Measurement-computing DAQFlex User Guide Manuale Utente Scaricare il pdf (Pagina 93)

DAQFlex Software User's Guide FlexTest Utility

FlexTest user interface

The FlexTest window features the following controls:

 Devices drop-down list: displays the name and serial number of each connected DAQFlex-supported

device.

 Show message log check box: When checked, the text of each message sent to the device appears

in the MessageLog window.

 Component tabs: the DAQ components that are supported by the DAQFlex-supported device.

 Message field and drop down list: displays the text messages that can be sent to the device. The

messages are specific to the component selected. An asterisk in the message indicates a variable

whose property value must be entered.

Refer to the DAQFlex Message Reference chapter for more information about the API messages.

 Send Message button: click this button to send the selected message to the device.

 Response field: Displays the response to the message that is returned from the device.

o Text messages display in a Text field.

o When a number is returned from the device, for example when reading the value of an analog

input channel, the value displays in a Numeric field.

o When multiple values are returned, such as when scanning data, the values display below the

message that is returned.

 Show message log check box: When checked, the text of each message sent to the device appears

in the MessageLog window.

 Status area: The bottom of the window displays either a status message or scan count:

o Message status: When a message is successfully sent to a device, "Success" appears in the

status area. If a message cannot be sent, such as when a variable is either not set or is set to

an unsupported value, an error message appears in the status area.

o Scan count: during a scan operation, the status area updates with the number of samples that

are read.

Messagelog window

The MessageLog window lists each message that is sent to the device. Note that the Show message log

checkbox on the FlexTest window must be checked in order to display messages on the Messagelog

window.

Click the Clear button to remove the messages.

Using FlexTest

The procedures below demonstrate how to read/display scan data, and how to calibrate a device with

FlexTest.

Read and display scan data

The following exercise demonstrates how to read and display multiple channel scan data using FlexTest.

For this exercise, you set the range of analog channels to scan (1 to 3), set the channel range to ±10

volts, the sample rate to 1000 Hz, and the number of samples to 256. After configuring the scan

parameters, you run the operation and view the resulting scan data.

Do the following:

1. Connect a device that supports the DAQFlex protocol to your system and run FlexTest.

2. Click on the AISCAN tab.

3. Configure the scan parameters using the text strings in the Message drop down list:

o Select AISCAN:LOWCHAN=*. Highlight the asterisk and enter "0", then click Send Message.

o Select AISCAN:HIGHCHAN=*. Highlight the asterisk and enter "1", then click Send Message.

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Measurement-computing DAQFlex User Guide Manuale Utente Pagina 93

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