Rockwell-automation Logix5000 Program Parameters Programming Manual User Manual download pdf (Page 29)

Connecting program parameters Chapter 1

Safety program to safety program connection rules

The following table summarizes the rules for using program parameters to connect

two safety programs.

Tip:

The connection rules for programs also apply to Equipment Phases.

Program_A

(Safety)

Program_B

(Safety)

Input Output InOut Public

Controller Scope

Tag (Safety Class)

Input

— Yes — Yes Yes

Output

Yes — Yes* Yes Yes

InOut

— Yes* — Yes Yes

Public

Yes Yes Yes — Alias

Controller Scope

Tag (Safety Class)

Yes Yes Yes Alias Alias

• * An InOut parameter can only be connected to an Output parameter if the

InOut parameter is configured as a constant.

• 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.

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Rockwell-automation Logix5000 Program Parameters Programming Manual User Manual Page 29