Aprilaire 8800 - Page 35

OH
Remote humidity COS: C3
Permissions: Read only
Query
Command
Syntax: SN[#] OH?<CR>
Description: Requests the remote humidity sensor reading.
Response or
COS Message
Syntax: SN[#] OH=[value]%<CR>
Example: SN1 OH=25%<CR>
Node address 1 responds with a remote humidity of 25% RH.
Parameters Range
value: humidity sensor value [--, 0 – 99]
The remote humidity reading source is from Support Module 1, Sensor 2 configured as monitor. If a query command is received and Support
Module 1 is not connected or is temperature only, it responds with SN[n] OH=--%<CR>.
If the value of the remote humidity changes by 1% RH or more, a C3 COS unsolicited message is issued (if C3 is ON).
BIHUM
Built-in humidity COS: N/A
Permissions: Read only
Query
Command
Syntax: SN[#] BIHUM?<CR>
Description: Requests the built-in humidity sensor reading.
Response Syntax: SN[#] BIHUM=[value]%<CR>
Example: SN1 BIHUM=30%<CR>
Node address 1 responds with a built-in humidity of 30% RH.
Parameters Range
value: built-in humidity sensor value [--, 0 – 99]
If the humidity sensor has an error, the response is SN[n] BIHUM=--%<CR>.
RTS
Node remote temperature sensor COS: N/A
Permissions: Read only
Query
Command
Syntax: SN[#] RTS?<CR>
Description: Requests the node’s direct-wired remote temperature sensor (T1 and T2 terminals) reading.
Response Syntax: SN[#] RTS=[value][scale]<CR>
Example: SN1 RTS=68F<CR>
Node address 1 responds with a remote temperature reading of 68°F.
Parameters Range
value: remote temperature sensor value
Fahrenheit [32 – 99]
Celsius [0 – 40]
no sensor attached or error [--]
scale: temperature scale [F, C]
F: Fahrenheit
C: Celsius
If the remote temperature sensor is not attached or has an error, the response is SN[n] RTS=--[scale]<CR>.
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