Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 554)

L-force | PLC Designer
Siemens Import
552 DMS 3.2 EN 02/2011 TD29
15 Siemens Import
In the 'Project' 'Siemens Import' submenu, you will find commands which allow you to
import POUs and variables from Siemens STEP5 files. The command "Import from a
SEQ symbol file" allows you to import global variables from STEP5 symbol files. Run
this command before either the command 'Import from a S5 project file' so that
readable symbol names can be created when the POUs are imported. These two
commands allow you to import POUs from STEP5 program files. When this done, the
POUs are inserted into the open PLC Designer project. You can select whether the
POUs will remain in the STEP5 IL language or be converted to an IEC language.
We recommend that the PLC Designer project into which you are importing be empty.
Of course, you must be certain that the library standard.lib is linked to your project,
otherwise you will be unable to import the counter and the timer.
15.1 Import from a SEQ Symbol File
SEQ format is a common format for symbol files in a STEP5 project. Symbol
assignments can be read from SEQ symbol files (*.seq). A symbol assignment contains
an absolute address for a S5 program element (input, output, memory location, etc.), a
corresponding symbol identifier and may also contain comments about the symbol. A
SEQ file is text file that contains one assignment of this type per line. Each of the
"Fields" in the line are separated by Tabs. Also each line can only hold one comment
which must begin with a semicolon.
The symbol assignments in the SEQ file will be translated into global variable
declarations based on IEC 61131-3. The symbolic name, the address and the comment
(if available) will be transferred during this process. The address will be adapted to IEC
61131-3 (Percent sign, etc.). Since a S5 symbol name can contain characters that are
not permitted in an IEC identifier, the names will be changed if necessary. Invalid
characters will be replaced by the underscore character. Should there be more than
one underscore character in a row, every second one would be replaced by a valid
character (e.g., "0"). If a symbol name is changed during the conversion, the original
name will be added in a comment after the change. SEQ comment lines will be
transferred as comments. Multiple blocks of global variables can be created. Each
block consists of less than 64K of text.
The SEQ format described is used in Siemens STEP5-PG Software, in most versions of
the Siemens STEP7-300/400 and in ACCON-PG from DELTALOGIC. This format is
supported in STEP7-SEQ files created in version 3.x or better. STEP7 version 2.x can
export a different SEQ format that is not supported. Instead of using separators
(Tabs), it is based on a fixed length for the symbolic name and uses blanks if
necessary.