Rockwell Automation 1770-HT8 SMART TRANSMITTER - Manual (Page 16)

Introducing the Smart Transmitter
Interface
Chapter 1
1-5
Figure 1.4
Smart Transmitter Interface with Programmable Controller Host
90032
CONTROLVIEW
Smart
Transmitter
Interface
HART
Field
Devices
DH+
RIO
Programmable
Controller with
Ladder Logic
DH+ Host Communications (Using Programmable Controller
Pass-through)
Data can also be sent to and received from HART field devices using the
pass-through feature of the programmable controller to initiate Block
Transfer Reads and Writes (BTR and BTW). No dedicated programmable
controller ladder logic programs are required when the pass-through
feature is used. A host computer on the DH+ network, running programs
with pass-through support, can be used to communicate with the HART
field devices.
Figure 1.5
Smart Transmitter Interface with DH+ Host
(Using PassĆthrough)
90033
THIRD
PARTY
SOFTWARE
HART
Field
Devices
DH+
RIO
Programmable
Controller with
PassĆthrough
Feature
Smart
Transmitter
Interface
The RSĆ232C Port of the Communications Controller
The RS-232C port on the Communications Controller allows the HART
field devices to communicate with either a local host or, via modem, a
remote host.