JPH041804A - Monitoring device for programmable controller - Google Patents

Abstract

PURPOSE:To quickly display an active block by switching automatically a display screen to a monitor screen of a designated block when this clock becomes active. CONSTITUTION:A new active block monitor designation table 112 is provided for the display monitor, and a user is instructed to previously designate his/her desired starting block to be monitored. At the same time, a block start detection means 122 is provided together with an active block monitor designation means 123. So that the start of the designated block is detected and a displayed screen is automatically switched to the monitor screen of the relevant block. Thus a desired monitor can be automatically monitored concurrently with its start as long as a desired active block to be monitored is previously and automatically designated. As a result, the active block is quickly displayed on a monitor screen.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a programmable controller monitor device that monitors the execution state of a programmable controller that executes a program based on the SFC language.

[Conventional technology]

Recently, SFC has been used as a means of creating programs using peripheral devices.
A method has been put into practical use in which a program created in a language (hereinafter referred to as an SFC program) is loaded into a programmable controller and executed, and the execution state of the program is monitored using a monitor device.

FIG. 4 shows an example of an SFC program.

Here, the above SFC program is a control flow expressed in a flow format, and consists of "steps" indicating a certain group of actions and "transitions" indicating conditions for shifting the execution of the steps. Consists of combinations. A step that is being executed is called an "active step," and when the associated transition conditions are met, it becomes inactive and execution shifts to the next (step).

In FIG. 4, 401 indicates a "step" and 402 indicates a "transition" of the step. Further, even if the steps are the same, 400 is called an initial step, and 403 is called an end step, and the flow from the initial step to the end step is called a block.

Multiple blocks can be created, and each block is executed in parallel by being activated.

The block triggered by this activation is called an "active block" as described above, and is executed from the initial step.
Block processing ends at the end step.

By setting the SFC program screen in FIG. 4 to monitor mode, the execution status of the SFC program can be monitored. The active step can be monitored by highlighting the display in (b).

FIG. 5 is a block diagram showing the configuration of a conventional programmable controller monitor device. In the figure, 501
is a CPU that executes various arithmetic processing, and 506 is the above CPU.
The operating system (hereinafter referred to as O8) that controls the 501
507 is a work RAM for O5 that stores a table of information necessary for the monitor, and 504 is an input/output unit that executes data input/output processing with a programmable controller (not shown). The interface 505 is a CR7 display interface, and 505a is a CRT.

FIG. 6 shows the contents of the O8 work RAM 507 shown in FIG. 5. In the figure, 510 indicates whether the block is active or not.
Alternatively, it is an active block table indicating whether it is inactive,
Information about each block is shown in the memory at the address corresponding to the block number. 511 is an active step table that stores step numbers of active steps for each block.

In addition, in FIG. 5, 521 is the microprogram RO
The block activation step N stored in M506
This is active step inversion display means that detects o and displays that step in inversion.

Next, the operation will be explained using the flowchart of FIG. 7 showing the processing routine in the SFC program monitor mode.

In an SFC program, when monitoring the activation steps of a block using a block flowchart (the flowchart shown in Figure 4, hereinafter referred to as SFC diagram), the monitor device displays the SFC diagram of the specified block on the screen, and then displays the SFC diagram of the specified block. Specify the monitor mode for the

When the monitor mode for monitoring the activation steps of blocks is started in the SFC program, the monitor device monitors the specified block No. displayed on the screen for the SFC diagram of the already displayed block. Next, the active step inversion display means 521 displays the active step number of the block. is detected from the active step table 511 shown in FIG. 6, and the step is highlighted (
Step S2). Thereafter, it is determined whether or not to continue the monitor mode (step S3). If it is determined that the monitor mode is to be continued, the process returns to step S2, and the process continues in step S2 until it is determined that the monitor mode is not to be continued.
and step S3 are repeatedly executed. On the other hand, if it is determined not to continue the monitor mode, the series of monitor mode processing operations ends.

In addition, Japanese Patent Application Laid-Open No. 63-1999 discloses a means for reserving a desired screen in advance and automatically selecting and switching the display screen according to a predetermined display program.
There is a publication No.-3222.

[Problem to be solved by the invention]

However, since the conventional programmable controller monitor device is configured as described above, when the SFC program consists of multiple blocks, the SF of the block is
After displaying Diagram C, if you want to monitor active blocks in order to display the monitor, run the monitor for each block and investigate to determine whether the block is an active block or not. Or, it is necessary to monitor a list of blocks, specify an active block, and monitor that block. In addition, extra operations are required to display active blocks on the monitor, and if multiple specific blocks are active. However, there was a problem in that the blocks could not be monitored quickly even if the block was changed.

This invention was made in order to solve the above-mentioned problems, and when a specified block becomes active, the monitor screen of that block is automatically switched to, so that the monitor display of the active block can be quickly displayed. The purpose of this invention is to obtain a monitor device for a programmable controller that realizes the following.

[Means to solve the problem]

The monitor device for a programmable controller according to the present invention includes an active block table indicating whether a block is active or inactive, and a step number of an active step. an active block monitor designation table that indicates whether automatic monitoring is designated for the block;
active step inversion display means for detecting the active step No. of the designated block and displaying the step in reverse video; block activation detection means for detecting that the block has become active; active block monitor designation detection means for detecting whether or not there is an active block monitor.

