viii
•
••
•
Glossary of Terms GEH-6632 EX2100 User’s Guide
sampling rate
The rate at which process signal samples are obtained, measured in samples/second.
serial loader
Connects the controller to the toolbox PC using the RS-232C COM ports. The Serial
Loader initializes the controller flash file system and sets its TCP/IP address to allow
it to communicate with the toolbox over Ethernet.
server
A PC, which gathers data over Ethernet from plant devices, and makes the data
available to PC-based operator interfaces known as Viewers.
shaft voltage suppressor
The shaft voltage suppressor is a filter that conducts to ground the high frequency
components of the induced voltages in the field current.
signal
The basic unit for variable information in the controller.
simplex
System with only one set of control and I/O boards. Contrast with redundant control
systems.
simulation
Running the control system using a software model of the generator and exciter.
SOE
Sequence of Events, a high-speed record of contact closures taken during a plant
upset to allow detailed analysis of the event.
Static Exciter
Produces a controlled dc field current without the use of a rotating generator.
TCP/IP
Communications protocols developed to inter-network dissimilar systems. It is a de
facto UNIX standard, but is supported on almost all systems. TCP controls data
transfer and IP provides the routing for functions.
TMR
Triple Modular Redundancy. An operation that uses three sets of control and I/O
(channels M1, M2, and C) and votes the results.