ProSoft Technology MVI56-AFC - Manual (Page 232)

MVI56-AFC Sample Logic MVI56-AFC ♦ ControlLogix Platform
User Manual Liquid and Gas Flow Computer
Page 232 of 316 ProSoft Technology, Inc.
February 25, 2011
Refer to the Meters[x].Analysis controller tag in order to move the concentrations
for each meter (x assumes values between 0 and 15).
The concentrations are entered as scaled integer format where 10000 = 100%.
For example:
C1 = 9168 ≥ 91.68%
The sum of all concentration should be 100%. The chromatograph can measure
values which total is slightly less (or more) than 100%. In this case you should
configure the Normalization Error Tolerance parameter in the AFC Manager in
order to make sure that the module will not generate any alarms.
When the module detects that a molar concentration value has changed it will
generate an event. However, when the values are updated from ladder logic
using a chromatograph device it is not convenient to generate an alarm every
time a concentration value changes. In this case you may configure the module
to not generate any alarms when a molar value is modified.