[Effect]

The active step inversion display means in this invention detects the active step number of the specified block from the active step table in order to monitor the execution state of the designated block, and the block start detection means detects the state change of each block in the active block table. It detects when a block is activated, in other words, when it changes from inactive to active. Further, the active block monitor designation means detects from the active block monitor designation table whether or not the above-mentioned block is designated for automatic monitoring, and if so, switches the block to be monitored. By this operation, when a block designated as automatic monitor is activated, the monitor screen for that block is automatically switched.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a programmable controller monitor device.

In the figure, 101 is a CPU that executes various calculations;
2 is a microprogram ROM that stores a microprogram as O3 that controls the CPU 01;
03 is a work RAM for O3 that stores a table of information necessary for the monitor, and 104 is a programmable controller (
105 is a CR7 display interface, and 105a is a CRT.

FIG. 2 shows the contents of the O8 work RAM 103 shown in FIG. 1, which stores a table of information necessary for monitoring.

In the figure, reference numeral 110 is an active block table indicating whether a block is active or inactive.
The information of each block is shown in the memory at the address corresponding to the block.

Reference numeral 111 is an active step table that stores step numbers of active steps for each block.

Reference numeral 112 is an active block monitor designation table that indicates whether or not automatic monitoring is designated for each block.

In addition, in FIG. 1, 121 is a micro program ROM1.
02, and the active step N of the specified block
122 is also stored in the microprogram ROM 102, and 122 is also stored in the microprogram ROM 102, and 122 is an active step inversion display means that detects the step o and displays the step in inverse video on the screen. Block activation detection means 123 detects a change from active to active, and 123 is also stored in the microprogram ROM 102, and detects whether or not the above block is designated as automatic monitor, and if so, This is active block monitor designation detection means for switching blocks to be monitored.

Next, the operation will be explained using the flowchart of FIG. 3 showing the processing routine in the SFC program monitor mode.

In FIG. 1, CPUl0I is a microprogram R
Operates according to the stored microprogram of OM102,
Necessary data is detected while monitoring each table in the OS work RAM 103 and displayed on the CRT 105a via the CR7 display interface 105.

The user first displays the SFC diagram of the block on the screen on the monitor device, and then specifies the monitor mode for it. At this time, if the block is started by key operation etc., the user can select the block that he wants to automatically display on the monitor. If specified, active block monitor specification is executed.

In the flowchart of FIG. 3, in step 5IO), the monitor device displays the active step of the specified block in step 5IO) in order to lead the specified block floor with respect to the SFC diagram of the already displayed block. The active step is read from the active step table 111 shown in the figure, and the active step is displayed in reverse video on the screen (step S11).

Further, the block activation detection means 122 detects the activation of a block, in other words, the change from inactive to active, by monitoring the state change of each block using the active block table 110 shown in FIG. (Step 51
2).

Furthermore, the active block monitor designation detecting means 123 detects whether or not the activation block has been previously designated as automatic monitor by the user from the active block monitor designation table 112 shown in FIG. ,
The block to be monitored is switched (step 813).

Finally, decide whether to continue with monitor mode or not in step 5.
14) If the process is to be continued, each process from step S11 to step S13 is repeated again.

Thereby, when a block designated as automatic monitor is activated on the monitor of the SFC diagram, it is possible to automatically switch the monitor screen.

On the other hand, if it is determined in step S14 that the monitor mode is not to be continued, the series of monitor mode processing operations ends.

In the above embodiment, the automatic monitor specification for the block monitor was explained, but in addition to the block monitor, the monitor also has a screen that monitors the operating status of the ladder circuit that indicates the operation output of the step. By providing an active step monitor designation table in the same manner as in the example and providing activation detection means for that step, automatic monitoring of the designated step becomes possible.

Further, by coexisting the active block monitor designation table and the active step monitor designation table, it is also possible to automatically monitor the designated step of the designated block.

In addition, in the above embodiment, an automatic monitoring method is adopted so that the screen can quickly shift to the active block monitor screen, but by configuring the conventional method so that active block information can be monitored on the block monitor screen, , it becomes possible to easily switch the monitor screen to a designated active block.

〔Effect of the invention〕

As described above, according to the present invention, an active block monitor specification table is newly provided for monitor display, the user is allowed to specify in advance the activated block that the user wants to automatically monitor, and the block activation detection means and the active block monitor designation detection table are provided. By providing a means to detect the activation of the specified block mentioned above and automatically switch to the monitor screen for that block, by specifying automatic monitor in advance for the active block you want to monitor, it will be automatically activated at the same time as the activation. It is possible to monitor the active blocks and quickly display the active blocks on the monitor.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a monitor device for a programmable controller according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the contents of the RAM 103 shown in FIG. 1, and FIG. 3 is a monitor mode of the present invention. 4 is an explanatory diagram showing an example of an SFC program, FIG. 5 is a block diagram showing the configuration of a conventional programmable controller monitor device, and FIG. An explanatory diagram showing the contents, FIG. 7 is a flowchart showing processing in the monitor mode of a conventional monitor device. In the figure, 101-CPU 102-Micro program ROM 103-, OS work RAM 110-Active block table 11L-m-Active step table 112-Active block monitor specification table 121-m
- Active step inversion display means 122 - Block activation detection means 123 - Active block monitor designation detection means In each figure, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oishi 2: Active block monitor specification table 3 Figure 5 505゜ Figure 4 Figure 6

Claims (1)

[Claims] An active block table indicating whether a block is active or inactive, and a step number of an active step. an active step table that stores the active step number of the designated block; and an active block monitor designation table that indicates whether or not automatic monitoring is designated for the block; active step inversion display means for detecting and displaying the step in reverse; block activation detection means for detecting that the block has become active; and active block detecting whether the block has been designated as automatic monitor. A monitor device for a programmable controller, comprising: monitor designation detection means.