Mitsubishi Electric MELSEC iQ-R Series - Terms

5
TERMS
Unless otherwise specified, this manual uses the following terms.
Term Description
GX Works3 Product name of the MELSEC programmable controller software package.
NC Abbreviation for normal close contact which is normally closed, but opened when a switch or other function is operated.
NO Abbreviation for normal open contact which is normally opened, but closed when a switch or other function is operated.
Performance Level (PL) Safety level which is standardized in ISO13849-1:2015. (The safety level is classified into five levels of a to e.)
Risk Degree of hazards, which is the combination of the occurrence probability and degree of an injury and a health problem.
Safety application Generic term for the applications that are operated using the safety programmable controller for realizing the safety
functions.
Safety communications Communication service to process the transmission at the safety layer defined in the safety communication protocol.
Safety control Safety programs are executed and safety communications are performed to control machinery. Machinery is stopped
safely when an abnormality occurs.
Safety CPU 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.
Safety data Data which is transmitted through safety communications.
Safety device Device that can be used in safety programs.
Safety function module 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.
Safety functions Functions to be realized to protect a human from machinery hazards.
Safety input Generic term for the signals that are input to the safety programmable controller for realizing the safety functions.
Safety output Generic term for the signals that are output from the safety programmable controller for realizing the safety functions.
Safety programmable controller 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))
Safety related system System executing the safety functions to be required.
Safety remote I/O module Abbreviation for the NZ2GFSS2-32D and NZ2EXSS2-8TE CC-Link IE Field Network remote I/O module (with safety
functions).
Safety station Generic term for the station to perform safety communications and general communications.
SIL Safety level which is standardized in IEC61508: 2010. (The safety level is classified into four levels of SIL1 to SIL4.)