ABB Relion REF615R Manual page 64

Section 8
Glossary
58
Modbus A serial communication protocol developed by the Modicon
company in 1979. Originally used for communication in PLCs and
RTU devices.
MOM Momentary position
PCM600 Protection and Control Protection Relay Manager
PLC Programmable logic controller
PST Parameter Setting tool in PCM600
REF615R Wire-alike replacement option for DPU2000R with the same form
factor
SBO Select-before-operate
SSR1 System status register for device health
SSR2 System status register for device mode
SSR3 System status register for data available 1
SSR4 System status register for data available 2
SSR5 System status register for device alive counter
SSR6 System status register for last command result
stVal Status value
SW Software
UDR User-definable register
UTC Coordinated universal time
Val Value
WHMI Web human-machine interface
1MRS240173-IB B
DPU2000R Modbus Point List Mitigation Manual
REF615R