JPH04101297U - display device - Google Patents

Abstract

(57) [Summary] (Purpose) By using the numerical display element that displays the set value of the control parameter as a level indicator,
To enable easy observation of control status. (Structure) A plurality of numeric display elements having a plurality of display segments are arranged side by side, and the plurality of numeric display elements are
It is used for numerically displaying control parameter setting values, and segments arranged in the same row among the display segments of each numerical display element are driven in order according to the control state to also serve as an indicator of the control state.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention can be used, for example, as a monitor device for a motor control circuit. Related to display devices.

0002

[Conventional technology]

For example, conventional motor control circuits are analog control, and the number of control parameters etc. Numerical display elements were not used because they were not suitable for character display. Therefore, control When trying to observe the status, the control-related signals are measured using an observation means such as an oscilloscope. I had to type it in to display it. Figure 10 shows such a conventional analog An example of a monitoring device for a motor control circuit under control is shown.

0003 In FIG. 10, the rotational speed of the motor 15 is detected by the encoder 16, The speed detection circuit 17 converts the speed signal into a predetermined format according to the speed of the motor 15. After that, the subtracter 11 calculates the deviation from the speed command signal. This speed deviation signal is input to the speed control circuit 12 and converted into a current signal according to the speed deviation signal, and the It is input to the flow control circuit 13. The current control circuit 13 controls the inverter according to the current signal. The output frequency of the motor 14 is controlled. The speed of the motor 15 changes according to this output frequency. controlled.

0004

[Problem that the idea aims to solve]

In the conventional example shown in Fig. 10, the control state, for example, the speed and current of the motor, If you want to monitor, pull the speed monitor terminal from the output terminal of speed detection circuit 17. Connect it to an observation means such as an oscilloscope, and also connect it to the output terminal of the speed control circuit 12. Pull out the current monitor terminal from the terminal and connect it to an observation means such as an oscilloscope. Therefore, it is necessary to observe the display on the observation means. Therefore, to monitor the control status, A oscilloscope, pointer-type meter, and other instruments are required for easy observation. The problem is that it is not possible.

[0005] This invention was devised to solve these problems, and the control parameters Use the numerical display element that displays the set value of the data as a level indicator. To provide a display device that allows easy observation of control status. The purpose is to

[0006]

[Means to solve the problem]

In this invention, multiple number display elements each having multiple display segments are arranged side by side. The plurality of numerical display elements are used for numerical display of control parameter setting values. Also, controls the display segments of each numeric display element that are lined up in the same row. It is characterized by being driven in sequence according to the state and serving as an indicator of the control state. Ru.

[0007]

[Effect]

The set control parameters are displayed on the numerical display element by selecting the switch, etc. It can be displayed numerically, and it can also be displayed with multiple numerical display elements arranged side by side. Driving segments that are lined up in the same row in order according to the control state It can be used as an indicator of control status.

[0008]

【Example】

In Figure 1, the command signal input as an analog signal is converted from analog to digital. The signal is converted into a digital signal by the device 1 and input to the microprocessor 2. micro The processor 2 also contains a speed detection signal for the motor 4 from an encoder 5 and a display device. A switch input signal from the station 10 is input. Microprocessor 2 receives each input signal. Perform a predetermined calculation based on the calculation result, and determine the pulse width of the PWM inverter 3 based on the calculation result. The speed of the motor 4 is controlled according to this pulse width.

[0009] The display device 10 includes a plurality of numeric display elements 8 having a plurality of display segments. It has a display unit 6 arranged side by side in the direction, and also allows for mode switching, setting, It has a plurality of switches 7 for resetting, clearing, increasing/decreasing numbers, etc. this A signal corresponding to the operation of the switch 7 is sent to the microprocessor as the switch input signal. input to processor 2. The microprocessor 2 checks the operation status of each switch 7 mentioned above. The signals corresponding to the operation status of each switch 7 are sent to the display device 10 as display signals. input.

0010 FIG. 3 shows an example of each number display element 8, and as is well known, numbers from 0 to 9 are displayed. It has 7 display segments to display numbers, and a decimal point at the bottom right. It has a display segment. 3 rows above and below of 7 segments for numerical display The horizontal segments lined up in The vertical segments lined up are designated as "1" and "2" respectively, and the vertical segments lined up in two rows on the left side are Let the segments in the direction be "5" and "4", respectively. In addition, the display segment of the decimal point above ment is ``7''.

