Rockwell-automation 1797-OE8H FLEX Ex HART Analog Modules User Manual Uživatelský manuál stáhnout pdf (Strana 51)

Publication 1797-6.5.3 - March 2006

Understand Configurable FLEX Ex 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 = disabled (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 Ex 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 Ex analog module.

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Rockwell-automation 1797-OE8H FLEX Ex HART Analog Modules User Manual Uživatelský manuál Strana 51