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SCPI Commands for the Digital Multimeter
3–256
VX4101A MultiPaq Instrument User Manual
Parameter Value
<channel number> 1
<channel mode> All closed FDC channels are opened
Parameter Value
<channel number> 1 to total number of instrument FDC channels
<channel mode> WO
VXI[:SERVant]:FDC:CLOSe [<channel number>]
This command closes the selected logical FDC channel. If the optional channel
number is omitted, the channel referenced by the VXI:FDC:SEL command is
used. Closed FDC channels must be opened before they can be accessed for data
transfer. The channel number parameter is the logical FDC channel number for
the instrument. It is not necessarily related to the physical FDC channel.
VXI[:SERVant]:FDC:OPEN <channel mode>[,<channel number>]
This command opens the selected logical FDC channel. The mode parameter
determines the direction of data flow, read only, write only or both read & write.
The mode parameter can be one of the following unquoted SCPI labels: RO,
WO, RW. Interpretation of Read and Write is from the servant device’s point of
view. Data is READ off the VXIbus back plane into the instrument and WRIT-
TEN from the instrument to the VXIbus back plane. The DMM only supports the
WO mode. If the optional channel number is omitted, the channel referenced by
the VXI:FDC:SEL command is used. FDC channels must be opened before they
can be accessed for data transfer.
VXI[:SERVant]:FDC:SEL<channel number>
The command selects the FDC logical channel to be used by subsequent FDC
commands. The channel number parameter is the logical FDC channel number
for the instrument. It is not necessarily related to the physical FDC channel. The
power up default is logical channel 1.
VXI[:SERVant]:FDC?
This query returns comma separated list of physical FDC channel numbers
allocated to the instrument. Physical and logical channel numbers have a 1 to 1
correspondence. Channel assignment occurs as follows:
Logical channel 1 is established on the first physical channel number
returned by the query.
*RST Value
Limits
Command Description
Query Response