Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
33
4.4 Data Messages
The following standard messages are provided:
Data message No. 1, 2, 3, 6 and 7.
ANet / INet communication with DMX611.
Status message S.
Each port can be set to transmit a specified message automatically.
Alternatively the port can be set to transmit the set message only when polled
by a predetermined polling string of characters, or the polling string can
contain the message identification.
NOTE
All characters are 7-bit USASCII.
↵ symbolizes Carriage Return+Line Feed (2 characters)
throughout this document.
Start-of-Header, Start-of-Text, End-of-Text, Carriage
Return and Line Feed are non-printing characters in most
practical terminal use.
4.4.1 Data Message No. 1
This message is intended for cloud height/vertical visibility measurement
when no other measurement information is desired. The message includes the
most elementary status information, which enables a host system or operator
to see that no warnings or alarms are present. An example of data message
no.1 is presented below:
(
CTA2010
J
↵ 1st line 11 char.
30 01230 12340 23450 FEDCBA98↵ 2nd line 31 char.
L
↵ 3rd line 3 char.
------------------
total 44 characters
Transmission time and size :
0.18 s at 2400 baud (10-bit char.)
10.6 kbytes/h, 253 kbytes/d, 7.6 Mbytes/mo. at 4 msg./min., uncompressed.
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