NX Nastran DMAP Programmer's Guide - Kxcad.net

1.5 Instructions
Instructions
A DMAP instruction can be classified as either a module or a statement. A module is
similar to a "macro" function and, in general, processes data blocks as input and/or
output. A module may also have parameters as input and/or output. A statement is
any instruction that is not a module and that does not operate on data blocks.
Modules
A module instruction has the following form: the name of the module followed by a
comma [,] and a list of input data block names separated by commas, a slash [/], a list
of output data block names separated by commas, a slash, and a list of parameter
(variable names or constants) separated by slashes:
module_name ,input_data_block_list /
output_data_block_list /
parameter_list $
The dollar sign [$] is required to terminate the module instruction. The modules are
described in “Detailed Descriptions of DMAP Modules and Statements” on
page 766. Most modules have a prescribed number of inputs, outputs, and
parameters, which are defined in the Module Property List (MPL). The MPL is an
internal NX Nastran table that prescribes the exact format of all modules--the number
of input and output data block lists and the number, type, and default of the
parameters in the parameter list. The MPL can be listed by specifying DIAG 31 in the
Executive Control Section. The position of the data block and parameter names is
critical to the proper execution of the module.
Below is an example using the MPYAD module, which performs the following matrix
operation:
or
[D] = SIGNAB*[A][B] + SIGNC*[C]
[D] = SIGNAB*[A] T [B] + SIGNC*[C]
where [A], [B], [C] and [D] represent matrices, and SIGNAB and SIGNC represent the
sign to be applied to the product and additive matrices, respectively.
The format of the MPYAD module is:
MPYAD , A , B , C / D / T / SIGNAB / SIGNC / PREC / FORM $
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