User's Manual

Performing Advanced Functions
Note: For further information about the significance of the above terms please consult
also the SDI-12 standard specification, version 1.3 (http://www.sdi-12.org).
R
EMARKS SET/GET.
R
EMOTE Yes.
E
XAMPLE 12225 sdi
12225 sdi AWmVd 3 0 M0 0x9 0 M2 0x20 7 M5 0x1 0
OK
#
DATASDI
AVAILABLE FOR
A731 A733A732 A733GSM
DESCRIPTION Returns a slot of SDSI-12 sensor data, if any.
P
ARAMETERS Offset and date/time, both optional. If an offset is specified, then only the values
after the offset are returned, all other are skipped. The date/time specifies the first
slot to be retrived that is strictly “younger” than the specified time stamp.
RETURNS The data block returned will typically contain a number of data frames (telegrams).
The structure of a block is as follows:
dd mm yyyy hh mm ss si ft d1 d2 ... dn dd mm yyyy ... dn cs
where:
dd mm yyyy is the date
hh mm ss is the time
si is the size of the frame (variable for the SDI frames)
ft is the frame type (60 or 61 for the A733)
d1 d2 ... dn are the data values (the frame content)
cs is a 16-bit checksum obtained by summing the bytes and discarding the
carries over
0xFFFF
The composition of the data block of such a frame (the values marked as d1, d2...
dn) is depicted in Fig. 18, while the digibyte is depicted in Fig. 19.
39