JPH02240516A - Digital panel meter - Google Patents

Abstract

PURPOSE:To easily output data that an external device requires from an output part by providing an input terminal to which request signals for a current value, a maximum value, and a minimum value are inputted and an output means which reads the current value, maximum value, and minimum value out of a storage means according to the request signals and outputs them. CONSTITUTION:Input data are stored in respective memories for the current value, maximum value, and minimum value as data on the current value, maximum value, and minimum value through a processing part and the data are supplied from the respective memories to a display part and the output part. The display part reads the data corresponding to display signals for the current, maximum, and minimum values, which are inputted selectively, out of the memories and displays the data digitally. The output part reads data corresponding to the respective request signals for the current, maximum, and minimum signals, which are inputted selectively to the input terminal, out of the memories and outputs them. Namely, the display part displays the data corresponding to the display signals and the output part outputs the data corresponding to the request signals. The data corresponding to the request signals are displayed from the output part irrespective of data displayed at the display part.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is provided in a factory inspection line or a control panel of a testing device, and displays detection data of a detection device together with processing results such as comparison calculations. Regarding output digital panel meters.

(bl) Conventional technologyDigital panel meters, which are used to check whether the shape and weight of a product are appropriate at the final stage of a production line in a factory, digitally display the data detected by a weight sensor, etc. At the same time, this detected data is compared with a comparison value that has been set and input in advance, and the processing results are displayed digitally.In addition, there are cases where the processed data of the digital panel meter is used to control other devices, and for this reason, the digital panel meter The meter allows processed data to be output from an output section.

In such a conventional digital panel meter, for example, as shown in FIG. Data that matches the current value display signal, maximum value display signal, or minimum value display signal that is temporarily stored in the memory and minimum value memory and selectively input by switch operation etc. is read from the memory and digitally displayed on the display. do. At the same time, the data being displayed is output from the output section to the outside. Therefore, when the current value is displayed on the display section, the current value data is output from the output section, and when the maximum value is displayed, the maximum value data is output, and the minimum value is displayed. If so, the minimum value data will be output.

(C) Problems to be Solved by the Invention The digital panel meter described above may be used in conjunction with an external device such as a sequential controller.
In such a case, it is necessary to output data according to a request signal manually input from the sequential controller. However, in the conventional digital panel meter mentioned above, the data displayed on the display section is output from the output section, so if you want to output the maximum value data, for example, you need to input the maximum value display signal by operating a switch and display it. There was a problem in that the maximum value had to be displayed on the unit, and data in response to a request signal from the internal device could not be easily output. Also, for the same reason, it is not possible to output data that is different from what is displayed on the display, and it is not possible to retrieve the maximum or minimum value data while displaying the current value, which causes problems that do not suit the user's actual situation. there were.

An object of the present invention is to make the output data of the output section independent from the display data of the display section, so that the data requested by the request signal can be output from the output section regardless of the content displayed on the display section. To provide a digital panel meter which can be used in accordance with the actual situation by switching output data without changing display contents, and which can be easily shared with an external device such as a sequential controller.

(d) Means for Solving the Problems The digital panel meter of the present invention includes a storage means for storing the current value, maximum value, and minimum value of the input in the input section, and stores the current value, maximum value, and minimum value of the input in the input section according to the content of the display selection signal. In a digital panel meter that reads the current value, maximum value, or minimum value from the means and displays it on the display, there is an input terminal to which request signals for the current value, maximum value, and minimum value are input, and a signal input to the input terminal. The present invention is characterized by further comprising an output means for reading the current value, maximum value, or minimum value from the storage means and outputting it from the output section in response to a request signal.

(e1 action) To explain the action of this invention with reference to FIG. Data is stored in the memory, and data is supplied from each memory to the display section and output section.The display section corresponds to the current value display signal, maximum value display signal, or minimum value display signal that is selectively input by switch operation, etc. The output section reads data from the memory and outputs it to an external device according to the current value request signal, maximum value request signal, or minimum value request signal that is selectively input to the input terminal. In other words, the display section displays data corresponding to the display signal, and the output section outputs data corresponding to the request signal.Therefore, the output section outputs the request signal regardless of the data displayed on the display section. Data corresponding to the data is output independently.

