Specifications

Allen-Bradley ControlLogix Ethernet Driver Help
w/o
Offset Note: This is not an array of INTs in Boolean notation.
2. Applies to bit-within-INT only. Example: tag_1.0{16}.
3. .bit + array size cannot exceed 16 bits. Example: tag_1.1{16}
exceeds an INT, tag_1.0{16} does not.
Array
w/o
Offset
Byte Array, Char
Array**
Word Array, Short
Array, BCD Array
DWord Array, Long
Array, LBCD
Array***Float
Array***,****
If accessing more than a single element, the Controller tag must be an
array.
Array w/
Offset
Byte Array, Char
Array** Word Array,
Short Array, BCD Array
DWord Array, Long
Array, LBCD Array***
Float Array***,****
The Controller tag must be an array.
Bit Boolean 1. The range is limited from 0 to 15.
2. If the Controller tag is an array, the bit class reference must be
prefixed by an array element class reference. Example: tag_1
[2,2,3].0.
String String 1. If accessing a single element, the Controller tag need not be an
array.
Note: The value of the string is the ASCII equivalent of the INT
value (clamped to 255). Example: INT = 65 dec = "A".
2. If accessing more than a single element, the Controller tag
must be an array. The value of the string is the null-terminated
ASCII equivalent of all the INTs (clamped to 255) in the string.
1 character in string = 1 INT, clamped to 255
INT strings are not packed. For greater efficiency, use SINT
strings or the STRING structure instead.
*non-zero values are clamped to true.
**Values exceeding 255 are clamped to 255.
***Each element of the array corresponds to an element in the INT array. Arrays are not packed.
****Float value equals the face value of Controller tag in float form (non-IEEE floating-point number).
Examples
Examples highlighted in yellow signify common use cases.
INT Controller Tag - inttag = 65534 (decimal)
Server Tag Address Class Data Type Notes
inttag Standard Boolean Value = true
inttag Standard Byte Value = 255
inttag Standard Word Value = 65534
inttag Standard DWord Value = 65534
inttag Standard Float Value = 65534.0
inttag [3] Array Element Boolean Invalid: Tag not an array. Boolean is invalid.
inttag [3] Array Element Word Invalid: Tag not an array.
inttag {3} Array w/o Offset Word Invalid: Tag not an array.
inttag {1} Array w/o Offset Word Value = [65534]
inttag {1} Array w/o Offset Boolean Invalid: Bad data type.
inttag [3] {1} Array w/ Offset Word Invalid: Tag not an array.
www. kepware.com
64