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Model 2314/2316 SNMP Alarm Encoder
Fial Incorporated
2314/2316-042315
21
Multiplier: Enter the Multiplier for the selected Analog. The Offset is added to the raw Analog
measurement; the result is then multiplied by the Multiplier to calculate the Alarm Value.
Negative multipliers may be entered if you wish to reverse the sign or polarity of the value
measured.
Differential: Select Yes if the Selected Analog input is differential, or No if the selected Analog
input is single-ended. Single-ended measures the electrical potential between an analog input
pin and ground. Differential measures the electrical potential between a pair of pins,
irrespective of their relationship to ground. For differential inputs the pairing is fixed: Input 1 is
paired with input 2, input 3 with input 4, input 5 with input 6 and input 7 with input 8. Note that
this is different from a 2311 pairing of 1 with 9). You can have a mix of single-ended inputs
and differential-pair inputs in one unit.
Range: The analog input range is fixed at negative 90 volts to positive 90 volts. The inputs auto-
range and show values to two decimal digits of precision.
After all changes have been made, press the Submit button. 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.
Note: As you submit changes, the entries in the alarm table will change, but the Value and Alarm State
columns will reflect pre-existing measurements settings currently in effect. You will not see your changes
reflected in the Value column until you save and reboot. In other words, you can change a multiplier from 1
to 1000 and units from Volts to millivolts, but the Value column will show a Volts reading obtained with the
original multiplier until you Save & Reboot.
The Boolean Alarms Page
Boolean (composite) alarm points are virtual alarm points created by combining the true/false states of
standard hardware alarm, status, analog and control points using Boolean operators (‘AND,’ ‘OR,’ ‘XOR’
and ‘NOT’). By combining hardware points this way, you can create an expression (a Boolean alarm) that
will be true if the true/false state of all of the individual points satisfy the expression. Note: Boolean alarm
points cannot include other Boolean points, only standard hardware points.
To provision or modify a Boolean point, click the Boolean Alarms link in the left pane. The Boolean Alarms
page will appear (see Figure 17), displaying a table of currently defined Boolean Alarms and an edit
Boolean Alarm point dialog section.
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