Rockwell Automation PLC-5 Fieldbus Solutions for Integrated Architecture User Manual - Manual (Page 296)

Publication 1757-UM006A-EN-P May 2002
F-48 1788-CN2FF Installation Example
Figure F.7 PLC-5 Message Setup
This example message will retrieve the Analog Process Variable at
Instance, as shown in the Device Info Figure F.4 on page F-37,
because the attribute is 3. If the attribute was 4, it would retrieve the
ControlNet status. It would retrieve the FF status if the attribute was
150.