JPH0785130A - Method for revising two-terminal component mount diagram - Google Patents

Abstract

PURPOSE:To provide a method for revising a 2-terminal component mount diagram with very less increase in trouble with respect to the method for revising a 2-terminal component mount diagram in which a net number of a net connecting pins of 2-terminal components are replaced in the CAD system. CONSTITUTION:A printed circuit board component mount diagram having a 2-terminal component mount diagram including the 2-terminal component mount direction and number of a net connecting two pins of each 2-terminal component is read in the step S1, a revision diagram in which the net number of the net connecting two pins of each 2-terminal component is replaced is read in the step S2, the 2-terminal component mount diagram of the printed circuit board mount diagram and the revised diagram are compared in the step S3 to detect the net number of the net connecting pints of each 2-terminal component to be revised, the mount direction of the 2-terminal components in the 2-terminal component mount diagram of the printed circuit board component mount diagram is inverted in the step S4 and the net number of the net connecting pints of the 2-terminal components is replaced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a CAD (computer-aided design) system to display a two-terminal component mounting diagram in a printed wiring board component mounting diagram, and a net for connecting pins of the two-terminal component to a net number. The present invention relates to an improvement in a method of changing a two-terminal component mounting diagram, which is changed so that the parts are replaced.

[0002]

2. Description of the Related Art FIG. 2 is a diagram showing a two-terminal component mounting diagram and a modified drawing thereof in a printed wiring board component mounting diagram of one example.
Is a diagram showing the mounting of the two-terminal component of one example and a diagram showing the mounting of the two-terminal component of the conventional example and the embodiment of the present invention after changing the net numbers of the nets connecting the pins of the two-terminal component. (No. 1), FIG. 5 is a diagram showing mounting of the two-terminal component of one example, and a conventional example and an embodiment of the present invention after the net numbers of the nets connecting the pins of the two-terminal component are changed. It is a figure (the 2) which shows mounting of 2 terminal parts.

For example, as shown in FIG. 4A, the pin of pin number 1 of the diode D1 is connected to the net of net number 100 having the attribute of earth G, and the pin of pin number 2 is assigned to the power source P.
Due to a design error or the like, the pin having the pin number 1 is attributed to the net having the power source P of the net number 101, and the pin having the pin number 2 is attributed to the ground G. 5) When changing to connect to the net number 100 net, and as shown in FIG. 5A, between the net number 100 and the net number 102 and between the net number 101 and the net number 103. On the printed wiring board connected by the wiring pattern, the pin of pin number 1 of the diode D1 to the net of the net number 100 of the attribute G, and the pin of the pin number 2 to the net number 101 of the power source P. Connect to the net of
The attribute of the pin of pin number 1 of the diode D2 is earth G
Of the diode D1 due to a design error, etc.
When changing the pin number 1 to the net number 101 having the attribute P and the pin number 2 to the net number 100 having the attribute G, the following steps are performed.

In the CAD system, a printed wiring board component mounting diagram including a component mounting diagram as shown in FIG.
As shown in (B), the net number of the net that connects the pin of pin number 1 of the diode D1 and the net number of the net that connects the pin of pin number 2 are exchanged. When the net number change drawing is input, in the case of FIG. 4 (A), as shown in FIG. 4 (B),
The direction of the diode D1 is the same direction, and the lead wire is connected to the pin of pin number 1 and connected to the net of net number 101,
Net number 100 by connecting the lead wire to the pin number 2
Fig. 5 is a component mounting diagram that gives instructions to connect to
In the case of (A), as shown in FIG.
A wiring pattern between the net 00 and the net number 102 and between the net number 101 and the net number 104 is cut, and between the net number 100 and the net number 104 and the net number 101. And the net of the net number 102 is a component mounting diagram that gives an instruction to connect with a strap line.

[0005]

However, in the conventional method of changing the two-terminal component mounting diagram, it is necessary to connect the lead wire to the pin or cut the wiring pattern and connect the strap wire. There is a problem that it takes a lot of time to mount the two-terminal component.

It is an object of the present invention to provide a method for changing a two-terminal component mounting diagram, in which the number of nets for connecting the pins of a two-terminal component is exchanged, which greatly reduces the labor.

[0007]

FIG. 1 is a flowchart of a two-terminal component mounting diagram changing process according to an embodiment of the present invention. C
In the AD system, when the nets connecting the pins of the two-terminal component are changed in net number, the mounting drawing of the two-terminal component is changed. As shown in FIG. Mounting direction of terminal parts, 2
2 including the number of the net that connects the two pins of the terminal part
A printed wiring board component mounting diagram having a terminal component mounting diagram is read, and in step 2, a modified drawing in which the net numbers of the nets connecting the two pins of the two terminal component are exchanged is read, and in step 3, The corresponding two-terminal component mounting diagram of the printed wiring board component mounting diagram is compared with the modified drawing, and the net number of the net connecting the pins of the corresponding two-terminal component to be changed is detected. The mounting direction of the two-terminal component in the two-terminal component mounting diagram of the board component mounting diagram is reversed, and the nets connecting the pins of the two-terminal component are replaced with the net numbers.

