Chapter 38 Safety Devices, Safety Labels, And Constants; Safety Devices; List Of Safety Devices - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

38
SAFETY DEVICES, SAFETY LABELS, AND
CONSTANTS
This chapter describes the safety devices, safety labels, and constants.
38.1

Safety Devices

A safety device is a device used in safety programs. The safety devices can be used only in the safety programs.
• The safety devices cannot be used in the standard programs.
• An index modification and indirect specification cannot be performed in safety programs.

List of safety devices

The following table lists the safety devices.
Classification Type
Safety user devices Bit
Bit
Bit
Bit
Bit/word
Bit/word
Bit/word
Word
Word
Safety system devices Bit
Word
For details on standard devices used for the SIL2 Process CPU, refer to the following.
Page 330 DEVICES
Device name Symbol
Safety input SA\X
Safety output SA\Y
Safety internal relay SA\M
Safety link relay SA\B
Safety timer SA\T
Safety retentive timer SA\ST
Safety counter SA\C
Safety data register SA\D
Safety link register SA\W
Safety special relay SA\SM
Safety special register SA\SD
38 SAFETY DEVICES, SAFETY LABELS, AND CONSTANTS
Number of Changeability with
points (default) parameter settings
8K points Selectable either 8K or 12K
points
8K points
6K points Changeable ( Page 668
Safety device area setting
4K points
range)
512 points
0 points
512 points
12K points
4K points
4K points Unchangeable
4K points
Notation
Hexadecimal
Hexadecimal
Decimal
Hexadecimal
Decimal
Decimal
Decimal
Decimal
Hexadecimal
Decimal
Decimal
675
38.1 Safety Devices
38