Rice Lake 920i Installation Manual V2.0 - Manual (Page 91)

Serial Commands 87
Example. The following commands place the data
shown in Table 9-13 into the Þrst database in the
onboard memory:
DB.DATA.1#0=this|<CR>
DB.DATA.1#0=is|<CR>
DB.DATA.1#0=a|<CR>
DB.DATA.1#0=test<CR>
DB.DATA.1#0=aaa|<CR>
DB.DATA.1#0=bbb|<CR>
DB.DATA.1#0=ccc|<CR>
DB.DATA.1#0=ddd<CR>
Sending the DB.DATA command alone, without
assigned data, returns the database contents:
DB.DATA.n#x<CR>
The 920i responds with the entire contents of the
database. Returned data is cell-delimited with the pipe
character (ASCII 124) and row-delimited with
carriage returns (ASCII 13).
For example, the following command could be used to
return the contents of database 1 in the onboard
memory:
DB.DATA.1#0<CR>
If the database contents are the records shown in
Table 9-13, the indicator responds with the following
data, using pipe characters and carriage returns to
delimit the database cells and rows, respectively:
t h i s | i s | a | t e s t < C R > a a a | b b b | c c c | d d d < C R >
NOTE: There is no end of database notification at the
end of the DB.DATA command transmission. Use a
receive time-out to determine command completion. This
time-out should vary based on baud rate.
You should determine the number of records currently
in the database both prior to and after sending the
DB.DATA command to verify that the correct number of
records are received. The number of records can be
determined with the
DB.SCHEMA command.
DB.SCHEMA
The DB.SCHEMA command is used to get or set the
structure of a database.
DB.SCHEMA.n#x<CR>
The 920i responds to the command above by returning
the following:
<Max Records>,<Current Record Count>,
<Column Name>,<Data Type>,<Data Size>,...<CR>
The <Column Name> , <Data Type> , and <Data Size>
elements repeat for each column in the database.
The
<Column Name> follows the rules for alias
names: 8 character maximum; must begin with an
alpha character or an underscore; can only contain
AÐZ, aРz, 0Р9, or an underscore (_).
The
<Data Type> is represented by a numeric Þeld:
The <Data Size> value must match the data type. A
range of data size values is allowed only for the
string data types:
The DB.SCHEMA command can also be used to modify
the schema, but only when the indicator is in setup
mode and only if the database does not contain any
data.
Record
Cell
1 2 3 4
first this is a test
second aaa bbb ccc ddd
Table 9-13. Sample Database Contents
Value Type
1 Byte
2 Short (16-bit integer)
3 Long (32-bit integer)
4 Single (32-bit floating point)
5 Double (64-bit floating point)
6 Fixed string
7 Variable string
8 Date and time
Table 9-14. Data Type Field Codes
Size Value
Byte 1
Short 2
Long 4
Single 4
Double 8
Fixed string 1–255
Variable string 1–255
Date and time 8
Table 9-15. Data Size Field Codes