JPH09106312A - How to update process control data - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an updating method for online updating of process control data (also called definition data) downloaded (transferred) from a support device (also called engineering device) to a process control device. Regarding

[0002]

2. Description of the Related Art A large amount of definition data created by an engineering device is transferred to a process control device. However, especially when performing an operation test (debugging), the transferred definition data is frequently changed. There are many.

[0003]

As described above, when the definition data is changed from the engineering device, the conventional one has the following problems. 1) When the definition data of the process control device is changed,
It is necessary to follow (rewrite) the changed contents with the definition data in the engineering device by the online data change screen of the engineering device. If this is forgotten, the definition data of the process control device and the definition data in the engineering device will not match.

2) When creating the definition data or changing the online data, the user operates interactively while watching the display screen. Therefore, the definition data creation screen and the online data change screen are prepared. ing. However, since these are separate screens, when the definition data is changed, it is often the case that the user forgets to follow the definition data in the engineering device.
Therefore, an object of the present invention is to eliminate the inconsistency of data by automatically rewriting the definition data in the engineering device when the definition data of the process control device is changed.

[0005]

In order to solve such a problem, in the invention of claim 1, the process control data is created and transferred to the process control device by the support device in an interactive form with the display screen. After that, data is collected at regular intervals from the process control device that controls based on this data by the support device, and when the data is updated online in an interactive form with the display screen, when the data is changed, While the change data is temporarily stored, the data of the process control device is updated, and the update data is read from the process control device by the above-mentioned fixed cycle processing, and this is compared with the data temporarily stored previously, and they match. It is characterized in that the data in the support device is updated only when. According to the invention of claim 1, the display screen for creating the process control data and the display screen for change can be the same screen (invention of claim 2).

That is, when changing the definition data downloaded from the engineering device to the process control device, the changed definition data is temporarily held and stored in the process control device, read from the process control device, and then temporarily held. The definition data of the engineering device is updated only when it is confirmed that they match with each other, thereby eliminating the mismatch of the definition data. In addition,
When changing the definition data, the definition data creation screen can be shared to improve operability.

[0007]

FIG. 1 is a functional block diagram showing an embodiment of the present invention. In the figure, 1 is an engineering device, 2 is an online data change screen, 3 is a process control device, 4 is an online data display buffer, 5 is an online data setting buffer, 6 is a data comparison unit, and 7 is a storage device. .

Online data change will be described below. Therefore, it is assumed that the definition data created by the engineering device 1 has been downloaded to the process control device 3 in advance. First, the definition data in the process control device 3 is stored in the engineering device 1 at regular intervals.
Are collected in the buffer 4 and displayed on the change screen 2.

Here, when data is changed on the change screen 2, this data is temporarily stored in the buffer 5 and transferred to the process controller 3. The transferred change data is stored in the memory in the process control device 3, while being transferred from the process control device 3 to the buffer 4 of the engineering device 1 and displayed on the change screen 2.

Next, the data comparison unit 6 compares the change data temporarily stored in the buffer 5 with the change data stored in the buffer 4. As a result, if the two match, the change data is transferred to the storage device 7 in the engineering device 1 and the data is updated. Further, the comparison result of the change data is notified to the change screen 2, and the execution result for the data change is displayed. In this way, the data changed interactively with the change screen 2 is transferred to the process control device 3
In addition to being sent to the storage device 7 in the engineering device 1, the data is automatically updated.

FIG. 2 is an explanatory diagram of an example of a data creation / change screen. As is clear from the figure, the data creation / modification screen of this embodiment has a mode selection section 11 and a data display section 12.
And a data setting unit 13 and the like. The mode selection unit 11 is about to select whether to create or change (debug) data.

The data display unit 12 is for displaying data according to this mode. In the data creation mode, the data in the storage device 7 in the engineering device 1 is shown, and the data set by the data setting unit 13 is stored. Device 7
Is stored in In the data change mode, the data display unit 12 displays the data in the process control device 3,
The data set by the data setting unit 13 is stored in both the process control device 3 and the storage device 7 in the engineering device 1. In this way, data is created and changed on one screen.

[0013]

According to the present invention, it is possible to avoid forgetting to change the definition data in the engineering device due to operator's carelessness when the definition data is changed online, and the definition data in the process control device can be saved. Since the mismatch can be prevented, there is an advantage that the reliability of the system is improved. Further, if the screens for creating the definition data and changing the definition data are the same, the operability can be improved.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of an example of a data creation / change screen.

[Explanation of symbols]

1 ... Engineering device, 2 ... Online data change screen, 3 ... Process control device, 4 ... Online data display buffer, 5 ... Online data setting buffer,
6 ... Data comparison unit, 7 ... Storage device, 11 ... Mode selection unit, 12 ... Data display unit, 13 ... Data setting unit.

Claims (2)

[Claims] 1. A process control data is created by an assisting device in an interactive mode with a display screen and is transferred to the process control device. Then, the process controller performing control based on this data sends the data at a fixed period by the assisting device. When updating the data online in an interactive manner with the display screen, when the data is changed, the changed data is temporarily stored, while the data of the process control device is updated, The process control data is characterized in that the update data is read from the process control device by the fixed-cycle process, compared with the data temporarily stored in advance, and the data in the support device is updated only when they match. How to update. 2. The process control data updating method according to claim 1, wherein the process control data creation display screen and the change display screen are the same screen.