Operating instructions

Introduction To Programming
22
Figure 3-4. Returning the Parser to the Root
Implied Keywords
Keywords shown within brackets, such as CURR[:LEVel], are implied keywords. If they are omitted, the parser will
execute them automatically.
How to Use Implied Keywords. Because [LEVel] is an implied keyword, the parser regards the following two commands
as the same:
CURR:LEV 30
CURR 30
Under most circumstances, implied keywords are optional and you may omit them as in the above example. Sometimes you
may choose to use them in order to make the semicolon move the parser in the desired way. Returning to our previous
keyword diagram under Figure 3-2, note that you can set the immediate resistance value with:
RES .5
The parser automatically assumes that you want to program LEVel. If you wanted to program both LEV and TLEVel in
one program line and sent:
RES .5:TLEV 1 Incorrect parser positioning
the parser would end up back at the root and you would get an error because there is no TLEVel command at the root. The
correct statement would be:
RES:LEV .5;TLEV 1 Correct parser positioning
or
RES .5;RES:TLEV 1