JPS60189796A - Display unit for controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a display device for a controller that displays control information of a loop controller for instrumentation control in liquid crystal graphics via a microcomputer.

[Technical background of the invention and its problems]

Figure $1 shows the configuration of a general system in which a controller display device is used.

Figure 1 shows an example of the case in which the pump discharge flow rate is controlled (=applied).The discharge flow rate of one pump 1 is controlled by the flow rate needle 2,
Detected as direct Pv.

Loop controller (hereinafter referred to as controller) manually inputs the three-valued Pv, compares it with a preset setting value Sv, and outputs a command to increase or decrease the rotational speed of the pump 1 so that Pv matches Sv (D).

The increase/decrease command is given by the MV holding device d4 (2 people), the previous operation amount MVI = is added and the current operation n is output as pump 1 (2), and the controller 3 (2 MV
It is input as a feedback value, and further (second display device 5
light is shown.

The display device 5 displays the above Mv, pv, and sv, and
Outputs Sv setting increase/decrease command and indigo manual increase/decrease command.

In this case, setting of Sv is possible when the control mode of the controller is automatic (hereinafter referred to as A mode), and manual increase or decrease of MV is possible when the control mode of the controller is manual (hereinafter referred to as M mode).

In addition, there is a C mode which is controlled in cascade from a higher level loop if necessary, and switching operations between these C/A/M modes are also performed on the display device 5.

FIG. 2 is an equipment layout diagram showing the conventional configuration of the display device 5. υ, 21.22 are L for displaying sv and pv, respectively.
ED par display, 23a, 23b, 23c are changeover light indicator switches for control modes C, A, and Ml, respectively; Z4a, 24b are SV setting increase and change switches;
5 is MY IJD light indicator, 26a and 26b are MY
27 is an alarm indicator lamp.

Although sv and pv are shown as bar light indicators in FIG. 2, they can also be displayed numerically using 7-segment LEDs.

Conventional display devices like the one shown in Figure 2 (=) above display data either as a bar light or as a numerical display, and only show the current value and do not display past data. In addition, there is a problem in that it is difficult to maintain in the event of an abnormality, and it lacks flexibility in practical terms, such as the inability to change the light display range.

[Purpose of the invention]

The present invention uses liquid crystal graphics to display data in chronological order (=display method can be arbitrarily selected), which improves operability (and is also advantageous in terms of maintenance). The purpose is to provide a rational controller optical display device.

[Summary of the invention]

The present invention is equipped with a display panel (liquid crystal graphic display) and a keyboard (-), and also has a built-in microcomputer that selects the display method of the liquid crystal graphic light indicator according to the operation port of the keyboard, thereby expanding the display function. It is a controller display device with increased display flexibility.

[Embodiments of the invention]

An example of the present invention is shown in FIGS. 3 and 4.

FIG. 3 is a block diagram showing the functional configuration of the display device, and FIG. 4 is a diagram showing the arrangement of instruments on the display surface.

Figure 3 (= MPU (microprocessor)
31 executes the program in the ROM 32, and the PV input via the A/D converter and the operation signal of the keyboard 42 input via the DI (digital input circuit) 36 are stored in the RAM 33. Calculated.

LCD (g, crystal graphic display) 41 is LCD-
It is driven via an interface circuit 37 to perform the required light display.

Increasing/decreasing commands in each C/A/M mode to the MY holding device 4 are given via Do (digital output circuit) A.

Information exchange with the controller 3 is performed via a DIR-I/F (transmission interface circuit) 39.

The keyboard 42 has two configurations, for example, as shown in FIG. 4, and various functions can be commanded by a combination of the FUN key and the numeric keys O to 9.

Also, to increase or decrease the setting values of SV and MY, press the Sv key, M
This is done using the V key, ↑ key, and J/ key.

Switching between C/A/M modes is possible by pressing the C key, A key, and M key.

The F key is used when changing the increase/decrease speed (=press at the same time as the ↑ key or ↓ key. CL is the clear key.

Examples of the light display on the LCD 41 are shown in FIGS. 5(A) to 5(E).

Figure 5 (A) shows BY and PV as bars, Figure 5 (CB) shows numerical values, and Figure 5 (C) includes past data in time series (two-curved light). Figure 5 (D)
is an e-pupil display of control parameters, Fig. 5 ([3)
The alarm contents are displayed in chronological order.The above display methods are as described above.C2 can be arbitrarily selected by combining the FUN key and the numeric keys θ to 9.

〔Effect of the invention〕

As explained above (according to the present invention), a liquid crystal graphic light indicator and a keyboard are installed on the panel surface (2 devices), and a corresponding light display method is arbitrarily selected and displayed via a microprocessor. (=Thus, a flexible controller display device with expanded display functions can be obtained.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the general configuration of a fermentation system in which the display device of the present invention is used, and FIG. 2 is a diagram showing an example of a conventional optical display device.
FIG. 3 is a functional block diagram showing one embodiment of the present invention;
The figure is a display operation view, and FIGS. 5(A) to 5(E) are diagrams showing various display graphics in the present invention. 1 Pump 2 Flow rate needle 3 Loop controller 4 MV holding device 5 Display device 41 Liquid crystal Graphic display 42 Keyboard (8733) Agent Patent attorney Yoshiaki Inomata (and 1 others)
Figure 3 Figure 5 (7)) (E)

Claims (1)

[Claims] The display screen is equipped with a liquid crystal graphic display and a keyboard, and a microcomputer that selects the display method of the liquid crystal graphic display according to the operation of the keyboard.
A controller display device characterized by having a built-in display.