Lutron Electronics TM-946 Manual page 22

Each digit indicates the following status :
D15 Start Word = 02
D14 4
Function : T1, T2, T3, T4
D13
When send the T1 value, D13 = 1
When send the T2 value, D13 = 2
When send the T3 value, D13 = 3
When send the T4 value, D13 = 4
Function : T1, T2, T1-T2
When send the T1 value, D13 = 1
When send the T2 value, D13 = 2
When send the T1-T2 value, D13 = 3
D12 & D11 Annunciator for Display
= 01
℃
D10 Polarity
0 = Positive 1 = Negative
D9 Decimal Point(DP), position from right to the
left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D8 to D1 Display reading, D8 = MSD, D1 = LSD.
For example :
If the display reading is 1234, then D8 to
D1 is : 00001234
D0 End Word = 0D
RS232 setting
Baud rate
Parity
Data bit no.
Stop bit
= 02
℉
9600
No parity
8 Data bits
1 Stop bit
20