JPH0575803U - NC machine tool alarm history management device - Google Patents

Abstract

(57) [Summary] [Purpose] To automatically manage the history of alarm occurrences in machine tools, and to output useful alarm history data whenever necessary. [Structure] A CNC alarm occurrence monitoring unit 9 that monitors the occurrence of an alarm in the CNC 3 and the PMC 5 and creates alarm data including an alarm code and an alarm occurrence time that are predetermined according to the cause of the alarm when the alarm occurs. And a PMC alarm occurrence monitoring unit 11 are provided, and an alarm data storage unit 17 is provided which receives and stores the alarm data from either the CNC alarm occurrence monitoring unit 9 or the PMC alarm occurrence monitoring unit 11 and stores the accumulated alarm data in the alarm code. An alarm message storage unit 19 that stores an alarm message determined accordingly is provided. In response to a request from the keyboard 21, an alarm message according to the alarm data in the alarm data storage unit 17 and the alarm code of the alarm data is sent to the alarm message storage unit 1
9 is read out and these are displayed on the screen.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an alarm history management device for an NC machine tool, and more particularly to an alarm history management device for an NC machine tool that includes a programmable machine controller for sequence control and is automatically controlled by a computer NC.

[0002]

[Prior Art]

 An NC machine tool including a programmable machine controller for sequence control and automatically controlled by a computer NC has been put to practical use in various modes as an NC turret punch press and various other NC machine tools.

In these NC machine tools, when some trouble occurs in the machine tool, an alarm process is performed by the computer NC, and an alarm code and a simple alarm message are displayed on the display device. It has become so.

The screen display of the alarm code and the alarm message by the display device is performed when an alarm is generated, and when the alarm is released by a reset operation or the like, it is erased and becomes temporary.

[0005]

[Problems to be solved by the device]

 The screen display of the alarm code and the alarm message by the display device is temporary, and therefore the screen will not be displayed again when the alarm is released. Therefore, it is not possible to check the cause of past alarms.

Further, the alarm message displayed on the screen is generally poor, and the content of the alarm is often not understood only by this alarm message.

Further, from the viewpoint that the screen display by the display device at the time of alarm occurrence is transient, it has not yet been possible to display when the alarm occurred. There is no problem in the case of manned operation in which the worker monitors the occurrence of the alarm, but in the case of unmanned operation, it is not known when the alarm occurred and operation management of the machine tool is hindered. Will come.

The present invention has been made by paying attention to the above-mentioned problems in the conventional NC machine tool, and automatically manages the history (history) of alarm occurrence in the machine tool, and when necessary, It is an object of the present invention to provide an alarm history management device for NC machine tools that can output useful alarm history data at any time.

[0009]

[Means for Solving the Problems]

 According to the present invention, an object of the present invention includes a programmable machine controller for sequence control, and an alarm history management device for an NC machine tool automatically controlled by the computer NC. The alarm in the programmable machine controller and the CNC alarm occurrence monitoring unit that monitors the occurrence of an alarm and creates alarm data including an alarm code and an alarm occurrence time that are predetermined according to the cause of the alarm when the alarm occurs. The PMC alarm occurrence monitoring unit, the CNC alarm occurrence monitoring unit, and the PMC that generate alarm data including an alarm code and an alarm occurrence time that are predetermined according to the cause of the alarm when the alarm occurs Any of the alarm generation monitoring units The alarm data storage unit stores the alarm data and stores the alarm data, and the alarm message such as the alarm occurrence location, the alarm occurrence cause, and the alarm coping method defined according to the alarm code. The alarm data is read from the alarm data storage unit and the alarm data storage unit according to a request from the input means, and the alarm message stored in the alarm message storage unit is read based on the alarm code of the alarm data. And an alarm data output control unit that outputs the alarm occurrence time in the alarm data together with the alarm message corresponding to the alarm code of the alarm data, achieved by the alarm history management device of NC machine tool. To be done.

[0010]

[Action]

 According to the above configuration, the alarm occurrences in the computer NC and the programmable machine controller are monitored by the CNC alarm occurrence monitor and the PMC alarm occurrence monitor, respectively. Alarm data including a predetermined alarm code and an alarm occurrence time is created. The alarm data created by the computer NC alarm occurrence monitoring unit and the PMC alarm occurrence monitoring unit is stored and stored as a fault record (error logging) in the alarm data storage unit, and the alarm data storage unit stores the alarm data in response to a request from the input means. The alarm message stored in the alarm message storage section is read based on the read alarm data alarm code, and the alarm data output control section reads the alarm corresponding to the alarm data alarm code. The alarm occurrence time in the alarm data will be output together with the message. This output may be display output, print output, communication output, or a combination of these outputs.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment in which an alarm history management device for an NC machine tool according to the present invention is applied to an NC turret punch press.

