Virtual Function Block - Honeywell Apex Technical Handbook

MAN0604_Issue 09_02-2013 Apex
2110M8030
APPENDIX A - SPECIFICATIONS
nvoCellLife output
This variable reports the total cell life remaining. This is cell type specific, but is typically set for new
cartridges at 2 years of service. It is reported in hours of life.
NvoNextCal output
This variable reports when the next calibration is required. The default is 6 months of service
between calibrations. It is reported in hours (interval starts at 4320hrs and counts to zero).
nvoLastCal output
.
This variable indicates the time since last calibration, counting back from current time
nvoCellType output
This string contains the name of the gas that the installed cartridge is capable of detecting. It is the
same string that appears on the front panel of the transmitter. For example cO or hF. This has a 5
character maximum.
nvoConc output
This is the gas concentration as a floating point number. The units are the same as
nvoAlarmThresh1, see above.
nvoConcFS output
This floating point number reports the maximum concentration that the installed sensor is capable of
measuring. The units are the same as nvoAlarmThresh1, see above.
nvoConcType output
This string contains the measurement units for the installed cartridge. Possible values include ppm,
%V/V and %LEL.
A.4.4 Virtual Function Block
The four network configuration inputs appear in a virtual functional block in Echelon LonMaker3.
nciMaxSendT input
This controls the time period between updates of bound but unchanging network variable outputs.
The default is 20 seconds but this can be changed from 1 to 59 seconds depending on installation-
specific needs.
nciAlarmSetT input
Reporting of alarm events over LonWorks may be delayed by up to 59 seconds by setting this
parameter to a non-zero value. However this has no effect on alarm reporting over the analog
current loop or the local relays.
This is included to suppress ephemeral alarm events which may be caused by fluctuations in
temperature, pressure, or humidity or by strong radio-frequency interference. The default value of
zero is recommended for most applications.
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