Reference Manual
00809-0100-4716, Rev JA
May 2008
Rosemount 3095 MultiVariable
4-12
FIELDBUS
Capabilities Virtual Communication Relationship (VCRs)
There are a total of 20 VCRs. One is permanent and 18 are fully configurable
by the host system. Twenty five link objects are available.
Table 4-3. Parameters
FUNCTION BLOCK
OVERVIEW
For reference information on the Resource, Mass Flow Transducer, Sensor
Transducer, AI, LCD Transducer blocks refer to Appendix D: Block
Information. Reference information on the ISEL, INT, ARTH, SGCR, and PID
blocks can be found in the Foundation Fieldbus Blocks manual (document
number 00809-0100-4783).
Resource Block (1000)
The Resource block contains diagnostic, hardware and electronics
information. There are no linkable inputs or outputs to the Resource block.
Sensor Transducer Block (1100)
The Sensor Transducer Block contains sensor information including the
sensor diagnostics and the ability to trim the pressure, temperature and
differential pressure sensors or recall factory calibration.
(Contains PT, P, DP, T sensor variables)
Virtual Communication Relationship (VCRs) Value
VCRs 20
Links 25
Host timer recommendations Value
T1 96000
T2 192000
T3 480000
Network Parameter Value
Slot Time 8
Maximum Response Delay 2
Maximum Inactivity to Claim LAS Delay 32
Minimum Inter DLPDU Delay 8
Time Sync class 4 (1 ms)
Maximum Scheduling Overhead 21
Per CLPDU PhL Overhead 4
Maximum Inter-channel Signal Skew 0
Required Number of Post-transmission-gab-ext Units 0
Required Number of Preamble-extension Units 1
Block Execution Times Value
Analog Input 90ms
PID 120 ms
Arithmetic 90 ms
Input Selection 90 ms
Signal Characterizer 90 ms
Integrator 90 ms
Output Splitter 90 ms
Control Selector 90 ms
Analog Output 90 ms
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