LCT Life cycle traceability
LE Light Edition
LED Light-emitting diode
LHMI Local human-machine interface
MAC Media access control
MMS 1. Manufacturing message specification
2. Metering management system
Modbus A serial communication protocol developed by the
Modicon company in 1979. Originally used for
communication in PLCs and RTU devices.
Modbus ASCII Link mode using 7-bit ASCII characters
Modbus RTU Link mode using 8-bit binary characters
Modbus TCP/IP Modbus RTU protocol which uses TCP/IP and Ethernet
to carry data between devices
NCC Network control center
PA Polyamide
PBT Polybutylene terephthalate
PC 1. Personal computer
2. Polycarbonate
PCM600 Protection and Control IED Manager
PRP Parallel redundancy protocol
PTP Precision Time Protocol
R/L Remote/Local
RAM Random access memory
RJ-45 Galvanic connector type
RoHS Restriction of hazardous substances
ROM Read-only memory
RS-232 Serial interface standard
RS-485 Serial link according to EIA standard RS485
RSTP Rapid spanning tree protocol
RTC Real-time clock
SAN Single attached node
SCL XML-based substation description configuration
language defined by IEC 61850
Single-line diagram Simplified notation for representing a three-phase
power system. Instead of representing each of three
1MRS758754 B Section 9
Glossary
REC615 and RER615 137
Operation Manual
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