Safety Global Devices; Safety Local Devices - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

38.2

Safety Global Devices

A safety global device is a device that can be shared by all the safety programs.
38.3

Safety Local Devices

A safety local device is a device used individually by each safety program.
Devices that can be used as a safety local device
The following devices can be used as a safety local device.
• Safety internal relay (SA\M)
• Safety timer (SA\T)
• Safety retentive timer (SA\ST)
• Safety counter (SA\C)
• Safety data register (SA\D)
How to set safety local devices
The range and usability of the safety local devices can be set in the same way as the standard local devices. ( Page 369
Setting method for the local devices)
Set safety local devices within the number of device points set in the safety device point quantity setting. The
number of safety local device points used is calculated by the following calculation formula. Set the number of
safety local device points used so that the number is equal to or less than the capacity of the safety local
device area.
Total number of safety local device points used = ((A  16) + B + (C  2)  16))  D
• A: Number of points of the safety local device (SA\M)
• B: Number of points of the safety local devices (SA\D, SA\T (current value), SA\ST (current value), and
SA\C (current value))
• C: Number of points of the safety local devices (SA\T (contact/coil), SA\ST (contact/coil), and SA\C (contact/
coil))
• D: Number of programs using the safety local device
How to specify safety local devices
To specify safety local devices in a safety program, add "#".
Ex.
SA\#D100, SA\K4#M0
In the program, safety local devices are displayed with "#" in front of the device name. This helps users to
distinguish local devices from global devices.
SM777 setting
Regardless of the SM777 (Local device setting in interrupt programs) setting, local devices/safety local devices of a program
file in the storage location are always used in the standard program/safety program.
38 SAFETY DEVICES, SAFETY LABELS, AND CONSTANTS
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38.2 Safety Global Devices