Measurement-computing DAQFlex Bedienungsanleitung PDF herunterladen (Seite 41)

DAQFlex Message-based Firmware Specification Hardware Reference – USB-7202

Hardware features

 8 analog input channels, numbered 0 to 7.

Gain ranges:

o ±10V

o ±5V

o ±2V

o ±1V

 1 digital port

All bits are individually configurable as input or output.

 External trigger input

 External pacer input/output

This feature allows multiple devices on a single USB to acquire synchronized samples. One master

device is used to drive the signal. Additional devices must be configured as slave devices using the

"AISCAN:EXTPACER=value" message. Value may be "ENABLE[/MASTER]", "ENABLE[/SLAVE]" or

"DISABLE".

 1024 bytes of nonvolatile EEPROM memory; used for storing configuration information, calibration

data, and user data.

 RATE takes a float value.

If the input scan rate requested is less than the slowest rate supported by the device, the device is

set to the slowest rate supported by the device. If the input scan rate requested is greater than the

fastest rate supported by the device, an error is generated.

 Bulk transfers

o Bulk transfers from endpoint 1 IN are used for analog input scans. Data is in RAW format and

"DEV:DATATYPE" has no impact on the data.

o The bulk transfer size must be a multiple of the USB maximum bulk packet size.

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Measurement-computing DAQFlex Bedienungsanleitung Seite 41