Owner's manual

User Guide
17
Refer to Appendix B for the checksum algorithm.
11.1 Visibility Only messages (CS120 emulation)
Basic Format, Visibility Only
STX
Message ID
Sensor ID
System status
Visibility distance
Visibility units
Checksum (CCITT)
EXT
Carriage return
Line feed
0x02
0
M or F
XXXX
0x03
0x0D
0x0A
Partial Format, Visibility Only
STX
Message ID
Sensor ID
System status
Message interval
Visibility distance
Visibility units
User alarms
Checksum (CCITT)
EXT
Carriage return
Line feed
0x02
1
M or F
0 0
XXXX
0x03
0x0D
0x0A
Full Format, Visibility Only
STX
Message ID
Sensor ID
System status
Message interval
Visibility distance
Visibility units
Averaging duration
User alarms
System alarms 10 characters
Checksum (CCITT)
EXT
Carriage return
Line feed
0x02
2
M or F
0 0
0 0 0 0 0…
XXXX
0x03
0x0D
0x0A
NOTE