[0008]

According to the present invention, a mounting diagram of a two-terminal component in which the nets for connecting the pins of the two-terminal component are changed to those in which the net numbers are replaced is the mounting direction of the two-terminal component in the mounting diagram of the two-terminal component. And the nets connecting the pins of the two-terminal parts are replaced with the net numbers. Therefore, the changing work is to reverse the mounting direction of the two-terminal parts and connect the pins of the two-terminal parts. It can be assumed that the net numbers have been exchanged, and the increase in time and effort is greatly reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a flowchart of a two-terminal component mounting diagram changing process according to an embodiment of the present invention, and FIG. 3 is a net for connecting pins of a two-terminal component according to an embodiment of the present invention in which net numbers are exchanged. FIG. 6 is a diagram showing a main part of a printed wiring board component mounting diagram, and FIG. 6 is a diagram showing a component mounting direction on CAD of an example.

In FIG. 1, the CAD system has step 1
Then, the printed wiring board component mounting diagram including the two terminal component mounting diagram shown in FIG. 2 (A) is read, and in step 2, the net connecting the pins of the two terminal component shown in FIG. 2 (B) is assigned a net number. When the changed drawing that has been replaced is read, the CAD system, in step 3, shows the two-terminal component mounting drawing shown in FIG. 2A of the printed wiring board component mounting drawing and the changed drawing shown in FIG. 2B. 2 and the net number of the net connecting the pins of the two-terminal component is detected, and in step 4, the component mounting direction of the two-terminal component mounting diagram shown in FIG. The printed wiring board component mounting diagram shown in FIG. 3 in which the nets for connecting the pins of the terminal components are replaced with each other is created and output.

In the CAD system, the number of the component mounting direction is 1 in the horizontal direction and 27 in the right direction as shown in FIG.
The direction rotated 0 degrees is 2, the direction rotated 180 degrees is 3, 9
Since the direction rotated by 0 degrees is indicated by 4, the component mounting directions in FIGS. 2A, 2B and 3 are indicated by using the above numbers.

When the printed wiring board component mounting diagram as described above is obtained, the change work is as shown in FIG.
As shown in FIG. 4C, the mounting direction of the diode D1 may be reversed, and the pin number 1 may be connected to the net number 101 and the pin number 2 may be connected to the net number 100. In the case of (A), the mounting direction of the diode D1 is reversed as shown in FIG.
Since it suffices to connect the pin No. 1 to the net No. 101 and the pin No. 2 to the net No. 100, the change work is slightly increased.

[0013]

As described in detail above, according to the present invention, when the nets connecting the pins of the two-terminal component are replaced with each other in the net number, the printed wiring board component mounting diagram in which the labor is remarkably reduced There is an effect that can be obtained.

[Brief description of drawings]

FIG. 1 is a flowchart of a two-terminal component mounting diagram changing process according to an embodiment of the present invention,

FIG. 2 is a diagram showing a two-terminal component mounting diagram and a modified drawing thereof in the printed wiring board component mounting diagram of one example;

FIG. 3 is a diagram showing a main part of a printed wiring board component mounting diagram in which the nets for connecting the pins of the two-terminal component according to the embodiment of the present invention are exchanged.

FIG. 4 is a diagram showing mounting of a two-terminal component of one example, and a conventional example and a two-terminal component of an embodiment of the present invention after the net numbers for connecting the pins of the two-terminal component are changed. Figure showing the implementation (1),

FIG. 5 is a diagram showing the mounting of the two-terminal component of one example and the two-terminal component of the conventional example and the embodiment of the present invention after the net numbers for the nets connecting the pins of the two-terminal component are changed. Figure showing implementation (part 2),

FIG. 6 is a diagram showing a component mounting direction on CAD in one example.

[Explanation of symbols]

 D1 and D2 are diode part numbers and part symbols, 1 and 2 are pin numbers, and 100 to 104 are net numbers.

Claims (1)

[Claims] 1. A printed wiring board component mounting diagram having a two-terminal component mounting diagram including at least a component mounting direction of the two-terminal component and a net number for connecting two pins of the two-terminal component in the CAD system, and 2. Change the net number connecting the two pins of the terminal part to the changed net number (S1, S2) Read the net connecting the pin of the two terminal part with the changed net number. When changing the mounting diagram of the two-terminal component, the corresponding two-terminal component mounting diagram of the printed wiring board component mounting diagram is compared with the modified drawing, and the net for connecting the pins of the corresponding two-terminal component to be changed is connected. The net number is detected (S3), and the net for reversing the mounting direction of the two-terminal component in the two-terminal component mounting diagram of the printed wiring board component mounting diagram and connecting the pins of the two-terminal component is the net number. The method for changing the two-terminal component mounting diagram is characterized in that the parts are replaced with each other.