JPH10247105A - Programmable controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a programmable controller which does not need to input a tracing start command and a tracing interruption command from outside during the debugging of a user program and the operation of a system, and which can securely trace desired data. SOLUTION: The commands for starting and interrupting data tracing are previously written into the user program 40 based on a condition which is set in a data setting means 10. In the storage means 30, the storage operation of a data group is executed by the command inputted through the data setting means 10 and the command written into the user program 40 based on a condition on data tracing, which is set in the data setting means 10. Even if the commands of the start and the interruption of data tracing are not inputted from outside through the data setting means 10, the tracing operation of the data group is executed based on the command of the start and the interruption of data tracing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a programmable controller, and more particularly, to a data trace function of a programmable controller.

[0002]

2. Description of the Related Art Conventionally, a programmable controller has been provided with a data trace function for storing designated data at regular intervals and displaying the data for maintenance of the system. It is executed in accordance with a user command input from a monitored monitor device or the like.

Many of the data trace functions are used for debugging a user program or performing a recovery operation when an abnormality such as a failure occurs in a system.

[0004]

However, the data tracing function of the conventional programmable controller as described above is executed only by a user's command input from a monitor device or the like connected to the programmable controller. Even when an abnormality such as a failure occurs in the system, the data trace function does not operate until the user notices the abnormality or unless a command is intentionally input.

For this reason, it is possible to automatically perform processing such as starting a data storage operation at a point in time when an abnormality starts to occur in the behavior of the system, and terminating the storage operation at a point in time when a system failure occurs. There is a possibility that desired data, for example, data required for analyzing a system abnormality may be missed. The present invention has been made in view of the above-mentioned problems of the conventional technology, and has a feature of providing a programmable controller capable of reliably tracing desired data.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a user program, data setting conditions for setting a desired data group, data tracing start and interruption commands, and automatic data tracing. A data setting condition for inputting a data tracing condition for interrupting the data tracing, and setting a condition relating to the data tracing;
A storage unit for storing the data group at regular intervals based on a data trace start / interruption command or the data trace condition input via the data setting unit; and data stored in the storage unit. Display means for displaying a group, wherein the programmable controller performs data tracing set by the data setting means, wherein the user program includes a data tracing method based on conditions set in advance by the data setting means. Instructions to start and stop are written,
The storage unit performs a storage operation of the data group based on a condition set by the data setting unit, by a command input via the data setting unit or a command written in the user program. Features.

(Operation) In the present invention configured as described above, commands for starting and interrupting data tracing are previously written in the user program based on the conditions set by the data setting means. In the storage unit, the data group storage operation is performed by a command input through the data setting unit or a command written in the user program based on the data trace condition set by the data setting unit. Even when a command to start and suspend data tracing is not input from the outside via the data setting means, the trace of the data group can be performed based on the command to start and suspend data tracing written in advance in the user program. The operation is performed.

Therefore, there is no need to externally input a trace start command or a trace interrupt command during debugging of a user program or operation of the system.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration block diagram for explaining a data trace function in one embodiment of the programmable controller of the present invention. In this embodiment, as shown in FIG. 1, a data setting means 10 for setting conditions relating to data tracing and externally inputting a command to start and suspend data tracing.
And a user program 40 in which commands for starting and suspending data tracing are stored using the conditions set in the data setting means 10, and the conditions set in the data setting means 10 or the conditions written in the user program 40. On the basis of the data, a storage unit 20 for storing a data group at regular intervals and a display unit 30 for displaying the data group stored in the storage unit 20 are provided. The data setting means 10 performs data setting conditions for setting a data group necessary for debugging of a program or a recovery operation when an error occurs in the system, and automatically starts and interrupts data tracing. Data tracing conditions are input, and commands for starting and suspending data tracing are also given here. The data setting means 10 and the display means 30 are provided in the same device such as a monitor device.

The data tracing operation in the programmable controller configured as described above will be described below. First, the condition setting operation in the data setting means 10 will be described. In the data setting means 10, a scan interval, the number of data, a trigger condition, and the like, which are data trace conditions for a data group to be traced, are input and set. Here, the trigger condition means that when the data to be traced satisfies this condition,
This is a condition for tracing the set number of data and automatically ending the tracing.

FIG. 2 is a diagram showing an example of a setting screen on which conditions for performing data tracing are set in the programmable controller having the configuration shown in FIG.
In the example shown in FIG. 2, the scan interval is normal, the trace interval is 100 scans, and the number of trace points is 102.
4 points and the number of trace points after the trigger are set to 924 points, respectively. Also, Reference 1
00100 to 100103, 300116, 30011
7, 400117 is set to be traced (part B in the figure).
6,300117,400117,000100,10
A trigger condition of 0101 is set (part A in the figure).

Here, the setting of the trigger condition in section A in the figure will be described. For example, reference 30011
In No. 6, the type is set to UW, the trigger condition is set to 200, and the validity is set to E. Unsigned type UW
An ed word, which indicates the type of data. In this setting, when the unsigned word data of the reference number 300116 is 200, the trigger condition is satisfied.

Also, for example, reference 400116
In, the type is set to SW, the trigger condition is set to 500, and the validity is set to E. Type SW is signed w
ord, indicating the type of data. In this setting, when the signed word data of the reference number 400116 is not 500, it is determined that the trigger condition is satisfied. Thereafter, the trace of the set data is performed, and the trace automatically ends.

