JPS61294511A - Monitor device for programmable controller - Google Patents

Abstract

PURPOSE:To attain an easy-to-see display for the data of plural bits by displaying with switching the codes for octal, decimal and sexadecimal displays, etc. in addition to the display for each bit when said data of plural bits is monitored. CONSTITUTION:A programmable controller 10 is provided with a processor CPU11, a user program memory 12, a data memory 13, a system program memory 14, an input/output module 15 and a communication interface 16. While a peripheral device 20 contains a CPU21, a system program memory 22, a keyboard 23, a display 24 and a communication interface 25. Then the bit data produced at each stage for storage of instructions, etc. are read out and converted into the prescribed codes. Thus the types of codes to be delivered are specified. In such a way, those data can be changed as necessary into the proper display modes, e.g., an octal, decimal or sexadecimal display, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a monitor device that appropriately converts and displays the internal memory state of a programmable controller.

[Prior Art and its Problems] At the initial stage, so-called programmable controllers were called sequence controllers and were configured to execute only basic sequence control instructions. That is,
This type of sequence controller has been applied to a relatively limited field because it controls a controlled object by programming it with simple instructions suitable for sequence control.

However, in recent years, programmable controllers that can perform numerical calculation functions and data processing functions at high speed have become available at low cost, and the fields of their application are greatly expanding.

Expansion machines that accompany the increasing functionality of these controllers.

An example of a moat is an arithmetic function such as an addition function, where multiple bits of internal memory are treated as one unit (
In other words, it is treated as one piece of data). In other words, these operations leave the multi-bit data in internal memory as binary numbers.

Alternatively, data processing is performed using octal numbers, hexadecimal numbers, and HCD codes as one unit.

However, as shown in FIG. 2, the conventional method of displaying data for calculation targets is to provide a peripheral device with display lamps 4 corresponding to the number of bits that can be monitored simultaneously, and to display whether the display lamps 4 are on or off. The contents of multiple bits were displayed.

Although such a conventional display mode is suitable for monitoring the status of each relay point.

i) There is a limit to the number of bits that can be monitored at the same time; ii) An expression format that is easy for one person to read even when processing decimal numbers as one unit, such as measurement data, or when processing data according to a 1B code. The disadvantage was that the display could not be displayed.

[Objective of the Invention 1] In view of the above-mentioned points, the object of the present invention is to display not only each bit but also octal, decimal, 1B-decimal, etc., when monitoring multiple bits of data. It is an object of the present invention to provide a monitor device for a programmable controller configured to be able to switch and display the codes of the programmable controller.

[Summary of the Invention] As shown in FIG. storage means for storing bit data generated in the storage means; code conversion means for reading data from a specific area of the storage means and converting it into a predetermined code; and selection means for specifying the type of code to be output from the code conversion means. , and display means for displaying the output data of the code conversion means, the display mode can be appropriately switched as necessary.

[Embodiment] FIG. 3 is a block diagram showing an embodiment of the present invention6.
In this figure, 10 is the entire programmable controller, 11 is a processing unit (CPU), 12 is a user program memory, 13 is a data memory, 14 is a system program memory for driving the CPU, 15 is an input/output module, and 18 is a communication unit. It is an interface. Also,
20 is the entire peripheral device, 21 is the CPU.

22 is a system program memory, 23 is a keyboard,
24 is a display, and 25 is a communication interface.

FIG. 4 is a plan view showing the external appearance of the peripheral device 20 shown in FIG. 3. 40 shown in this figure is a connector for connection, 41 is a dot display with 1B digits and 2 lines for displaying alphanumeric characters and kana characters, and 42 is a keyboard.

In this embodiment, by pressing the "book" key and numeric keypad included in the keyboard 42, the data memory 13 is
A specific display example in which data stored at a specific address (see FIG. 3) can be displayed on the display 41 will be described later with reference to FIGS. 8 and 9.

Also included in the keyboard 42 is an "AND" key.

The "OR" key etc. are operation keys for programming sequence control commands that can be executed by the programmable controller. Figure 5 shows these sequence control basic commands, and Figure 6 shows the numerical operation command number data processing. Indicates an extended instruction such as an instruction.The difference between the operation data of the sequence control basic instruction and the extended instruction is that the former is bit-by-bit, whereas the former is bit-by-bit.
The latter consists in being an immediate value or multiple bits.

