Shulou(Shulou.com)05/31 Report--

This article mainly introduces the relevant knowledge of "what are the problems related to OrCAD". The editor shows you the operation process through actual cases, and the operation method is simple, fast and practical. I hope this article "what are the problems related to OrCAD" can help you solve the problem.

1. What is FANOUT cabling?

FANOUT cabling: extend pad cabling.

In order to ensure the mounting quality of SMD devices, the principle of not drilling holes in SMD pads is generally followed, so fanout wiring is used to extend a small section of wiring from the pads of SMD devices, and then VIA is placed to punch holes on the pads. In LAYOUT PLUS, AUTO/Fanout/Board is used to implement fanout routing. First, set the parameters of FANOUT. It is necessary to FANOUT the SMD devices on the PCB before automatic routing.

2. Now there are four modules on the top-level diagram. After selecting any module, press the right button to select Descend Hierarchy and then enter the sub-image. Now that the sub-image has been drawn, how to automatically generate PORT in the top-level? Instead of adding PORT on your own? (PORT has been placed for some pins in the subimage)

The PIN pin of the module of the hierarchical circuit diagram should be placed by yourself. Select the module and use the place pin shortcut menu. Automatic should not be possible.

3. I just want to output the gerber file separately without any layer of the board and frame. What should I do?

It is found that in the template that comes with layout, there are some definitions about the frame and size, all in the notes layer. So you can also try to set obstacle type to board outline and obstacle layer to notes separately when setting the board frame. Of course, add a notes layer to the layers dialog box, and then output the notes layer gerber file separately.

4. Hierarchical schematic diagram. Select, right-click, Descend Hierarchy, error occurs: Unable to descend part.?

It is recommended to reset the level and reset the properties.

5. What is the concept of hierarchical schematic diagram?

The hierarchical circuit is to use the frequently used schematic diagram (such as a semi-adder) as a module, which can not only make the design layout simple, but also convenient for other designs to reference.

6. The problem of DEVICE generated by ORCAD

With ORCAD out of the DEVICE file, it only defaults to the PIN connection of the components shown on the schematic, and the PINCOUNT of the suspended PIN in the DEVICE is not counted, and can not determine the number of component PIN (due to the suspension is not displayed), it is easy to make mistakes when doing the package, if there is no DATA SHEET.

How can we avoid this problem? How to display all the PIN of the component in ORCAD?

Does the foot of the schematic have anything to do with the encapsulated foot? Of course, you can't look at the schematic to do the package. Find DATASHEET to build a packaging library.

7. How to change the "NAME" and "NUMBER" font size of PIN, the length of PIN, and the spacing of GRID in ORCAD V9.23?

Pin length: select components right-click, edit part, select pin right mouse button / edit properTIes/shape. The font sizes of name and number are fixed and cannot be modified.

8. How to add new components to orcad?

Method 1: after adding the components to the schematic diagram, ECO to the LAYOUT diagram.

Method 2: use the TOOL--- "COMPONENT---" NEW function to add components directly in the LAYOUTL diagram.

9 、 ERROR: [DRC00031]

Package has same name but different source library

What is the reason for this?

It is possible that two components use the same component serial number. What do I think: the same encapsulation comes from different source connection libraries? )

10. Why are the deleted pins and vital parts deleted together?

Maybe you selected the component and pay attention to see if there is a dotted frame around the component.

11. The handling of copy components in capture

My diagram is copy from other * .DSN diagrams, others only have * .DSN and * .opj files. After copy comes over, I find that neither source library nor source package can be changed in the attributes of part above.

I read the capture file, and it says

CauTIon: An attached schemaTIc folder or other file external to the project or library is not stored with the project or library. If you copy or move the project or library to a new locaTIon, you must also move or copy the attached object to keep them together. In addition, you may need to edit the path to the attached schematic folder or file if you move the project to a new location with a different directory structure.

When copy, there are other attachments that should also be copy together, and then modify the path. I would like to ask, like my current situation, how to do, re-input components one by one modification, or there are other good ways.

No more information can be obtained from the original file of ps,copy.