(f) Embodiment FIGS. 2(A) and 2(B) are a front view and a diagram showing essential parts of the front, respectively, of a digital panel meter which is an embodiment of the present invention.

A five-digit, seven-segment numerical display 2 is provided at the center of the front of the digital panel meter main body 1. A cover 6 is provided below the numerical display 2 with a hinge at the bottom so that the cover 6 can be opened and closed. Inside this cover 6, a data key 7, an enter key 8, a count up key 9, and a cursor key 10 are provided. Furthermore, inside the ill there is a changeover switch 12 and a deep inch 13.
is provided. The changeover switch 12 changes the range of data input from a detection device or the like. Further, the dip switch 13 is a switch for switching between the main operation mode and the preliminary operation mode. This preliminary operation mode includes, for example, a comparison value setting input mode in comparison processing, and the comparison value set in this setting input mode is compared with the input in the main operation mode. data key 7,
The enter key 8, counter up key 9 and cursor key 10 are used to input switch settings in the preliminary operation mode. Further, in the main operation mode, the display contents of the display 2 change in the order of current value → maximum value → minimum value by operating the enter key 8.

The maximum value display lamp 4a is lit while the maximum value is displayed on the display 2, and the minimum value display lamp 4b is lit when the minimum value is displayed on the display 2. Note that none of them lights up when the current value is displayed.

FIG. 3 is a block diagram of the above-mentioned panel meter.A microcomputer 2I provided in the panel meter body 1 receives input data such as detection data from a detection device (not shown) through an input section 14, an amplifier 25 and an A/D converter. The signal is inputted via the device 24. The microcomputer 21 also includes a changeover switch 12, a dip switch 13, and keys 7 to 10.
input data is input. Furthermore, a request signal output from an external device such as a sequential controller (not shown) is input manually from input terminals 3a to 3c. Each of the input terminals 3a to 3c is used as a current value input terminal, a maximum value input terminal, and a minimum value input terminal, and receives a current value request signal (PV REQ), a maximum value request signal (Max REQ), and a maximum value request signal (Max REQ), respectively. A minimum value request signal (Min REQ) is input. A ROM 23 connected to the microcomputer 21 stores a program that defines the operation of the microcomputer 21. In addition, the battery buffer
The AM26 stores comparison values set and input in the preliminary operation mode, calculation results in the main operation mode, and the like.

The microcomputer 21 stores the input data in the register R1.
After being temporarily stored in , the data is outputted to the display 2 and also to the output units 15a to 15c via the game console 20 and the output buffer 22. Maximum value data and minimum value data up to that point are stored in registers R2 and R3. Registers R1 to R3 are arranged in RAM26.

The digital panel meter main body 1 includes a contact output section 15a.

Either the transistor output section 15b or the BCD output section 15C is connected. When the contact output section 15a is connected, control data is output from the output buffer 22 to the relay driver 31, and the relay driver 31 opens and closes the relay contacts based on this control data. When the transistor output section 15b is connected, control data is output from the transistor via the photocoupler 32 through the open collector terminal. In addition, when the BCD output section 15C is connected, the control data is transmitted to the photocoupler 33.
The signal is latched at one end by the latch circuit 34, converted into a BCD code, and outputted from the oven collector terminal.

Furthermore, the microcomputer 21 has a changeover switch 12.
The gain of the amplifier 25 is changed according to the measurement range set by. In addition, the input section 14 includes four input terminals each having an attenuator with a different resistance value.
The gain at the input stage can also be changed by appropriately selecting the terminal to which the input is connected.

