C-8
DriverLINX Configuration Notes
The following list explains the Event abbreviations in the preceding table:
null
— Null or None Event when a Service Request doesn’t require an
event.
cmd
— Command Event when DriverLINX starts or stops a task on
software command.
TC
— Terminal Count Event when DriverLINX processes all data buffers
once.
rate
— Rate Event specifies how DriverLINX paces or clocks data
transfer.
dig
— Digital Event specifies a trigger, clock, or other control signal to
pace, start, or stop a task.
Analog Input Subsystem
The DAS-1800HC boards contain one A/D converter and a 64-channel
multiplexer. You can configure the A/D inputs as 64 single-ended or 32
differential channels. The input channels, labeled
CH00HI
[B2] and
CH00LO/CH32 HI
[B3], etc., are located on the 100-pin
Centronics-style male connector that projects through the rear panel of
the computer.
The other DAS-1800 models contain one A/D converter and a 16-channel
multiplexer. You can configure the A/D inputs as 16 single-ended or 8
differential channels. The input channels, labeled
CH00HI
[26] and
CH00LO/H08 HI
[2], etc., are located on the 50-pin Centronics-style
male connector that projects through the rear panel of the computer.
All models provide software programmable input channel gain and a 256
location channel/gain queue (64 locations for DAS-1800HC). The
hardware channel/gain queue enables high-speed sampling up to the
maximum rate of channels out of sequence with different gain. You can
also use it to sample the same channel more than once at different gains.
Analog Input Initialization
Initialization of the analog input subsystem aborts any active DMA or
interrupt data acquisition tasks and stops the clock. Also, the driver
checks for the presence of hardware and agreement with the configuration
parameters.
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