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F4000 MXP Engineering / Technical Manual Document: LT0273
Event Log and Status at MX4428
Page 6-2 24 March 2006 Issue 1.5
6.1 RETURNED ANALOG VALUES
The MXP returns up to 4 different analog values per device - CV, TV, HH, and HL. The
following table details what each value means for each device type.
Type CV TV HH HL
814H Temperature
Current Value
ROR History High
of Temperature SLV
History High of
ROR SLV
814PH Smoke CV Smoke TV HH percent*
(max% of Temp SLV,
Temp ROR SLV,
Smoke SLV)
Temp CV
814CH CO CV CO TV HH percent*
(max% of Temp SLV,
Temp ROR SLV,
CO SLV)
Temp CV
814I Current Value Tracked Value History High of SLV History Low of
SLV
MIM800 analog i/p – History High History Low
MIM801 analog i/p – History High History Low
CP820 analog i/p – History High History Low
CIM800 analog i/p 1 analog i/p 2 Hist High (both) Hist Low (both)
DIM800 analog i/p 1 analog i/p 2 Hist High (both) Hist Low (both)
SNM800 EOL Supervision Supply
Supervision
History High EOL
Supervision
History Low EOL
Supervision
LPS800 Analog i/p 0
(while not
operated)
Analog i/p 1
(while not
operated)
History High of analog
i/p 0 (while not
operated)
History Low of
analog i/p 0 (while
not operated)
RIM800 – – – –
VLC800 Current Value Fixed at 12 History High %* 0
*HH percent will indicate whichever of Temperature, Rate of Rise, or Smoke/CO has been
highest, in terms of the percentage of its alarm threshold. It will be rounded to the nearest
5%, and the last digit will indicate which type it represents. A last digit of 0 or 5 indicates
smoke or CO. A last digit of 1 or 6 indicates temperature, and a last digit of 2 or 7 indicates
temperature rate of rise.
For example, 51 will indicate that temperature has been highest at 48-52% of the alarm
threshold. 65 will indicate smoke/CO has been highest, at 63-67% of the alarm threshold.
For temperature 20°C will be 0% and the alarm limit 100%.
All History High and History Low values (where used as maximum and minimum) will be
based on Step Limited values i.e. the same values as are used for alarm comparison.
However note that PreAlarm comparisons are performed using “CV”, i.e. values without Step
Limited filtering. Therefore a PreAlarm may occur even though the “History High” value is
less than the PreAlarm Threshold.