Distinguishing Between Standard And Safety Components; Hmi Devices - Allen-Bradley Compact GuardLogix 5370 User Manual

Distinguishing Between
Standard and Safety
Components
Slots in the Compact GuardLogix backplane not used by the safety function
can be populated with other CompactLogix modules that are certified to the
Low Voltage and EMC Directives.
See the product certifications at
certification/overview.page
Control–CompactLogix Product Family and determine which modules are
certified.
You must create and document a clear, logical, and visible distinction between
the safety and standard portions of the controller project. To aid in creating
this distinction, the Logix Designer application features safety identification
icons to identify the safety task, safety programs, safety routines, and safety
components. In addition, the Logix Designer application uses a safety class
attribute that is visible whenever safety task, safety programs, safety routine,
safety tag, or safety Add-on Instruction properties are displayed.
The controller does not allow writes to safety tag data from external human-
machine interface (HMI) devices or via message instructions from peer
controllers. The Logix Designer application can write safety tags when the
Compact GuardLogix controller is safety-unlocked, does not have a safety task
signature, and is operating without safety faults.

HMI Devices

HMI devices can be used with Compact GuardLogix controllers. HMI devices
can access standard tags just as with a standard controller. However, HMI
devices cannot write to safety tags; safety tags are read-only for HMI devices.
Rockwell Automation Publication 1769-UM022C-EN-P - June 2018
http://www.rockwellautomation.com/global/
to find the CE certificate for the Programmable
System Overview Chapter 1
17