XITRON 2000I, User Manual

Page: 85 / 96

Interface Operation 85
In these examples, the numeric entry of the output level is achieved by
simulation of front panel key presses, thus the same techniques are applicable
as defined in the
Front Panel Operation section of this document.
Adjusting Output Level
This may be achieved by shortcut commands or by simulating keyboard
commands by using command characters. To select the “Adjust” mode of
operation the instrument may send the character string
D or the character
string MMV. In the later character string, note that these characters simulate
the key presses required to perform the desired task: MNU, MNU and V,
whereas the first command string uses the shortcut form.
Having selected the “Adjust” mode of operation, the user may send any
combination of (2, 4, 6 or 8) characters to simulate the down, left, right, and
up arrow
keypad commands respectively, thus selecting the required digit and
incrementing or decrementing it as desired.
Reading Present Output Level
In each example shown below, the actual output character string is followed
by the
carriage return and line feed characters.
The 2000 instruments output level and status may be read at any time, when
using the IE-BAT interface. You can
read via the RS-BAT interface after
transmitting the @ character to the 2000I or 2000M instrument and then
reading the characters as received from the instrument.
If the output level is
+10.23567V
, in the “Operate” state and not in
“Adjust” mode, then the received string will be
+10.23567V
. Note that 19
characters are always transmitted (a leading space, the 16 display characters,
the carriage return character, and the linefeed character).
There are many different combinations of output data that are possible, the
user is advised to program either the 2000I or 2000M instrument manually
and read the display data for each intended operation before programming its
software.