The NC turret punch press 1 has a general structure, and the position determination of a workpiece is automatically controlled by a numerical control by a computer NC (hereinafter, CNC) 3 and a programmable machine controller (hereinafter, PMC). ) 5, sequence control, timer control, etc. are performed, and it operates according to the NC program of CNC 3 and the program of PMC 5.

The alarm history management device is generally indicated by reference numeral 7 in FIG. 1, and the alarm history management device 7 is composed of a man-machine controller (MMC).

The alarm history management device 7 includes a CNC alarm occurrence monitoring unit 9, a PMC alarm occurrence monitoring unit 11, a timer calendar 13, an input / output control unit 15, an alarm data storage unit 17, and an alarm message storage unit. 19, a keyboard 21 as an input unit, a CRT display 23 and a printer 25 as an output unit, and a communication control unit 27.

The CNC alarm occurrence monitoring unit 9 receives date and time data from the timer calendar 13 and monitors the occurrence of an alarm in the CNC 3, and when an alarm occurs, an alarm code that is predetermined according to the cause of the alarm is output. The alarm data including the alarm occurrence time recognized by the date and time data from the timer calendar 13, that is, the alarm data with the time stamp is created and output to the input / output control unit 15.

The PMC alarm occurrence monitoring unit 11 receives date and time data from the timer calendar 13 and monitors the occurrence of an alarm in the PMC 5, and when an alarm occurs, an alarm code that is predetermined according to the cause of the alarm, Alarm data including the alarm occurrence time recognized by the date and time data from the timer calendar 13, that is, alarm data with a time stamp is created and output to the input / output control unit 15.

The alarm data storage unit 17 is composed of a magnetic hard disk storage device, a RAM, etc., and stores a readable and writable alarm data file of a database type in which alarm data consisting of an alarm code and an alarm occurrence time is one data record. Is stored.

The alarm message storage unit 19 is composed of a ROM or the like, and stores an alarm message file in which detailed alarm messages such as a predetermined alarm occurrence location for each alarm code, an alarm occurrence cause, and an alarm coping method are written. It is stored and the alarm message can be read using the alarm code as a key.

The input / output control unit 15 is provided with alarm data from either the CNC alarm occurrence monitoring unit 9 or the PMC alarm occurrence monitoring unit 11, and this alarm data is added to the alarm data file in the alarm data storage unit 17 as an addition formula. The alarm data is read from the alarm data file in the alarm data storage unit 17 by writing or an instruction from the keyboard 21, and the alarm code of the read alarm data is used as a key to display the corresponding alarm message in the alarm message storage unit 19. The CRT display 23, the printer 25, and the communication control unit 27 are read out from the message file, and alarm data, that is, an alarm code, an alarm occurrence time, and an alarm message corresponding to the alarm code are set as one set. Is also output to any one. This output selection may be appropriately made by the user using the keyboard 21 as needed.

The communication control unit 27 connects the alarm history management device 7 to a host computer (not shown) arranged in a maintenance center or the like by a public line network such as a telephone so as to be communicable with each other. Alarm data of the generated alarm is transmitted to the host computer, enabling the construction of CIM.

According to the above configuration, when an alarm occurs in the CNC 3 or the PMC 5, this is recognized by the CNC alarm occurrence monitoring unit 9 or the PMC alarm occurrence monitoring unit 11, and the CNC alarm occurrence monitoring unit 9 or The PMC alarm occurrence monitoring unit 11 creates alarm data based on an alarm code determined in advance according to the cause of the alarm occurrence and the alarm occurrence time recognized by the date and time data from the timer calendar 13 and controls this input / output. Output to the unit 15.

The input / output control unit 15 inputs alarm data from the CNC alarm occurrence monitoring unit 9 or the PMC alarm occurrence monitoring unit 11 to additionally write the alarm data in the alarm data file in the alarm data storage unit 17. Do things. This causes error logging.

When the user operates the keyboard 21 to instruct the display of the alarm history from the keyboard 21, the input / output control unit 15 reads the alarm data from the alarm data file in the alarm data storage unit 17, and the read alarm. Using the alarm code of the data as a key, the corresponding alarm message is read from the alarm message file in the alarm message storage section 19, and the alarm code and alarm occurrence time in each alarm data and the detailed alarm message corresponding to this alarm code are written. Are output to the CRT display 23 as a set.

