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AppendixA:Fahrenheit conversion of Centigrade data
The type of the network variable of the temperature currently used by LM ADAPTER is SNVT_temp_p, and
expresses temperature data with Centigrade.By local remote controller or the system controller, the Fahrenheit is
used for a temperature display and Centigrade data is used for communication between units.
The conversion table of the Fahrenheit and Centigrade is shown in Table-1.
The network variables and configuration properties which use this conversion table are as follows.
SetPoint - nviSetP_n
SetPoint state - nvoSetP_n
Space Temperature - nvoSpaceTemp_n
Lower Setpoint Cooling - nciCoolLrSetP
Upper Setpoint Heating - nciHeatUpSetP
Table-1
Conversion table for C/F
Centigrade
value(℃）
Fahrenheit
value(°Ｆ)
Room air temp.
Temp. setting
39 102
38 100
37 99
36 97
35 95
34 93
Room air
Temperature
33 91
32 89
31 88
30 87
29 85
28 83
27 81
26 79
25 77
24 75
23 73
22 71
21 69
20 (68)*1
19 67
18 65
17 63
Temperature
setting range
16 61
15 59
14 57
13 55
12 53
11 52
10 50
9 48
8 46
7 45
Room air temperature display range 46°F to 102 °F
Temperature setting range 63°F to 87°F
*Cool/dry operation:67 °F to 87°F
Heat operation : 63°F to 83°F
Auto operation : 67°F to 83°F
*1:68-degree-F use only a room air temperature display.
A temperature setup cannot be performed on the controller. Moreover, it is referred to as 67-degree-F
when 20-degree-C is receive.
Cautions
- Local remote controller and the temperature display of a system controller will be 2-degree-F unit.
- When the conversion formula of the Fahrenheit and Centigrade is used, an error arises.