JPH0523206U - Multi-loop controller - Google Patents

Abstract

(57) [Summary] [Construction] The multi-loop controller of the present invention is provided with display adjustment circuits 8 and 9 which are controlled by the CPU 5 for each of the display devices 1 and 2 of each loop and which change the brightness of the display and the front panel. A key input detection circuit 10 for inputting a signal indicating which loop is requested to be operated to the CPU 5 in response to a key operation on the switch 4 is provided, and the CPU 5, which knows the operation target loop by the signal from this circuit, displays the loop other than the operation target. Is controlled to be kept dark, for example. [Effect] Since only the display of the loop that is selected and operated remains at normal brightness, the operator is aware of the loop currently being operated, and it is easy to handle the operation and display, so avoid erroneous operations. You can As a result, a large number of functions can be superimposed on the front panel switch, so that a more compact and space-saving multi-loop controller can be provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-loop controller for industrial instrumentation.

[0002]

[Prior Art]

 In a panel instrumentation type digital controller that controls multiple loops, the input / output status and control status of multiple loops must always be displayed. In addition, switches that can be controlled from the panel are needed to change the control parameters, set values, output values, and control status. However, since a limited space can be secured on the panel surface, one switch has to provide many functions, which inevitably complicates the operation. Therefore, it becomes difficult to display the panel surface and correspond to the operation, and it is easy to cause an erroneous operation.

[0003]

[Problems to be solved by the device]

 As described above, in the related art, unless the display and operation state are carefully checked, other loops may be erroneously operated, and in the worst case, the plant itself may be destroyed. However, in an emergency or with an unfamiliar operator, the above-mentioned problems are likely to occur.

Therefore, an object of the present invention is to realize a multi-loop controller that makes an operator aware of the loop currently being operated and can avoid an erroneous operation.

[0005]

[Means for Solving the Problems]

 The multi-loop controller of the present invention includes a simultaneous display device in which the display for each of a plurality of loops is simultaneously performed, a front panel switch for selecting a loop and inputting control conditions for the selected loop, and those switches. In a multi-loop controller for controlling multi-loops, which includes a microprocessor for controlling, a display adjustment circuit provided for each display unit of each loop and controlled by the microprocessor to change a display state, A key input detection circuit for inputting to the microprocessor a signal indicating which loop is requested to be operated in response to a loop selection operation by the front panel switch, and an operation target is provided by a signal from the key input detection circuit. The microprocessor that detects the loop decreases the brightness of the display of loops other than the target loop. To maintain that state, and if there is a loop selection operation with the front panel switch, the same operation as above is performed for the newly selected loop.After the key operation with the front panel switch, the key operation is It is characterized by controlling to return the state-changed display to the original normal state after a certain period of time passes without it.

[0006]

[Action]

 In the multi-loop controller of the present invention, when the loop selection operation is performed by the front panel switch, the microprocessor detects the operation request of which loop by the signal from the key input detection circuit and adjusts the display other than the operation target loop. The display state is changed by operating the circuit to make the display darker and the state is maintained, and the control conditions are input. After that, if there is a loop selection operation with the front panel switch, the same operation as above is performed for the newly selected loop, and after the key operation with the front panel switch is completed, a certain time elapses without key operation. , Return the changed display to the normal state. In this way, only the display of the loop that you select and operate remains in normal brightness, and the display of the other loops is dark, so the operator is aware of the loop currently being operated, and it is easy to correspond to the operation and the display. Therefore, erroneous operation can be avoided.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

1A and 1B show a multi-loop controller according to an embodiment of the present invention. FIG. 1A is a perspective view showing the vicinity of the front panel, and FIG. 1B is a block diagram showing an electrical configuration. As shown in FIG. 1 (a), the multi-loop controller includes a simultaneous display device 3 for simultaneously performing display by a plurality of display devices for each loop, such as a first loop display device 1 and a second loop display device 2, for example. A front panel switch 4 for selecting a loop and inputting control conditions for the selected loop is arranged on the front surface of the case, and a microprocessor 5 for controlling these is housed in the case.

In FIG. 1B, 1 is a first loop display device, 6 is a display driver circuit for driving the first loop display device 1, and is connected to a microprocessor 5 via a system bus 11 in series. It is connected. Reference numeral 2 is a second loop display device, and 7 is a display drive circuit for driving the second loop display device 2, which is connected in series to the microprocessor 5 via the system bus 11.

The first loop display 1 is provided with a display adjustment circuit 8 which is connected to the microprocessor 5 via the system bus 11 and is controlled by the microprocessor 5 to change the display state, for example, the brightness. There is. Similarly, the second loop display 2 is provided with a display adjusting circuit 9 which is connected to the microprocessor 5 via the system bus 11 and is controlled by the microprocessor 5 to change the display state, for example, the brightness. ing.

