Keithley 2700, User Manual, Page: 86 / 500

Model 2700 Multimeter/Switch System User’s Manual Close/Open Switching Module Channels 2-31
Switching module queries (remote operation)
For remote operation, there are commands to identify installed switching modules and
channels that are closed. There are also commands to acquire general information about
the installed modules.
*OPT?
For remote operation, the *OPT? command can be used to determine which switching
modules (or pseudocards) are installed in the Model 2700. For example, assume a
Model 7700 is installed in slot 1, and the other slot is empty. After sending *OPT? and
addressing the Model 2700 to talk, the following response message will be sent to the
computer:
7700, NONE
ROUTe:CLOSe?
ROUTe:MULTiple:CLOSe?
ROUTe:MULTiple:CLOSe:STATe? <clist>
These query commands are used to determine closed switching module channels.
ROUT:CLOS?
is used to return a list of closed measurement channels including the paired
channel for 4-wire measurements. It will not return non-measurement channels. For
details, see
Table 2-1 and related reference information.
ROUT:MULT:CLOS?
is used to return all closed channels (measurement and non-
measurement). For details, see Table 2-2 and related reference information.
ROUT:MULT:CLOS:STAT?
is used to return the state (open or closed) of each specified
channel. A “0” is returned for an open channel, and a “1” is returned for a closed channel.
For details, see
Table 2-2 and related reference information.
SYSTem:CARD commands
There is a series of SYSTem:CARD commands that can be used to acquire the following
information about a switching module installed in the Model 2700:
• Return the serial number and firmware revision.
• Determine the maximum allowable voltage.
• Determine if the module supports multiplexer or isolated channels.
• Determine if the module has built-in temperature sensors for internal cold junction,
thermocouple temperature measurements.
• Determine which channels are used for volts/2-wire measurements and which are
used for amps.
• Determine which channels are used for analog or digital output.
• Determine the totalizer channel (Model 7706 only).
The SYSTem:CARD commands are covered in Table 15-7 .