Rockwell Automation 1757-ABRIO Process Remote I/O (RIO) Communication Interface Module - Manual (Page 125)

Publication 1757-UM007D-EN-P - December 2008 123
Accessing HART Data Chapter 9
1770-HT1 Module The 1757-ABRIO module supports scanning HART devices connected
to a 1770-HT1 module.
The 1770-HT1 module occupies one quarter rack on the RIO
network.
The 1757-ABRIO module can execute HART commands
cyclically to the various HART devices.
You can also use the 1757-ABRIO module to execute HART
commands manually (one time only) to configure HART devices.
This includes manually writing to the HART devices.
You can only execute commands cyclically.
Depending on the HART command, the returned data is either
floating point (numeric read tag) or text (text read tag).
The command status is returned as a single byte of flag data.
Since only one command is active to a specific device at one
time, if you want to view the message status for a device, you
need map it only once, even if there are multiple messages to
the same device.
The 1757-ABRIO module is intended to be used with HART
input devices. It is not suitable for use with output devices.
Rack Requirements
The 1770-HT1 module can be set for any rack number from 1 to 37
octal. The 1770-HT1 module must be configured at starting I/O
group 0. No other device can use the same rack number.