
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048 Page D-33
This process is used to acknowledge (set to low) an alarm set by either the Alarm Process
351
or the Two-
Range Alarm processes
352
. An alarm can be acknowledged at any time, independent of the Sample
Interval. Once acknowledged, the alarm will not be re-enabled until a new alarm condition exists.
3.6. Two-Range Alarm Process
Inputs: 4 Any sensor or process output representing a high/low threshold
5 Any sensor or process output upon which the alarm is triggered
6 Two-Range Alarm Constants Process Record Number
7 BIT bit number (1 to 31, 0=disabled)
9 Digital I/O port number (18 to 23)
10 Digital I/O port number (18 to 23)
Outputs: 1 Status
0 no alarm condition
1 alarm condition
E1 Process Error Code
Sets a bit flag in the global BIT value
Activates a digital output (5 VDC) if there is an active alarm
condition
Assumptions: The process number specified as input number 4 must be of the type
Two-Range Alarm Constants
This process is described in more detail under the Two-Range Alarm Constants Process.
353
3.7. Two-Range Alarm Constants Process
Inputs: 4 Threshold select decision point
5 First upper limit
6 First lower limit
7 Second upper limit
8 Second lower limit
Outputs: E1 Process Error Code
This process, in conjunction with a Two-Range Alarm Process
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, is used to set an alarm in cases where
there are two distinct alarm thresholds.
The Two-Range Alarm Process and the Two-Range Alarms Constants process are separated to allow
more than one Two-Range Alarm Process to access the same constants.
Line Item #4 of this process defines the threshold that selects which set of limits to use: the first set upper
and lower limits or the second set of upper and lower limits. The following table summarizes how the
constants defined in this process apply to a Two-Range Alarm Process
355
.
351
Refer to Category #3, Process #3.
352
Refer to Category #3, Process #6.
353
Refer to Category #3, Process #7.
354
Refer to Category #3, Process #6.
355
Ibid.
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