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Allen-Bradley ControlLogix Ethernet Driver Help

Control Files Integer Files Float Files ASCII Files String Files BCD Files PID Files Message Files Block Transfer Files

PLC-5 Series Addressing for EtherNet/IP Gateway For more information on file-specific addressing, select a link from the list below.

Output Files Input Files Status Files Binary Files Timer Files Counter Files Control Files Integer Files Float Files ASCII Files String Files BCD Files PID Files Message Files Block Transfer Files

PLC-5 Series Addressing for ENI For more information on file-specific addressing, select a link from the list below.

Output Files Input Files Status Files Binary Files Timer Files Counter Files Control Files Integer Files Float Files ASCII Files String Files BCD Files PID Files Message Files Block Transfer Files

Logix Tag-Based Addressing

Rockwell Automation's Integrated Architecture uses a tag or symbol-based addressing structure that is commonly referred to as Logix Tags (or Native Tags). These tags differ from conventional PLC data items in that the tag name itself is the address, not a physical or logical address.

Note: Throughout this help file, Logix Tags will be assumed to be global in nature unless specified otherwise.

The Allen-Bradley ControlLogix Ethernet Driver allows users to access the controller's atomic data types: BOOL, SINT, INT, DINT, LINT, and REAL. Although some of the pre-defined types are structures, they are ultimately based on these atomic data types. Thus, all non-structure (atomic) members of a structure are accessible. For example, a TIMER cannot be assigned to a server tag but an atomic member of the TIMER can be assigned to the tag (such as TIMER.EN, TIMER.ACC, and so forth). If a structure member is a structure itself, both structures would have to be expanded to access an atomic member of the substructure. This is more common with user and module-defined types and is not found in any of the pre-defined types.

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