Measurement DAQFlex User Manual

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Software User's Guide

DAQFlex

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Table of Contents

Preface

About this User's Guide ....................................................................................................................... 5

What you will learn from this user's guide ............................................................................................ 5

Conventions in this user's guide ......................................................................................................... 5

Where to find more information .......................................................................................................... 5

Chapter 1

Introducing DAQFlex Software ............................................................................................................ 6

Platform support ............................................................................................................................... 6

Hardware requirements ..................................................................................................................... 7

Installing the DAQFlex software library ................................................................................................ 7

Windows 8, Windows 7, Windows Vista, and Windows XP .................................................................... 7

Windows CE .................................................................................................................................. 8

Mac OS X ...................................................................................................................................... 8

Linux ............................................................................................................................................ 8

Chapter 2

Using DAQFlex Software ...................................................................................................................... 9

Reading and writing software-paced I/O ............................................................................................ 11

Reading an analog input channel.................................................................................................... 12

Writing to an analog output channel ............................................................................................... 13

Reading a digital bit ..................................................................................................................... 14

Writing to a digital bit ................................................................................................................... 15

Reading a digital port ................................................................................................................... 16

Writing to a digital port ................................................................................................................. 17

Reading a counter input channel .................................................................................................... 18

Reading hardware-paced I/O ............................................................................................................ 19

ReadScanData() parameters ......................................................................................................... 20

Internal buffer ............................................................................................................................. 20

CallbackType ............................................................................................................................... 20

Writing hardware-paced I/O ............................................................................................................. 22

WriteScanData() parameters ......................................................................................................... 23

Internal buffer ............................................................................................................................. 23

Chapter 3

DAQFlex Software Reference ............................................................................................................ 24

DaqDeviceManager class ................................................................................................................. 24

DaqDeviceManager.GetDeviceNames() ........................................................................................... 24

DaqDeviceManager.CreateDevice() ................................................................................................ 25

DaqDeviceManager.ReleaseDevice() ............................................................................................... 26

DaqDevice class ............................................................................................................................. 26

DaqDevice.SendMessage() ............................................................................................................ 26

DaqDevice.ReadScanData() ........................................................................................................... 27

DaqDevice.WriteScanData() .......................................................................................................... 28

DaqDevice.EnableCallback() .......................................................................................................... 28

InputScanCallback Delegate .......................................................................................................... 29

DaqDevice.DisableCallback() ......................................................................................................... 29

DaqDevice.GetErrorMessage() ....................................................................................................... 29

DaqDevice.GetSupportedMessages() .............................................................................................. 30

Chapter 4

DAQFlex Message Reference ............................................................................................................ 31

DAQFlex components ...................................................................................................................... 31

Programming messages................................................................................................................... 32

AI .............................................................................................................................................. 32

DAQFlex Software User's Guide

AICAL ......................................................................................................................................... 39

AIQUEUE .................................................................................................................................... 39

AISCAN ...................................................................................................................................... 42

AITRIG ....................................................................................................................................... 50

AO ............................................................................................................................................. 52

AOCAL ........................................................................................................................................ 55

AOSCAN ..................................................................................................................................... 55

AOTRIG ...................................................................................................................................... 60

CTR ............................................................................................................................................ 60

DEV ........................................................................................................................................... 61

DIO ............................................................................................................................................ 65

TMR ........................................................................................................................................... 68

Reflection messages ........................................................................................................................ 72

AI .............................................................................................................................................. 72

AISCAN ...................................................................................................................................... 76

AITRIG ....................................................................................................................................... 80

AO ............................................................................................................................................. 81

AOSCAN ..................................................................................................................................... 83

CTR ............................................................................................................................................ 86

DIO ............................................................................................................................................ 88

TMR ........................................................................................................................................... 89

Chapter 5

FlexTest Utility ..................................................................................................................................... 92

FlexTest user interface .................................................................................................................... 93

Messagelog window ...................................................................................................................... 93

Using FlexTest ................................................................................................................................ 93

Read and display scan data ........................................................................................................... 93

Calibrate a device ........................................................................................................................ 94

DAQFlex message reference ............................................................................................................. 95

Chapter 6

C# and VB Example Programs .......................................................................................................... 96

