Alpha Technologies Cordex Controller Ver.3.1x - Manual (Page 84)

0700015-J0 Rev B 82
Start Trigger – enables data collection to be started manually, by event or by time. For example, select
Customize to edit/build an equation from the list of operands (alarms and signals) and operators (arith-
metic and logic):
Figure 91 — Alarm Equation web interface window
Figure 92 — Log Frequency
Mathematical operators
+
Add
- Subtract
* Multiply
/ Divide
Logical operators:
&
AND
| OR
! NOT TRUE
= EQUAL TO, compare for equality
< LESS THAN
> GREATER THAN
( OPEN PARENTHESIS, used with
a close parenthesis to set apart
arguments to a mathematical
function
) CLOSE PARENTHESIS, see
open parenthesis; used to clarify
the order of operations
Definitions
Data Log Files
– this list shows the filename (up to 16) and the number of records associated with each.
Select the filename to display and edit the information in the adjacent window.
File Information
– description and status of the log file is shown here.
Log Records is the number of records to be saved in the log file. Click on the value to edit.
Log Limit changes depending on the number of signals selected and the number of records in the other
log files.
NOTE: Recommended size is up to seven signals and a maximum one thousand entries, as very large log files
may not be viewable. If the datalog screen comes up blank, the log is too large to be displayed.
File Save Option enables a FIFO (first in first out) or “Stop when full” means of data collection.
Log Signals allows selection of log signals from a list (max. 32) See Figure 89.
Log Frequency – determines how often the data is collected. The default time interval is 60 seconds
and the range is from ten to 86,400 seconds (24 hours). An interval may also be set based upon when a
selected signal changes by the Delta Level; click on the value to edit.