Using Exclude Lists - Racal Instruments 1256E Manual

1256E User Manual
Using Exclude
Lists
Racal Instruments © 2002
(@1(0),2(0),4(0),(@1(3,5)),(@2(7:10)),
(@3(16,19)),(@4(1:4,14,23))
The INCLUDE? query with no parameters passed returns all
presently defined include groups. Each group is separated from
each other by a comma. Note that if there are many include lists
defined, the query may result in a reply which is longer than the
length of the output reply buffer (1024 characters). In this case, the
"Query Interrupted" error will be placed on the error queue and the
output reply buffer will be cleared. To avoid this, always specify a
channel list with this query.
The reply to the INCLUDE? query does NOT contain module
names, nor does it contain path names. In addition, when 3 or
more consecutive channels are defined in the include list, the
reply will represent the channels as a range of channels, with a
colon (:) between the first and last channels in the range.
For example, if the following commands are executed:
MODULE:DEFINE matrix,1
MODULE:DEFINE power,2
INCLUDE (@matrix(14,103,104,105,106),power
(3:7,12,16,17,18))
then the query:
INCLUDE? (@matrix(105))
returns the reply:
(@1(14,103:106),2(3:7,12,16:18))
After power-up, and after a "*RST" command has been executed,
all INCLUDE lists are deleted.
The 1256 provides the capability to define sets of relays which are
"mutually exclusive". This feature is called an "exclude list". When
one relay on an exclude list is closed, all others in the exclude list
are opened. This prevents two relays in an exclude list from being
closed simultaneously.
This feature can be used to ensure two or more relays are not
shorting system resources, such as power supplies, together.
A channel may reside on at most one exclude list. An attempt to
place a channel on a second exclude list results in an error. The
error is placed on the error queue and may be read using the
SYSTEM:ERROR? query.
A channel cannot be on an include list with another channel if it is
also on an exclude list with that second channel. That is, the
Advanced SCPI Operations 8-5