JPH01232216A - Measurement data display method for monitor and control system for instrumentation - Google Patents

Abstract

PURPOSE:To display measurement data of the monitor and control system in an easy-to-see state by providing a processor to the display terminal of the monitor and control system. CONSTITUTION:A host computer 3 sends the measurement data of equipment to a CRT display 4 and a processor 6 processes the data into a specific number and digits of a decimal part. Then the processor 6 selects a unit for display in a basic unit table and the measurement data is displayed with the specific effective number, the number of digits, and the selected unit. At this time, when the measurement data is small, a small unit is selected and when the measurement data increases by several digits owing to abnormality occurrence, a smaller unit is selected. Thus, the display units are switched with a little variation in the number of digits of the number to be displayed to cope with whether the measurement data is large or small, thereby displaying the measurement data in the easy-to-see state.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a measurement data display method for an instrumentation monitoring and control system that displays measurement data of equipment managed by a host computer in the instrumentation monitoring and control system. Regarding.

[Conventional technology]

Conventionally, in instrumentation monitoring and control systems for building management facilities, traffic monitoring facilities, etc., when displaying an instrumentation monitoring and control screen such as a power system diagram, as shown in FIG. 5, the system's host computer (1) K! , specify the coordinates of a minute area on the screen of the CRT display (2), place image components such as straight lines and arcs in the specified minute area, and repeat this for each area to create transformers and circuit breakers. It displays instrumentation monitoring and control screens such as power system diagrams consisting of equipment symbols for various equipment such as.

When displaying measurement data sent to the host computer (1) from equipment managed by the host computer (1) on such an instrumentation monitoring and control screen, it is similar to the display of the instrumentation monitoring and control screen described above. Then, the host computer (1) displays the measurement data at a predetermined position on the screen of the CRT display (2).

At this time, taking the measurement data of electric energy as an example, the data of electric energy is displayed as shown in Figure 6, and the unit attached to the measurement data is 1.Usually, in anticipation of large protruding data, the data of electric energy is displayed as shown in Figure 6.
It is fixed to a large unit such as "KWh".

[Problem to be solved by the invention]

However, when the units to be attached to measurement data are fixed in this way, the measurement data of one device is small.

For example, if the amount of electricity is less than I KWh,
In the display as shown in FIG. 6, the numerical value after the decimal point changes, and there is a problem in that it is very difficult to see the amount of change.

In addition, if the display unit is fixed to a small unit, as opposed to the above, if the measurement data suddenly changes by several orders of magnitude due to an abnormality, etc., the number of characters in the displayed data will increase rapidly. The display is undeniably difficult to read.

Therefore, one object of the present invention is to make the display of measurement data in an instrumentation monitoring and control system easier to view.

Means for Solving Problem C] Next, means for achieving the above object will be explained using FIGS. 1 to 3 corresponding to the embodiment.

In other words, C, which is a display terminal of the instrumentation monitoring and control system.
A processor (6) is provided in the RT display (4).

For each unit item such as voltage and power2volume, a basic unit table is prepared in advance in which units are arranged in order of ratio of each unit such as kiloport, milliport, kilowatt, milliwatt, cubic centimeter to standard units such as volt, watt, cubic meter. make.

Measured data such as voltage and power of equipment managed by the host computer (3) is transmitted from the host computer (3) to the CRT display (4), and the processor (6) sets the value of the measured data to a predetermined value. At the same time, the unit to be attached to the measurement data after the calculation process is selected from the basic unit table, and the measurement data is converted into the value of the predetermined number of significant figures. and the selected unit.

[For production]

Therefore, according to the present invention, the host computer (3
), the measurement data of the device is transmitted to the CRT display (4), the value of the measurement data is processed by the processor (6) to a predetermined number of significant figures and decimal digits, and based on the measurement data after the processing, , the unit to be displayed is selected from the basic unit table by the processor (6), and the measurement data is displayed using the value of the predetermined number of significant figures and the selected unit.