If the validity is set to D, the trigger condition is excluded. Also,
In reference 000100,100101,
Trigger condition is ON / OFF because it is digital data
Is set by In the section A in the figure, three references whose settings are valid are set, and when all the trigger conditions are satisfied, the trigger condition is satisfied.

When a trace start command is executed in the data setting means 10 or the user program 40, a storage operation in the storage means 20 is started, and when a trigger condition is satisfied, a preset condition is satisfied after the trigger condition is satisfied. The data is stored by the number of data that has been stored, and the data trace ends. The data before the trigger condition is satisfied within the range of the capacity of the storage means 20 is also stored. for that reason,
If it is desired to observe data before and after the occurrence of an abnormality in the system, a condition that occurs when an abnormality occurs may be set in the trigger condition.

When the trigger condition is not set, the data storage operation is continuously performed through the data setting means 10 or until the interruption command is input from the user program 40. However, since the capacity of the storage means 20 is limited, only the latest data within the range of the capacity of the storage means 20 is stored. Next, a data trace start / interruption command by a user program will be described.

FIG. 3 is a diagram showing an example of a function block for a command by a user program in the programmable controller having the configuration shown in FIG. As shown in FIG. 3, a trace start command 11 for starting data tracing, a trace suspend command 13 for suspending data tracing, and a forcibly establishing a trigger when a trigger condition is not satisfied. The manual trigger command 12 is input, and an output signal 14 for controlling the execution of the data trace is output based on the trace start command 11, the trace interrupt command 13, and the manual trigger command 12.

Here, the trace start command 11 and the trace stop command 13 are written in advance in the user program 40 by the user via the data setting means 10, so that the user program can be debugged or the system can be operated. It is not necessary to input a trace start command or a trace interrupt command from outside. Further, when the manual trigger command 12 is input, even if the above-described trigger condition is not satisfied, it is determined that the trigger condition is satisfied, and the manual trigger command 12 is input in the same manner as when the trigger condition is satisfied. After that, data is stored for a preset number of data, and then the data trace ends.

Next, the coexistence of a command from the user program and a command input from outside via the data setting means 10 will be described. In the trace start command, the command issued first has priority. That is, when the data trace has already been started by the user program, even if a trace start command is input from outside via the data setting unit 10, the input trace start command is ignored. Thereby, even when a data trace start command is input from outside via the data setting means 10 after the data trace has already been started by the user program, the data already stored in the storage means 20 is erased. Never. However, due to the limitation of the capacity of the storage means 20, data before a predetermined time has elapsed is erased, and new data is written in that part.

If the data trace has already been started by a trace start command input from the outside via the data setting means 10, even if the trace start command is issued by the user program thereafter, the trace start by the user program is started. Directive is ignored. When the set trigger condition is satisfied at the end of the data trace, thereafter, data is stored for a preset number of data, and the data trace ends.

When a trace suspend command is issued by a user program or a trace suspend command is input from outside via the data setting means 10, the trace processing is performed regardless of which trace start command is issued. Interrupted. Next, an operation in which the data stored in the storage unit 20 is displayed on the display unit 30 will be described.

FIG. 4 is a diagram showing a display example under the conditions shown in FIG. 2. The vertical axis represents the ratio of the number of data, and the horizontal axis represents time. As shown in FIG.
Is set, the data of each reference shown in FIG. 2 is displayed. Here, the set value s indicates the number of data when the ratio of the number of data is 100%, and the set value v is
The number of data on the point line P is shown.

[0023]

As described above, in the present invention,
In advance, instructions for starting and interrupting data tracing are written in the user program based on the conditions set by the data setting means, and stored in the storage means based on the conditions relating to the data tracing set by the data setting means. Since the operation of storing the data group is performed by a command input through the data setting means or a command written in the user program, a trace start command or a trace is bothersome during debugging of the user program or during operation of the system. A desired data group can be reliably traced without inputting an interruption command from outside.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram for explaining a data trace function in an embodiment of a programmable controller of the present invention.

FIG. 2 is a view showing an example of a setting screen on which conditions for performing data tracing in a programmable controller having the configuration shown in FIG. 1 are set.

3 is a diagram showing an example of a function block for a command by a user program in the programmable controller having the configuration shown in FIG. 1;

FIG. 4 is a diagram showing a display example under the conditions shown in FIG. 2;

[Explanation of symbols]

 Reference Signs List 10 Data setting means 11 Trace start command 12 Manual trigger command 13 Trace interruption command 14 Output signal 20 Storage means 30 Display means 40 User program

Claims (1)

[Claims] 1. A user program, data setting conditions for setting a desired data group, instructions for starting and suspending data tracing, and data tracing conditions for automatically suspending data tracing are input. A data setting unit for setting conditions relating to data tracing; and a data tracing start or interruption command input via the data setting unit or the data tracing condition. And a display unit for displaying a data group stored in the storage unit. The programmable controller performs data tracing set in the data setting unit. Starts data tracing based on the conditions set by the data setting means. And a command to interrupt the operation is written in the storage means based on a condition set in the data setting means, by a command input through the data setting means or a command written in the user program. A programmable controller, which performs a storage operation of the data group.