Honeywell Experion LX Operator's Manual page 201

Displaying detailed process information
Item Description
A meter factor is a multiplier that is used for calibration purposes.
Every time the controller's counter value is scanned, the PV value is determined by
the following formula:
PVnew = PVold + (SF × MF × Rawcounts)
PVnew = The new PV.
Meter
factor
PVold = PV at the last scan.
SF = The scale factor.
MF = The meter factor.
Rawcounts = The change in the counter value since the last scan. If the new raw
count is less than the old raw count, the counter is assumed to have rolled over.
The scale factor is a multiplier (usually close to 1) that is used to convert the raw
counts of the totalizing device into engineering units.
Scale
For example, if you are measuring totals in megaliters, and the counting device uses
factor
1 count to indicate 1 megaliter, the scale factor would be 1; if it uses 1 count to
indicate 2 megaliters, the scale factor would be 2.
In defining an accumulator point you need to specify the value at which the 'physical'
counting or totalizing mechanism on the device or controller rolls over.
Rollover
Note that, regardless of this 'physical' rollover value, the accumulator point PV
value
continues to increase indefinitely until it reaches its maximum value or until it is
reset by an operator.
Services
Enable and disables scanning and control of the point. You typically need to disable
a point if the associated device is being serviced or repaired—this prevents
Scanning
misleading alarms being generated.
and control
enabled
In addition to using this check box, you can also click
toolbar, or press F11 (or LOAD on an OEP/IKB keyboard).
Enables and disables all alarms for the point.
Alarms
This check box overrides each of the Enable Alarm check boxes for each state,
enabled
which are located on the Alarms tab.
Journal When selected, handles all alarms for the point as journaled events. Note that
only option Alarms enabled must be selected for this option to work.
Manual
When selected, the operator is permitted to change the PV.
PV
Honeywell 2017
(Enable/Disable) on the
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