Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module - Manual (Page 172)

C-2 CIP/DSI Objects
Supported Data Types
Data Type Description
BYTE 8-bit unsigned integer
WORD 16-bit unsigned integer
DWORD 32-bit unsigned integer
LWORD 64-bit unsigned integer
SINT 8-bit signed integer
USINT 8-bit unsigned integer
INT 16-bit signed integer
UINT 16-bit unsigned integer
DINT 32-bit signed integer
UDINT 32-bit unsigned integer
BOOL 8-bit value -- low bit is true or false
BOOL[n] Array of n bits
STRING[n] Array of n characters
SHORT_STRING 1-byte length indicator + that many characters
STRUCT Structure name only - no size in addition to elements
CONTAINER 32-bit parameter value - sign extended if necessary
TCHAR 8 or 16-bit character
REAL 32-bit floating point