diff -r 291a17b755d1 -r e15ca67197b9 py_ext/PythonFileCTNMixin.py
--- a/py_ext/PythonFileCTNMixin.py	Mon Feb 02 16:51:35 2015 +0100
+++ b/py_ext/PythonFileCTNMixin.py	Mon Feb 02 23:11:01 2015 +0100
@@ -7,7 +7,7 @@
 from PythonEditor import PythonEditor
 
 class PythonFileCTNMixin(CodeFile):
-    
+
     CODEFILE_NAME = "PyFile"
     SECTIONS_NAMES = [
         "globals",
@@ -16,45 +16,45 @@
         "start",
         "stop"]
     EditorType = PythonEditor
-    
+
     def __init__(self):
         CodeFile.__init__(self)
-        
+
         filepath = self.PythonFileName()
-        
+
         if os.path.isfile(filepath):
             PythonParser = GenerateParserFromXSD(
-                os.path.join(os.path.dirname(__file__), "py_ext_xsd.xsd")) 
-            
+                os.path.join(os.path.dirname(__file__), "py_ext_xsd.xsd"))
+
             xmlfile = open(filepath, 'r')
             pythonfile_xml = xmlfile.read()
             xmlfile.close()
-            
+
             pythonfile_xml = pythonfile_xml.replace(
-                'xmlns="http://www.w3.org/2001/XMLSchema"', 
+                'xmlns="http://www.w3.org/2001/XMLSchema"',
                 'xmlns:xhtml="http://www.w3.org/1999/xhtml"')
             for cre, repl in [
                 (re.compile("(?<!<xhtml:p>)(?:<!\[CDATA\[)"), "<xhtml:p><![CDATA["),
                 (re.compile("(?:]]>)(?!</xhtml:p>)"), "]]></xhtml:p>")]:
                 pythonfile_xml = cre.sub(repl, pythonfile_xml)
-            
+
             try:
                 python_code, error = PythonParser.LoadXMLString(pythonfile_xml)
-                if error is None:    
+                if error is None:
                     self.CodeFile.globals.setanyText(python_code.getanyText())
                     os.remove(filepath)
                     self.CreateCodeFileBuffer(False)
                     self.OnCTNSave()
             except Exception, exc:
                 error = unicode(exc)
-            
+
             if error is not None:
                 self.GetCTRoot().logger.write_error(
-                    _("Couldn't import old %s file.") % CTNName)
-    
+                    _("Couldn't import old %s file.") % self.CTNName())
+
     def CodeFileName(self):
         return os.path.join(self.CTNPath(), "pyfile.xml")
-    
+
     def PythonFileName(self):
         return os.path.join(self.CTNPath(), "py_ext.xml")
 
@@ -64,25 +64,26 @@
         return self.PreSectionsTexts.get(section,"") + "\n" + \
                getattr(self.CodeFile, section).getanyText() + "\n" + \
                self.PostSectionsTexts.get(section,"")
-        
+
 
     def CTNGenerate_C(self, buildpath, locations):
-        # location string for that CTN 
-        location_str = "_".join(map(lambda x:str(x), 
+        # location string for that CTN
+        location_str = "_".join(map(lambda x:str(x),
                                 self.GetCurrentLocation()))
         configname = self.GetCTRoot().GetProjectConfigNames()[0]
-        
-        
+
+
         # python side PLC global variables access stub
         globalstubs = "\n".join(["""\
 _%(name)s_ctype, _%(name)s_unpack, _%(name)s_pack = \\
     TypeTranslator["%(IECtype)s"]
 _PySafeGetPLCGlob_%(name)s = PLCBinary.__SafeGetPLCGlob_%(name)s
 _PySafeGetPLCGlob_%(name)s.restype = None
-_PySafeGetPLCGlob_%(name)s.argtypes = [ctypes.POINTER(_%(name)s_ctype)] 
+_PySafeGetPLCGlob_%(name)s.argtypes = [ctypes.POINTER(_%(name)s_ctype)]
 _PySafeSetPLCGlob_%(name)s = PLCBinary.__SafeSetPLCGlob_%(name)s
 _PySafeSetPLCGlob_%(name)s.restype = None
 _PySafeSetPLCGlob_%(name)s.argtypes = [ctypes.POINTER(_%(name)s_ctype)]
+_PySafePLCGlobals.append(("%(name)s","%(IECtype)s"))
 """ % { "name": variable.getname(),
         "configname": configname.upper(),
         "uppername": variable.getname().upper(),
@@ -101,19 +102,23 @@
                 else:
                     rtcalls += "    pass\n\n"
 
-        globalsection = self.GetSection("globals")      
+        globalsection = self.GetSection("globals")
+
+        pyextname = self.CTNName()
 
         PyFileContent = """\
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 ## Code generated by Beremiz python mixin confnode
-##        
-        
+##
+
 ## Code for PLC global variable access
 from targets.typemapping import TypeTranslator
-import ctypes 
+import ctypes
+_PyExtName = "%(pyextname)s"
+_PySafePLCGlobals = []
 %(globalstubs)s
-        
+
 ## User code in "global" scope
 %(globalsection)s
 
@@ -123,14 +128,14 @@
 """ % locals()
 
         # write generated content to python file
-        runtimefile_path = os.path.join(buildpath, 
+        runtimefile_path = os.path.join(buildpath,
             "runtime_%s.py"%location_str)
         runtimefile = open(runtimefile_path, 'w')
         runtimefile.write(PyFileContent.encode('utf-8'))
         runtimefile.close()
 
         # C code for safe global variables access
-        
+
         vardecfmt = """\
 extern  __IEC_%(IECtype)s_t %(configname)s__%(uppername)s;
 IEC_%(IECtype)s __%(name)s_rbuffer = __INIT_%(IECtype)s;
@@ -159,13 +164,13 @@
         }
         AtomicCompareExchange((long*)&__%(name)s_wlock, 1, 0);
     }
-""" 
+"""
         varpubfmt = """\
     if(!AtomicCompareExchange(&__%(name)s_rlock, 0, 1)){
         __%(name)s_rbuffer = %(configname)s__%(uppername)s.value;
         AtomicCompareExchange((long*)&__%(name)s_rlock, 1, 0);
     }
-""" 
+"""
 
         var_str = map("\n".join, zip(*[
             map(lambda f : f % varinfo,
@@ -180,10 +185,10 @@
             vardec, varret, varpub = var_str
         else:
             vardec = varret = varpub = ""
-        
+
         PyCFileContent = """\
-/* 
- * Code generated by Beremiz py_ext confnode 
+/*
+ * Code generated by Beremiz py_ext confnode
  * for safe global variables access
  */
 #include "iec_types_all.h"
@@ -208,15 +213,15 @@
 %(varpub)s
 }
 """ % locals()
-        
+
         Gen_PyCfile_path = os.path.join(buildpath, "PyCFile_%s.c"%location_str)
         pycfile = open(Gen_PyCfile_path,'w')
         pycfile.write(PyCFileContent)
         pycfile.close()
-        
+
         matiec_flags = '"-I%s"'%os.path.abspath(
             self.GetCTRoot().GetIECLibPath())
-        
+
         return ([(Gen_PyCfile_path, matiec_flags)],
                 "",
                 True,