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doc/standards.rst
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Mon, 18 Apr 2016 18:56:51 +0300
changeset 1478 69fe0b81e951
parent 811 66a8812457d6
child 3925 1d383b4c0a23
permissions -rw-r--r--
make attribute CFLAGS and LDFLAGS optional and add default empty value

Actually CFLAGS and LDFLAGS are not required and can be empty.
Without default empty value if target platform in project settings was
set to "Linux" CFLAGS and LDFLAGS was initialized with NoneType.
The result was broken build and it wasn't to save/load project with
such settings.

Traceback (most recent call last):
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 956, in _Build
if not builder.build() :
File "/home/developer/WorkData/PLC/beremiz/beremiz/targets/toolchain_gcc.py", line 96, in build
Builder_CFLAGS = ' '.join(self.getBuilderCFLAGS())
TypeError: sequence item 0: expected string, NoneType found
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IEC 61131-3
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    IEC-61131 is a normative document provided by the standards organization IEC













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    (International Electrotechnical Commission) and describing a standard for













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    implementing programmable controllers.













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    The part 3 of this document (commonly named IEC 61131-3) specifies syntax and 













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    semantics for programming language for programmable controllers. Beremiz













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    implements all the languages described in this document. 













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    http://www.iec.eu













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PLCopen TC6













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    PLCopen is a vendor- and product-independent worldwide association defining













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    international standards for various topics related to control programming.













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    For this purpose, PLCopen has 6 technical committees.













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    The goal of the sixth committee (TC6) is to define a standard file format, 













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    based on XML, for exchanging programmables controllers programmed using 













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    IEC 61131-3 languages. Beremiz uses this file format for saving the PLC













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    programs of projects.













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    http://www.plcopen.org













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    31














beremiz