Vaisala Hydromet Data Collection Platform - Manual (Page 122)

User's Guide ______________________________________________________________________
120 _________________________________________________________________ M210933EN-C
Ceilometers
Ceilometers produce almost equal data using the same data messages.
The default communication parameters for service and data port are as
follows:
The sensor commands for interface configuration are as follows:
Message availability by sensor type is as follows:
Parameter Value
Speed 2400 bps
Parity even
Data 7
Stop 1
Handshake none
Operation Command(s) Description
Set polled SET MESSAGE TYPE
<type>
SET MESSAGE MODE
POLLING
Sets message type, where
<type> is MSG1, MSG6 or
MSG 61. Disables automatic
transmission.
Set auto tx SET MESSAGE TYPE
<type>
SET MESSAGE MODE
AUTOSEND
Sets message type, where
<type> is MSG1, MSG6 or
MSG 61. Enables automatic
transmission.
Set ID SET UNIT_ID <ID> Sets unit ID, where <ID> is a
single character 1...Z.
Set interface
type SET PORT DATA
INTERFACE <type> Sets interface type for the
data connection. <type> is
RS-232 or RS-485_2W.
Sensor Messages
CT25 1,6
CT25KAM 1,61
CL31 CT25 message 1,6
NOTE In order to have messages 6 or 61 available, you need to purchase the
sky condition option separately.