COSA Xentaur Hygrocontrol Type 72 - Manual (Page 20)

Series 72 Manual page 16
O: (79dez,4Fhex) Output: opens the ring, sends a string of
datas (with address) according to protocol 2 (s.b.).
closes the ring thereafter and so enables further
transmissions.
9.2.3. Protocol 2:
A string of 19-ASCII codes is transmitted with the following content:
STX ADR SPACE DIM SPACE HUMI. SPACE TEMP. CR LF
BYTES 1 2 1 1 1 5 1 5 1 1
DECIMAL 2 s.b. 32 s.b. 32 s.b. 32 s.b. 13 10
HEXADECIMAL 2 s.b. 20 s.b. 20 s.b. 20 s.b. OD OA
ADR:
Address of transmitter in form of 2-decimals (01..99)
DIM:
The dimension will be sent as ASCII-Code. The following codes will be found:
ASCII-CODE TEMPERATURE HUMIDITY
1:
°C rF
2: °C RH
3: °C °Ctd
4: °C °Ftd
5: °C g/kg
6: °C g/m
3
A: °F rF
B: °F RH
C: °F °Ctd
D: °F °Ftd
E: °F g/kg
F: °F g/m 3
Temperature:
The temperature value is sent in ASCII-codes with 1/10° resolution, but without
decimal point. The highest decimal is sent first. Negative values are transmitted
as their dual-complement (16-Bit) without sign. Values bigger than 32767 have
to be transformed with the following equation:
Temperature = transmitted value - 65536
Examples:
a) 00213 is to read 21.3 °C (or °F depending on dimension)
b) 65284 is to read -25.2 °C (or °F depending on dimension)