IEEE-488 Reference
3-82
The :OPEN? <list> query command is used to determine the state (opened or not opened) of
each channel specified by the list parameter. For this command, the chanlist can consist of mul-
tiple channels. See the :CLOSe command for examples to express a chanlist.
After sending this query command and addressing the Model 6517A to talk, the values for the
specified channels are sent to the computer. A value of "1" indicates that the channel is open,
and a "0" indicates that the channel is not open.
3.18.3 :OPEN:ALL :ROUTe:OPEN:ALL Open closed channel
This action command is used to open a closed channel on the internal scanner card. Note that
this command performs the same function as the :ROUTe:OPEN ALL command that was pre-
viously discussed.
3.18.4 :SCAN commands
[:INTernal] <list>
:ROUTe:SCAN[:INTernal] <list> Define internal scan list and enable scan.
Parameters <list> = (@ scanlist)
where; scanlist is the specified list of channels (1 to 10) to be scanned.
Query [:INTernal]? Query programmed scan list
Description This command is used to define the scan list for the internal scanner card. The scan list can con-
tain 2 to 10 channels. The following examples demonstrate the various forms for expressing a
scan list:
list = (@ 2,4,6) Channels separated by commas (,).
(@ 1:8) Range of channels (1 though 8). Range limits separated by a colon (:).
(@ 1:5,7) Range entry and single entry separated by a comma.
Refer to Section 2 of this manual and the instruction manual for the scanner card for details on
scanning.
:EXTernal <n>
:ROUTe:SCAN:EXTernal <n> Specify number of external channels
Parameters <n> = 1 to 400 Specify number of external channels
DEFault 10 external channels
MINimum 1 external channel
MAXimum 400 external channels
Query :EXTernal? Query programmed number of external channels
:EXTernal? DEFault Query *RST default channel number value
:EXTernal? MINimum Query minimum channel number value
:EXTernal? MAXimum Query maximum channel number value
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