At this time, if the measurement data is small, a smaller unit is selected, if the measurement data becomes several orders of magnitude larger due to an abnormality, a larger unit is selected, and conversely, if the measurement data becomes several orders of magnitude smaller, a smaller unit is selected. For example, if there is no protrusion in the measured data, a smaller unit is selected. For example, if there is no protrusion in the measurement data, °Wh" is selected as one display vehicle position, and if there is a protrusion in the measurement data, it is selected as one display vehicle position. When a large "KWh" is selected, the number of digits displayed remains almost the same, but by switching the display unit 9, it corresponds to large or small measurement data, and the display of measurement data is now better than before. It becomes easier to see.

〔Example〕

Next, the present invention will be explained in detail with reference to FIGS. 1 to 4 showing one embodiment thereof.

Figure 1 shows the schematic configuration of the instrumentation monitoring and control system.
3) is the host computer, and (4) is the display terminal C.
The RT display is equipped with a CRT (5), a processor (hereinafter referred to as CPU) (6), and a database (7) in which information necessary for displaying the instrumentation monitoring and control screen is registered.

By the way, as shown in Figure 2 of database (7),
Basic surface N (8), multiple basic video layers (91), (92)
.

..., (9n), in a three-layer format of device information layer αO,
Necessary information is registered and formed, and each of these layers (8), (91) to (91) when forming a power system diagram
), the registration procedure for αQ will be explained below.

First, to explain the information registration in the basic two layers (8), it is necessary to register fixed image elements such as line 9 diagram frames and arrows that connect the equipment symbols of various devices in the power system diagram, and other fixed image elements whose display attributes do not change. Select the device symbol to be registered from the device symbol file of the device, place and register each selected device symbol in the appropriate place on the skeleton consisting of the registered fixed image elements, and add the basic surface to the basic two layers (8). register.

At this time, each device symbol in both basic layers (8) is
Since the display attributes do not change, it is treated as a fixed image element.

Next, when registering video information for each device symbol in the basic two layers (8) described above in the basic video layers (91) to (9n), display color changes, flickers, symbol changes, etc. of each device symbol. Video information for each of the display processing modes classified into one category for each processing mode is registered in a predetermined basic video layer.

Furthermore, for each device symbol registered in both basic layers (8) as the device information layer αO, the device symbol, a string of characters and numbers to represent response data from the device of the device symbol, and the device of the device symbol. In addition to registering display items such as the name, the status name that represents the ON, OFF, etc. status of the device with the device symbol, the measurement value that represents the measurement data of the device with the device symbol, and the unit, and a function identification code item for the header that indicates the processing of the display attributes of the device symbol.

and the device number field provided for each function identification code.

In addition, the database of JIS level 1 or level 2 kanji set and other databases required when actually displaying the instrumentation monitoring and control screen can be used on a CRT display (4
) shall be prepared on the side.

By the way, as shown in Figure 3, as a basic unit table for selecting display units when displaying measurement data, for each unit item such as voltage, power, volume, etc., volts [
Kilovolt (K, V), MiIJ port [mv], kilowatt [KW], milliwatt (mW) for standard units such as V], watt [W], cubic meter [m3], etc.
, cubic centimeter [c! A basic unit table is created in advance by arranging each unit in order of the ratio of each unit, such as R3].

When actually displaying the screen on the CRT display (4), when the screen display of the power system diagram is requested by key operation on the keyboard of the CRT display (4), the %C
A screen display request command is issued from P U (6) to the host computer (3), and the host computer (3)
A request is made for data such as the device status necessary for screen display, and based on this request, the host computer (3) collects the ON/OFF status of each device and measurement data.

Next, while data etc. are being collected by the host computer (3), the basic plane registered in both basic layers (8) of the database (7) is checked by the CPU (6).
T(5) and waits for a reply such as data from the host computer (3).
When a response command for the screen display request command is issued from the CPU (6) and the host computer (3) returns color data, etc., the CPU (6) updates the database based on the reply data from the host computer (3). Necessary video information is selected from the basic video layers (9I) to (9n) in (7), and the two selected video information are combined and displayed on the basic screen displayed on the CRT (5).

