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Reference Manual
00809-0100-4001, Rev JA
Appendix A: Reference Data
November 2012
Specifications and reference data
A.2.6 FOUNDATION fieldbus function block execution times
A.2.7 F
OUNDATION fieldbus Parameters
A.2.8 Standard Function Blocks
Resource Block
Contains hardware, electronics, and diagnostic information.
Transducer Block
Contains actual sensor measurement data including the sensor diagnostics and the ability to
trim the pressure sensor or recall factory defaults.
LCD Block
Configures the local display.
2 Analog Input Blocks
Processes the measurements for input into other function blocks. The output value is in
engineering units or custom and contains a status indicating measurement quality.
PID Block
Contains all logic to perform PID control in the field including cascade and feedforward.
Block Execution Time
Resource -
Tran sducer -
LCD Block -
Analog Input 1, 2 30 milliseconds
PID 45 milliseconds
Input Selector 30 milliseconds
Arithmetic 35 milliseconds
Signal Characterizer 40 milliseconds
Integrator 35 milliseconds
Schedule Entries 7 (max.)
Links 20 (max.)
Virtual Communications Relationships (VCR) 12 (max.)
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