Campbell SAT ARGOS Bedienungsanleitung PDF herunterladen (Seite 339)

ZENO

-3200 USER MANUAL

Coastal Environmental Systems (206) 682-6048 Page D-35

The Missing Sensor Data Process allows the setting of an alarm condition when the inputted data value is

set to a BSV and allows replacement of a BSV with a substitute value. The first data output from this

process is the alarm condition, which is set to one if the inputted data value is a BSV; otherwise, it is set

to zero. The second data output is the inputted data value (Line Item #4) when it is NOT a BSV;

otherwise, it is the substitute, default value specified by Line Item #5.

3.9. Multiple Alarm Process

Inputs: 4-11 Data inputs, preferably from other alarm processes (D)

12 Number of input alarms required for output alarm (U)

13 Digital I/O port number, 18 to 23 (U)

14 Digital I/O port number, 18 to 23 (U)

15 Output Message Number, 1 to 4 (U)

16 Log Alarm Message, 0 = no or 1 = yes (U)

Outputs: 1 Status

0 no alarm condition

1 alarm condition

E1 Process Error Code

Assumptions: Input numbers 1 through 8 are alarm inputs

Activates a digital output (5 VDC), and initiates modem dial-out, on

certain combinations of alarm conditions (see below)

The Multiple Alarm Process allows the user to define an alarm condition that is the result of a

combination of conditions. Up to eight individual input values can be referenced by Line Items #4

through #11. Each of the input values is interpreted in a Boolean fashion: 1) no condition exists if the

input value is zero or 2) the condition does exist when the input value is non-zero. Line Item #12 defines

how many (N) existing conditions from Line Items #4 through #11 constitute an alarm condition.

Here is an example of four separate conditions:

 Let Line Item #4 reference an alarm process triggered when the temperature goes below freezing

 Let Line Item #5 reference an alarm process triggered when the wind speed exceeds 25 knots

 Let Line Item #6 reference an alarm process triggered when the air temperature drops below the

dewpoint

 Let Line Item #7 reference an alarm process triggered when the barometric pressure drops below 30

inches of mercury

To continue the example, an alarm condition does not need to be reported when only one or two of the

listed conditions exists; but an alarm condition does need to be reported if at least three conditions exist

simultaneously. Therefore, Line Item #12 would be set to 3 and the Multiple Alarm Process will be

triggered when at least three of the four conditions is present.

When the Multiple Alarm Process determines that an alarm condition exists, data output #1 will be set to

one; otherwise, it is set to zero.

The digital outputs, switched voltage and logging an alarm message

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are set slightly differently from

data output #1. If less than N of the input values is non-zero, then the digital outputs (if defined) and

switched voltage (if defined) are set low. The first time that N or more input alarms are non-zero, if

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Refer to Section 11.3.

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