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).

EMARKS SET/GET.

EMOTE Yes.

XAMPLE 12225 sdi

12225 sdi AWmVd 3 0 M0 0x9 0 M2 0x20 7 M5 0x1 0

DATASDI

AVAILABLE FOR

A731 A733A732 A733GSM

DESCRIPTION Returns a slot of SDSI-12 sensor data, if any.

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.