diff -r 255eada20688 -r 9aa1fdfb7cb2 plcopen/structures.py
--- a/plcopen/structures.py	Fri Oct 05 18:11:51 2007 +0200
+++ b/plcopen/structures.py	Wed Oct 17 17:50:27 2007 +0200
@@ -44,7 +44,7 @@
         for variable in block.inputVariables.getVariable():
             connections = variable.connectionPointIn.getConnections()
             if connections and len(connections) == 1:
-                if body_type == "FBD":
+                if body_type == "FBD" or body_type == "SFC":
                     value = generator.ComputeFBDExpression(body, connections[0])
                 elif body_type == "LD":
                     paths = generator.GenerateLDPaths(variable.connectionPointIn.getConnections(), body)
@@ -63,7 +63,7 @@
                 connections = variable.connectionPointIn.getConnections()
                 if connections and len(connections) == 1:
                     parameter = variable.getFormalParameter()
-                    if body_type == "FBD":
+                    if body_type == "FBD" or body_type == "SFC":
                         value = generator.ComputeFBDExpression(body, connections[0])
                         vars.append("%s := %s"%(parameter, generator.ExtractModifier(variable, value)))
                     elif body_type == "LD":