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Using the SCXI-1600 USB DAQ Device with SignalExpress 1.0, 1.1.x, or 2.0

Primary Software: LabVIEW Signal Express>>Development System
Primary Software Version: 1.1
Primary Software Fixed Version: N/A
Secondary Software: N/A
Hardware: SCXI>>Modules>>SCXI-1600

Problem:
I have an SCXI chassis with a SCXI-1600 USB DAQ Device. My SCXI-1600 does not show up in the Device list of my NI-DAQmx Acquire Step. How can I acquire data using the SCXI-1600 along with other SCXI modules in SignalExpress 1.0, 1.1.x., or 2.0.

Solution:
SignalExpress 1.0
The SCXI-1600 can be selected as a DAQ device of an NI-DAQmx Acquire step in SignalExpress 1.0.

SignalExpress 1.1 and 1.1.1
The SCXI-1600 is not properly identified as a DAQ device in SignalExpress 1.1 and 1.1.1. To work around this, you may use the user_DAQmxAcquire user VI that can be downloaded at the Drivers and Updates page linked below. This user VI works as part of a User-Defined step. To configure a User-Defined step with this or another user VI, please refer to the Devzone tutorial linked below.

Once the User-Defined step is created and configured to use the user_DAQmxAcquire user VI, you should select the DAQmx physical or global channels, configure the acquisition parameters, and then close the Step Setup window. This user VI works with any version of NI-DAQmx and is not specific to the SCXI-1600 device. Furthermore, this user VI exposes the same functionalities as the native SignalExpress NI-DAQmx Acquire step with the exception of the following:

• Multiple device synchronization (trigger and clock sharing)
  
• Locking to PXI_clock10 for M series devices
  
• Execution control (wait on other step)
  
• Single point acquisition mode

This user VI has the following additional limitation: since the number of outputs of a user VI is limited to the number of terminals available on its connector pane, the user_DAQmxAcquire user VI is limited to 20 channels.

SignalExpress 2.0
When using a SCXI-1600 inside a SCXI chassis, modules installed in the same chassis will be selectable within SignalExpress 2.0.  For example, if using the SCXI-1600 with two SCXI-1102 thermocouple modules, all of the analog inputs from both of the SCXI-1102 modules will be accessible.

Related Links:
Drivers and Updates: SignalExpress Version 1.1.1 for Windows 2000/NT/XP -- Updates
Developer Zone Tutorial: Creating SignalExpress Plug-Ins with LabVIEW
KnowledgeBase 3DCF26SF: Can SignalExpress Acquire Data from SCXI or SCC Modules?
KnowledgeBase 3EKF8MFL: What Hardware is Supported in SignalExpress?

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Report Date: 10/05/2005
Last Updated: 04/28/2008
Document ID: 3Q4FKDZH

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