Frequently Asked Questions (FAQs)

Where can STRING data be accessed?
	Due to AOI constraints, complex data types cannot be exposed as Input/Output parameters. Refer to Accessing Data via the Acyclic Buffer for instructions on accessing STRING data.
What are the lines attached to the right side of the AOI?
	All the data exposed by an AOI exists within the main body, except for data exposed with Output parameters of type BOOL. This data exists on the right side of the AOI, as outlined with the red box in the screenshot below.
How are TeSys™ Island configuration changes integrated into a project?
	If the naming convention has been altered for a TeSys island or pre-existing avatars, all the imported Studio 5000^® software entities (tags, AOIs, and generic Ethernet module) must be deleted and the import process repeated for the new configuration. If the naming convention has not changed for pre-existing entities, the import process can be repeated without deleting previously imported entities. Change the import Operation from Use Existing to Overwrite, as shown in the image below.
Why do 32-bit unsigned integers have a maximum displayed value of 2,147,483,647?
	Rockwell Software^® Studio 5000 software only handles signed integers. For this reason, the maximum positive value that can be displayed for 32-bit unsigned integers is 2,147,483,647. To enforce this, logic exists within AOIs to max out UDINT registers if the sign bit is used. For these TeSys island registers, a flag exists as an exposed parameter to indicate overflow. These flags are of type BOOL with the naming convention {TagName}_O.

What happens if the Acyclic function blocks return extended error code 0312 "Link address not available"?

This error code will occur if the communication path in the Message Configuration for the function block is not configured. This can happen if the Subroutine and AOI are imported prior to the IP address of the TeSys island instance being defined (see section "Import the TeSys island Module"). To fix this, browse for the TeSys island device in the "Path" setting in the Message Configuration window for each Acyclic function block.