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Glossary of Terms GEH-6632 EX2100 User’s Guide
fault code
A message from the controller to the HMI indicating a system warning or failure.
field flashing
The supply of initial exciter current during startup, usually from station batteries.
field ground detector
The field ground detector is an active circuit that detects a ground in either the ac or
dc sections of the exciter and field wiring.
field voltage regulator (FVR)
FVR is controller software that maintains the generator terminal voltage using inputs
from the Automatic Voltage Regulator (AVR) and the field voltage feedback.
firmware
The set of executable software that is stored in memory chips that hold their content
without electrical power, such as EEPROM or Flash.
flash
A non-volatile programmable memory device.
FVR
Field Voltage Regulator, software controlling the voltage across the field.
gating
Controlling the conduction of the power SCRs with an input pulse train (or a
voltage).
health
A term that defines whether a signal is functioning as expected.
heartbeat
A signal emitted at regular intervals by software to demonstrate that it is still active.
HMI
Human Machine Interface, usually a PC running Windows NT and CIMPLICITY
HMI software.
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