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Section 5
Glossary
615/620 series ANSI
51
Communication Protocol Manual
Section 5
Glossary
615/620 series Series of numerical IEDs for basic, inexpensive and simple
protection and supervision applications of utility substations, and
industrial switchgear and equipment
ACD
Start/pickup status
ACT
Application Configuration Tool in PCM600; Trip status
ANSI
American National Standards Institute
ASCII
American Standard Code for Information Interchange
CmdState
Command state
CPU
Central processing unit
CT
Current transformer
DNP3
A distributed network protocol originally developed by Westronic.
The DNP3 Users Group has the ownership of the protocol and
assumes responsibility for its evolution.
DPC
Double point control
DPS
Double point status
DS
Data set
EMC
Electromagnetic compatibility
Ethernet
A standard for connecting a family of frame-based computer
networking technologies into a LAN
HMI
Human-machine interface
HW
Hardware
IEC 61850
International standard for substation communication and
modelling
IED
Intelligent electronic device
INS/INC
Integer status
IP address
A set of four numbers between 0 and 255, separated by periods.
Each server connected to the Internet is assigned a unique IP
address that specifies the location for the TCP/IP protocol.
LED
Light-emitting diode
LHMI
Local human-machine interface
LSB
Least significant bit