Campbell SAT ARGOS Bedienungsanleitung Seite 215

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ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048
Page 207
The description of this process in Appendix D, Line Item #5 (the Alarm Set-point) is set to 11 and Line
Item #6 (the Alarm Reset) is set to 12. When the value referenced by Line Item #4 (the Input for Data)
falls below 11, the Alarm Process will indicate that an alarm condition exists. Conversely, when the
value referenced by Line Item #4 goes above 12, the alarm condition will be reset.
In this example, you are setting an alarm based upon measured battery voltage. You can set Line Item #4
to the actual Sensor Record reading the battery voltage, or you might want to base the alarm condition on
an average of multiple battery voltage readings.
If you use the latter, the Alarm Process Record may look as follows:
PROCESS MENU
(Cn/m) Change Item n To Value m (Jn) Jump To Record n
(A) Insert After This Record (N) Go To Next Record
(B) Insert Before This Record (P) Go To Previous Record
(X) Cut Record to Clipboard (XA) Delete ALL Records
(C) Copy Record To Clipboard (Z) Zeno Program Menu
(V) Paste Record From Clipboard (H) Help
(Sn/m) Search Item n for Value m
Process Items for Record 3 of 3:
Item 1: Process Category 3 : Alarm
Item 2: Process Number 3 : Alarm Process
Item 3: User-defined Process Name
Item 4: Input for Data P2.1 : AvgBatt
Item 5: Alarm Setpoint 11
Item 6: Alarm Reset 12
Item 7: BIT Flag Number (1 - 31) 0
Item 8: Digital Output Channel 1 0
Item 9: Digital Output Channel 2 0
Item 10: Switched Voltage 0
>
Line Items 8 through 10 in the Alarm Process show that you can turn on one or two digital output
channels, and/or a switched voltage, when an alarm condition is met. An example of this would be
turning on a heater if the temperature falls below a critical value.
If you set a value in Line Item #7 it will set the specified bit in the Global Built-In-Test (BIT) when the
data referenced in Line Item #4 goes beyond the alarm set-point in Line Item #5.
11.2. CREATING AN ALARM MESSAGE
Once you identify the alarm condition, you will need to tell the ZENO
®
-3200 what information to
transmit when the alarm condition is met.
Depending upon the type of communications interface used, there are several options available when you
create an alarm message. If you are using a non-satellite communications link, the following options are
available to you:
Transmit the same primary output message for your alarm message as for regular data.
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