GW Instek LCR-800 Series - Manual (Page 44)

PROGRAMMING
87
P
ROGRAMMING
Command overview lists all the LCR-800
commands and command queries. The command
syntax section shows you the basic rules you have
to apply when using commands.
Command Syntax
Command
Background There are a number of different instrument
commands and queries. A command sends
instructions or data to the LCR meter and a query
receives data or status information from the LCR
meter. Measurements are automatically sent when
a measurement is made in manual or automatic
mode.
Command Types
Command Two or more commands
separated by a colon (:)
with/without a parameter
Example MEMO:STOR 100.<^END^M>
Query A query is a compound
command followed by a question
mark (?). A parameter (data) is
returned.
Example SORT:NOMV?<^END^M>
Measurement Returns measurement data. Can
be manually or automatically
updated.
Example MAIN:PRIM 32.705<^END>
LCR-800 User Manual
88
Command forms Commands and queries can be written in either
ASCII or hexadecimal.
Below are examples of ASCII and hexadecimal
commands
ASCII SORT : NOMV +32.0000 < ^END^M> or <^J^M>
Hex 53 4F 52 54 3A 4E 4F 4D 56 20 2B 33 32 2E 30 30 30 30
0A 0D
Command format 1: command header
2: single space
3: parameter
4: message terminator
Parameter Type Description Example
Character string SLOW
Integers 0, 1, 2, 3
number data 0.1, 3.14, 8.5
Message
terminators
Or
New line or ASCII line feed
character (HEX 0A)
Carry return character (Hex 0D)
Input | Output
value differences The format of the input and output values differ
somewhat when dealing with positive values. The
total amount of characters used for each variable
depends on the command/query.
Number ASCII HEX
Input 1.0000 +1.0000 2B 31 2E 30
30 30 30
Output 1.0000
sp
1.0000 20 31 2E 30
30 30 30
Input -1.0000 -1.0000 2D 31 2E 30
30 30 30