Lighthouse ApexPortable Operating Manual
A-8
248083440-1 Rev 5
Alarm and
Threshold
Registers
Alarm Enable Registers
The Alarm Enable input registers (43xxx series) are read/write. All
enable data items are 4 bytes long and are stored across 2 registers.
Byte and word ordering is big-endian. Thus, data items are formed by
placing the high bytes in front of the low bytes. For example:
Note:
These registers
currently apply only to
ALARM enable/disable,
not
to Channel enable/
disable.
<High Bytes><Low Bytes> = <4 Byte Data Item>
The 43xxx register series is used to determine which particle data
channels are set to ALARM ENABLE.
These registers run in parallel with the data registers (30xxx series).
For example, data register 30010’s enable alarm register would be
43010. Data register 30016’s enable alarm register would be 43016.
Note:
Alarm Enable
currently only works for
Particle Channels. Any or
all channels and their
alarm thresholds can be
enabled and configured
independently of each
other.
To enable the Alarm for a particle channel, set the bit in the low word of
that channel. Because Bit-0 is reserved and must always be ON, only
Bit-1 will change for any channel alarm setting and Bit-0 must always be
written as a ’1’. What this means is that these registers will receive a ’3’
to turn the setting ON and a ’1’ to turn it OFF.
Particle data registers for the Alarm Enable setting start at 43009 for
the high word and 43010 for the low word for channel 1.
13
Set Real Time Clock.
Writes "Data Set" values (from Registers 40035 & 40036) to the
local Real Time Clock. New time value is saved.
Table A-6 Command Register
Value
Action
Table A-7 Alarm Enable/Disable Bits
Bit
Description
0
CHANNEL ENABLE (0=disable, 1=enable)
1
ALARM ENABLE (0=disable; 1=enable)
2
RESERVED
Table A-8 Alarm Enable Registers
Register Data
Type
Description
43009
unsigned int Alarm Enable for Particle Channel 1 [high]
(smallest particle size starts here)
Summary of Contents for ApexP3
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