
PLX51-HART-4I / PLX51-HART-4O
♦
HART Input/Output
Operation
Multidrop Field Devices
User Manual
ProSoft Technology, Inc.
Page 57 of 127
4.1.4 Multidrop
When using Multidrop HART devices with Logix, the user must select the Logix Tag
to be used to populate the HART device data. The user can either select to use the
current Multidrop tag structure or the legacy MVI56Legacy tag structure.
The user will need to use either of the provided MultiDrop UDTs for each tag used for
each HART multidrop device (as shown below):
Figure 4.6 – Multidrop – new and legacy UDTs
Important
: If the user does not use the provided UDTs it can result in unexpected behavior or no data
updates.
Once the Logix tags for each multidrop HART device have been selected, the
PLX51-HART-4x will automatically update the Logix tags with the data from each
multidrop HART device on each HART channel.