Mitsubishi Electric MELSEC iQ-R Series Safety Manual page 37

Creating programs for realizing the safety functions
Configure a program for realizing the safety functions using a method different from the standard program describing standard
control as a safety program.
Configure a safety program using safety devices, safety labels, standard/safety shared labels, instructions for safety measure,
and safety FB/FUN.
Devices can be used for the following safety program.
Classification Type
Safety user device Bit device
Bit/word device
Word device
Safety system device Bit device
Word device

Constant
Local devices can be used for the following safety program.
• Safety internal relay (SA\M)
• Safety timer (SA\T, SA\ST)
• Safety counter (SA\C)
• Safety data register (SA\D)
Safety devices can be used in safety programs are read-only from the GOT. For details on these devices, refer to the GOT
manual.
Labels can be used in safety programs are safety global labels, safety local labels, and standard/safety shared labels only.
The following indicates whether standard/safety program labels can be used or not.
R/W: readable and writable, : not readable nor writable
Label type
Global label
Local label
*1 Global label selected "standard" in category
*2 Global label selected "safety" in category
*3 Local label defined as standard program
*4 Local label defined as safe program
Set capacity and number of points for safety device, safety label, and standard/safety shared label used by the Safety CPU
from parameter setting window of the engineering tool.
For how to create a useable device/label, how to create safety program, programming method, and execution type of
programs, refer to the following.
 GX Works3 Operating Manual
 MELSEC iQ-R CPU Module User's Manual (Application)
Device name
Safety input
Safety output
Safety internal relay
Safety link relay
Safety timer
Safety retentive timer
Safety counter
Safety data register
Safety link register
Safety special relay
Safety special register

*1
Standard global label
Standard/safety shared global label
*2
Safety global label
*3
Standard local label
*4
Safety local label
4 PRECAUTIONS FOR USE OF SAFETY PROGRAMMABLE CONTROLLER
Symbol Notation
SA\X Hexadecimal
SA\Y Hexadecimal
SA\M Decimal
SA\B Hexadecimal
SA\T Decimal
SA\ST Decimal
SA\C Decimal
SA\D Decimal
SA\W Hexadecimal
SA\SM Decimal
SA\SD Decimal
K Decimal
H Hexadecimal
Standard program Safety program
R/W 
R/W R/W

R/W

R/W

R/W
4.2 Precautions for Programming
4
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