Running A Safety Program; Overview - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

35.10

Running a Safety Program

This section describes how to execute a safety program. Information not described in this chapter is same as that of the
standard CPU. ( Page 38 RUNNING A PROGRAM to  Page 92 MEMORY CONFIGURATION OF THE CPU
MODULE)
For details on the setting method (registration procedure) of safety programs, refer to the following.
 GX Works3 Operating Manual

Overview

The SIL2 Process CPU executes standard programs and safety programs, and the SIL2 function module executes safety
programs only. During operations, the SIL2 Process CPU verifies the execution results of safety programs with those of the
SIL2 function module.
SIL2 Process CPU
(Performs both standard control and safety control.)
Standard control
<Program B>
<FB α>
FB file for the
standard program
FB
Standard program file
Devices/labels that can be used in safety programs
Only safety devices and safety labels can be used in safety programs.
• Safety device: Page 554 Safety Devices
• Safety Label: Page 681 Safety Label
<Program A>
Data are sent and
received using
the standard/safety
shared label.
Safety program file
Standard device
Safety device
Safety label
Standard/safety
shared label
Standard label
Standard latch device,
standard latch label
File register
Device/label memory
Data required for programming
Safety control
<FB Ò>
FB file for the
safety program
FB
Execution results are verified.
SIL2 function module
(Performs safety control only.)
Safety control
<FB Ò>
<Program A>
FB file for the
safety program
FB
Safety program file
35 BASIC CONCEPT
35.10 Running a Safety Program
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