Campbell Scientific 0871LH1 Freezing Rain Sensor - Manual (Page 24)

9
Ice Detector RS-422 String Format
Table 8. Serial String Format
Byte
Bit
D
e
finition
Com
m
ents/Interpretation/Range
0 (First)
7 (MSB)
String ID
Presently defined as 00
6
May add addi
ti
onal
stri
ngs i
n
future
5 - 3
Unused
2
Probe Heater State
1- Heater On 0- Heater Off
1
Ice Output
1- Ice 0- No Ice
0
Status Output
1- Fai
l
0
- (O
K
) N
o
F
a
il
1 -2 MSO FREQUENCY
MSO Count i
n
Hex
Frequency = 774060000/Dec (MSO)
3 - ERRSTAT1
7
Unused
1 = Active
6
M
S
A
Fail, To
o
H
ig
h
5
M
S
O
Fail, T
o
o
Lo
w
4
EEPROM Fail
3
RAM
Fail
2
ROM
Fail
1
Watchdog Fail
0
Pow
er Interrupt Tim
e
r Fail
4 - ERRSTAT2
7 - 6
Probe Heater Failure
00 = Probe Heater OK 01 = Probe Heater Always ON or OPEN 10 = Probe Heater Always OFF 11 = Probe Heater ON with 1 Enable
5
De-Icing Fail
1 = Active
4
Unused
3
Unused
2
Unused
1
Unused
0
Unused