doc/standards.rst
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Thu, 21 Feb 2019 10:17:38 +0300
changeset 2512 69cef4e37ef9
parent 811 66a8812457d6
child 3925 1d383b4c0a23
permissions -rw-r--r--
Fix non-marking as manually forced floating point variable if the value isn't integer

For example, if user in debug variable panel set any floating point
variable to 34.3, then it's not shown as forced (blue color) and user
can't release this enforcement.

If user changes the value to 34.0, then enforcement shows
correctly. This is done because binary representation of floating point
numbers in IDE and runtime can be slightly different (double vs float)
and as a result values aren't equal.
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IEC 61131-3
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===========
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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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===========
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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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