There is no need to change it. The Netlist information transmitted from schematic to PCB LAYOUT is only PART REFERENCE and PCB FOOTPRINT. All you have to do is change FOOTPRINT NAME. It doesn't matter whether SOURCE LIB and SOURCE PACKAGE can be changed. (note: SOURCE PACKAGE will be used only if the PCB FOOTPRINT item of your component is empty).

12. Is there any quick way to make all the components encapsulated and the values output

The schematic is orcad/capture, plus powerpcb

Use the BOM table output to add {PCB FOOTPRINT} to the COMBINED PROPERTY STRING entry

13. I would like to ask the master, when I draw the circuit diagram, because this circuit diagram is given to me, I want to modify it, but there are no components in the component library. How can I get the components I want more quickly?

I don't want to copy it; it's because this component is not built correctly. If there are some components in this circuit diagram that lack PIN, how can we add them? hurry, thank you first!

Select the component, then right-click and select edit part to modify it.

14. May I ask prawns how to import orcad into powerpcb?

Tools/create netlist/other/padspcb.dll, the output file name suffix can be changed to .asc.

15. Capture DRC appears: Off-Grid Objects

When Off-Grid Objects appears in session log, I look at the help file, but I still don't understand what Off-Grid Objects is.

Reporting Off-Grid Objects

R78-08-POWER/LED/JTAG/CLOCK/OM (177.80, 222.50)

C128-08-POWER/LED/JTAG/CLOCK/OM (93.98,49.53)

C129-08-POWER/LED/JTAG/CLOCK/OM (106.68, 49.53)

R81-08-POWER/LED/JTAG/CLOCK/OM (35.31, 271.78)

F1-08-POWER/LED/JTAG/CLOCK/OM (59.18,38.10)

R75-08-POWER/LED/JTAG/CLOCK/OM (152.40, 208.53)

C121-07-LCD (137.16, 133.48)

When the snap to grid is turned off, the components are not placed according to the grid. So there will be such a hint in statistics.

Is there any way to correct the device of not off-grid?

The solution is to turn this option off during erc

16, CAM output file, why the power and ground layer does not seem to see anything, is not all PCB CAM output like this?

What you can see, it's supposed to be a cross pad.

17. Does anyone know how to convert PADS files into ORCAD files? If so, please give me some advice! ~! Thank you

Export the PADS file to ASC format, and you should be able to import it in ORCAD.

18. When using CAPTURE, I first drew a component and put it on the diagram, and then I went back to the component library to modify it. When I went back to the schematic, I couldn't put the newly modified component on it or use the original one. I think it can be updated! Can you take a look at it?

Click on the component on the schematic, and then right-click to pop up the menu, there is an edit part function, after you go in, you can modify it, and then update current it. I'm sure it can be changed.

19. I finished drawing the schematic diagram with Orcad and want to draw PCB with Powpcb

The question now is how to add the encapsulated library of components in Orcad and let Powpcb know what encapsulation is used.

Are these PCB packages painted in Orcad or in Powpcb? Especially a new package named by oneself.

Encapsulated and painted in POWERPCB. Set the FOOTPRINT of each component in the CAPTURE of ORCAD to be the same as the package name in POWERPCB.

For a detailed introduction, see "using Orcad to make schematic diagram, using PADS layout"

20. I'm going to use ORCAD as the schematic diagram and then make the network table of allegro, but when I added the component library, I found that I could add * .olb and * .lib libraries. What are the occasions when the two libraries are used respectively?

Where can I see the component wrapper library in allegro?

* olb is a graphic symbol library file, that is, a schematic library, and * .lib is a simulation model description library file that uses Spice language to define and describe the graphic symbols in Capture. * .llb is the PCB wrapper library file.

The .lib in olb is the catalog file for the DOS version of Capture

Excuse me, how can the components on the orcad schematic be stored in the designated component library

Select the component point EDIT PARTS and select Save as in the edit window.

22. Ask how the diagram of protel can be converted into what orcad can open.

You need to export PROTEL to an ASCII file first, and then use capture's file-import design. I've used it. It's okay.

23. A device with more pins will be too large to put them in only one diagram when drawing a schematic diagram. I want to draw them with two or three part. How to set them up? how to map them to the same package when generating PCB?

