Lighthouse ApexRemote Operating Manual
A-12 248083447-1 Rev 1
Note: The Table A-11
shows the registers for an
8 channel particle counter.
Counters with fewer
channels do not use the
extra registers. The
smallest particle channel
starts at the xxx09 position.
The Data Status flag is set if any of the channels have a threshold
exceeded state as true.
The threshold registers (45xxx series) run in parallel with the data
registers (30xxx series). For example, data register 30010’s
corresponding threshold register would be 45010. Data register 30016’s
threshold register would be 45016.
Setting the Alarm Threshold Value
Note:
Thresholds are
independent of each so the
value set for one channel
does not affect another.
The Alarm Threshold Value is set in the low register of the channels.
Each channel has independent threshold value registers. Setting a value
for channel 1 as 100 will not affect channel 2 setting of, say, 500.
Data
Registers
Data is stored in the input registers (30xxx series), which are read-only.
All data items are four bytes long and are stored across two registers.
Byte and word order is big-endian. Thus, data items are formed by
Table A-11 Alarm Threshold Registers
Register Data Type Description
45009 unsigned int Threshold for Particle Channel 1 [high]
(smallest particle size starts here)
45010 unsigned int Threshold for Particle Channel 1 [low]
45011 unsigned int Threshold for Particle Channel 2 [high]
45012 unsigned int Threshold for Particle Channel 2 [low]
45013 unsigned int Threshold for Particle Channel 3 [high]
45014 unsigned int Threshold for Particle Channel 3 [low]
45015 unsigned int Threshold for Particle Channel 4 [high]
45016 unsigned int Threshold for Particle Channel 4 [low]
Table A-12 Alarm Threshold Registers set to 1000
Registers
Particle
Channel
Threshold
Value
45009 - 45010 1 1000
45011 - 45012 2 1000
45013 - 45014 3 1000
45015 - 45016 4 1000
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