User manual

16 Getting Started Chapter 1
Setting the Logical
Address Switch
Plug-in modules installed in an mainframe or used with a command module
are treated as independent instruments each having a unique secondary
GPIB address. Each instrument is also assigned a dedicated error queue,
input and output buffers, status registers and, if applicable, dedicated
mainframe/command module memory space for readings or data. An
instrument may be composed of a single plug-in module (such as a counter)
or multiple plug-in modules (for a switchbox or scanning multimeter
instrument).
The instrument logical address (LADDR) is set with the logical address
switch located on the instrument. The logical address switch (LADDR)
factory setting for the E1460A is 112. Valid address values are from 1

to 255. See Figure 1-2 to set the logical address. From Figure 1-2, note that
the value of the logical address set is the sum of the values of the switches
set to the CLOSED position.
NOTE The address switch selected value must be a multiple of 8 if the module is
the first module in a switchbox used with a VXIbus command module and
being instructed by SCPI commands.
Figure 1-2. Setting the Logical Address Switch
OPEN = Switch Set To 0 (OFF)
CLOSED = Switch Set To 1 (ON)
Logical Address = 112
16+32+64=112
1=CLOSED
0=OPEN
4
1
2
1
6
8
3
2
Logical Address
Switch Location
1
2
8
6
4