MVI56E-AFC / MVI69E-AFC ♦ Enhanced Liquid and Gas Flow Computer
Configuring Meter Groups
ControlLogix® and CompactLogix™
Setup and Configuration Guide
ProSoft Technology, Inc.
Page 51 of 151
meter/K factor curve
master pulse-count rollover
physical device
pulse input rollover
sample period limit
MVT linkage
Group-Member Synchronization
“Group-member Synchronization” configuration parameters consist of parameters which
are defined in the meter-group parent and kept consistent for all meter-group members.
Configuration parameters changed via a Modbus write to a group-parent are propagated
to all its group-members, and no additional side-effects (a.k.a.
“consequences”) are
required. That is, the update of the database due to the write is the complete and
sufficient change needed.
When a “Group-Member Synchronization” configuration parameter is written to a group-
member, the change attempt is denied by overwriting the requested data with the
original before verifying the request, just as if the point had been written with no change
requested; the member can be updated only by writing the change to its parent.
An example of a “Group-Member Synchronization” configuration parameters are the
meter reference conditions; both reference temperature and pressure are determined by
the group-parent, and update consists of writing the new values to the database with no
additional touches required other than that database change itself.
Other examples of “Group-Member Synchronization” configuration parameters include
the following:
product group
system of units
density units
reference conditions
end-of-period settings
Units
accumulation rollovers
analysis component map
active stream select
composite subcomponent molar fractions
calculation methods: relative density and heating value
heating value basis
analysis normalization error tolerance
stream product description
Summary of Contents for MVI56E-AFC
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