Omega Vehicle Security CN3271 Series - Manual (Page 21)

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Limiter function Limiter function Limiter function Limiter function Limiter function
The relay of the output 1 operates in fail-safe mode
(relay de-energized during shutdown condition) and
latching mode.
The OUT 1 turns OFF when:
- The instrument is configured as a high limiter
(C1 = Hi) and the measured value is greater than
limiter threshold [“Su” parameter (see Operative
parameters”)] or
- The instrument is configured as a low limiter (C1
= LO) and the measured value is less than
limiter threshold [“Su” parameter (see Operative
parameters”)] or
- The instrument is configured as a high/low
limiter (C1 = HiLO) and the measured value is
greater than “Su” parameter (see Operative
parameters”) or less than “S1” parameter (see
Operative parameters”).
The Out 1 remains OFF until the condition which
generated the shutdown, no longer exists and the
acknowledge action has been performed.
The upper display flashes during a shutdown and
returns to a steady display when the shutdown
condition no longer exists.
When the OUT 1 is OFF the RESET LED is ON [if the
selected rearming mode is equal to 0 (C2 = 0)] or flashes
[if the selected rearming mode is equal to 1 (C2 = 1)].
When the selected rearming mode is equal to 1
(C2 = 1) the RESET LED is steady ON when OUT 1
is OFF and acknowledged.
The shutdown condition can be stored in permanent
memory (see C4).
Acknowledgment can be performed by pressing the
RESET key, by momentarily closing the external dry
contact or by a command from the serial link.
The length of the shutdown condition and max/min
measured values are stored in memory and available
for viewing (see “Normal Display Mode”) until the next
shutdown condition occurs.
These informations are lost at power down.
During a shutdown condition the max/min measured
values are continuously updated and can be monitored.
Example 1 - C1 = Hi and C2 = O
Example 2 - C1 = Hi and C2 = 1
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