JP2000132423A - Debugging system for programmable controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the debugging system for programmable controllers which eliminates the need to insert and extract a cable and replace a program file when programmable controllers are debugged by using one debugging tool. SOLUTION: A debugging system for programmable controllers 1 which starts debugging the programmable controller 1 corresponding to a program by connecting the debugging tool 2 having an RS232C port 6 among a plurality of the programmable controllers 1 connected on a multidrop basis through RS485 ports a RS232C/RS485 transducer 10 and selecting the program corresponding to each programmable controller loaded to an application program 8 on the multiwindow OS of the debugging tool 2 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a programmable controller debug system for simultaneously debugging a control system including a plurality of programmable controllers with a single debug tool.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing a conventional debug system for a programmable controller. In the figure, 1 is a programmable controller,
LCn indicates an individual programmable controller. Reference numeral 2 denotes a debugging tool such as a personal computer for debugging the programmable controller 1, and reference numeral 3 denotes a port of the debugging tool 2, which corresponds to RS422 or RS232C. Reference numeral 4 denotes an application program used for debugging of the debug tool 2, which loads and uses a program file 5 for each specific programmable controller at each time of debugging.

In such a conventional programmable controller debugging system, when debugging the programmable controller 1, as shown in FIG. 2, one debugging tool 2 and one programmable controller 1 are connected one to one. I was Also, only one program file 5 to be debugged is loaded on the application program 4 of the debug tool 2.

[0004]

This has the following disadvantages. Multiple programmable controllers 1
Control system consisting of a single debugging tool 2
(A) It is necessary to change the connection cable between the specific programmable controller 1 to be debugged and the debug tool each time. (B) It is necessary to load the program file 5 of the specific programmable controller 1 to be debugged into the application program 4 of the debug tool 2 each time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. When debugging a plurality of programmable controllers by using a single debugging tool, replacement of a cable or a program file is performed. The purpose is to obtain a debug system for a programmable controller that does not need to be replaced.

[0006]

In a debug system for a programmable controller according to the present invention,
A plurality of programmable controllers multi-drop-connected via a first port, a debugging tool having a second port, and code conversion between a code corresponding to the first port and a code corresponding to the second port The debug tool is connected to the programmable controller via the converter.

The second port of the debugging tool is:
It is an RS232C port. The first port of the programmable controller is an RS485 port. Further, the debug tool loads a program corresponding to each programmable controller.

Further, debugging of the programmable controller is started by selecting a program corresponding to each programmable controller on a debugging tool. The debug tool has a multi-window OS, and programs corresponding to the respective programmable controllers are displayed in independent windows.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-debug system for a programmable controller according to an embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram showing a debug system for a programmable controller according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a programmable controller having an RS485 port constituting a first port, and PLC1 to PLCn denote individual programmable controllers. Reference numeral 2 denotes a debugging tool for debugging the programmable controller 1, and a notebook personal computer or a desktop personal computer having an RS232C port is used. 5 is a program file corresponding to each programmable controller 1; 6 is an RS232C port constituting a second port of the debug tool 2;
Is a multi-window OS of the debug tool 2,
Reference numeral 8 denotes an application program started on the OS 7, and 9 denotes a program file loaded on the application program 8, which is displayed in an independent window.

Reference numeral 10 denotes an RS232C for the debug tool 2.
RS485 for ports and programmable controller 1
RS232C / R that converts code to switch ports
In the S485 converter, the programmable controller 1 and the debug tool 2 are connected via the RS232C / RS485 converter 10. Reference numeral 11 denotes an RS485 line in which n programmable controllers 1 are multidrop-connected via an RS485 port.

In the debug system for a programmable controller according to the embodiment of the present invention, n programmable controllers 1 and one debug tool 2 are connected in multi-drop by the RS485 port of the programmable controller 1. 32 to 3 for RS485 port
Since two line drivers and line receivers can be branched and connected, up to 32 programmable controllers 1 can be theoretically connected.

Since the debug tool 2 normally has only the RS232C port, the RS232C / RS48
5 is connected to the programmable controller 1 having an RS485 port via the converter 10. Debug Tool 2
Uses an OS (operation system) 7 of a multi-window type. The debug application program 8 of the programmable controller 1 is started on the multi-window OS 7 of the debug tool 2.
The program files 9 of the n programmable controllers 1 are stored on the application program 8.
From the program file 5. Each program file 9 is displayed in an independent window. When the operator clicks a window displaying the program of the programmable controller 1 to be debugged with a pointing device such as a mouse, communication between the programmable controller 1 and the debugging tool 2 is established, and the program is read online. Debugging such as / writing / monitoring becomes possible. When debugging another programmable controller 1, by clicking on a window in which the program file 9 of the programmable controller 1 is displayed, the programmable controller 1 to be debugged is instantaneously switched.

[0014]

Since the present invention is configured as described above, it has the following effects. A plurality of programmable controllers multi-drop-connected via a first port, a debugging tool having a second port, and code conversion between a code corresponding to the first port and a code corresponding to the second port Since the debugging tool is connected to the programmable controller via the converter, there is no need to newly connect the programmable controller to be debugged.

The second port of the debugging tool is:
Since it is an RS232C port, an ordinary personal computer can be used as a debugging tool. Further, since the first port of the programmable controller is an RS485 port, many programmable controllers can be connected. Further, since the debug tool loads a program corresponding to each programmable controller, it is not necessary to load the program each time.

Further, since the debugging of the programmable controller is started by selecting a program corresponding to each programmable controller on the debug tool, the target programmable controller can be debugged only by selecting the program.

The debug tool has a multi-window OS, and programs corresponding to the respective programmable controllers are displayed in independent windows, so that a program can be selected by just clicking the program.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a debug system for a programmable controller according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a conventional programmable controller debugging system.

[Explanation of symbols]

1 Programmable controller, 2 debug tool, 5, 9 program file, 6 RS232C
Ports, 8 application programs, 10 RS
232C / RS485 converter, 11 RS485 lines.

Claims (6)

[Claims] A plurality of programmable controllers connected in a multi-drop manner via a first port, a debugging tool having a second port, a code corresponding to the first port, and a code corresponding to the second port. A debug system for a programmable controller, comprising: a converter for performing code conversion, wherein the debug tool is connected to the programmable controller via the converter. 2. The second port of the debug tool is RS
2. The debug system for a programmable controller according to claim 1, wherein the port is a 232C port. 3. The debug system for a programmable controller according to claim 1, wherein the first port of the programmable controller is an RS485 port. 4. The programmable controller debugging system according to claim 1, wherein the debugging tool loads a program corresponding to each programmable controller. 5. The system according to claim 4, wherein the debugging of the programmable controller is started by selecting a program corresponding to each programmable controller on a debugging tool. 6. The programmable controller according to claim 4, wherein the debugging tool has a multi-window OS, and a program corresponding to each programmable controller is displayed in an independent window. Debug system.