Aprilaire 8800 - Page 9

CT
Temperature or humidity controller configuration COS: N/A
Permissions: Read only
Query
Command
Syntax: SN[#] CT?<CR>
Description: Requests the controller configuration setting.
Response Syntax: SN[#] CT=[value]<CR>
Example: SN1 CT=0<CR>
Node address 1 responds with a controller configuration of thermostat.
Parameters Range
value: controller setting code [0 – 1]
0: temperature controller (thermostat node)
1: humidity controller (humidistat node)
DIF1, DIF2, DIF3, DIF4
Stages 1 – 4 differential settings COS: N/A
Permissions: Read/Write
Query
Command
Syntax: SN[#] DIF[n]?<CR>
Description: Requests the stage [n] differential.
Example: SN[#] DIF1?<CR>
Assignment
Command
Syntax: SN[#] DIF[n]=[value]<CR>
Description: Sets the stage [n] differential to [value].
Example: SN1 DIF2=3<CR>
Response Syntax: SN[#] DIF[n]=[value]<CR>
Example: SN1 DIF1=1<CR>
Node address 1 responds with stage 1 differential setting of 1.
Parameters Range
n: equipment stage [1 – 4]
1: 1st stage
2: 2nd stage
3: 3rd stage
4: 4th stage
value: differential setting code stage 1: [0 – 9]; stages 2-4: [1 – 9]
0: reserved
1: 1F or 0.5C
2: 2F or 1.0C
3: 3F or 1.5C
4: 4F or 2.0C
5: 5F or 2.5C
6: 6F or 3.0C
7: 7F or 3.5C
8: 8F or 4.0C
9: 9F or 4.5C
NOTE: Sending a DIF1 assignment command with a value of 0 resets the thermostat.
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