Flowlink 5.1 Software Instruction Manual - Isco

Isco Flowlink 5.1 ® Software
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Time Table
Conditions
Parentheses and
Order of Execution
Time table conditions are satisfied when the instrument’s
internal clock is within the defined duration of time. An example
of a Daily Time table condition would read “starting Daily at
08:00:00, stopping Daily at 17:00:00.”
As many as four times can be entered, using any combination of
time table types. For example, to enable a function every Monday,
Wednesday, and Friday, three weekly start/stop times would be
defined in the time table. The three lines would possibly read
“Starting Monday at 08:00:00, Stopping at Monday 17:00:00;
Starting Wednesday at 08:00:00, Stopping Wednesday at
17:00:00; and Starting Friday at 08:00:00, Stopping Friday at
17:00:00.”
To define the time table
1. Select the type of time table. The options are:
• Specific – Start/stop dates and times for one-time
use.
• Weekly – Start/stop days of week and times,
recurring weekly.
• Daily – Start/stop times, recurring daily.
• Mon-Fri – Start/stop times, recurring each day of the
workweek.
2. Complete the Start and Stop fields. The resulting
duration will be displayed in the text box below the entry
fields.
3. To define additional start/stop times, click Add and
repeat the steps above.
Note: Start/stop times can be deleted by highlighting the
line in the text box and clicking Remove.
4. Click Accept. The time table is defined and ready for use
in an equation.
Flowlink provides parentheses so that you can group conditions
or even combine groups with logical operators. Parentheses also
let you control the order in which the flow meter evaluates the
conditions in an equation. The instrument will use an algebraic
order of execution when evaluating a trigger equation. The order
of execution is the order in which the instrument tests conditions
and can be summarized as: “from left to right, and from inside,
out.” “From left to right” means that the flow meter tests
conditions in the same order that you read them in an equation:
from left to right.
When evaluating an equation containing two conditions, the
instrument first checks the condition on the left, then the
condition on the right, and finally evaluates the conditions with
regard to the logical operators used to combine them. If the
equation is true, the instrument triggers the designated action.
Equations using three or more conditions are also evaluated from
left to right. Consider the two equations that follow. Both
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