Figure 3-5. message structure, 1 keyword, Table 3-4. rules governing shortform keywords – KEPCO TMA VXI-27 User Manual

Page 28: Keyword -11, Message structure -11, Rules governing shortform keywords -11

TMA VXI -27 101602

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FIGURE 3-5. MESSAGE STRUCTURE

3.5.4.1

KEYWORD

Keywords are instructions recognized by a decoder within the TMA VXI-27, referred to as a
“parser.” Each keyword describes a command function; all keywords used by the TMA VXI-27
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, VOLTAGE, and TRIGGER are long form keywords). For the
short form only the first three or four letters of the long form are used (e.g., STAT, VOLT, OUTP,
and TRIG). The rules governing short form keywords are presented in Table 3-4.

TABLE 3-4. 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

THE FIRST FOUR

LONG FORM LETTERS

MEASure, OUTPut, EVENt

5 OR MORE

YES

THE FIRST THREE

LONG FORM LETTERS

LEVel, IMMediate, ERRor

CURR:LEV 3.5;:OUTP ON;:CURR?

MESSAGE TERMINATOR

KEYWORD

QUERY INDICATOR

ROOT SPECIFIER

MESSAGE UNIT SEPARATOR

DATA

KEYWORD

KEYWORD SEPARATOR

KEYWORD

MESSAGE UNIT SEPARATOR

DATA

MESSAGE UNIT

DATA SEPARATOR

ROOT SPECIFIER