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Cascade
Remote Cascade
Target
Mode
Remote Out
Back Calculation
Primary Input
Block Specific
Parameters
3.5
Tags, Addresses, and Live List
Tag and address assignments
Before a fieldbus device can actively join a network it must be assigned a name and data
link address. Device names are system specific identifiers called physical device tags
(PD_TAG).
The PD_TAGs may be assigned by the vendor or through the System Management
Kernel (SMK), normally in an off-line configuration environment so devices without tags
are kept off the operational network.
The SMK for devices without tags are set to the Uncommissioned state and connected to
the bus at one of four default device addresses. The Data Link Layer specifies these
default addresses as non-visitor node addresses. The following figure shows the general
allocation of data link layer addresses to field devices.
R400
Experion PKS Series A Fieldbus Interface Module User's Guide
July 2010
Actual
1
Mode
Mode
Calculation
Figure 12 Algorithm execution phase sequence
Honeywell
3. Fieldbus Integration With Experion System
3.5. Tags, Addresses, and Live List
2
Set Point
Calculation
Set Point
PV
3
Out
Calculation
SP & OUT
4
Output
Parameters In
Backward Path
Primary Output
Remote Cascade Out
Back Calculation Out
Remote Out Out
69
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