JP3070296B2 - Process control equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can change the setting of various parameters in a control operation unit by inputting a numerical value from an input device. And a process control device to be displayed.

[0002]

2. Description of the Related Art In a process control apparatus, it is a common practice to monitor various parameters in a control arithmetic unit using a CRT display device of an operation console. In addition, when the user inputs a numerical value of the parameter in the control arithmetic unit from the operation console, this is transmitted to the control arithmetic unit to change the parameter setting, and the parameter is changed on the control arithmetic unit side for some reason. In this case, this is transmitted to the CRT display device and displayed.

In such a process control device, a control operation is performed.
DT in the arithmetic unit_inIs a notation consisting of N bits
It is stored as integer value data in the storage area. On the other hand,
Parameters that are input numerically from the perlator console,
Parameters displayed on a CRT display are usually real numbers.
Value and treated as floating point data. Where luck
The numerical data set by the transferee is F-DT_outAnd this is
What is converted to the parameter in the control operation unit is D
T_inThen, F-DT_outAnd DT _inAre data
Since the data format is different, the same value DT_inIs converted to
Numerical data F-DT_outHas a certain range (= ε)
Will be. Here, ε is DT_inChanged by 1 bit
But F-DT_outHow much should be changed
Given by the difference.

[0004]

As described above, in the conventional process control device, the numerical data F-DT _out set by the driver is transmitted to the control operation unit and converted into the parameter DT _in , and this value is converted to the parameter DT _in. It was sent back to the CRT display and displayed. However, the parameter D of the same value
Since the numerical data F-DT _out to be converted to T _in there is a certain range of epsilon, the ones that appear sent back to numbers and CRT display device which supplied the driver, a mismatch width difference epsilon Can happen. This is very inconvenient for the driver because the input parameters are not reflected on the CRT display device.

The present invention has been made in view of this problem, and when a parameter is changed in accordance with a numerical value input by a driver, a process control in which the input numerical value is reflected on a CRT display device. It is intended to provide a device.

[0006]

In order to achieve the above object, a process control device according to the present invention comprises an input device, a display device, and a control operation unit, and operates parameters of the control operation unit by the input device. A process control device that can be input from the input device, and can display the operation parameter of the control operation unit on the display device as needed, and when the operation parameter is input from the input device, Is stored in the first storage unit, converted into internal data, and the converted data is stored in the second storage unit and transmitted to the control operation unit. When the operation parameters are displayed on the display device, the display contents storage means stores the data in the third storage unit and the fourth storage unit in the form of the data at the time of input and the internal data, respectively. Operating when a parameter is changed by the control operation unit, and
The storage contents of the first storage unit and the fourth storage unit are compared, and if there is data that does not match, the contents of the first and second storage units for the data are compared with the third and fourth storage units. A display change unit for transferring the contents of the first storage unit to the storage unit and displaying the contents of the first storage unit on the display device.

[0007]

When an operation parameter is input from the input device, the input processing means stores the data in the first storage unit F-DT _OUT.
After that, the data is converted into the data format of the control operation unit, and the converted data is stored in the second storage unit DT _out and transmitted to the control operation unit.

The display content storage means, when displaying the operation parameters on the display device, stores the operation parameters in the form of data at the time of input and internal data in a third storage section F-DT.
_out- stored in the _init and fourth storage unit DT _out-init. The display change means operates when a parameter is set in the control operation section, and displays the second storage section and the fourth storage section.
Comparing the storage contents of the storage units, and when there is unmatched data, transferring the contents of the first and second storage units to the third and fourth storage units for the data; The contents of the first storage unit are displayed on the display device.

Therefore, when the operating parameter is changed by the numerical value input by the driver, the input numerical value is directly reflected on the CRT display device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments. FIG. 2 is a block diagram of a process control device according to an embodiment of the present invention. This device is composed of an operation console device 1, a comparison operation device 2, and a control operation unit 3. Here, the operation console device 1 includes an input device and C
It is provided with an RT display device and the like, and is a device that receives numerical input of an operation parameter in the control operation unit 3 and displays a changed operation parameter. Also,
The control operation unit 3 is a unit that controls various processes.

The feature of this device lies in the comparison operation device 2,
It accepts numerical input from an input device, converts this numerical value into the internal format of the control operation unit and sends it to the control operation unit, and changes the display content of the CRT display device in response to a parameter change in the control operation unit. Or perform an action. In order to realize such an operation, the comparison operation device 2 stores a first storage unit F-DT _out for storing a parameter numerical value input in a floating-point format and integer data converted to an internal format of the control operation unit. a second storage unit DT _out that, for the data displayed by the CRT display device, a third storage unit _{F-DT out-init} to store in a data format at the time of input of this, the internal format of the converted A fourth storage unit DT _out-init for storing data.