You can specify a package for all three parts of the footprint; for this question, please read Capture CIS's help-"Learn Capture Lesson Menu-" marking Parts

24. One of my part is divided into six parts of U1A~U1F. When editing each part, right-click-- "edit part, there are all parts of U1A, but I want to edit the other parts." May I ask how to solve this problem?

Got it, ctrl+N.

25. After Capture draws the schematic diagram, what method can be used to quickly fill in the device packaging information?

Method 1:

Single page mode: click on the circuit drawing, CtrlA all, menu Edit-Properties, click Parts below, you can encapsulate all the Part definitions

Method 2:

Click the project management window, menu Edit-Broser-Parts, in the list of Part, select the Part you want to set (note that you can use Shift and Ctrl to check), click the menu Edit-Properties, you can quickly fill in the encapsulation information in the form.

26. How to delete the part in cache? Thanks!

You can only delete the redundant part, click Design Cache in the project management window, and then click the menu Design-Clearup Cache.

If you modify the library element, there will be inconsistencies between cache and lib. Update will be fine.

27. I have 12 circuit diagrams, and there are + 12V power supplies in both the 3rd and 10th. Why is there a warning when I check the DRC? Could you tell me how the same power supply on different pages can be connected?

Place power symbol, just change your name to the same thing.

28. I have several schematics, but they are less than one master diagram. I don't know how to generate hierarchical test circuit diagrams from subdiagrams and make them network related! Thank you!

If you want to create a new master plan, you might as well just create a block diagram of the principle in the original dsn file and make it make root. The mashed potato guy above means to ask if there are similar commands in capture (such as protel, which directly uses the create symbol from sheet command) to generate block diagrams.

29. I now have the schematic of ORCAD on hand, and now I want to get the lib from the schematic. Do you heroes have this function in ORCAD? Thank you!

Answer: file-new a library, and then copy the parts in Design catch to library.

30. I drew a schematic diagram of the phone with Orcad, and the Netlist was given to PowerPcb and made into a PCB board, which has been debugged and mass-produced. It means that the electrical characteristics of the schematic are correct! Now there is a problem with BOM, normal BOM (Item Quantity Reference Part Description PCB Footprint Vendor)

No problem, now you need to add a few attributes (such as Manufacturer,Order Number,Part No.). If you EDIT on each component, it will be fine to add the above attributes, but one by one, hundreds of Part, plus dead! I heard that there is a way to import what file, can let all Part add the above attributes, and then I fill in the specific value, a Bom is done. I don't know which warrior can learn from each other and give me some advice!

Solution one: use CIS, but your company doesn't have it yet and can't.

Solution 2: Key in EXCEL without bringing the settings into the schematic, and many companies just do it.

Solution 3: using Update propetry, it's a little complicated, so you can study it by yourself.

31. I want to add the components in the existing schematic to my library. I select a component and right-select edit part, and then save it to my own library, but after saving it, I find that the pin in the library and the original schematic is upside down, the original pin on the left has gone to the right, while the pin on the right has gone to the left, and the numbering of each pin is correct. I don't know why, but where is it wrong?

Answer: you can press V and turn it upside down!

32. I have made some drawings and found that the picture is smaller. I want to make it bigger. I have changed the setting of the view in Options "Design Template, but the size of the drawing has not changed in SCH.

You set it under the interface that didn't open schematic, right? You open a picture first, select options-"schematic page propeties, it should be possible to change it here!"

33. After distributing one page of the schematic to other pages, when exporting the .asc Netlist, there are many of the following warning.

I don't understand.

WARNING: Name contains illegal characters + 5V, changed to PLUS5V

WARNING: Name contains illegal characters powered 5V, changed to DPLUS5V

WARNING: Name contains illegal characters Version Document, changed to Version_Document

ERROR [NET0011] Netlist failed or may be unusable.

There is something wrong with the 5v connection, either your + 5V is not marked with a power supply, or there is no OFFPAGE, depending on the situation.

2, the error is the same as above.

3, the version number has not changed.

4, Netlist cannot be generated.

Just correct these mistakes.

34. In ORCAD, if you want to use a device with a lot of pins, you don't want to use a big picture. You want to divide it into several parts, but you can't try it many times. Who can give me some advice?

