
Chapter 1 Connecting program parameters
Safety program to standard program connection rules
The following table summarizes the rules for using program parameters to connect
a safety program to a standard program.
Tip:
The connection rules for programs also apply to Equipment Phases.
Program_A
(Safety)
Program_B
(Standard)
Input Output InOut Public
Controller Scope
Tag (Safety Class)
Input
— Yes — Yes Yes
Output
— — — — —
InOut
— — — — —
Public
— — — — —
Controller Scope
Tag (Safety Class)
Yes Yes Yes Alias Alias
• An Input parameter from Program_A can connect to an Output parameter
of Program_A (wrap around).
• Safety mapping must be used to connect standard class tags to safety class
tags/parameters.
• Standard class tags cannot alias safety class tags.
30 Rockwell Automation Publication 1756-PM021A-EN-P - October 2014
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