MVI56E-AFC / MVI69E-AFC ♦ Enhanced Liquid and Gas Flow Computer
Configuring Linear Meter Pulse Count Options
ControlLogix® and CompactLogix™
Setup and Configuration Guide
ProSoft Technology, Inc.
Page 82 of 151
8
Configuring Linear Meter Pulse Count Options
If you select
Pulse Count
as the metering principle, you must configure the following
parameters:
Parameter
Description
Frequency
flow threshold
This is the threshold value for pulse frequency. If the received value is less than the
configured threshold, it is deemed to be zero.
Pulse input
rollover
When the meter is selected as a Pulse Meter, one of the input variables transferred from
the programmable logic controller is Pulse Count value. This is the number of pulses
transferred from the Pulse Meter or the High Speed Counter module. This parameter
sets the value at which the pulse count will rollover to zero. It is essential that this value
match the actual pulse rollover used in the field by the pulse meter or counter module,
otherwise the flow calculation will generate unexpected values. Enter this value as
(maximum value)+1.
Master pulse-
count rollover
This is a value that is 1 greater than the highest value that master pulse counters will
contain. Enter 0 for free-running counters which rollover to 0 from 4294967295.
Pulse flow
threshold;
count, time(s)
The first field should be 0 or a number between 2 and 20. The default is 0.
The second field should be 0 or a number between 5 and 60 in seconds. The default is
0.
K-factor
A number between 0.1 and 1.0e+8. The default is 1.0.
Units show is the setting of “Flow
input unit” of the “K-factor Characteristics” panel shown in the previous screen example.
Meter Factors
Click the
Meter Factors
button to display the
Meter Factor Linearization Curve
for this
stream. See above.
Summary of Contents for MVI56E-AFC
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