YOKOGAWA WT210, User Manual, Page: 219 / 316

14-3
IM 760401-01E
Communication Commands 2 (System of Commands Complying to the IEEE 488.2-1992 Standard)
14
14.2 Program Format
14.2.2 Messages
Blocks of message data are transferred between the
controller and this instrument during communications.
Messages sent from the controller to this instrument
are called program messages, and messages sent
back from this instrument to the controller are called
response messages.
If a program message contains a query command, i.e.
a command which requests a response, this
instrument returns a response message. A single
response message is always returned in reply to a
program message.
Program Messages
As explained above, the data (message) sent from the
controller to this instrument is called a program
message. The format of a program message is shown
below.
<PMT>
;
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 commands one
by one according to the order in which they are
received.
Program message units are delimited by a “
;
”.
For a description of the format of the program message
unit, refer to the explanation given further below.
Unit Unit
Example
:CONFIGURE:MODE RMS;FILTER ON<PMT>
<PMT>
PMT is a terminator used to terminate each program
message. The following three types of terminator are
available.
NL
(New Line): Same as LF (Line Feed). ASCII
code “
0AH
” is used.
^END
: END message defined in IEEE488.1.
(EOI signal)
(The data byte sent with an END
message will be the final item of the
program message unit.)
NL^END
: NL with an END message attached
(NL is not included in the program
message unit.)
14.2.1 Symbols Used in Syntax
Descriptions
Symbols which are used in the syntax descriptions in
Section 14.3 are shown below. These symbols are
referred to as BNF notation (Backus-Naur Form). For
detailed information, refer to pages 14-7 to 14-8.
Symbol Description Example Example
< > Defined value ELEMENT<x> <x>=1 to 3 ELEMENT3
{} One of the options in MODE {RMS|VMEan|DC} MODE RMS
{} is selected.
| Exclusive OR
MODE {RMS|VMEan|DC} MODE RMS
[ ] Abbreviated SCALing[:STATe] {<Boolean>}
... may be repeated