Emerson Process Management ControlWave EFM 3808 - Manual (Page 211)

CI-ControlWave EFM Appendix F / F- 11
Percent Delivered
This signal provides the percentage of target delivered to this point in the current
nomination period.
NEXT NOMINATION PERIOD - This section allows the operator to set/view the
following parameters associated with the next nomination which is to be programmed
(has been programmed): Note: New entries must be made prior to the ending of the
current nomination period.
Start: day/hour
The actual start day of the month (1-31) and start hour (0-23) when the next nomination
period is to start is displayed or entered. The start day is ignored if the daily nomination
feature is enabled.
Stop: day/hour
The actual stop day of the month (1-31) and stop hour (1-23) when the next nomination
period is to end is displayed or entered. The stop day is ignored if the daily nomination
feature is enabled.
Target Value (x 1000)
The Target value provides (is used to set) the value of Volume/Energy to be delivered
during the next nomination period.
LAST NOMINATION PERIOD - This section allows the operator to view information
associated with the last nomination period which was completed. Information displayed
remains valid until the next time a nomination period ends (when the information is up-
graded to reflect the new "last" nomination period. Start and end times stored here
indicate the actual time that the nomination period ended, which is not necessarily the
programmed time (because of the time required to close/open valves or complete other
actions). The days are valid even if the daily nomination mode is active.
3. Program all the configuration items for the NEXT Nomination Period such as start
and stop times and target value.
4. Set the desired parameters for NOMINATION CONTROL such as Quantity units,
Control mode, Stop mode, Daily only mode and Alarm at a level of and then set the Main
function signal to the Enable State.
5. If a radio is to be used in conjunction with a "logical nomination alarm," access the
Radio Control Configuration Web Page (see Figure F-12) via the Radio Control button.
See Section F.5.6 to configure the radio for logical nomination alarms.
F.5.4.1.2 Beginning a Nomination Period
When no nomination period is in progress, the ControlWave EFM compares the NEXT
start date and time to the current time. If the date and time match (or time only for the
daily nomination mode), a new period is begun. The current time is copied into the
CURRENT START signals, and the next target is copied into the current target. The ac-
cumulators for the current period are zeroed and the current stop time is set to the next
start time. If the PID mode is selected, a new flow setpoint is calculated and stored in the
setpoint signal. The PID setpoint is recalculated every 15 minutes and whenever any
parameter is changed.