BSC

Binary Symmetric Channel

CRC

Cyclic Redundancy Check

PDU

Protocol Data Unit

[ISO/IEC 74981]

PL

Performance Level

[ISO 138491]

PLC

Programmable Logic Controller

SCL

Safety Communication Layer

SIL

Safety Integrity Level

[IEC 615084]

SPDU

Safety PDU, Safety Protocol Data Unit

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

PI

Platform Interface

PV

Process Values

SAPI

Safety Application Program Interface

SFRT

Safety Function Response Time

SPI

Safety Parameter Interface

STrailer

Safety Trailer

UASCTT

OPC UA Safety Compliance Test Tool

p

Bit error probability

Pre,cond

Conditional residual error probability