Chapter 5 Programming Overview App; Messages - YOKOGAWA WT310EH User Manual

Chapter 5 Programming Overview
5.1

Messages

Messages
Messages are used to exchange information between
the controller and this instrument. Messages that are
sent from the controller to this instrument are called
program messages, and messages that are sent
from this instrument back to the controller are called
response messages.
If a program message contains a command that
requests a response (a query), this instrument returns
a response message upon receiving the program
message. This instrument returns a single response
message in response to a single program message.
Program Messages
The program message format is shown below.
;
<Program message unit>
<Program Message Unit>
A program message consists of one or more program
message units. Each unit corresponds to one
command. This instrument executes the commands in
the order that they are received.
Separate each program message unit with a
semicolon.
For details on the program message syntax, see the
next section.
:INPut:MODE RMS;CFACtor 3<PMT>
Example
Unit
<PMT>
This is a program message terminator. The following
three types are available.
NL (new line): Same as LF (line feed). ASCII
code "0AH."
^END : The END message as defined by
IEEE 488.1
(The data byte that is sent with
the END message is the last data
byte of the program message.)
NL^END : NL with an END message
attached.
(NL is not included in the program
message.)
Program Message Unit Syntax
The program message unit syntax is shown below.
IM WT310E-17EN
<Program Header>
The program header indicates the command type. For
details, see page 5-3.
(Program Data>
Attach program data if there are conditions that are
required to execute a command. Separate the program
data from the header with a space (ASCII code 20H). If
there are multiple sets of program data, separate each
set with a comma.
For details, see page 5-6.
Example
<PMT>
Response Messages
The response message syntax is as follows:
<Response Message Unit>
A response message consists of one or more response
message units. Each unit corresponds to one
response.
Separate each response message unit with a
semicolon.
Unit
For details on the response message syntax, see the
next page.
Example
:INPUT:FILTER:LINE 0;FREQUENCY 0<RMT>
<RMT>
RMT is a response message terminator. It is NL^END .
<Program header> Space
:INPut:CFACtor 3<PMT>
Header Data
;
<Response message unit> <RMT>
Unit
1
, 2
<Program data>
3
4
5
6
7
8
9
App
Index
Unit
5-1