Default installation path ................................................................................................................ 96

Building the DAQFlex example programs ......................................................................................... 96

Chapter 7

Hardware Reference ........................................................................................................................... 98

USB-200 Series .............................................................................................................................. 99

USB-1208FS-Plus ......................................................................................................................... 102

USB-1408FS-Plus ......................................................................................................................... 105

USB-1608FS-Plus ......................................................................................................................... 108

USB-1608G Series ........................................................................................................................ 111

USB-2001-TC ............................................................................................................................... 115

USB-2408 Series .......................................................................................................................... 116

USB-7202 .................................................................................................................................... 120

USB-7204 .................................................................................................................................... 122

Preface

About this User's Guide

What you will learn from this user's guide

This user's guide explains how to install, configure, and use the DAQFlex Framework communication protocol.

Conventions in this user's guide

For more information

Text presented in a box signifies additional information and helpful hints related to the subject matter you are reading.

Caution! Shaded caution statements present information to help you avoid injuring yourself and others,

damaging your hardware, or losing your data.

bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes.

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.

Where to find more information

Additional information about DAQFlex software is available on our website at www.mccdaq.com. You can also contact Measurement Computing Corporation with specific questions.

 Knowledgebase: kb.mccdaq.com  Phone: 508-946-5100 and follow the instructions for reaching Tech Support  Fax: 508-946-9500 to the attention of Tech Support  Email: techsupport@mccdaq.com

Chapter 1

Introducing DAQFlex Software

DAQFlex is a framework that combines a small footprint driver with a message-based command protocol. It is used to develop data acquisition applications that can be deployed across multiple operating systems and custom embedded systems. The DAQFlex protocol greatly simplifies driver and application development. All DAQ operations are programmed through a common command interface composed of a cross-platform application programming interface (API) and open-source driver.

The DAQFlex framework consists of a software API, DAQFlex device driver, and the DAQ device message engine. The message engine parses and converts the DAQFlex message-based command set into DAQ-specific commands that control the device and process data.

Figure 1. DAQFlex Framework

A DAQFlex program sends DAQFlex methods to the driver. The driver sends the encapsulated messages to the data acquisition device. The device interprets the message using the message engine, and sets its corresponding attributes using the DAQ engine. The data acquisition device then returns the requested data to the DAQFlex driver, which returns the data in an array (ScanData) to the program.

DAQFlex software includes the software API, device driver, FlexTest utility, and example programs.

 Platform Support and Hardware Requirements  Installing the DAQFlex Software Library  Using DAQFlex Software  DAQFlex Software Reference  DAQFlex Message Reference  FlexTest Utility  C# and VB .NET Example programs  DAQFlex Hardware Reference

Platform support

You can run the DAQFlex communication protocol on a computer running one of the following operating systems and software:

 Microsoft Windows (32-bit or 64-bit)

o Windows 8 o Windows 7 o Windows Vista o Windows XP o Microsoft .NET® Framework 2.0 or later

DAQFlex Software User's Guide Introducing DAQFlex Software

 Microsoft Windows CE

Development requirements:

o Microsoft Windows XP/Vista operating system o Microsoft Visual Studio 2008 or later o Microsoft .NET Compact Framework 3.5 o Microsoft ActiveSync

Deployment requirements:

o Windows CE 5.0 o X86 or ARM CPU o Microsoft .NET Compact Framework 3.5 o DaqFlex.dll o Mcusb.dll o Mcwinceusb.dll

 Macintosh (32-bit or 64-bit)

o MAC OS X o Leopard 10.5 or later o Mono Framework 2.0 or later o libusb user-mode driver version 1.0.0.0

 Linux (32-bit or 64-bit)

o Linux (2.4 kernel or later) o Mono Framework 2.0 or later o libusb user-mode driver version 1.0.0.0

Hardware requirements

 Intel Pentium 4, 1 GHz or higher  Minimum of 512 MG of RAM (1 GB or higher recommended)  Video card with 128 MB memory  Video display with 800 x 600 resolution or greater, and 256 colors or greater  Microsoft-compatible mouse

Installing the DAQFlex software library

DAQFlex software operates with standard drivers for Windows, Mac, and Linux. Follow the procedure below specific to your operating system to install the DAQFlex software.

