Honeywell IAQPoint2 User Manual page 64

IAQPoint2™
Holding
Register Bit
Address
b0
b1
b2
b3
b4
b5
b6
b7
40101
b8
b9
b10
b11
b12
b13
b14
b15
40102
40103
40104
40105
40106
40107
40108
40109
40110
40111
40112
58
Modbus Registers
Summary
CO2 sensor good This is true if the CO2 sensor is fitted and has no faults.
VOC sensor good This is true if the VOC sensor is fitted and has no faults.
Heartbeat This bit alternates between true and false every 10 seconds�
Gas Conc low This bit is true if the gas reading is less than the setpoint�
Temp sensor
This bit is true if the temperature sensor is fitted and reading correctly.
good
Temp sensor
This bit is true if the temperature sensor is fitted.
fitted
Reserved for future enhancements�
Reserved for future enhancements�
Humidity sensor
This bit is true if the humidity sensor is fitted and reading correctly.
good
Humidity sensor
This bit is true if the humidity sensor is fitted.
fitted
Reserved for future enhancements�
Reserved for future enhancements�
Occupied Timer
This bit is true if the occupied timer inside the IAQPoint2 is running�
Running
Relay Fitted This is true if the backplate contains the optional relay�
Relay Energized This bit is true if the relay is energized�
Reserved for future enhancements�
This reports gas concentration. If the CO2 sensor is fitted this will report in ppm
Gas displayed
from 0 to 5000. If the VOC sensor is fitted this will report the air quality index from
reading�
0 to 100� If the gas sensor is faulty this will report 32767�
This reports temperature in tenths of a degree Celcius� (For example, the tem-
Temperature C
perature of a human body would be reported as 370�) If the temperature sensor is
observed
faulty or absent this will contain -2730�
rH reading, ob- This reports the relative humidity in percent from 0 to 100� If the humidity sensor
served is faulty or absent this will contain -1�
CO2/VOC set-
This contains the gas setpoint� The scaling is the same as register 40102�
point
Temperature C
This contains the temperature setpoint� The scaling is the same as register 40103�
Setpoint
RH setpoint This contains the relative humidity setpoint�
This counts forever up from 1 to 10000 and then repeats� Some Modbus masters
Heartbeat
may need this to confirm the communication is working.
Reserved for future enhancements�
Reserved for future enhancements�
Writing a 1 to this will cause the "Occupied" icon to appear on the LCD� Writing
Write Occupied
anything other than 0 or 1 is illegal�
Writing a 1 or 0 to this will activate the relay when appropriately configured. Writ-
Write Relay
ing anything other than 0 or 1 is illegal�
Detail