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4-4 Field Control™ Genius® Bus Interface Unit User’s Manual
–
October 1999 GFK-0825F
4
Group Data for Intelligent Modules
Intelligent modules can also be configured for "Group" data transfer with the BIU or with other
intelligent devices in the same Field Control station. A data group is a selected set of data that the
BIU transfers from one location to another location in the station. The BIU can transfer the group
data during every sweep of its operations, or only during specified sweeps. This ability to "skip"
group data transfers during certain sweeps makes it possible to shorten the BIU's overall sweep
time.
Up to 16 groups can be set up for an I/O station.
A group contains data from only one module to
only one module. Either module may be an I/O
module, a Micro Field Processor, or the Bus Interface Unit.
Field Control Station
Bus Interface Unit
Group Data is
Transferred
During Selected
Sweeps Only
Intelligent I/O
Module
Micro Field
Processor
I
AI
Q
AQ
I
AI
Q
AQ
I
AI
Q
AQ
A group can consist of a combination of I, Q, AI, and/or AQ data.
For each data type, a starting offset and length can be specified. It is not necessary to move all
of a module's data.
The data does not need to be moved during each BIU sweep.
Selective Sweep
For group data only, the BIU can move the data on each sweep, or on any combination of up to 16
sweeps. The selection of sweeps is easily made when configuring the group.
Examples
Appendix D includes examples of how data might be configured for group moves.