Chapter 5 ________________________________________________________________ Operation
VAISALA_______________________________________________________________________ 89
Polling Mode
A port can be set to transmit a message only when polled by a
predetermined polling string of characters. The polling string can contain
the message identification.
NOTE
Ceilometer CT12K messages cannot be polled.
The CL31 unit can be assigned an identification of one-character digit or
letter. The factory setting is 0 (zero).
The polling mode is activated with the following command:
CEILO > set message transmission request
Returning to the normal autosend mode is done using the following
command:
CEILO > set message transmission periodic
The polling string format is as follows:
<
Enq> CLIdNo
where
Enq = Character ENQUIRE = ASCII 05H = control-E.
CL = Fixed ceilometer identifier; CL for CL31 messages, CT for
CT25K and CT25KAM messages.
Id
= Identification character, 7-bit printable ASCII character.
No
= Optional message identifier; 1 or 6 for CT messages and 1, 2
or S for CL messages. The CL identifier 1 returns the default
option for data message No. 1. To return a particular subclass
message, use one of the following identifiers: 11, 12, 13, 14,
or 15. Data message No. 2 is requested similarly: 21, 22, 23,
24, or 25. . The identifier S returns the Status message.
= ENTER (Carriage Return) + Line Feed.
The following are examples of the polling command:
<
Enq> CL112<Enter>
Message 1, subclass 2 from ceilometer No.1
<
Enq> CT11<Enter>
CT25K Message 1 from ceilometer No.1
To Next Page
Loading...
Need help?
General
