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Reference Manual
IP2030/RM, Rev AA
Section 4: Getting started
June 2014
Section 4: Getting started
4.5.23 Set-up totalizing on the Mobrey MCU901 control unit
Totalizer (cumulative totalized flow) on the Mobrey MCU901
The MCU901 has an internal 8-digit totalizer that is updated several times every second.
Note
The totalizer operates with an input of the control unit PV (D800) in units per second.
When 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
The totalizer can be easily set-up using the Totalizer Wizard, accessible by navigating to the
TOTALIZER menu. The Totalizer Wizard also forms a part of the Application (App) Wizard.
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.
Note
The wizard requires 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.
Figure 4-43. Navigating to the TOTALIZER menu
Menu: SETUP / [CONTROLLER /] OUTPUT / TOTALIZER
P530 Total Factor (Factor default is 0.0)
One count is added to the Totalizer Count (D828) for a quantity of liquid as defined by
this parameter. The display units for D828 is defined by P531.
P531 Total Units (Factory default is “None”)
This parameter defines the units for the Totalizer 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.
MAIN MENU
Run App?
MONITOR
SETUP
SELECT INSTRUMENT
Tx1: **** #1
Controller: ****
SETUP
APPLICATION
DISPLAY
OUTPUT
OUTPUT
CURRENT OUTPUT
RELAY
TOTALIZER
1
TOTALIZER
Total Factor
Total Units
Totalizer Wizard
Note: The SELECT INSTRUMENT menu does not
appear unless a HART transmitter is connected.
Note: The Mobrey MCU901 screens are shown here.
x2
x2