Black Box IC108A Guía de usuario descargar pdf (Pagina 91)

Advant

Smart Device (HART

) Interface User’s Guide

3BUR 001 085R0001 REV A 4-1

Chapter 4 Runtime Operation

4.1 Product Operation

The data base used by the Advant Smart Device (Hart) Interface is downloaded when the

interface is powered up or reset. After an interface configuration is downloaded, periodic

scanning of the smart device data commences at the configured base rate. During a scan,

commands requesting data are sent to the SHIM for each smart device.

The smart devices respond to each command by sending back the requested data (via the

SHIM). The smart device configuration tables then specify how the smart device data is mapped

into the CCF data base, Figure 4-1. CCF accesses smart device values based on the input

channel specified for each loop.

When a smart device fails to respond to a command, in its configured number of retries, an

operator message is generated informing you of a smart device communications failure. The

data qualities of loops associated with the smart device are set to BAD. The software continues

to attempt to communicate with the smart device without generating further operator messages.

Smart devices cannot initiate communication. The Advant OCS serves as the master, and

therefore only responses initiated by the Advant OCS system are accepted.

Transfer of smart device variables to the Advant OCS data base via CCF loops that receive the

variables can provide the following functions within the Advant OCS System:

• Processing of smart device variables by the CCF loops that receive them, or by other CCF

loops.

• Display and user-manipulation of smart device variables via the Advant OCS console.

Operator changes to these variables can be transmitted back to the smart devices by the

system.

• Trending of smart device variables.

• Interaction with TCL programs.

• Inclusion of smart device variables in reports produced by the Report Services software.

• Inclusion of smart device variables in displays produced by the Display Builder software.

• Storing of smart device variables by the Historical Services software.

• Generation and logging of alarms for smart device variables.

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Black Box IC108A Guía de usuario Pagina 91