Rockwell Automation Logix5000 Program Parameters Programming Manual - Manual (Page 27)

Connecting program parameters Chapter 1
Special considerations apply when using program parameters within safety
programs.
General rules for connecting parameters for safety programs
The following are general rules when connecting parameters for safety programs.
• A safety parameter cannot connect to a standard parameter or controller
scoped tag of standard class; the controller scope must be of class safety.
• A safety parameter can source a standard parameter, as shown in the
following image.
• Safety Output parameters cannot connect to a standard class InOut
parameter.
• Safety local tags can alias safety class controller scope tags.
• Safety Public parameters can alias safety class controller scope tags.
Safety program parameters
Rockwell Automation Publication 1756-PM021A-EN-P - October 2014 27