Intermec Janus 2050, User Manual

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JANUS 2050 Vehicle-Mount Computer User’s Manual (4MB) 39
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Using IRL on the JANUS 2050
The IRL operating environment on the JANUS 2050 is called the IRL Desktop.
The IRL Desktop is a menu-driven application that lets you download IRL
programs, transmit files, receive files, and execute IRL programs.
Working With Files
Because IRL version 4.0 uses the DOS file structure, you can store more than
one IRL program on the JANUS 2050. You should exercise care in naming and
using data files, since you can use the same data file for multiple programs. If
more than one program uses the same data file, your data may be overwritten
when the next program is run.
Disk space, not internal memory, limits the size of the data files. If insufficient
disk space exists when the program begins to fill the data files, an error
message is given and the program terminates execution.
Files may be dimensioned or undimensioned. An undimensioned file has the
same characteristics as the default data file (file 0) in that only actual data is
stored. Opening an existing dimensioned data file with different dimensions
generates an error message. If a data file is opened but no data is entered when
the program ends, the data file is deleted.
All IRL program filenames must end with the extension .IRL, and all IRL data
filenames must end with the extension .IRD. Otherwise, the IRL Desktop does
not recognize them. The default filenames are as follows:
{IRL-0}.IRD IRL default data file (file 0)
{IRL-1}.IRL IRL default program file (file 1)
{IRL-A}.IRD IRL data file A
•
•
•
{IRL-Z}.IRD
IRL data file Z
These files continue to be accessed as 0, 1, and A through Z in the IRL
commands as they have in previous versions of IRL. You can read from and
write to File 0. The default program {IRL-1}.IRL is executed when you scan the
Run Program bar code label or download the command from the host
computer. When you use the IRL Desktop, you can select which program to
execute.