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Reference Manual
IP2030/RM, Rev AA
Section 4: Getting started
June 2014
Section 4: Getting started
4.5.24 Set-up totalizing on the Mobrey MCU902 control unit
The Mobrey MCU902 has two independent, internal 8-digit totalizers, Totalizer 1 and
Totalizer 2, which are updated several times every second.
The totalizers can be easily set-up using the Totalizer Wizard, accessible by navigating to the
SETUP / [CONTROLLER /] OUTPUT / TOTALIZER menu. The Totalizer Wizard also forms a part of
the Application (App) Wizard.
Note
The wizards require the totalizer source parameter to have suitable units selected
e.g. m
3
/hour. If no suitable units are selected, an 'invalid units' message appears.
See “Using the App Wizard to set-up a flow application” on page 41 for a totalizing
example. After using the Totalizer or App Wizard, adjustments can be made to the
totalizer parameters.
Set-up Totalizer 1
Note
The totalizer operates with an input of control unit PV (D800) in units per second.
If the PV is a volumetric flow rate (e.g. m
3
/hour), the totalizer can accumulate this flow
volume and give the total volume throughput
Menu: SETUP / [CONTROLLER /] OUTPUT / TOTALIZER
P530 Total 1 factor (Factor default is 0.0)
One count is added to the Totalizer count (D828) for a quantity of flow as defined by
this parameter. The unit of measurement for D828 is defined by parameter P531
P531 Total 1 units (Factory default is “None”)
This parameter defines the units for the Totalizer 1 Count (D828).
When using totalizer units of gal, an 8-digit totalizer increments rapidly and rolls over
too frequently. To help, alternative totalizer units of galx10, galx100, galx1000,
and Mgal are available for selection. When these special units are selected after
selecting gal units, the totalizer factor (P530) is automatically re-scaled by x10, x100,
x1000, or x1000000 depending on the selection. Similarly, re-scaling is automatic for
ltrx10, ltrx100, etc. after selecting ltr as totalizer units.
See “Using the App Wizard to set-up a flow application” on page 41 for a flow
application example where galx100 totalizer units are needed.
P534 Pulse Width (Factory default is “100ms”)
A Totalizer mode relay is energized for a programmed duration (P534) each time the
Totalizer count (D828 or D829) is incremented. P534 controls the pulse width
(i.e. the pulse 'on' time) and is between 10 ms and 2.5 s, changeable in steps of 10 ms
Parameter P534 also defines the pulse width for a Sampler mode relay
(see “Set-up the relays” on page 69)