User manual

Section 13: Instrument Control Library (ICL) Series 3700 System Switch/Multimeter Reference Manual
13-46 3700S-901-01 Rev. C / July 2008
channel.getbackplane()
Remarks,
continued
An error is generated if:
An empty parameter string is specified.
An empty slot is specified.
A specified channel does not exist for the card installed in a slot.
A channel pattern is specified in parameter list.
A syntax error exists in the parameter list.
A specified channel does not have analog backplane relays associated with it like
digital I/O.
An analog backplane relay is specified in parameter list.
When ch_list contains multiple items, the string returned has the analog backplane
relay channels of a single channel separated by a comma. A semicolon is used to
delineate channels.
For channel patterns, the analog backplane relays must be specified when creating
the pattern in the channel list parameter (see channel.pattern.setimage()
(on page 13-63) or channel.pattern.snapshot() (on page 13-66)).
Therefore, to see the channels and analog backplane relays associated with a channel
pattern, use the channel.pattern.getimage() (on page 13-62) function.
Command processing stops as soon as an error is detected and a nil response is
then returned. No partial list is returned.
For digital I/O, DAC, and totalizer channels, nothing is returned.
Also see
channel.close() (on page 13-37)
channel.exclusiveclose() (on page 13-41)
channel.open() (on page 13-59)
channel.setbackplane() (on page 13-70)
channel.setpole() (on page 13-79)
Query commands (on page 13-6)
Example
To query analog backplane relay(s) specified on Channel 2 of Slot 2 for switching
aspects:
abuslist = channel.getbackplane("2002")
MUX
channel.getclose()
Function
Queries for the closed channels indicated by the scope of the channel list parameter.
Usage
closed = channel.getclose(<ch_list>)
ch_list: A string representing the scope of closed items being queried. Items can
include channels, backplane relays, and channel patterns.
closed: A string listing the channels that are currently closed.