Rockwell Automation 1757-FFLDC4 FOUNDATION Fieldbus System User Manual - Manual (Page 156)

156 Rockwell Automation Publication 1757-UM012A-EN-P - July 2011
Appendix B Data Types and Data Structures
Data Structures The linking device function blocks contain the following data structures.
DS-65 - Value & Status (floating point structure)
This data structure consists of the value and status of floating point parameters
that are Inputs or Outputs.
DS-66 - Value & Status (discrete structure)
This data structure consists of the value and status of discrete value parameters.
DS-69 - Mode Structure
This data structure consists of bit strings for target, actual, permitted, and normal
modes.
Table 16 - Value & Status - Floating Point Structure - DS-65
E Element Name Data Type Size (bytes)
1 Status Unsigned8 1
2 Value Float 4
Table 17 - Value & Status - Discrete Structure - DS-66
E Element Name Data Type Size (bytes)
1 Status Unsigned8 1
2 Value Unsigned8 1
Table 18 - Mode Structure - DS-69
E Element Name Data Type Size (bytes)
1 Target Bitstring 1
2 Actual Bitstring 1
3 Permitted Bitstring 1
4 Normal Bitstring 1