ZyTemp TN905-05F, Руководство пользователя

Страница: 13 / 16

TN9 Infrared Thermometer Module
http://www.ZyTemp.com
REV. 07/20/2004
4.2.1 Format of Message
Item MSB LSB Sum CR
Item
“L”(4Ch): Tobj (Temperature of Obj)
“f”(66h): Tamb (Ambient Temperature)
MSB
8 bit Data Msb
LSB
8 bit Data Lsb
Sum
Item+MSB+LSB=SUM
CR
0Dh, End of the message
4.2.2 Example
1.
Object Tempurature(Tbb)
4C(hex) 14 2A 8A(hex) 0D(hex)
Item
4Ch  “L” the item code of Object tempurature
Data
MSB 14h ( “1” and “4” are ASCII char)
LSB 2Ah( “2” and “A” are ASCII char)
Real Tempurature Value [Hex2Dec(142Ah)]/16-273.15= 49.475
℃
Sum
CheckSum 4Ch+14h+2Ah=8AH ( Only Low Byte )
CR
0Dh  ’Carriage Return’ means End of Message
2. Ambiant Tempurature(Tamb)
66(hex) 12 C3 3B(hex) 0D(hex)
Item
66h  “f” the item code of Ambient tempurature
Data
MSB 12h ( “1” and “2” are ASCII char)
LSB C3h ( “C” and “3” are ASCII char)
Real Tempurature Value [Hex2Dec(12C3h)]/16-273.15= 27.03
℃
Sum
CheckSum 66h+12h+C3h=3Bh ( Only Low Byte )
CR
0Dh  ’Carriage Return’ means End of Message