Emerson 375 User Manual page 109

G-v
Link Scheduling time
Link Scheduling time is a link-specific time represented as an offset
from Data Link Time. It is used to indicate when the LAS on each link
begins and repeats its schedule. System management uses it to
synchronize function block execution with the data transfers
scheduled by the LAS.
Personal Computer (PC)
Synonymous with microcomputer, a computer that serves one user in
the office or the home. PCs are the largest installed base of personal
computers.
Polling
A method of sequentially interrogating a network to determine which
devices are present.
Process variable (PV)
A process parameter that is being measured or controlled (e.g., level,
flow, temperature, mass, or density).
Segment (Fieldbus only)
The section of a fieldbus that is terminated in its characteristic
impedance. Segments are linked by repeaters to form a complete
Fieldbus.
System Card
An internal Secure Digital Card with non-volatile Flash memory. A
copy of installable 375 Field Communicator application software
exists on every SC. The SC memory also stores all HART and
F fieldbus Device Descriptions.
OUNDATION
User data file
A text (.TXT) file created by a user either on a PC or with the
ScratchPad application on the 375. User data files can be transferred
between the 375 Programming Utility and a 375.