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Field Test Unit
Software
5. DATA STORAGE FORMAT
Data storage and communications to/from RAM, Cassette tape and RS-232
communication with a host computer conforms to the format detailed
below.
5.1
FTU
FILE FORMAT
The data file consists of three parts, one HEADER message (Line
1:)
one
or more DATA messages (Line 2: onwards) and an END message line.
1 HEADER message which contains information about the file.
1 or more DATA messages which contain the actual data.
1 END message which terminates the file.
5.1.1 HEADER Message Format
The HEADER message is generated by a
BASIC ‘PRINT’
statement and
read by a
BASIC
‘INPUT’ statement.
The HEADER information is used to describe the
file
and its contents,
Fields are separated by commas. (The message is terminated with a C/R
L/F
sequence.)
HEADER message - Line
1:-
filename,ext,cycle,time,filesize
C/R
L/F
Where:-
filename
= Name of the data file
ext
= Filename extension
cycle = Data Logger cycle time in seconds (usually 5)
time
= Time and Date in logger
(locn
4. Data Logger format)
cycles
past 1JAN80
filesize
= Size file in bytes (excluding this HEADER Line 1:
but including all DATA messages and the END line)
Section 5. DATA STORAGE
FORMA
T
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