Hioki 3504-40 C HiTester, Инструкция по эксплуатации

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8.6 Things to Know before Beginning Communication
142
Command Syntax ______________________________________________
Command names are selected for functions to be executed in a language that is
as easy as possible to understand, and command names can also be shortened.
The unshortened form of a command name is known as the "long form" and the
shortened form of a command name is know as the "short form." In this manual,
uppercase characters are used for the short form part and lowercase characters
are used for the remaining part. However, either uppercase or lowercase charac-
ters are acceptable.
For response messages returned from the unit, uppercase characters and the
long form are used.
Header _______________________________________________________
The header indicates what is to be controlled. Program messages must have a
header.
(1) Command Program Headers
There are three types of headers: simple command, compound command, and
common command.
• Simple Command Header
Simple command headers contain a single word beginning with an alphabetic
character.
:HEADer
• Compound Command Header
Compound command headers contain multiple simple command headers
separated by colons (
:
).
:BEEPer:KEY
• Common Command Header
Common command headers begin with an asterisk (
*
) to indicate the
commands are common commands.
• (As specified in IEEE488.2)
*
RST
(2) Query Program Header
This is used for finding out the results of operations performed in response to
device commands, the results of measurements, or the current configuration
state of the device. A program header is identified as a query if a question mark
(
?
) is added at the end as shown in the example below.
:FREQuency?
FREQuency
OK (long form)
FREQ
OK ((short form)
FREQu
Error
FRE
Error