Getting Started
17
Relay Driver Module Programming
The Relay Driver Module can be programmed using register access (see
Appendix B - Relay Driver Module Register Definitions
) or via the
Command Module using Standard Commands for Programmable
Instruments (SCPI).
Note
Since the Relay Driver Module can be used in a B-Size or C-Size
mainframe, the term Command Module as used in this manual refers to the
Agilent E1306 or Agilent E1406 Command Module or to the B-Size
mainframe.
If you use SCPI to program the Relay Driver Module, it is highly
recommended that you do not use register programming since the SCPI
driver maintains an image of the card state. If the card state is altered by
using register writes, the driver will be unaware of these changes.
Switchbox
Definition
For a SCPI environment, multiple Relay Driver Modules can be configured
as a
switchbox
instrument. The term switchbox refers to a SCPI instrument
consisting of one or more switchcards (Relay Driver Modules). The
instrument itself is the firmware running in the Command Module.
For a switchbox instrument, all channels within the instrument can be
addressed using a single interface address. Single, multiple, or continuous
scanning of specified switch channels is available for any switchbox
configuration. Logical addresses should start on a boundary of 8 for the
command module. Also, logical addresses are sequential.
Example: Typical Switchbox Instrument
For example, Figure 1-2 shows a typical switchbox with three Relay Driver
Modules. The three modules have sequential logical addresses of 120, 121,
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