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F3200 Installation & Programming Manual Document No: LT0122
Programming System Configuration
Page 7-8 5 July 2001 Issue 2.7
TIME DELAYS (CONTINUED)
4 Delay Depends on "into alarm time"
For D1 > 0
Inst Alarm 2.3 2.3
Alarm 2.3 + D1 D2
For D1 = 0
Inst alarm .2-.8 seconds .2-.8 seconds
Alarm .2-.8 seconds D2 + .2
Default Settings for Delays
Delay Type D1 D2
2 AVF/RAD 11 -
3 SAD 11 (V2.08 or earlier) 65
0 (V2.09 or later) 65
4 DELAY 30 0 (2.3)
All times are in seconds.
There is a minimum time delay of 2.3 seconds before acceptance of any new state except
for a type 4 (DELAY) circuit with an into alarm time of zero, (D1=0), where the minimum time
is reduced to .4 seconds (typically .4, minimum .2, maximum .8 seconds).
D1 and D2 are programmable to 0-250 seconds but if set to zero, a minimum delay of 2.3
seconds ( or .4) is still applied.
Hence for a type 4 circuit with D1=0, D2=5, the into alarm delay is .2 to .8 seconds and the
out of alarm delay is 5.2 - 5.8 seconds. For a type 4 circuit with D1=30 and D2=0, the into
alarm delay is 32.3 seconds and the out of alarm delay is 2.3 seconds.
Type 4 circuit with into alarm delay of zero
The into alarm time for both detector operated (alarm) and for mcp (instant alarm) is .2 to .8
seconds (typically .4 seconds). The delay into and out of fault and out of instant alarm is
also .2-.8 seconds. The delay out of alarm is the out of alarm delay (D2) with a minimum of
.2-.8 seconds.
Note that programming an AZC for any time delay type resets programming of voltage bands
B1 and B3 for that AZC to the default options. (These can be subsequently re-programmed,
see Section 7.2.5).
SAD & Delay Types
SAD and Delay circuits (types 3 & 4) with D2 greater than zero, require non-latching
detectors. The corresponding zones must also be programmed as non-latching.
AVF/RAD Sequence
Recognition of a detector's first operation occurs after 2.3 seconds. However, with AVF this
does not generate alarm immediately.
A delay of 3.4 seconds occurs and then the circuit is reset for 5.3 seconds. The circuit is
then re-energised and ignored for 2.3 seconds. The sum of the delay, reset and ignore
periods (default = 11 seconds) equals the D1 value, with alteration of D1 only affecting the
delay period. E.g. setting D1 to 30 will provide a 22.4 second delay, followed by the reset
and ignore period.
If the detector re-operates in the following 150 seconds then an alarm is generated
immediately. If it does not the sequence re-starts.