[0011] The control parameters for the motor 4 are changed by selecting the plurality of switches 7 on the display device 10. The microprocessor 2 can set this control parameter. The setting value is input to the display device 10 as a display signal, and the display unit 6 displays it in numbers. It looks like this. In addition, the microprocessor 2 responds to the selection operation of the switch 7. A display signal corresponding to the control state of the motor 4 is input to the display device 10, and the display device 10 Then, according to this display signal, among the display segments of each numeric display element 8, the display segments are arranged in the same column. By sequentially driving the segments, the display unit 6 can be used as an indicator of the control status. It is designed to be used for both purposes. Display section 6 as control status indicator When used, the objects to be displayed include the rotational speed of the motor 4, current, and other arbitrary information, but there are special It is suitable for displaying constantly changing data.

0012 FIG. 2 shows an example of the display according to the above embodiment. As shown in Figure 2(a), the numbers By arranging six display elements 8 horizontally, a six-digit number can be displayed. It's there. Here, it is assumed that each display element 8 is composed of an LED. As shown in FIG. 2(b), the numerical display elements 8 for six digits are turned on in order from the highest digit to LED0, It is assumed that LED1, . . . LED5. In addition, each numeric display element 8 is displayed as an indicator in a controlled state. When used as a meter, the detected speed and current command shall be displayed. and, The detected speed is displayed in the segment “0” of each display element 8 (see Figure 3), and the current command is It is assumed that display is performed using segment "3" (see FIG. 3) of each display element 8. Also, figure As shown in 2(b), regarding the detection speed, 0rpm or more and less than 500rpm is Up to LED0, 500rpm or more and less than 1000rpm up to LED1,...2 At 500 rpm or more, up to LED 5 is displayed, and so on. Regarding the flow command, 0% or more and less than 50% is LED 0, and 50% or more and less than 100%. When it is full, it goes up to LED 1, and when it is over 250%, it goes up to LED 5, and so on. Let them share the burden. Note that the rated current is assumed to be 100% here. Figure 2(c) shows the detection An example of speed and current command display is shown. In this example, for detection speed, the LED Since up to 3 is displayed, the speed must be 1500rpm or more and less than 2000rpm. I see, regarding the current command, it is displayed up to LED1, so it is more than 50% 100%. It can be seen that it is less than %.

[0013] 4 to 6 show the display operation as described above. Figure 4 is for displaying control status. "RTI" means end of interrupt. Figure 4(a) Interrupt processing is performed for current control as shown in Figure 4(b), and speed control is performed as shown in Figure 4(b). Speed control is performed based on the detection signal, interrupt processing is performed regarding this speed control, and In addition, as shown in FIG. 4(c), display processing for the current control state and speed control state Repeat the action constantly.

[0014] Figure 6 shows the timing of such interrupt processing and display processing. The current control process for rotationally driving the motor is given first priority, and the processing time is 125 μsec. The speed control processing, which is the outer loop of the motor control system, is given second priority. This is done at a cycle of 500 μsec. And current control processing Use the remaining time other than the time and speed control processing time to process the display, that is, display the table. It accepts parameters to be displayed. Display processing takes 10msec The period is relatively long, but the period is fast enough for the response of the human eye. ing.

[0015] Next, the control state display operation described above will be explained with reference to FIG. switch When the control status display is selected by the selection operation, etc., the LED0 to LED5 are The registers corresponding to each display segment are cleared, and LED0 to LED5 All displays will be cleared. Next, detect the motor speed and display the speed control status. perform an action. In FIG. 5, "VELO" means detection speed. Here, we set the speed to 50 Divide every 0rpm and set LED0 to LED5 according to the division shown in Figure 2(b). Select the corresponding LED and each display segment of lower-level LEDs in order. ``1'' is set in the register corresponding to ment ``0'' (see Figure 3). . Now, if the rotational speed of the motor is, for example, 1800 rpm, the LEDs 0- “1” is set in the register corresponding to the display segment “0” of LED3, and these The display segment lights up.

[0016] Subsequently, the control current is detected and the current control state is displayed. In Figure 5, “CREF ” means current command. Here, the current command is divided into 50% increments and the current command is divided into 50% increments. ), select LED0 to LED5 in order according to the classification shown in Compatible with each display segment "3" (see Figure 3) of LED and lower LEDs ``1'' is set in the register to be used. Now, the current command is, for example, 65%. If so, the register corresponding to display segment "3" of LED0 and LED1 ``1'' is set on the data, and these display segments light up. Figure 2(c) shows the above The speed control status and current command status are displayed on the display unit 6. .