Furthermore, when displaying measurement data on the power system diagram displayed as described above, the host computer (3)
RT display (4), host computer (3)
Measured data such as voltage and power of equipment managed by IEE
It can be transmitted in 32-bit floating point representation, and the CPU (
6), the value of the transmitted measurement data is processed into a predetermined number of significant figures and decimal digits designated by the host computer (3).

Then, based on the result of the arithmetic processing, the unit to be displayed as 1 from the basic unit table shown in FIG.
), and the measurement data is transferred to a CRT (5
) is displayed.

Therefore, taking electric energy as an example of measurement data, as shown in FIG. ■ is selected as the unit of measurement, and when the measurement data suddenly increases to the order of KWh, which is several orders of magnitude larger as shown in Figure 4 (b), due to the occurrence of an abnormality, etc.
The B section is selected as the unit to be attached to the display measurement data of the CRT (5), and the number of digits of the display data hardly changes.

On the other hand, if the measurement data becomes several orders of magnitude smaller and suddenly decreases to the order of mWh, mWh is selected as the unit to be attached to the measurement data displayed on the CRT (5), and other measurement data are also A similar display will be made.

In this way, according to the embodiment, the C
This is because the unit to be attached to the measurement data is appropriately selected from the basic unit table by P U (6).

Even if the measured data suddenly changes by several digits due to an abnormality, etc., the number of digits of the displayed data will hardly change, and the display unit will dynamically change in response to the sudden change in the measured data. Compared to the case where the unit of measurement data is displayed fixedly without switching, the display of measurement data becomes much easier to see.

In the above embodiment, the IEEE 32-bit floating point representation method was used as a method of transmitting measurement data from the host computer (3) to the CRT display (4), but the method is not limited to this.
) and CRT display (4), it is of course possible to set a special protocol for transmission.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces effects as described below.

Large amount of measurement data of equipment managed by host computer,
Since the unit to be attached to the measurement data is selected from the basic unit table as appropriate by the processor installed in the display terminal depending on the size, even if the measurement data suddenly changes by several orders of magnitude due to an abnormality .

The number of digits of the displayed data remains the same, but the display unit dynamically switches in response to sudden changes in the measurement data, compared to the conventional case where the measurement data unit is fixedly displayed without switching. hand.

The display of measurement data becomes extremely easy to see.

[Brief explanation of the drawing]

1 to 4 show an embodiment of a method for displaying measurement data of an instrumentation monitoring and control system according to the present invention. Figure 1 is a block diagram of the instrumentation monitoring and control system used in the present invention, Figure 2 is a schematic diagram of the information registration layer of the database, Figure 3 is a diagram showing the basic unit table, Figure 4 (a ), (b) are explanatory diagrams of operation, FIG. 5 and the following drawings show a conventional example, FIG. 5 is a block diagram of an instrumentation monitoring and control system, and FIG. 6 is an illustrative diagram of a measurement data display. (3)...Host computer, (4)...CRT
Display,' (6)...CPU. 3rd 4th mouth (Q) (b) Haruma → iki Seki →

Claims (1)

[Claims] (1) A processor is installed in the display terminal of the instrumentation monitoring and control system, and for each unit item such as voltage, power, volume, etc., it displays kilovolts, millivolts, kilowatts, riwatts, cubic centimeters, etc. for standard units such as volts, watts, cubic meters, etc. A basic unit table is created in advance in which each unit is arranged in the order of the ratio of each unit, and measurement data such as voltage and power of equipment managed by the host computer is transmitted from the host computer to the display terminal, and by the processor, Processing the value of the measurement data to a predetermined number of significant figures and decimal digits, selecting a unit to be attached to the measurement data after calculation from the basic unit table, and converting the measurement data into the predetermined number of significant figures and decimal places. A method for displaying measurement data for an instrumentation monitoring and control system, characterized in that the measurement data is displayed using a value of the number of significant figures and the selected unit.