Further, the front panel switch 4 and the key input detection circuit 10 that issues a signal indicating which loop is the operation request in response to a key operation on the front panel switch 4 are connected to the microprocessor 5 via the system bus 11. It is connected to the.

In the multi-loop controller of one embodiment of the present invention configured as described above, when a loop selection operation is performed by the front panel switch 4, as shown in FIG. The microprocessor 5, which detects whether it is an operation request and sends a signal to the microprocessor 5, detects which loop the operation is requested by, and the microprocessor 5 operates the display adjustment circuit other than the operation target loop to change the display state. Change. For example, if the operation target loop is the first loop, the display adjustment circuit 9 of the second loop display 2 is operated to darken the display of the second loop display 2 or the state is turned off. Is maintained, and control conditions and the like are input. After that, if there is a loop selection operation with the front panel switch 4, the same display state changing operation as described above is performed for the newly selected loop, and after the key operation with the front panel switch 4 is completed, there is no key operation. After a certain period of time, the microprocessor 5 sends a signal to the display adjustment circuit of the loop whose state has been changed, and returns the display state of the display unit to the original normal state.

In the multi-loop controller of one embodiment of the present invention, only the display of the loop requested to be operated remains at the normal brightness, and the displays of the other loops are dark, so that the operator is aware of the loop currently being operated. Since the correspondence between the operation and the display is easy, erroneous operation can be avoided. As a result, many functions can be overlaid on the front panel switch, and a more compact and space-saving multi-loop controller can be provided.

As a mode of changing the display state in the present invention, the same effect can be obtained by making the display blink at a high speed in addition to making the display brightness darker or turning off the display. Also, the blinking of this display can be performed only by software.

[0015]

[Effect of the device]

 As described in detail above, according to the present invention, a simultaneous display device for displaying a plurality of loops at the same time and a front panel for selecting a loop and inputting a control condition for the selected loop and the like are provided. In a multi-loop controller that includes switches and a microprocessor that controls them, and a multi-loop controller that controls multi-loops, a display adjustment circuit that is controlled by the microprocessor for each display of each loop and that changes the display state is provided. A key input detection circuit for inputting a signal indicating which loop is the operation request to the microprocessor according to the key operation on the front panel switch is provided, and the operation target loop is detected by the signal from the key input detection circuit. The microprocessor changes the status such as reducing the brightness of the display of loops other than the target loop Then, if there is a loop selection operation with the front panel switch, the same operation as above is performed for the newly selected loop, and after the key operation on the front panel switch is completed, the key operation is When a certain period of time elapses without any operation, the display whose state has been changed is returned to the original normal state, so that only the display of the loop for selecting and operating remains at normal brightness, and the operator is currently operating. It is possible to avoid erroneous operation because it is easy to handle the operation and display while being aware of the loop that is being performed. As a result, many functions can be overlaid on the front panel switch, providing a more compact and space-saving multi-loop controller.

[Brief description of drawings]

1 shows a multi-loop controller according to an embodiment of the present invention, FIG. 1 (a) is a perspective view showing a front panel and its surroundings, and FIG. 1 (b) is a block diagram showing an electrical configuration.

FIG. 2 is a flowchart showing a process in the multi-loop controller of FIGS. 1 (a) and 1 (b).

[Explanation of symbols]

 1 ... 1st loop indicator 2 ... 2nd loop indicator 3 ... Simultaneous indicator 4 ... Front panel switch 5 ... Microprocessor 6 ... Display driver circuit 7 ... Display driver circuit 8 ... Display adjustment circuit 9 ... Display Adjustment circuit 10 ... Key input detection circuit 11 ... System bus

Claims (1)

[Scope of utility model registration request] 1. A simultaneous display device for simultaneously displaying by a display device for each of a plurality of loops, a front panel switch for selecting a loop and inputting control conditions for the selected loop, and a microprocessor for controlling them. In a multi-loop controller for controlling multi-loops, a display adjustment circuit provided for each display unit of each loop to change a display state under the control of the microprocessor, and a loop in the front panel switch. A key input detection circuit for inputting a signal indicating which loop is an operation request to the microprocessor according to a selection operation is provided, and the microprocessor detecting the operation target loop by the signal from the key input detection circuit is the operation target loop. Change the state of the loop display other than the above to maintain that state, and A multi-loop controller characterized in that, after the key operation with the switch is finished, the display whose state has been changed is returned to the original normal state after a certain time has passed without any key operation.