KEPCO EL Series Electronic Load Operator Manual P/N 243-1295 Firmware Version 1.232 (Unit Rev 0 or 1) - Manual (Page 46)

3-12
SERIES EL 063010
3.10.4.1 KEYWORD
Keywords are instructions recognized by a decoder within the EL Series, referred to as a
“parser.” Each keyword describes a command function; all keywords used by the EL Series are
listed in Figure 3-4.
Each keyword has a long form and a short form. For the long form the word is spelled out com-
pletely (e.g. STATUS, OUTPUT and VOLTAGE are long form keywords). For the short form only
the first three or four letters of the long form are used (e.g., STAT, OUTP and VOLT). The rules
governing short form keywords are presented in Table 3-3.
You must use the rules above when using keywords. Using an arbitrary short form such as
ENABL for ENAB (ENABLE) or PROTEC for PROT (PROTECTION) will result in an error.
Regardless of which form chosen, you must include all the letters required by that form.
To identify the short form and long form in this manual, keywords are written in upper case let-
ters to represent the short form, followed by lower case letters indicating the long form (e.g.,
PROTection, CURRent, and OUTPut). The parser, however, is not sensitive to case (e.g., outp,
OutP, OUTPUt, ouTPut, or OUTp are all valid).
3.10.4.2 KEYWORDS FOR DUAL UNITS
Keywords sent to dual units must identify which load is to be controlled. This is done by adding
a 1 (for unit A) or 2 (for unit B) to the root keyword. This means that the root keyword is
required for dual units. For example, SOUR1:MEAS:VOLT;SOUR2:MEAS:CURR reports volt-
age from unit A and current from unit B. If the root keyword is not included, or the unit number is
not specified, unit A is automatically selected.
3.10.4.3 KEYWORD SEPARATOR
If a command has two or more keywords, adjacent keywords must be separated by a colon (:)
which acts as the keyword separator (e.g., SOUR:MEAS:VOLT). The colon can also act as a
root specifier (paragraph ).
3.10.4.4 QUERY INDICATOR
The question mark (?) following a keyword is a query indicator. This changes the command into
a query. If there is more than one keyword in the command, the query indicator follows the last
keyword. (e.g., VOLT? and MEAS:CURR?).
3.10.4.5 DATA
Some commands require data to accompany the keyword either in the form of a numeric value
or character string. Data always follows the last keyword of a command or query (e.g.,
SOUR:VOLT:LEV 100 or LOCK OFF.
TABLE 3-3. RULES GOVERNING SHORTFORM KEYWORDS
IF NUMBER OF LETTERS IN
LONGFORM KEYWORD IS:
AND FOURTH LETTER
IS A VOWEL?
THEN SHORT FORM
CONSISTS OF:
EXAMPLES
4 OR FEWER (DOES NOT MATTER) ALL LONG FORM LETTERS MODE
5 OR MORE
NO
THE FIRST FOUR
LONG FORM LETTERS
MEASure, OUTPut, EVENt
YES
THE FIRST THREE
LONG FORM LETTERS
LEVel, IMMediate, ERRor