User's Guide ______________________________________________________________________
182 _________________________________________________________________ M210667EN-C
The automatic message interval is selected with the command
SET
MESSAGE INTERVAL
. The message interval is given in seconds. An
interval of zero which ignores the automatic sending, is used when the
messages are polled. The command format is as follows:
SET MESSAGE INTERVAL
Message_interval
The following command selects the message to be sent once a minute:
SET MESSAGE INTERVAL 60
The following command cancels the automatic sending:
SET MESSAGE INTERVAL 0
Polled Mode
In the polled mode the LT31 system sends a data message when the host
computer transmits a polling command. The automatic message sending
mode is disabled by setting the message interval to zero with the
following command:
SET MESSAGE INTERVAL
0
The polling command format is as follows:
%
LT<id><
message_number
>
-
where
%
= The ASCII character number 5 (CTRL + E)
id
= The identifier selected in configuration; if replaced
by blank space all LT31 systems on the line will
respond
message
number
= Optional message identifier (two characters); if the
message number is omitted, the sensor answers with
the default message selected with the
SET
MESSAGE TYPE
command
-
= CR
(ASCII
13)
Examples of polling commands:
%
LT
-
= If only one LT unit is on the line (no ID is
necessary)
%
LTA03
-
= The LT31 unit A (ID = A) is polled for message
number 03 (status message). This is used when
several devices are on the same line.