving part of the production equipment based on the control data held in the volatile memory in accordance with the control program, the movable limit of the machine movable part Retain equipment data indicating points
A non-volatile memory, and an abnormality of control data held in the volatile memory.
Based on the equipment data stored in the nonvolatile memory
Detection to detect and rewrite the control data to normal data
Production equipment comprising: processing means . 2. The detection processing means is stored in a volatile memory.
Control data is within the range of the movable
If not, it is judged as abnormal and the control data is
The production facility according to claim 1, wherein the production facility is rewritten . 3. When the production type is selected, the inspection processing means
Error detection and rewriting of control data when an error occurs
Production facility according to claim 1 or claim 2 performs. 4. The production facility according to claim 1, wherein an alarm is issued to an operator when an abnormality is detected.