JPS60176105A - Program loader - Google Patents

Abstract

PURPOSE:To attain ease of maintenance of a program by handling an external input/output data and a data memory used in a program in a symbolic form so as to make debugging of the program and diagnosis of the system efficient thereby displaying comments on a list. CONSTITUTION:A ROM3 stores an execution program and a microprocessor 1 executes the entire control of a program loader according to a control program of the ROM3. A RAM2 is provided with a number index table, a number table, a symbol index table and a symbol table corresponding thereto. The ROM3 is provided with a means retrieving an operand number of a sequence program or a corresponding symbol from a number inputted by a key and a means retrieving a corresponding number from the symbol displayed on a display 7 or the symbol inputted by a key. Thus, a part of a program of the programmable controller is displayed by using the symbol.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a program loader used as a programming and maintenance support tool for programmable controllers.

[Technical background of the invention and its problems] Programming of a programmable controller (hereinafter referred to as a controller) is generally performed using a program loader (hereinafter referred to as a loader).

When a controller becomes large-scale, the loader serves as its machine interface for programming, debugging,
It is also used as a support tool for monitoring, diagnosis, etc.

A controller generally has a program memory that stores programs, a data memory that stores calculation results and data, an input section that takes in input information from the outside, an arithmetic control section that performs calculations using input information and memory data, and a calculation control section that performs calculations using the input information and memory data. It includes an output section for outputting data and an interface section for exchanging information with the loader.

The support functions of the loader are as follows:

(1) Monitor function Monitors the program execution status of the controller, data memory, and input/output section data in real time and displays them on the A-DA display.

1a Niprogram Monitor Since a sequence program is generally expressed as a ladder diagram, the live line status of the sequence is displayed in high brightness or in color on the display. In the case of numerical calculations, the contents of the data memory and the calculation results are displayed as numerical values.

lb: Data monitor Data memory and input/output data are handled in the form of bits and words (single length 1, double length, # moving decimal point), so these data are monitored, converted to their respective data types, and displayed on the display. indicate.

(2) Programming function The loader of a high-performance controller usually allows programs to be created and edited independently using the loader's keyboard and display. The ladder diagram on the display is compiled into controller object code and saved to controller loading or external storage.

(8) Debug support function For medium-sized or larger controllers, the number of programs.

As input/output data and data memory increase, a reference list is created as a depacking support function.

It has functions such as creating data maps. In other words, the program's object code is searched and a list of how to use the data is displayed on the display. This allows you to check the addresses of data referenced by the program and how to use the data all at once.

(4) Controller control and various parameter settings - Execution of the controller from the loader (operation, start/stop).

(output hold, error stop, etc.). sequence·
Since the program is executed by scanning at a predetermined cycle, various parameters related to the execution cycle and controller operation must be set. In the above programming and various support functions, the data address that becomes the operand of the relay sequence has a physical A number (hereinafter referred to as number) is used.

Since the number has a one-to-one (two-to-one) correspondence with the data address, the address on the loader is treated as m years, and the program can be compiled by unique conversion.

However, with medium-sized or larger controllers, the data area, number of input/output points, and number of program steps used increase, so if you handle data memory or external input/output data using only numbers, it will be difficult to decipher the correspondence between number 1 and program control. There is also the problem that the signal names of external control processes cannot be determined directly.In addition, in programmable controllers, as in general computers, the roles and meanings of data memory and external input/output data handled by programs are explained in the form of comments. It is important to register the program in order to debug and maintain the program.

[Objective of the Invention] The present invention handles data memory and external input/output data handled by a program in a symbol format, thereby efficiently debugging the program and diagnosing the system, and displaying a list of comments for program maintenance. The purpose is to provide a programmable controller program loader that is easy to use and streamlined.

