ABB RELION 620 Series Communication Protocol Manual page 42

Section 5
Glossary
36
IED Intelligent electronic device
INF Information number
LED Light-emitting diode
LHMI Local human-machine interface
LSB Least significant bit
MSB Most significant bit
NAK Negative acknowledgement
NCC Network control center
OTEV Disturbance recording triggered from start bit
PCM600 Protection and Control IED Manager
Reset CU Reset communication unit
Reset FCB Reset flow control bit
SOF Status of fault
SW Software
TEST Disturbance data recorded in test mode bit
TM Disturbance data transmission in progress bit
TP Disturbance data recorded with or without trip bit
VDEW6 Communication protocol standard for protection devices
VSQ Variable structure qualifier
WHMI Web human-machine interface
1MRS757647 C
620 series
Communication Protocol Manual