[0017] According to the embodiment described above, a plurality of number display elements 8 arranged side by side can be controlled. In addition to displaying the numerical value of the parameter settings for general use, the display segment of each numerical display element 8 The control state is controlled by driving the segments lined up in the same row in order according to the control state. Since it is also used as an indicator, it can be used with oscilloscopes, pointer-type meters, and other instruments. The control status can be easily monitored without using any equipment. In particular, the microcontroller In the case of control, the control parameters are included in the software and are usually In many cases, it is not possible to observe this, but according to the example above, it is possible to By inputting the information to the display device 10, the control in the control system of the servo motor driver is displayed. It is effective for these optimal designs because the control status can be visualized.

[0018] The type of control state displayed using the numeric display element is arbitrary. For example, fig. As shown in Fig. 7, the horizontal display segments in the top, middle, and bottom three rows of each numeric display element 8 are Use the speed command amount, position control feedforward amount, and position control amount, respectively. The pulse proportional amount may also be displayed. In addition, as shown in Figure 8, the horizontal direction of the above three stages is Torque command, speed control proportional term, and speed control are displayed using the direction display segments, respectively. An integral term may also be displayed. In addition, one display section consisting of a plurality of number display elements 8 6 can be used to select between the display mode in Figure 7 and the display mode in Figure 8. In that case, as shown in FIG. The display segment 70 is made to emit light, and the second digit display element 8's small By lighting up the several display segments 71, you can tell which display mode is available. You may make a distinction.

[0019] When using a 7-segment element as a numeric display element, the vertical segment The status may also be displayed using . That is, as shown in Figure 3, vertical The two segments "1" and "5" in the direction are lined up horizontally, and the two segments in the vertical direction are Since the segments ``2'' and ``4'' are lined up horizontally, multiple number display elements 8 are arranged horizontally. When arranged side by side, these segments lined up in the same row “1”, “5” or “ The status is displayed using 2 and 4. Figure 9 shows an example of such a display. Although only two types of status can be displayed on one display unit 6, one display Since there are two display segments for each element 8, a more accurate table can be obtained. It has the advantage of being able to demonstrate

[0020] In each of the illustrated embodiments, a plurality of numeric display elements are arranged side by side in the horizontal direction. Even when multiple numeric display elements are arranged vertically, the display by each segment is By changing the range up and down, it can also be used as a status display. Ru.

[0021] In addition, although the illustrated examples all have bar graph-like display formats, Any display mode can be adopted. For example, it is used in tape recorders. It may be in a form such as a peak hold display or a level display, or The movement direction is determined by sequentially driving the segments of each display element along the movement direction of the The direction may also be displayed. Similarly, tape running in a tape recorder It is also possible to display the direction or direction of rotation.

[0022] Depending on the type of data, it may be better to compare and display multiple types of data. Although it may be convenient, as is clear from the illustrated embodiment, multiple types can be displayed on one display. Since it is possible to display the status of various types, it is possible to easily respond to requests for comparative display.

[0023] Numerical display elements are not limited to LEDs, but include fluorescent display tubes and liquid crystal display elements ( LCD) etc. may also be used. In addition, in the case of a light-emitting type numeric display element, each segment The status may be displayed by changing the brightness.

[0024]

[Effect of the idea]

According to the present invention, a plurality of numeric display elements arranged side by side can be used as control parameters. In addition to displaying numerical values for setting values, the display segments of each numerical display element are used in the same column. The segments lined up on top are driven in order according to the control status to act as an indicator of the control status. Because it is used for both purposes, there is no need to use an oscilloscope, pointer type meter, or other instruments. Control status can be easily monitored.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a display device according to the present invention.

FIG. 2 is an operation explanatory diagram showing an example of display according to the embodiment.

FIG. 3 is a front view showing an example of a numeric display element that can be used in the present invention.

FIG. 4 is a flowchart showing the concept of display operation in the above embodiment.

FIG. 5 is a flowchart showing the operation of the above embodiment.

FIG. 6 is a timing chart showing the timing of the display operation shown in FIG. 4;

FIG. 7 is a front view showing another example of the display mode according to the present invention.

FIG. 8 is a front view showing still another example of the display mode according to the present invention.

FIG. 9 is a front view showing still another example of the display mode according to the present invention.

FIG. 10 is a block diagram showing an example of a conventional display device.

[Explanation of symbols]

8 Numerical display element 10 Display device

Claims (1)

[Scope of utility model registration request] 1. A display device for a control circuit, wherein a plurality of number display elements having a plurality of display segments are arranged side by side, and the plural number display elements are used for displaying numbers of control parameter setting values. A display device characterized in that among the display segments of each of the numeric display elements, the segments arranged in the same column are sequentially driven in accordance with the control state and also serve as indicators of the control state.