Configure non-secure parameter references

Use a Non-Secure Parameter Reference to bring non-safety critical data from other SIS modules or DeltaV modules into an SIS module. Because these references are communicated over the I/O carrier, avoid using Non-Secure Parameter References for safety-critical data. Refer to the DeltaV SIS Safety Manual for more information.

Note

Downloading a logic solver may result in a value and/or status change of non-secure parameters. The effect on production depends on what the references for the non-secure parameters are used for.

Open an SIS module.
Drag a Non-Secure Parameter Reference from the Special Items palette onto the function block diagram.

A properties dialog opens for the Non-Secure Parameter Reference.
Enter a name for the parameter reference.
Select a parameter type to convert the reference to.
Select a parameter category.
Click the Browse button.

The Browse dialog contains parameters of the control modules, SIS modules, unit modules, and equipment modules in the area containing the SIS module. You can browse to modules in other areas. The parameters available in the browser are restricted to those that can be converted to one of the three valid SIS parameter types: UInt32 with status, Boolean with status, or a floating-point with status.
Browse for the parameter that you want to reference and click OK.

Note

It is also possible to enter a path instead of using the browser. If the path is unresolved, no warning appears until the SIS Module is verified during download, when it is listed as an unresolved reference.