[Summary of the Invention] The present invention comprises a ROM that stores an execution program, a microprocessor that executes according to the program in the ROM, a RAM that stores data and execution results, a keyboard for inputting commands from an operator, a display that displays execution results, In the program loader of the programmable controller, which is equipped with an ink7ace that exchanges information with the programmable controller to be programmed, and an external memory that stores the program and data to be loaded into the programmable controller, In addition to providing a number index table and a number table and a symbol index table and a symbol table corresponding thereto, a means for searching a corresponding symbol from an operand number of a sequence program or a number entered manually by a key in a ROM, and a means for searching a corresponding symbol from an operand number of a sequence program or a number manually entered by a key, and a number displayed on a display device are provided. A means is provided to search for a corresponding number from a symbol or a manually entered symbol, thereby displaying at least a part of the program of a programmable controller as a symbol to facilitate program creation and depacking and improve maintainability. It was measured.

[Embodiment of the Invention] FIG. 1 is a block diagram of a program rotor showing an embodiment of the present invention.

In Figure 1, there are 16 microprocessors and 1 (
The entire program loader is controlled according to the control program stored in the OM (1;!l'l constant memory) 3.

Reference numeral 2 denotes a RAM that stores working data of the microprocessor 1, a stack, a number index table, a symbol index table, a number table, a symbol table, etc. to be described later, and a ROM that stores an execution program of a 3-digit program loader.

Reference numeral 4 denotes an external memory controller, which loads and reads data into and from the external memory 5 based on commands from the microprocessor 1. A floppy disk is often used as the external memory 5.

A CRT display controller 6 displays display data written from the microprocessor 1 on the CRT display 7. It is an 8-digit keyboard controller, holds input data from the keyboard 9, and controls data convolution to the microprocessor 1.

Program keys used for creating and editing programs are arranged on the keyboard 9. A data transmission device 10 transmits data between the controller to be loaded and the program loader. Further, 1-1 is a memory bus of the microprocessor 1, and 1-2 is an address and control path.

Next, Fig. 2 shows the configuration of the functional blocks of the ROM 3 in Fig. 1.

In FIG. 2, 3-1 is an execution control block, which controls the execution of the entire program loader based on commands from the key manual control block 3-2.

The key manual control block 3-2 inputs data from the keyboard 9 and outputs backing control block 3-IH data.

3-3 is a program monitor block that monitors the program execution status of the controller in real time, and monitors the relay sequence on/off status and numerical calculation results QC.
It is displayed on the RT display 7.

3-4 is a data monitor block which monitors the contents of the data memory of the controller input from the keyboard 9 in real time and displays it on the CRT display 7.

3-5 is a program creation/editing block which creates a program by inputting from the keyboard 9 and stores the created program in the external memory 5. Furthermore, a previously stored program can be re-collected and re-stored.

Reference numeral 3-6 is a comment list creation block, which extracts the corresponding comments from the external memory 5 based on the symbol or symbol inputted from the keyboard 9 and displays them as a list on the CRT display 7.

3-7 is a controller control and parameter setting block which controls the controller based on commands from the keyboard 9 and sets various parameters necessary for execution of the controller.

3-81d This is a sequence program load, record, and comparison block that loads the sequence program stored in the external memory 5 to the controller, records the controller's sequence program to the external memory, and also records the sequence between the controller and external memory. Compare programs, find discrepancies and CR
Displayed on T display 7.

3-9.3-River are the II'f check accumulation block and symbol search block, respectively, which perform the operation of finding a number from a given symbol or vice versa.

3-11 is a data transmission block that writes and reads data between the controller and the loader.

Reference numeral 3-12 is an external memory control block, which performs reading and writing of external memory.

3-13 is a CRT display block which converts the given data into a CRT display format and displays it on the CRT display 7.

The functional blocks 3-3 to 3-7 and 3-9 to 3-13 are coupled via corresponding signal lines a to e, as shown in FIG.

Figure 3 (5), (B) +' (1-), (1)
) shows an example of data 4Wm in RAM2 in FIG. 1, 2-1 is a symbol index table, 2
-2 is a symbol table, 2-3 is a number index table, and 2-4 is a number table.

In the symbol index table 2-1, symbol indexes 2-1-3 are created as many as the number of symbols that can be registered. 2-1-1 is a flag indicating that the entry is in use; 2
-1-2 is a flag indicating that the symbol corresponding to the - sign is +r=.

