ProSoft Technology MVI56-AFC User Manual

Page 231

MVI56-AFC ♦ ControlLogix Platform

MVI56-AFC Sample Logic

Liquid and Gas Flow Computer

User Manual

ProSoft Technology, Inc.

Page 231 of 316

February 25, 2011

Write Hourly/Daily Archive
The sample ladder logic shows how to create hourly or daily archive. It is very

important to notice that the sample ladder automatically creates both archives,

depending on the configured End-of-day minute and End-of-hour minute

parameters entered in the AFC Manager. Most users will not need to generate

the archives from ladder logic.
In order to create archives from ladder logic, refer to the following data tags:

Command

Use this Controller Tag

Description

Enable

AFC56. MeterSignals.Enable

This value should be set as 1 in order to
enable the command. If this value is 0 the

module will ignore the commands from

the ladder

Select Meter

AFC56. MeterSignals.Meter

Select the meter number (1 to 16) for the

archive command

Write Daily

Archive

AFC56. MeterSignals.Signals.
Wr_Hrly_Archive

If this bit is set to 1 the module will

generate an hourly archive

12.3.9 Molar Analysis (For Gas Product Only)

If the application uses a chromatograph device to send the molar concentrations

to the module, the sample ladder may dynamically supply all molar

concentrations to the MVI56-AFC.
Initially, you should select (check) the "Selected" check boxes for all elements

using the AFC Manager (clicking on the Components button (version 2.05.000 or

later) or Analysis button (version 2.04.000 or older) at the Meter Configuration

window).
In order to write the molar concentration values from the ladder logic, you should

set the AFC56.Meters[x].Analysis.Enable bit to 1. Also select the stream to be

updated through AFC56.Meters[x].Analysis.Stream controller tag (select 0 for the

current active stream).
If you select other stream than the one selected, the new molar analysis will only

be visible through AFC Manager once that stream is later selected as the new

active one.

After that, any molar concentration configuration performed through AFC

Manager will be overwritten by the ladder logic.

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