ProSoft Technology MVI56E-LDM - Manual (Page 41)

ControlLogix Platform ♦ "C" Programmable Understanding the MVI56-LDM API
Linux Application Development Module Developer's Manual
ProSoft Technology, Inc. Page 35 of 264
March 12, 2014
Array[1, 2, 3] Three dimensional array element
Structure.Element Structure element
StructureArray[1].Element Single element of an array of structures
Program Tags are tags declared in a program and scoped only within the
program in which they are declared. To correctly address a Program Tag, you
must specify the identifier "PROGRAM:" followed by the program name. A dot (.)
is used to separate the program name and the tag name.
PROGRAM:ProgramName.TagName
PROGRAM:MainProgram.TagName Tag "TagName in program called "MainProgram"
PROGRAM:MainProgram.Array[11] An array element in program "MainProgram"
PROGRAM:MainProgram.Structure.Element A Structure Element in program "MainProgram"
Rules

A tag name can contain up to 40 characters
 A tag name must start with a letter or underscore ("_"). All other characters
can be letters, numbers or underscores.
 Names cannot contain two contiguous underscore characters and cannot end
in with an underscore
 Letter case is not considered significant
 The naming conventions are based on the IEC-1131 Rules for Identifiers.
For additional information on ControlLogix CPU tag addressing, please refer to
the ControlLogix User Manual.
4.2 MVI56E-LDM Development Tools
An application that is developed for the MVI56E-LDM module must be executed
from the module’s Flash ROM disk. Tools are provided with the API to build the
disk image and download it to the module’s Config/Debug port.