Adcom A720 Mobility Aid User Manual


 
CHAPTER 4
Using terminal commands
37
DESCRIPTION Returns data stored for a certain device.
PARAMETER The ID of the device for which the data is requested and the date/
time (in the standard format) the data was stored. If missing, then it
refers to the data of the local device.
RETURNS A data block.
REMARKS GET only. If you don’t include the date/time parameter, the latest
data is returned. If you include the date/time parameter, the date
and time closest to, but later than, the given date/time is returned.
REMOTE Yes, for a GET on the A720B and A723, but only one frame at a
time. If you are using a terminal window for the A720, you cannot
issue the DATA command remotely. If you are using a terminal win-
dow for the A720B, you can issue a DATA command for an A720 or
A723 RTU, but you cannot issue the command for the A720B
receiver. In other words, the base station can issue a remote com-
mand for an RTU, but it cannot issue such a command for itself.
The A720 RTU can issue the command only for itself, and only
locally, while the A723 RTU can also issue remote data commands.
EXAMPLE DATA 5666 12/12/1998 12:12:12
193 DATA b1 b2 b3 ... bn 0
#
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
ft is the frame type (38 for addIT devices)
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 A720 devices respond with a type 38 data frame, while the
A723 may respond with type 38 or type 39, depending on the CM
flag (see also “CM” on page 34). The most important difference