Terms - Mitsubishi Electric MELSEC iQ-R Series Safety Function Block Reference

TERMS

Unless otherwise specified, this manual uses the following terms.
Term
GX Works3
NC
NO
Performance Level (PL)
Risk
Safety application
Safety communications
Safety control
Safety CPU
Safety data
Safety device
Safety function module
Safety functions
Safety input
Safety output
Safety programmable controller
Safety related system
Safety remote I/O module
Safety station
SIL
Description
Product name of the MELSEC programmable controller software package.
Abbreviation for normal close contact which is normally closed, but opened when a switch or other function is operated.
Abbreviation for normal open contact which is normally opened, but closed when a switch or other function is operated.
Safety level which is standardized in ISO13849-1:2015. (The safety level is classified into five levels of a to e.)
Degree of hazards, which is the combination of the occurrence probability and degree of an injury and a health problem.
Generic term for the applications that are operated using the safety programmable controller for realizing the safety
functions.
Communication service to process the transmission at the safety layer defined in the safety communication protocol.
Safety programs are executed and safety communications are performed to control machinery. Machinery is stopped
safely when an abnormality occurs.
Generic term for the R08SFCPU, R16SFCPU, R32SFCPU, and R120SFCPU
This module is used with a safety function module as a pair, and performs both standard control and safety control.
Data which is transmitted through safety communications.
Device that can be used in safety programs.
Another term for the R6SFM
This module is used with the Safety CPU as a pair and performs safety control. The module can only be paired with the
Safety CPU.
Functions to be realized to protect a human from machinery hazards.
Generic term for the signals that are input to the safety programmable controller for realizing the safety functions.
Generic term for the signals that are output from the safety programmable controller for realizing the safety functions.
Generic term for the MELSEC iQ-R series modules that perform safety control (such as a Safety CPU, safety function
module, CC-Link IE Field Network remote I/O module (with safety functions))
System executing the safety functions to be required.
Abbreviation for the NZ2GFSS2-32D and NZ2EXSS2-8TE CC-Link IE Field Network remote I/O module (with safety
functions).
Generic term for the station to perform safety communications and general communications.
Safety level which is standardized in IEC61508: 2010. (The safety level is classified into four levels of SIL1 to SIL4.)
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