
Command protocol
9-5
9.3 Query commands
Using these commands the LR-01 can be queried with a series of requests
to which the repeater responds.
Query commands are characterized by the character
?
in the string.
TABLE 9-1 Query commands
?ADR
This query command
#LR?ADR*
requests the unit’s address that represents the additional
prefix that can be set by the User to distinguish a specific unit. It will be accepted and
recognized, by that specific unit only, in the same way as the default prefix “LR” which is
always valid for all units.
The reply is a string showing a number between 0 and 99.
Example of reply
: ADR=00
which means that the address of the unit is 00.
?ALR
This query command
#LR?ALR*
requests the Alarm threshold.
The reply provides the threshold in the current unit followed by the averaging time, in
minutes.
When the connected probe is a EHP-2B-xx, it returns the alarm threshold for the Electric
Field.
When the connected probe is a weighted model, the unit shown is %.
Examples of reply
: ALR=6.0 uT; 6.00 min.
ALR=25000.00%; 30.00 min.
?ALT
This query command
#LR?ALT*
requests the relative altitude.
The reply provides the altitude in meters relative to the reference position which is acquired
when the LR-01 is switched on or when the SALT command is sent or when a new Log
begins.
The adopted formula is: alt=(2.0*1006.0)/(7.0*9.81)*Tk*LN(ref_Press/cur_Press)
Example of reply
: ALT=30
?AQ_
This query command
#LR?AQ_*
requests the Logger settings.
The reply format is:
AQ_=m; x; t
where:
•
m
is the acquisition mode setting:
A
= AVG;
R
=RMS;
I
=Instantaneous
•
x
represents the timing of the logger, in seconds, 1 s minimum and 900 s
maximum. When x=0, the Logger is disabled. When x=-1, the Logger is triggered
only by pressing the Button and, just in case, by the Alarm (please refer to MSK
command).
•
t
is the Logger type:
32
= compact,
64
= complete
Example of reply
: AQ_=R; 30; 32
which means that the unit is set to store data every 30
seconds, the averaging is RMS and the Log is of the compact type where each record has
a size of 32 bytes and does not contain position information.
Содержание LR-01
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