FIAL 2314, Руководство пользователя

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Model 2314/2316 SNMP Alarm Encoder
Fial Incorporated 2314/2316-042315 51
parenthesis ( button to enclose the OR condition of the two points. Select alarm point “AL6 AC
Power Fail” from the list box, then press the AddPoint button. Next, click on the OR operator
button. Select the second alarm point “AL8 AC Power Fail 2” from the point list box and again
press the AddPoint button. Finally, press the close parenthesis ) button to finish the
expression (see Figure 39).
Figure 39. Creating a Complex Boolean expression
This expression will assert the Boolean Alarm point only if alarm point 1 is unasserted
(false) and either alarm point 2 or alarm point 3 are asserted (true).
The current expression is always displayed in the gray area between the point list and the
buttons. Expressions cannot be edited, other than with a simple Undo operation. Pressing
the Undo button simply removes the last item in the expression. You can keep removing
the last item until you get to the point in the expression you want to change, then enter the
correct item and re-enter the remaining operators and points to finish the expression.
Remember to press the Submit button after all changes have been made. The Submit button
must be pressed to register any changes made on this screen. You can submit changes from
many screens before doing a final Save & Reboot. To actually install the changes, click the Save
& Reboot link on the left side and confirm the request by entering the administrator name and
password.