Rockwell Automation 1757-ABRIO Process Remote I/O (RIO) Communication Interface Module - Manual (Page 31)

Publication 1757-UM007D-EN-P - December 2008 29
Configure the 1757-ABRIO Module Chapter 2
Flag Read (3) and Flag Write (4) tags
– Flag read and write tags are arrays of 512 bits.
– Block transfer modules also have status bits that can be
mapped to flag read tags.
– Dragging an entire I/O Grp to a Flag Read or Flag Write tag
will expose all discrete read or write values for that rack as
well as the Rack Global Status tag.
Text Read (5) tags
– Text read tags are arrays of 64 bytes.
– They are used only with the 1770-HT1 HART module.
From the ProcessLogix or ControlLogix perspective, the HART
interface is read only. You can read text and tags from the
HART, but you can’t write data to the HART.