With respect to the process control device having the above configuration, the operation of the comparison operation device 2 will be described below with reference to the flowchart of FIG. When the user inputs a numerical value of the parameter from the input device, the comparison operation device 2
This data is stored in the first storage unit F-DT _out (step ST1). This numerical value is usually a real numerical value and is stored as floating point data.

Next, the comparison operation device 2 converts the input data into internal format data of the control operation unit 3 and stores it in the second storage unit DT _out (step ST2). This data is, for example, an integer value represented by 16 bits. After the above operation, the comparison operation device 2
Sending data storage unit DT _out of the control operation unit 3 (step ST3), the control arithmetic unit judges whether or not the setting parameter has been successful with 3 side (step ST
4).

If the parameter setting is successful, a response to that effect is returned to the comparison operation device 2. If the parameter setting is successful, the contents of the second storage unit DT _out and the fourth
_Is compared with the contents of the storage unit DT _out-init (step S
T5). The fourth storage unit DT _out-init stores C
The parameters displayed on the RT display device are stored as internal format data.

If the contents of the second storage unit DT _{out and} the contents of the fourth storage unit DT _out-init match, the process ends without doing anything. The value corresponding to the driver's numerical value input stored in the section F-DT _out is displayed on the CRT display device (step ST6).
Therefore, the parameters input by the driver are not reflected on the CRT display device.

[0016] Then, the contents of the second storage unit DT _out transfers to the fourth storage unit DT _out-init, the first storage section F-D
The contents of T _out are transferred to the third storage unit F-DT _out-init (step ST7). The above operation and effect will be confirmed by an example of an alarm level display on the operator console device. Now, the data inside the control operation unit is
It is assumed that the alarm level is 6 bits and the alarm level 0 to 100% is represented by ox0000 to ox0800 in the control operation unit (where ox indicates a hexadecimal number). From this conversion relation, 1 bit of internal data is about 0.05% of numerical value input
, So that the numerical input is, for example, 5
Even if it is set to 0.00%, it may be the same as the internal data when it is set to another numerical value.

In the conventional device, the data sent back from the control operation unit is displayed on the CRT display device.
In the case of the above example, the display content may not be 50.00%, but in the case of the present invention, the display according to the content of the first storage unit is performed, so that the display content is always 50.00%. Becomes In the above description, the operation console device 1 and the comparison operation device 2
Has been described for each one, but the present invention is not limited to this.

FIG. 3 shows an application example of the apparatus shown in FIG. 1, and shows a process control apparatus including n operation console devices and n comparison operation devices 2. In the case of this system, each comparison operation device 2 _-1 ... 2
_-n performs the same operation as in FIGS. 1 and 2, but further includes DT _out-init and F-DT as the fourth and third storage units.
or also to transfer the contents of the _out-init to other comparison operation device, or is adapted to share the DT _out-init and _{F-DT ou t-init} at n number of comparison arithmetic unit.

Therefore, the parameter setting from one operation console device is reflected in other operation console devices, which is useful.

[0020]

As described above, the process control device according to the present invention includes the input processing means, the display content storage means, and the display change means. Since the display according to the contents of the first storage unit that stores the operation parameters is performed, there is no case where the numerical value input by the driver does not match the displayed numerical value.

[Brief description of the drawings]

FIG. 1 is a flowchart for explaining the operation of a process control device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a process control device according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a process control apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 ST1 to ST3 input processing ST4 to ST7 display change processing ST7 display content storage processing

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G05B 1/01 G05B 11/36 G05B 23/02 301

Claims (1)

(57) [Claims] 1. An input device, a display device, and a control operation unit, wherein an operation parameter of the control operation unit can be input from the input device, and an operation parameter of the control operation unit is displayed as needed. A process control device that can be displayed on the device, and when an operation parameter is input from the input device,
Input processing means for storing the data in the first storage unit, converting the data into internal data, storing the converted data in the second storage unit, and transmitting the converted data to the control operation unit; Display content storage means for storing the data in the third storage unit and the fourth storage unit in the form of the data at the time of input and the internal data when displaying the operation parameters of the unit on the display device; It operates when a parameter is changed in the control operation unit, compares the storage contents of the second storage unit and the storage contents of the fourth storage unit. Display change means for transferring the contents of the first and second storage units to the third and fourth storage units and displaying the contents of the first storage unit on the display device. Process control device characterized.