After you must create a new component, Parts per Pkg selects the number of components to split, and Package Type selects Heterogeneous.

I wonder if the interface between CAPTURE and ALLEGRO is easy to use, and what problems should I pay attention to?

There are many of my devices in CAPTUE, I do not know how to build the library? Does the hero have good help articles for some, or where can I download electronic documents? And please let me know. I am very grateful.

There is no problem with the interface between Capture and Allegro because they are now a family of their own. There are many tutorials on the Internet. You should be able to find them by searching them.

36. I made a small board with four public plug-ins and four screw holes around it. Now to make a big board, put the small board on it, the female socket is right against the male socket, and the screw holes need to be aligned. I want to put the small board into the big board as a component package, so it is easier to align. Ask how to make this small board into a package? Please give me some advice.

Answer one: you want to make a package, it should not work, I personally think it should be your small board parts into a list file, in the allegro on the right side of the Find by name select its function for symbol or (pin), in the following small box keyin your list file, and in the Find by name alignment function should choose List, should be on OK. Also, you have to transfer Netin to your big board.

Answer 2: when my master overlays several boards, he makes the outer frame and connector of the small board into library components (the frame is made into a component package, and the connector is made into a pad), and then adjusts it to the top of the big board. If it happens to be opposite to the screw hole, delete it, because the size of the board is connected by wiring. This will be very accurate during installation. But he's gone now.

37. When we do sch, is capture cis of great use? In addition, how to mark the tube angle number with letter sequence in the package of BGA?

CIS:Component Imformation System, as for the benefits can not be said at once, mainly for the part library management function of an enterprise, a simple example: you can see all the information of the part (including part number, value, component description, price, company inventory, package shape, component datasheet, etc.) in place part. ), the advantage for engineers is to generate BOM to be done at once, instead of filling in what part number and what information the component describes, mainly reducing the chance of error.

Can't the letter pin just input letters directly to pin?

38, what is the use of the VALUE of ORCAD's PART? one of my colleagues said that the VALUE of different types of devices cannot be the same, because if the same DEVICE is generated, there will be problems, for example-I have a resistance of 33 ohms and a 4-pin resistance of 33 ohms, then in the schematic diagram, the value can not all be written as 33, but as R335033. What is the reason for this? can any hero explain it? thank you.

If the value values of different types of devices are the same, different types of components will be put together when making a device list, as you said above, it will be considered to be two 33 ohms of resistors without distinction.

39. In Capture, you can prepare for the future Aleegro PCB board by setting some properties of Properties. Excuse me: what are such attributes? Especially related to the network, such as differential pair, its name, linewidth, line spacing can be set in advance in one of these attributes, and then brought to the Allegro.

Answer: in edip property, filter by select: Cadence-allegro can see what can be transferred; as for differential pairs, line spacing can only define the name, the specific need to specify the value in the allegro, such as min_line_width can directly define how much.

40. Draw the circuit diagram in a capture, and make a .olb library file for all the components in the diagram. When opening the library separately, it is normal to edit the component. However, if you select a component when using the component Manager in Capture, when you click on the right-click menu, you can't see the figure of the component in the component Manager window (although there are parameters), and prompt: "Coud not read part information form WAG/CAP", indicating that the CAP capacitance information cannot be read.

What's wrong with it? How to set up CIS?

Part Manager is a function of CIS, you did not set up CIS, so you prompted an error! 2-> look at the help file, it's very detailed.

41. I would like to ask you a question: when you check with DRC after drawing in ORCAD CAPTURE, there are two GND errors. One is solved when I connect GND with VSS, and the other doesn't work at all. Or error report: too fewer connector to GND! Could you tell me how to solve it?

Because the gnd or vcc you connect is a contact, there are too few contacts. For example: if one foot of a capacitor is vcc and the other foot is gnd, your current situation will also appear. I wonder if you are like this?

42. How can the same signals of two page in the dsn of a project in orcad be connected together?

Just put a page break, OFF PAGE. Only if the name of the OFF PAGE is the same, but now the net that can't be connected in my two page is not a single-thread net, but the bus can't be connected together. It seems that page off can't connect to the bus.

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