Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 385)

App-16
IM 04L31A01-01E
Appendix 4 Additional Explanation of the Report
Function
This section is a supplement to the information covered in “Report Function” in section
1.18, “Computation and Report Functions (Option).” For a description on the data
format, see the next section, appendix 5, “Data Formats of ASCII Files.”
Types of Reports and Their Details
Types of Reports
• Hourly Report
Every hour on the hour, the average, maximum, minimum, and sum values of the
specified channels are determined from an hour of data up to the current hour and
written to the internal memory.
• Daily Report
At the specified time every day, the average, maximum, minimum, and sum values of
the specified channels are determined from a day of data up to the specified time and
written to the internal memory.
• Weekly Report
At the specified time of the specified day every week, the average, maximum,
minimum, and sum values of the specified channels are determined from a week of
data up to the specified time and written to the internal memory.
• Monthly Report
At the specified time of the specified date every month, the average, maximum,
minimum, and sum values of the specified channels are determined from a month of
data up to the specified time and written to the internal memory.
Report Data Output Example (Hourly Report)
Number of the report data being displayed
Number of report data in the internal memory
Type of report
Channel No. or
tag name Unit
Start date/time
Report data status
Date/time of the
newest report
Average, maximum, minimum, and sum
Combinations of Reports That Can Be Created
The reports created by the CX2000 can be set to “hourly only,” “daily only,” “hourly and
daily,” “daily and weekly,” or “daily and monthly.”
Number of Measurement and Computation Channels That Can Be Assigned to the Report
Up to 30 channels can be assigned to one report.
The report data is not created for channels that are set to [Skip] or those that have the
computation turned [Off].
Unit of Sum Computation
In the sum computation, data are summed over the scan interval. However, for flow
values that have units /s, /min, /h, or /day a simple summation results in the actual value
not matching the computed result, because the scan interval and the unit of the input
values are different. In these cases, the unit of the data measured over the scan interval
is converted to match the unit of the input values, and the computation is performed.
For example, if the scan interval is 2 s, and the input value is 100 m
3 /min, a simple
summation would add 100 every 2 s resulting in 3000 after one minute. However, if the
sum unit is set to /min, then 2 s/60 s is multiplied every scan interval before the value is
added giving a result that has an m
3 /min unit.
The following converting equations are used to compute the sum. The scan interval unit
is in seconds.