Measurement-computing CIO-DAS16/330 Manual do Utilizador descarregar pdf (Página 18)

Table 4- 3. Input Range Coding

70 to 1.25V1110

60 to 2.5V0110

50 to 5V1010

40 to 10V0010

3+/-0.6251100

2+/-1.25V0100

1+/-2.5V1000

0+/-5V0000

8+/-10V0001

DecimalInput RangeG0G1Uni/BipRange

To set the analog input range of the CIO-DAS16/330 programmatically, write the correct input range code to the base

address + 11. For example, from BASIC:

If the board's base address is 300h (768 decimal), then the gain register is at 768 + 11 = 779

100 OUT 779, 5 'Set analog output range to 0 to 5V

The decimal range codes are in the far right column above.

BASE ADDRESS +11 - Enhanced Mode

A write to this register sets the analog input range for all 8/16 analog inputs as well as enabling and disabling extended

features and controlling extended features for pre-triggering and DT-CONNECT. The lower four bits set the analog input

range. The upper four bits control and provide status of enhanced features.

G0G1Uni/BipRangeSet/Read

Mode

Overrun

Status

Pre-

Trigger

Enable

DT-

Connect

Enable

01234567

GAINS: Gain control is identical in both compatible and enhanced mode.

BIT 4 - Set Compatible/Enhanced Mode. Read Mode Status

WRITE: 0 = disable enhanced mode. 1 = enable enhanced mode (mode switch must be down).

READ: 0 = Switch 7 of base address switch, the mode switch, is up. It is not possible to enable enhanced features

when the mode switch is up. When Bit 4 = 1, the mode switch is down and enhanced features can be enabled.

BIT 5 - Set Pretrigger, DT-Connect. Read FIFO, Overrun

READ: 0 = No overrun. 1 = FIFO buffer full (> 1024 samples) or DT-CONNECT overrun if DT-CONNECT is

enabled. This signal is the logical OR of these two possible overrun signals. To determine the source of the overrun

error: If DT-Connect is not enabled then the overrun is FIFO. If DT-CONNECT is enabled, issue a clear to the FIFO

then reread the status bit. If still active, the overrun was at the DT-CONNECT.

WRITE: Enable channel gain queue mode. Access to Base + 2 is inhibited when the channel gain queue is enabled.

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Measurement-computing CIO-DAS16/330 Manual do Utilizador Página 18