Black Box IC108A Betriebsanweisung PDF herunterladen (Seite 95)

Advant

Smart Device (HART

) Interface User’s Guide

Section 4.3 Runtime Displays

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4.2.2.3 Output Request Task

The output request task takes a request from the CCF output request queue and creates a

command request which is then sent to the transmitter via the transmitter queue. If grouping is

turned on it combines as many outputs as allowed into one command and places the request on

the transmitter queue. If any outputs are placed on the transmitter queue, the transmitter is

signalled to process it.

4.2.2.4 Transmitter Task

The transmitter takes requests off the transmitter queue allowing no more than one command to

be pending per smart device and sends the request to the appropriate port.

4.2.2.5 Receiver Task

The receiver takes the response from the smart device, determines whether there is a request

pending and that it matches with the response, updates the data base and flags CCF if the

response was to a digital read and any values have changed.

4.3 Runtime Displays

The runtime displays allow you to view parameter and status information for smart devices and

the SHIM they are connected to, as well as provide the capability to tune various configurable

parameters of a smart device.

Fields on the tuning displays contain either dynamic information (upper/lower range values,

primary value units, descriptor information, date, transmitter configurable message, and

damping value) or static information (digital value, command status, transmitter and CCF loop

tags, and sensor limits). The entries you make in these fields when changing a smart device’s

parameters depends on the type of field. For example, a data field such as for the damping value

requires a numeric entry while another field may provide a selection menu of available choices

such as PSI, LBS and so on for transmitter units.

4.3.1 Display Hierarchy

Runtime tuning of smart devices is accomplished through a series of hierarchical displays.

Specifically, the displays and the tuning information they provide are listed below:

Smart Device Network Overview

lists status of each SHIM connected to and configured for a particular Advant

Controller serial port as well as the number of smart devices connected to each

SHIM.

Smart Device I/O Display

lists data base information such as the device tag name, CCF tag name,

descriptor, and digitally read value for up to eight smart devices connected to a

particular SHIM.

Smart Device Tuning Overview

allows you to change the configuration parameters for a particular smart

device and download the changes to the smart device’s data base.

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Black Box IC108A Betriebsanweisung Seite 95