Product data

Product Data Document
1660ds9b / D301294X012
October 2011 - Page 8
ControlWave GFC Plus
Remote Automation Solutions
www.EmersonProcess.com/Remote
Average Specic Gravity•
Average Heating Value•
Flow Time•
Uncorrected Count•
Each log entry also contains the date and time.
ControlWave GFC Plus has an Hourly Historical Log
for each run.
Daily Historical Data Log•
The Daily Data Log holds one record for every
contract day. The contract hour may be changed
by the user. The daily log holds 62 entries; this
ensures that the previous calendar month of daily
data is always resident in ControlWave GFC FLASH
memory. The following items are stored in the Daily
Data Log:
Corrected Volume•
Uncorrected Volume•
Accumulated Energy•
Average Static Pressure•
Average Temperature•
Average Differential Pressure•
Average Specic Gravity•
Average Heating Value•
Flow Time•
Uncorrected Count•
Each log entry also contains the date and time.
ControlWave GFC Plus has a Daily Historical Log
for each run.
Periodic Historical Data Log•
The periodic data log holds one record for every log
interval. Log interval is 15 minutes. The Periodic
Historical Data Log holds 1440 records, or four days
of 15 minute data. The following items are stored in
the Periodic Historical Data Log:
Flowing Differential Pressure•
Flowing Static Pressure•
Flowing Temperature•
Frequency•
Each log entry also contains the date and time.
ControlWave GFC Plus has a Periodic Historical
Data Log for each run.
Audit Trail Alarm and Event Storage•
ControlWave GFC keeps an Audit Trail Buffer ca-
pable of storing the most recent 500 Alarms and the
most recent 500 Events. Internally, these buffers are
maintained separately to prevent recurring alarms
from overwriting conguration audit data. Externally,
they are reported to the user as a single entity. Both
operate in a circular fashion with new entries over-
writing the oldest entry when the buffer is full. The
following circumstances cause an entry to be made
in the Audit Trail Buffer:
Any operator change to a ControlWave GFC •
Plus conguration variable
Any change in the state of a ControlWave GFC •
Plus alarm signal
A system restart•
Certain other system events•
Includes a nominations function•
Allows the user to select engineering units from •
a broad variety, including English and metric
Interfaces to a chromatograph and provides •
energy throughput as well as composition
information (note that the same port is
allocated for either a chromatograph or external
transmitters).
Self Diagnostics•
ControlWave GFC Plus periodically runs a series of
diagnostics to verify the operational status of vari-
ous system components. The tests include trans-
ducer parameters, main and backup battery volt-
ages, software sanity checks, and other indications
of system health. An appropriate alarm is generated
if any test fails.