Prefix (X) - Keithley 776 Instruction Manual

Table 4-9.
Data String Formats
~-ccqmand
RO
RI
P.2
R3
R4
R5
R6
Rl
Data String~Ponnat
~~, ~~Deuc,rM!9c ~~..-. ~~~
(FRQA)+l.231567890E+O(TERM)
for FRQ A meas~rcm~nts
(FRQB)+l.23~S6789OE+O(TERM) for FRQ B ",eas"rc"~c"ts
(FRQC)+l.234.567890E+O(TERM) for FRQ C measurements
(PERS)+l.23456789OE+('IERM) for PER A measurements
(PLSS)+l,234567890E+(TERM) for PLS A measurements
(TABS)+l.23~567890E+O(TERM)
for T.1 A to B measurements
(TOTB)+l.234567890E+O(TERM) for TOT B measurelnents
(ATOB)+l,234567890E+O(TERM) for Ratio A/B measurements
(CTOB)+l.234567890E+O(TERM)
for Ratio C/B measurements
(PHAS)+l,234567890E+O(TERM) for Phase A to B mcasuwments
(VPKA)-O.OO -0.00 (TERM) for V PeaK A measureme"ts
(PERV)+l.23456789OE+O(TERM) for PER AVG A measurements
(PLS V)+l.23-+567890E+O(TERM) for PLS AVG measurelnents
(TABV)+I,234567890E+O(TERM) for T.1 A to B AVG measurements
(GATE)lOE-O(TERM) for Gate Time
(DLAY)lOE-O(TERh4) for Delay Time
(TRGA)+O.OO(TERM) for Trig Level A
(TRGB)+O.OO(?ERM) for Trig Level B
(STAT)OOOOOOOOOOOoOOO(TERM) Input conditioning status
(776)000001000100000(TERM)
Machine status
(EROR)OOOOO(TERM) Error status
NOTES
data string is four byte shorter. The X command is also
1.
Most co"trollers "se the CR or LF character to termi-
"ate their input sequence. Using the NO TERMINATOR
mode (28 or Z9) ma); cause the controller to hang up
unless special programming is used.
2. Some controllers may require that EOI be present at
the end of transmitting.
used to replace leading space character(ASCIl2() HEX)
in the data string with character 0 (ASCII 30 HEX). For
some controllers. a" attenlpl to wad a number instead of
a string, will result a reading error because of its inabil-
ity to read spaces before the first significant digit. To
eliminate this problem the Model 776 should bc pro-
arammed to send the data string with leading zeros. X4
4-103. Prefix (X)
The prefix from the data string may be suppressed "sing
this command. When the prefix is suppressed the output
mode is an absolute necessity to reach the readiog speed
of "p to 100 readings per second (in col~junction nil11
S2 and S3). X command parameters include:
Table 4-10. ,Slntrrs IIbrci'
Inlerpr~lniion
Command
R5
After SDC
.., ..~~$tatus ~J@r$~~ormat
(STAT) F AC AA AF AS AI BC BA BF tiS Bl L 1 O(tcrm)
(STAT)00 0 0 0 0 0 0 0 0 0 0 0 0 O(CR LF)
R6
After SDC
R7
After SDC
(776) OPTI OPT2 OPT3 V M C N 0 P S Q Z D X(terml
(776) n n n o o o IO 0 o 1 0 0 0 O(CR LF)
(EROR) IL1 ILP GATEERR TLERR 0 (CRLF)
(EROR) 0 0 0 0 0 (CR LF)
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