BSC

Binary Symmetric Channel

CRC

Cyclic Redundancy Check

FSV

Fail-safe substitute Values

HMI

Human-machine interface

ID

Identifier

LSB

Least significant bit

MNR

MonitoringNumber

MSB

Most significant bit

OA

Operator Acknowledgment

OPC UA PI

OPC UA Platform Interface

PDU

Protocol Data Unit

[ISO/IEC 74981]

p

Bit error probability

PI

Platform Interface

PL

Performance Level

[ISO 138491]

PLC

Programmable Logic Controller

Pre,cond

Conditional residual error probability

PV

Process Values

SAPI

Safety Application Program Interface

SCL

Safety Communication Layer

SFRT

Safety Function Response Time

SIL

Safety Integrity Level

[IEC 615084:2010]

SPDU

Safety PDU, Safety Protocol Data Unit

SPI

Safety Parameter Interface

STrailer

Safety Trailer