Manager a part

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Transcript Manager a part

Component Data Manager
Last revised 08/10/2005
The Component Data Manager is the tool in ASENT that allows
you to edit and manage part libraries. New parts can be entered
here and existing parts can be modified for projects that the user
has access to. Parts can also be bulk-loaded from Excel
spreadsheets to populate project part libraries.
In the Component Data Manager a part may be defined once in
the library, but it could be referenced many, many times in
various predictions. The Reliability Manager is the tool in
ASENT where a product tree structure is defined, and reliability
predictions are done.
The Component Data Manager manages the static data for parts.
The static data is the information about the part that does not
change regardless of how the part is used. For example, this
would include the quality level, rated temperature, rated power,
rated voltage, etc… Variable part data would pertain to how the
part is used. Here, we would have some of the stress data like
the applied power, applied voltage. Project defaults can be
defined in the Component Data Manager, but otherwise, the
variable part data is entered in the Reliability Manager as part of
the prediction.
A part cannot be added to the product tree
structure or referenced in the Reliability
Manager, until it is first added to a project part
library, with the Component Data Manager.
A Prediction Can Reference Parts From Any Library
When performing a reliability prediction (in the Reliability
Manager) you can reference parts from any project part library,
even if you are not assigned to that project. However, a good
practice is to establish a common part library for your company.
Over time, as this gets built up, it can be a big time saver as
members of your team perform reliability predictions.
Component Data Manager Overview
Component Data Manager Screen Layout
Component Data Manager Data Tabs
Working with the Component Data Manager
This screen shows the
Component Data Manager
with the ‘Parts’ tab selected.
Each of the folders represent a
project part library. These
libraries may have parts or
they may be empty.
The brown folder
indicates that you are not
assigned to that project. In this
case you can use the data or
copy it, but you cannot edit it.
The yellow folder
indicates that you are assigned
to a project. In this case you
have full editing privileges on
this project’s data.
Selecting which projects libraries to view
If there are a lot of projects on your server, you may
not want to see all of them displayed. You can select
just the ones that you want, by clicking on the View |
Projects | Select option.
A list containing all of the
projects will be displayed.
You can use the mouse to
click on the projects that you
are interested in. Be sure and
hold the CTRL key down
when you are selecting more
than one project. When you
have highlighted all of the
projects to be displayed, then
click on the OK button.
Selecting which projects libraries to view
This screen shows what the
project list would look like,
if the user selected to view
only the CLASSPRJ,
DEMOCD_PRJ1 projects.
Notice, that this can be very
helpful sometimes to
eliminate some of the clutter
from the screen, so that you
can focus on just the project
part libraries that you are
working with.
Adding a new part to your library
To add a new part to a project
library, expand the project folder
and find the part type that you
are interested in. Expand the part
type folder to the lowest level
(i.e. For some part types like
resistors and capacitors this will
be down to the style level).
Right-click on the lowest level
and select the Add option.
For Microcircuits, the lowest
level will be the part subtype.
Here, we right-click on Analog
Microcircuit and select the Add
Adding a new part to your library
Once the Add option is selected the data panel
on the right side of the screen will become
active. Here, you must fill in the Part Number,
but all other blank fields are optional. Notice
that some of the data is already filled in. These
are static data defaults that are controlled by the
Default tab. You can change any of these
values by typing over them or selecting new
values from pick lists, if applicable.
The static defaults used when creating new
parts can be modified by selecting the Defaults
tab. When adding new parts, ASENT checks
the active project library for defaults and if
none exist then it checks the COMMON project
library. The COMMON project library is
somewhat special, and it will always contain
default values.
Static Data Default Values
Here, we view the static data
defaults that are defined in the
COMMON project library for a
CWR style Fixed Tantalum
capacitor. If we add a new
CWR style capacitor, ASENT
will look for a default in our
active project first, and if one
does not exist, then it will use
the default defined in the
COMMON project library.
Copying existing parts
Parts can also be created by
copying similar parts from
other project libraries and
then making modifications to
the new part. Here we rightclick on the part that we want
and select the Copy option.
Right-click on the
target part subtype
and select the paste
option to complete
the copy procedure.
Packages Used by Parts
For more information on parts, refer to
the ‘Tips for defining new parts’ section
of the Component Data Manager online
Many parts use the same
packaging, so in ASENT when
you create a part you select the
package that it uses. Most of the
package data is primarily used
when performing a Thermal
Analysis. However, some of the
package information is used by
failure rate prediction models.
For example with MIL-HDBK217 the number of leads, seal
type and whether or not it is
hermetic are important. For most
part types the package
information does not factor into
the failure rate calculation.
Variable Defaults Used For Predictions
One of the most important pieces of data
found in the Component Data Manager
are Variable Defaults. These are the
defaults that the Failure Rate Prediction
uses when variable data (i.e. Applied
voltage, applied power, etc...) is not
supplied by the user.
When variable data is missing, ASENT
first checks for defaults on your active
project, and if none exist, then it will use
the variable defaults defined in the
COMMON project library.
The example above shows the variable defaults that are
defined for Fixed Tantalum capacitors on the
DEMOCD_PRJ project library. The value for Applied
Voltage is set to 10% of what the part’s rated voltage is,
and the Series Resistance is set to 1.
Bulk Loading Parts From Excel
In the \ASENT\DATA directory
there are templates for most major
part types. These are Excel
spreadsheets that the user can fill
in and then import to a project
library in ASENT. Values that are
left blank in the spreadsheet will
be set to the Static Data Defaults
defined in ASENT.
To bulk load data from one of the
ASENT Excel templates, rightclick on your project library and
select the Import Parts option.
Open your ASENT template and
start the import process. Part
numbers that already exist in your
project library will not be
overwritten or modified.
Sample ASENT Excel Template
Here, we show the
ASENT template for
bulk loading
Microcircuits. By
filling in the PN
columns you can
create duplicates of
the same part with
different part numbers.
Sometimes this is
handy if you want a
part listed by both a
company part number,
commercial number,
or MIL number.
Sample ASENT Excel Template
By clicking on the Valid Values
tab of the spreadsheet you can see
a list of valid values for various
fields in the template.
Searching Part Libraries for Parts
ASENT’s Component Data Manager has a
powerful wild-card search capability to help
you quickly locate part data.Searching can be
performed at any level (All libraries, a specific
project library, part type, sub-type, style).
Here, we search all of the libraries by rightclicking on the Parts folder and selecting the
find option.
Here, we enter ‘2N22’ as the string
to search for and tell ASENT to
search the Part Number, Name, and
Description fields for a match. Once
we click the OK button ASENT will
return the results .