Symbols corresponding to numbers are registered in the symbol table 2-2, and 0 gives the symbol corresponding to the number N specified by the symbol index.Similarly, the number index table 2-3 gives the symbol corresponding to the number N specified by the symbol index. It searches for numbers, 2-3-
1 is a flag indicating whether there is a number corresponding to the symbol, 2
-3-2 is a flag indicating whether the given symbol is registered or not, and the corresponding number from the general number index I specified by number index 2-3-3 is given by number table 2-4. .

Next, bg 4 IA is the object code of the sequence program, which consists of general (-1 instruction, Uobe code 2-5-aL and operand 2-5-2,
The operand contains the address of data memory or external input/output data.

FIG. 5 shows an example of displaying a sequence program using symbols, in which a corresponding symbol is extracted from the symbol index table 2-1 and the symbol table 2-2 based on the address 2-5-2, and the corresponding symbol is extracted from the symbol index table 2-1 and the symbol table 2-2 with the number 7-1- 1
and symbols 7-1-2 are used together to display on the CRT display 7.0 Figure 6 is a display example of the data monitor, and the monitor data 7
-2 as symbol (NAME) 7-2-1° number (N
o, ) 7-2-2 kJcUf-1 value (VALLI
H) 7-2-3 is displayed correspondingly.

When specified from the symbol, the corresponding number is extracted from the number index table 2-3 and the number table 2-4, and the number data is sent to the controller by the data transmission device f#,
Access via ltl and CI? T display 7
to be displayed.

Figure 7 shows an example of displaying comments, with the number (NO,) 7-3-1 and symbol (N
AME) 7-3-2 and comments (COMMhiN
T) 7-3-3 is displayed correspondingly.

Comment) 7-3-1j Blade with a lot of data Usually stored in external memory 5, symbol index 2-1
-3.

[Effects of the Invention] As explained above, the program loader of the present invention
For example, the operand portion of a sequence program can be displayed on a CRT display as an I symbol and a corresponding symbol, so that the program status and input conditions for each control signal can be read at a glance.

Therefore, programs can be created and depacked efficiently.

Furthermore, since the comments of the symbols can be displayed in correspondence with the numbers, the meanings of the symbols and numbers can be easily understood, which is advantageous for improving maintainability.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing an embodiment of the program loader according to the present invention, Figure 2 is a functional block diagram of the ROM in Figure 1, Figure 3 (5), (B), (C),
0)) t, respectively regarding symbols and numbers.
Figure 4 is a data structure diagram of the object code of a sequence program, Figure 5 is a diagram showing an example of displaying a range program using numbers and symbols, and Figures 6 and 7 are data structure diagrams, respectively. FIG. 3 is a diagram showing an example of display of a monitor and a comment list. 1...Microprocessor 2...RAM3...
ROM 4...External memory controller 5...External memory 6...CRT display controller 7...CH
T-display 8...Keyboard controller 9...Keyboard IO...Data transmission controller agent Patent attorney Ino Akira Membrane (and 1 other person) Figure 1 Figure 2 Figure 3-/ Figure 4 Figure 5 Figure 7-1 7-t-z '7-t-t

Claims (1)

[Scope of Claims] (1) A microprocessor that executes an execution program according to a program stored in an ROJ ROM, a RAM that stores data and execution results, a keyboard that inputs commands from an operator, and a display that displays execution results;
In a program loader for a programmable controller that is equipped with an interface for exchanging information with the programmable controller to be programmed and an external memory for storing programs and data to be loaded into the programmable controller, an index table is stored in the RAM. and a contest number table, a symbol index table and a symbol table corresponding thereto, and a means for searching the corresponding symbol from the number manually entered in the operand or key of the sequence program in the ROM, and a symbol displayed on the display device. Alternatively, a program loader is provided with a means for searching a corresponding number from a symbol manually entered by a key, and displays at least a part of a program of a programmable controller as a symbol. (2) The program loader according to claim 1, wherein the RAM and external memory are accessed using symbols and the data values thereof are displayed. (8) Above i5 Claims i1 J&
14 Self-loaded program loader.