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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