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114 L4400 User’s Guide
5 L4433A Dual/Quad 4x8 Reed Matrix
L4433A Example Program Segments
The following sections contain example program segments of commonly used
instrument functions. .
The channel addressing scheme used in these examples follow the general
form 1ccc where ccc is the three-digit channel number. The channel numbers
for the L4433A are derived as follows:
Two-wire m ode: For two-wire mode, the channel numbers are derived from
the crosspoint or intersection of rows and columns, columns having two
digits. See the example below.
One-wire mode: For one- wire mode, the channel numbers are derived from
a specific matrix number and the crosspoint or intersection of rows and
columns on that matrix. See the example below.
For information on specific configurations, refer to the simplified schematics
for the L4433A later in this chapter.
For detailed example programs involving multiple drivers and development
environments, refer to the L4400 Product Reference CD- ROM (p/n
34989- 13601).Setting 1- wire and 2- wire Modes
Example: Configuring the L4433A for 2-wire or 1-wire mode The following
command configures the L4433A for 1- wire measurements. If you are using
terminal blocks with the L4433A module, be sure to use the corresponding
2- wire or 1- wire terminal block.
SYSTem:MODule:WIRE:MODE WIRE1,1
Displayed Channel Means This...
1304 An L4433A (2-wire mode) where the crosspoint is
row 3, column 4.
Displayed Channel Means This...
1437 An L4433A in 1-wire mode with matrix 4 and the
crosspoint is row 3, column 7.
NOTE
After changing the (1-wire / 2-wire) mode on the L4433A, you must
cycle power on the L4433A for the new mode setting to take effect.