Emerson Process Management ControlWave XFC - Manual (Page 31)

CI-ControlWave XFC Introduction / 1-17
• Accumulated Energy
• Average Static Pressure
• Average
Temperature
• Average Differential Pressure
• Average Specific Gravity
• Average Heating Value
• Flow
Time
• Uncorrected Count
Each log entry also contains the date and time. The ControlWave XFC has a Hourly
Historical Log for each of two runs.
1.5.3.2 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 XFC 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 Specific Gravity
• Average Heating Value
• Flow
Time
• Uncorrected Count
Each log entry also contains the date and time. The ControlWave XFC has a Daily
Historical Log for each of the two runs.
1.5.3.3 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. The ControlWave XFC has a Periodic
Historical Data Log for each of four runs.
1.5.3.4 Alarm and Event Storage
The ControlWave XFC keeps an Audit Trail Buffer capable of storing the most recent 500
Alarms and the most recent 500 Events. Internally, these buffers are maintained