Barnett Engineering ProTalk Plus B1290, Руководство по эксплуатации, Страница: 39 / 82

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Exit to Enter Program Code prompt
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: Alarm Input Setup
Alarm Format
This parameter changes the format of the B1290 alarm inputs to match the
output of your monitoring devices in the field. Normally open inputs indi-
cate an alarm when the input is grounded, and when the ground signal is
removed, the alarm is interpreted as having cleared. Normally closed in-
puts are grounded in their normal state, and open when an alarm occurs.
Latched inputs recognize a pulse as an alarm. After the pulse has disap-
peared, the input is deemed to be in the alarm condition until it is acknowl-
edged.
Note: A latched alarm should provide a short, predictable pulse to the input
of the ProTalk Plus; otherwise, it may have to be acknowledged twice. If
the alarm is acknowledged while the input is active, the alarm will not be
cleared and new alarms will not activate that input.
B1290: Alarm Format is …
YOU:
0**
Normally Open
1**
Normally Closed
2**
Normally Open, Latched
3**
Normally Closed, Latched
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Next
Default: 0 (normally open)
Alarm Timer (Debounce) Timescale
The debounce timers on the alarm inputs can operate with a resolution of .1
seconds or .1 minutes. When the B1290 speaks ‘seconds’ for this value it is
indicating that the timer is counting in .1 second steps and when it speaks
‘minutes’ it is counting in .1 minute steps.
B1290: Alarm Timer is seconds
YOU:
0**
Seconds
1**
Minutes
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Next
Default: 0 ( seconds)
38 Program Codes