IEEE-488 Reference
5-78
5.13.2
:OPEN <list>|ALL
[:ROUTe]:OPEN <list>|ALL Open specified (or all) channels
<list> = (@ chanlist) Open listed channels
ALL Open all channels
where; chanlist is the specified list of channels (channel list) to be opened.
:open (@ chanlist)
:open all
Power-up All channels open
*RST No effect
:SYSTem:PRESet No effect
:OPEN? <list> Query state of specified channels.
Short-form formats: :open? (@ chanlist)
Response message: 1 = specified channel(s) open.
0 = specified channel(s) not open.
The :OPEN command is used to open one or more channels. The <list> parameter is used to
define a channel list (chanlist) the specifies which channels to open. The ALL parameter is used
to simply open all channels.
The following examples demonstrate various forms for expressing channel entries for a chanlist.
Chanlist
1!2!4 Single channel (Slot 1, Row 2, Column 4).
2!36 Single channel (Slot 2, Channel 36).
1!6, 1!18, 2!3!6 Multiple channels separated by commas.
1!2:1!10 Range of channels (2 through 10).
1!2:1!10, 2!3!6 Range entry and single entry separated by commas.
1!30:1!40, 2!1:2!10 Range of multiplex channels (last 10 channels on card 1,
first 10 channels on card 2).
1!4!1:1!4!10, 2!1!1:2!1!10 Range of matrix channels (10 columns of row 4 on card 1,
10 columns of row 1 on card 2).
M36 Channel pattern stored at memory location M36.
The :OPEN? <list> query command is used to determine the state (open or not open) of each
specified channel. After sending this command and addressing the Model 7001 to talk, the val-
Parameters
Short-form
formats
Defaults
Query
command
Description
[:ROUTe] subsystem
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