As a result, as shown in FIG. 2, the CRT display 23 displays the alarm code, the alarm generation time, and the alarm message corresponding to the alarm code as a set in the order of the alarm generation time.

When not all the display is made in one screen (one frame), the screen transition is made by the scroll key of the keyboard 21 or the next page key assigned to the function key or the like. The alarm data and the alarm message may be sequentially displayed on the screen.

Further, the alarm contents are classified by type from the alarm code of the alarm data of the alarm data file stored in the alarm data storage unit 17, and whether there are many alarms due to human causes or non-human causes in system operation. It is possible to obtain as statistical data whether there are many alarms. In this case, measures based on this statistical data can effectively reduce the occurrence of subsequent alarms.

The alarm code and the alarm occurrence time in each alarm data and the alarm message corresponding to the alarm code are printed by the printer 25 in place of or in addition to the screen display on the CRT display 23. It is also possible to obtain a hard copy of the alarm code, the alarm occurrence time, and the alarm message corresponding to this alarm code.

In the above-mentioned embodiment, the time stamp for giving the alarm occurrence time to the alarm data is based on the date and time data from the timer calendar 13 by the CNC alarm occurrence monitoring unit 9 and the PMC alarm occurrence monitoring unit 11. However, this time stamp may be performed when the input / output control unit 15 writes the alarm data in the alarm data file of the alarm data storage unit 17.

In addition to the man-machine controller, the alarm history management device 7 as described above can be configured by the CNC 3 by utilizing the function of the CNC 3.

[0031]

[Effect of the device]

 As can be understood from the above description, according to the alarm history management device of the NC machine tool according to the present invention, the occurrence of alarms in the CNC and PMC is monitored by the CNC alarm generation monitoring unit and the PMC alarm generation monitoring unit, respectively. When an alarm occurs, alarm data including an alarm code and an alarm occurrence time that are predetermined according to the cause of the alarm is created, and this alarm data is stored and stored as a fault record in the alarm data storage section, and the input means Request, the alarm data is read from the alarm data storage section, and the alarm message stored in the alarm message storage section is read based on the alarm code of the read alarm data. Alarm corresponding to the alarm code Since the alarm occurrence time in the alarm data is displayed, displayed, printed, and communicated together with the message, the history of the alarm occurrence in the machine tool is automatically managed, and the user can use the alarm even after releasing the alarm. Depending on the situation, you can see the alarm history data with detailed alarm messages at any time. This allows the user to accurately know the location of the alarm, the cause of the alarm, the alarm response method, etc. without looking at the instruction manual, etc. It is possible to recognize the alarm occurrence time from the time display.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment in which an alarm history management device for an NC machine tool according to the present invention is applied to an NC turret punch press.

FIG. 2 is an explanatory view showing a screen display example of an alarm history in the alarm history management device of the NC machine tool according to the present invention.

[Explanation of symbols]

 1 NC Turret Punch Press 3 Computer NC (CNC) 5 Programmable Machine Controller (PMC) 7 Alarm History Management Device 9 CNC Alarm Occurrence Monitoring Unit 11 PMC Alarm Occurrence Monitoring Unit 13 Timer Calendar 15 Input / Output Control Unit 17 Alarm Data Storage Unit 19 Alarm Message storage unit 21 Keyboard 23 CRT display 25 Printer 27 Communication control unit

Claims (1)

[Scope of utility model registration request] 1. An alarm history management device for an NC machine tool that includes a programmable machine controller for sequence control and is automatically controlled by a computer NC, monitors the occurrence of an alarm in the computer NC, and generates an alarm. Occasionally, a CNC alarm occurrence monitoring unit that creates alarm data including a predetermined alarm code and an alarm occurrence time according to the cause of the alarm, and an occurrence of the alarm in the programmable machine controller are monitored. A PMC alarm occurrence monitoring unit that creates alarm data including an alarm code and an alarm occurrence time that are predetermined according to the cause of the alarm, and an alarm than any of the CNC alarm occurrence monitoring unit and the PMC alarm occurrence monitoring unit. Give data And an alarm data storage unit that stores and stores the alarm data, an alarm message storage unit that stores an alarm message such as an alarm occurrence location determined according to the alarm code, an alarm occurrence cause, and an alarm countermeasure, and an input unit. Request, the alarm data is read from the alarm data storage unit, the alarm message stored in the alarm message storage unit is read based on the alarm code of the alarm data, and the alarm message corresponding to the alarm code of the alarm data is read. An alarm history management device for an NC machine tool, which further comprises an alarm data output control unit for outputting the alarm occurrence time in the alarm data.