The programmable controller (hereinafter referred to as P
C) 10 and peripheral device 20 are connected to a connection cable 30 via communication interfaces 1B and 25, respectively.
They are interconnected. In PCIO, the built-in system program is GPU II.
The user program is executed by controlling the user program, and the calculated data that is the result of the execution is sent to the input/output module 15 side via the data memory 13.

In the peripheral device 20, the CPU 21 is controlled by operating the keyboard 23 to call up a system program. As a result, the data memory 13 in the PCIO
The stored data is read from a specific area and displayed on the display 24 in the peripheral device.

As is clear from the external view of the peripheral equipment shown in Figure 4,
Connect the connection cable 30 (see figure t53) to the connection connector 40 to communicate with the PCXO.

FIG. 7 shows an address expression method in a relay area (internal memory) inside the controller. The input/output relay area is an area where the state of an external input/output signal is written. In addition to the input/output relay area, the auxiliary relay/latch relay area is an area used for receiving and passing intermediate results of sequence calculations. The register area is an area used when processing data in bytes.

In order to read a plurality of bits in this internal memory and display their contents, the byte addresses shown in FIG. 7 are specified.

Figure 8 shows an example of address 400 (4000 to 400).
7) is displayed on the display 41, where (A) is a binary number display, (B) is an octal number (hexadecimal number) display, and (C) is a decimal number display. . However, 2
To display decimal numbers, press the “book” key on the keyboard.
To display an octal number (hexadecimal number), press the "zero" key twice, and to display a decimal number, press the "zero" key three times, and then input a specific address using the numeric keypad.

Figure 9 shows the contents of register 9000.
'J, (A) L*2 na display, (B)
(C) is the display mode when displaying in decimal number (hexadecimal).

In the embodiments described so far, the "book" key is used as a dedicated key for code conversion, but it is also possible to instruct code conversion using a combination of other keys (common keys).

"Effects of the Invention" According to the present invention, the bit data generated in each process of sequence control can be converted into an octal number, hexadecimal number, etc. as necessary, so it can be displayed in an easily visible display format. It is possible to realize a monitoring device that performs the following operations.

In particular, even in programmable controllers equipped with extended instructions (numerical calculation instructions, data processing instructions, etc.), multiple bits of data can be converted into binary numbers, octal numbers, decimal numbers, etc.
Since it can be converted into a hexadecimal number or the like and displayed, it is possible to easily check the operation data, immediate value, or operation result of the extended instruction, or to efficiently depack the extended instruction.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the schematic configuration of the present invention, FIG. 2 is a diagram explaining the prior art, FIG. 3 is a block diagram showing an embodiment of unreleased [J], and FIG.
The figure shows the appearance of the peripheral device in this embodiment. Figures 5 and 6 are diagrams showing sequence control basic commands and extended commands that can be executed by the programmable controller. Figure 7 is the address in the internal relay of the programmable controller. A diagram illustrating layout. 8(A) to (CC) and FIG. 9(A) to (C) are diagrams showing display examples of the display device according to this embodiment. 1... Peripheral device. 2... Connector. 3...Display device, 4...Display lamp. 5...Keyboard, 10...Programmable controller, 11.2l-
CPU, 12... knee f--j program memory, 13... data memory, 14.22... system program memory, 15...
・I/O module, IEI, 25...Communication interface. 20...Peripheral device, 23...Keyboard, 24...Display device, 30...Connection cable. 40...Connector for connection, 41...Display unit, 42...Keyboard. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 (A) (B) Figure 8

Claims (1)

[Scope of Claims] 1) A monitor device for a programmable controller that operates according to a group of instructions consisting of sequence control instructions and instructions other than the sequence control instructions, which stores bit data generated at each stage of the storage process or execution process of the group of instructions. storage means; code conversion means for reading data from a specific area of the storage means and converting it into a predetermined code; selection means for specifying the type of code to be output from the code conversion means; and output of the code conversion means. A monitor device comprising display means for displaying data. 2) The specific code in the selection means is designated by pressing a dedicated key arranged on a keyboard of a peripheral device or by pressing another dual-purpose key. Monitor device.