Associated Research 7700, Руководство по эксплуатации и обслуживанию

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8.11. Example of communicating over the IEEE bus
To write commands over the IEEE bus you must enter the code that is specific to the
software language you are using. Then follow the example below:
To set the output voltage across the IEEE bus at 1240 volts do the following. First select
the ACW mode by sending the string
“FC”
then send the string
“SA 1240”
: This tells
the instrument to set the AC voltage at 1240 volts. A string is a list of ASCII characters,
octal or hex bytes or special symbols, enclosed in double quotes.
If the Test Function has already been selected to ACW mode and you wish to set the
ramp time of the ACW test across the IEEE bus at 10 seconds, send the string
“SD
10.00”
to the instrument. This tells the instrument to set the AC Ramp Time at 10.00
seconds.
To set outputs 1 & 2 of the scanner to High, outputs 3 & 4 to Low and outputs 4-8 to Off
type in the following string,
“SGHHLLOOOO”
, after the ACW Test Function has been
selected. All ports not being specifically set will automatically be set to “O” open.
To read the 2 x 20 display, first send the string
“?K”
then send the GPIB command to
read 40 bytes. The instrument will send 40 bytes, one byte for each character on the
display, including spaces.
8.12. Non Volatile Memory
The instrument saves each parameter in non-volatile memory when the parameter is
changed. The non-volatile memory has a limited write cycle life, therefore there is a
special volatile memory location that is available for programmers who wish to send all
parameters before executing each test. Memory 50, step 8 is the memory location that
will
NOT write the parameter to non-volatile memory. Settings written to this location
from GPIB mode will be lost when power is shut down. Parameter changes to this
location is unlimited and will not effect the life of the internal non-volatile memory chip.
FOR MORE INFORMATION ON IEEE (GPIB) PLEASE CONTACT:
The Institute of Electrical and Electronic Engineers, Inc.
345 East 47th Street,
New York, NY 10017

1-212-705-7018 (Communications Society of IEEE)
Internet: www.ieee.org