American Magnetics 430, Инструкции по установке, эксплуатации и обслуживанию

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EV
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A
MERICAN
M
AGNETICS
, I
NC
. R
EMOTE
I
NTERFACE
R
EFERENCE
: P
ROGRAMMING
O
VERVIEW
W_KEYSTRING_LEFT
W_KEYSTRING_ENTER
W_FINE_ADJ_DELTA
< value >
P
ROGRAMMING
O
VERVIEW
The Model 430 Programmer conforms to the SCPI (
Standard
Commands for Programmable Instruments
) IEEE standard. The SCPI
standard is an ASCII-based specification designed to provide a
consistent command structure for instruments from various
manufacturers.
The Model 430 Programmer also implements a status system for
monitoring the state of the Model 430 through the
Standard Event
and
Status Byte
registers.
SCPI L
ANGUAGE
I
NTRODUCTION
SCPI commands conform to a tree structure where commands are
grouped according to common keywords. For example, commands
which set a Model 430 Programmer setup or operating parameter begin
with the keyword
CONFigure
. The keywords are shown in upper case
and lower case to indicate acceptable abbreviations. For the example
keyword
CONFigure
, the user may send either the abbreviated form of
CONF
, or the entire keyword
CONFIGURE
. Any other form of the keyword
is illegal and will generate an error.
Many commands also require multiple keywords to traverse the tree
structure of the entire Model 430 Programmer command set. For
example, commands associated with a current setting require the prefix
of
CONFigure:CURRent
. Note that a colon (
:
) separates the
keywords. No spaces are allowed before or after the colon. Parameters
must be separated from the command keyword(s) by at least one space.
SCPI S
TATUS
S
YSTEM
The Model 430 Programmer status system reports various conditions of
the instrument in two registers groups shown in the figure below. The
register groups consist of a condition or event register, and an enable
register which controls the actions of specific bits within the condition or
event registers
A
condition
register continuously monitors the state of the instrument.
The bits of a condition register are updated in real time. A condition
register is read-only and is not cleared when you read the register. A
query of a condition register returns a decimal value in the appropriate
output buffer which corresponds to the binary-weighted sum of all bits
set in the register.