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HOW TO USE THIS MANUAL
This manual describes the points to be concerned when configuring a safety application that meets the safety standards using
the safety programmable controller.
Safety application configuration examples are provided in chapter 5 of this manual, but they have not obtained safety
approvals. It is user's responsibility to obtain a safety approval for the entire safety system.
This manual consists of five chapters.
Chapter 1: Overview of the safety programmable controller
Chapter 2: Safety application that is configured using the safety programmable controller
Chapter 3: Risk assessment, SIL, and PL
Chapter 4: Precautions for using the safety programmable controller
Chapter 5: Safety application configuration examples
For detailed specifications and functions of each module, refer to the relevant manuals.
Safety station on the CC-Link IE Field Network A generic term for stations on the CC-Link IE Field Network, which perform safety communications
and standard communications
Safety system A system that execute the required safety function
SB Link special relay. Bit data that indicates the operating status and data link status of a module on the
CC-Link IE Field Network.
SIL A safety level specified in IEC61508: 2010 (The safety level is classified into four levels, SIL1 to
SIL4.)
Slave station on the CC-Link IE Field Network A generic term for stations other than the master station on the CC-Link IE Field Network, such as a
local station, remote I/O station, remote device station, intelligent device station, or intelligent device
station (safety station)
Standard communications Communications other than safety communications, such as cyclic transmission and transient
transmission of the CC-Link IE Field Network
Standard control Machine control by standard programs and standard data communications. Programmable
controllers other than the safety programmable controller perform only standard control. (This term
is used to distinguish from safety control.)
Standard CPU A generic term for MELSEC iQ-R series CPU modules (other than Safety CPU) that perform
standard control (This term is used to distinguish from the Safety CPU.)
Standard programmable controller A generic term for MELSEC iQ-R series, MELSEC-Q series, MELSEC-L series, MELSEC-QnA
series, MELSEC-A series, and MELSEC-FX series modules that perform standard control (This
term is used to distinguish from a safety programmable controller.)
Standard remote I/O module The abbreviation for a remote I/O module on the CC-Link IE Field Network where only standard
inputs and outputs (not safety inputs and outputs) are connected (This term is used to distinguish
from a safety remote I/O module.)
SW Link special register. Word data that indicates the operating status and data link status of a module
on the CC-Link IE Field Network.
Target failure measure A target value of reliability specified in IEC61508: 2010 for each SIL level. There are two target
failure measures depending on the operation frequency of the safety function, PFDavg and PFH.
Term Description
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