In the digital panel meter configured as described above, in the main operation mode, the microcomputer 21 outputs input data as current value data to the display 2, and the display 2 digitally displays this. Further, when a maximum value display signal or a minimum value display signal is input by operating the enter key 8, the maximum value data or minimum value data stored in the register R2 or R3 is read out and outputted to the display 2. The microcomputer 21 constantly compares the input data with the maximum value data and minimum value data of the registers R2 and R3, and when the input data exceeds the maximum value data, the current input data is stored in the register R2 as the maximum value data. do. Furthermore, when the current input data is less than the minimum value data, the current input data is stored in the register R3 as the minimum value data.

When a request signal is input to any of the input terminals 3a to 3C during execution of this main operation mode, the signal interrupt process shown in FIG. 4 is executed. That is, when a current value request signal is input to the current value input terminal 3a, the current value data stored in the register R1 is called and outputted to the AND gate 20 (nl-n3). Also, when the maximum request signal is input to the maximum value input terminal 3b,
Read the maximum value data stored in register R2 and output to AND gate 20 (nl-+n4 to n6)
. Furthermore, when the minimum value request signal is input to the minimum value input terminal 3C, the minimum value data stored in the register R3 is read out and output to the AND gate 20 (n
l→n4→n7゜n8), as shown in FIG. 5, the microcomputer 21 actually receives a request signal and outputs data corresponding to the request signal to the AND gate 20, Approximately 30ms after the input, the valid signal is sent to AND gate 2.
Output to 0. The AND gate 20 outputs the logical product of this data output and the valid signal to the output buffer 22.

This outputs only the stable part of the data to the output section 15a-1.
This is for outputting from 5c.

As described above, according to this embodiment, the display 2 displays the current value display signal, the maximum value display signal, or the minimum value display signal selectively inputted manually by operating the enter key 8. Current value data, maximum value data or minimum value data are supplied.

On the other hand, from the output parts 15a to 15c, input terminals 3a to 3
Current value data, maximum value data, or minimum value data is output according to any one of the current value request signal, maximum value request signal, and minimum value request signal that is alternatively input to any one of C. Therefore, regardless of the data displayed on the display 2, the data required by the external device can be outputted from the output section. Therefore, for example, when outputting data from the output units 15a to 15c to the sequential controller, the data required by the sequential controller can be output by inputting the request signal outputted by the sequential controller to the input terminals 3a to 3C. I can do it. In this case, no matter which request signal for current value data, maximum value data, or minimum value data is manually input from the sequential controller, the enter key 8 is displayed on the display 2.
The data selected by the operation is displayed.

(g) Effects of the Invention According to the present invention, data requested by an external device such as a sequential controller can be easily outputted from the output section. Moreover, since the data can be output independently regardless of the display content of the display unit, there is no need to change the display content when changing the output data, and there is an advantage that the display can be used according to the user's actual situation.

[Brief explanation of drawings]

51 is a diagram showing the operation of the present invention, FIGS. 2(A) and 2(B) are a front view and a diagram showing main parts of the front, respectively, of a digital panel meter which is an embodiment of the present invention, and FIG.
The figure is a block diagram of the digital panel meter, FIG. 4 is a flowchart showing part of the processing procedure of the microcomputer provided in the digital panel meter, and FIG. 5 is a timing chart of output data in the digital panel meter. Further, FIG. 6 is a diagram showing the configuration of a conventional digital panel meter. 1-Digital panel meter main body, 2-Display device, 33-3C-input terminal, 15a-15c-output section, R1-R3-register (storage means). Figure 2 (A) (B)

Claims (1)

[Claims] (1) A storage means is provided for storing each of the current value, maximum value, and minimum value of the input in the input section, and the current value, maximum value, or minimum value is read out from the storage means according to the content of the display selection signal, and the display section reads out the current value, maximum value, or minimum value. In the digital panel meter displayed on the screen, there is an input terminal into which request signals for the current value, maximum value, and minimum value are input, and the current value and maximum value are input from the storage means in accordance with the request signals input to the input terminal. or output means for reading out the minimum value and outputting it from the output section.