Attribute: ProcessValue With the 'ProcessValue' attribute, you decorate a member of a structure. In the CFC editor, you can then use the Use Attributed Members as Input command in order to connect thi

Attribute: qualified_only The effect of this pragma is that variables of a global variable list are addressed only by specifying the global variable name, for example gvl.g_var . This also applies to

Attribute: reflection The pragma decorates a POU for a compiler search for function block variables which are decorated with the 'instance-path' attribute or the 'is_connected' attribute. POUs with th

Attribute: subsequent Important VAR_TEMP in a program with attribute 'subsequent' leads to a compiler error. The pragma is used to allocate consecutive variables in memory. When the list changes, the

Attribute: to_string The pragma affects how the result of converting an enumeration component with the TO_STRING operator is output. If the enumeration declaration has the pragma, then the name of the

Bit Access in Variables Important Implement concurrent bit access by two tasks only if the processor can execute bit access directly on the memory. All x86 and x64 systems have commands for bit access

Extension of an interface You can extend interfaces just like function blocks. The interface is then also given the interface methods and interface properties of the basic interface in addition to its

Network Topology Information and recommendations for the topology of a control network It is recommended to set up a network system so that the following are possible: Extensive self-configuration (ad

Addressing and Routing Addressing means: the topology of the control network is mapped to unique addresses. A node address is composed hierarchically: For each network connection the associated block

Address Structures Network addresses Network addresses represent a mapping of the addresses of the network type (for example IP) to logical addresses within a control network. This mapping is performe