Lighthouse REMOTE Active Count, Operating Manual

Page: 51 / 62

MODBUS Register Map v1.49
248083401-1 Rev 5 A-13
Data and
Alarm
Registers
Data and Alarm Enable Registers
The Data and 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:
<High Bytes><Low Bytes> = <4 Byte Data Item>
The 43xxx register series is used to determine which particle data
channel is ENABLED and which are set to ALARM ENABLE. These
registers supersede the older Data Enable Registers (31xxx) which
have been obsoleted.
m Meters Bar Bar
ft^2 Square feet mBar Milli-bar
m^2 Square meters V Volts
ft^3 Cubic feet mV Milli-volts
m^3 Cubic meters A Amperes
L Liters mA Milli-amps
CFM Cubic feet per minute Ohm Ohms
CMM Cubic meters per minute mOhm Milli-ohm
L/m Liters per minute p/f3 Particles per cubic foot
p/m3 Particles per cubic meter LPM Liters per minute
PCT Percent MLPM Milliliters per minute
SEC Seconds IHG Inches of mercury
p/L Particles per liter p/ml Particles per milliliter
Table A-12 Data Units
Units Description Units Description
Table A-13 Enable/Disable Bits
Bit Description
0 DATA ENABLE (0=disable; 1=enable)
1 ALARM ENABLE (0=disable; 1=enable)