Allen-Bradley 1794-IE8H, User Manual, Page: 45 / 146

Publication 1794-UM063A-EN-P - March 2006
Configurable FLEX I/O Analog Module Features 2-21
HART Read Back Threshold
This bit delivers the percentage value, in steps of 1%, of the threshold for
forcing the HART read back indication. The maximum input signal deviation
for HART analog modules is 31%.
If there is no HART transmitter on the loop or if the loop is not in the
transmitter list, the function is switched off internally in the I/O module.
The values are:
•
0 = disable indicator (default)
•
1 to 4 = not supported from the I/O module (set to 5 internally)
•
5 to 31 = percentage threshold data (5 to 31%)
Chapter Summary
In this chapter, we told you about the FLEX I/O system and the analog I/O
modules, and how they communicate with programmable controllers. Move to
Chapter 3 to learn how to install your FLEX I/O analog module.