Windows 8, Windows 7, Windows Vista, and Windows XP

1. Go to the DAQFlex download page at www.mccdaq.com/DAQFlexDL and select the Windows 32/64-

bit option.

2. Run the Windows DAQFlex.exe installer file.

3. Follow the installer instructions.

Connect your DAQFlex device after installing the software. You can run the FlexTest.exe test application,

or build and run the C# or VB .NET example programs included in the installation using ExampleBuilder or Visual Studio (version 2005 or later).

Refer to the C# and VB Example Programs chapter on page 96 for instructions on running the DAQFlex example programs, and to the Hardware Reference chapter on page 98 for the API components and messages supported by DAQFlex supported hardware.

DAQFlex Software User's Guide Introducing DAQFlex Software

Windows CE

1. Go to the DAQFlex download page at www.mccdaq.com/DAQFlexDL and select the Windows CE

option.

2. Run the DAQFlex for Windows CE.msi installer file.

3. Follow the installer instructions.

4. After the DAQFlex software is installed, copy the Windows CE device drivers (mccusb.dll and

mccwinceusb.dll) from the DAQFlex for Windows CE\Drivers\ directory (\X86 or \XScale

folder) to the device's Windows directory.

Connect your DAQFlex device after installing the software. You can run the FlexTest.exe, or build and

run the C# or VB .NET example programs included in the installation using Visual Studio (version 2008 or later).

Mac OS X

1. Go to the DAQFlex download page at www.mccdaq.com/DAQFlexDL and select the Mac OS option.

2. Run the DAQFlex installer package (DAQFlex.pkg).

3. Follow the installer instructions.

Connect your DAQFlex device after installing the software. You can run the FlexTest application located in the /Applications/Measurement Computing/DAQFlex folder. Additionally, you can build and run the example programs included in the installation using ExampleBuilder.

Linux

1. Using your Software/Package manager, verify that the Mono framework (version 2.4 or later) and

the libusb user-mode driver are installed on your Linux system.

If these versions aren't listed, information on installing, updating, or adding software repositories to your Software/Package manager can be found at the following links. Click here to go to the Mono web site. Click here to go to the libusb web site.

2. As a root user, create a symbolic link to the libusb-1.0 shared object file. For example:

o ln -s /usr/lib/libusb-1.0.so.0/usr/lib/libusb-1.0.so

The actual file location may vary.

3. Extract the files from the DAQFlex-2.0.tar.gz archive file on the DAQFlex software CD using an

archive manager.

4. In a terminal window, set the current directory to DAQFlex/Source/DAQFlexAPI.

5. As a root user, run the following commands:

o make o make install

6. Restart the system.

Connect your DAQFlex device after installing the software. You can run the FlexTest application by running the command $ flextest from a terminal window. Additionally, you can build and run the C# example programs included in the installation using MonoDevelop or the Mono command line interpreter.

string[] deviceNames;

deviceNames = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

Dim deviceNames As String()

deviceNames = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

Member Name

Description

NameOnly

The returned values contain only the device name.

NameAndSerno

The return values contain the device name with the device serial number formatted as "DeviceName::SerialNumber".

NameAndID

The return values contains the device name with the device's user-defined ID formatted as "DeviceName::DeviceID".

NameSernoAndID

The return values contains the device name, the device serial number and the device's user-defined ID formatted as "DeviceName::SerialNumber::DeviceID".

int deviceNumber = 0;

DaqDevice device;

string deviceName = deviceNames[deviceNumber];

device = DaqDeviceManager.CreateDevice(deviceName);

Chapter 2

Using DAQFlex Software

The following procedure describes how to program a DAQFlex-supported device with DAQFlex software.

1. Add a reference to the DAQFlex assembly to your project.

o In Visual Studio and MonoDevelop, this assembly is listed under the .NET tab of the Add

Reference dialog as DAQFlex API. If your project is a C# project, add the following statement to your source file:

using MeasurementComputing.DAQFlex;

2. Get a list of device names using the static method GetDeviceNames():

GetDeviceNames gets the names of DAQFlex devices detected by the DAQFlex API. DeviceNameFormat

is an enumeration that specifies the format of the returned values. This enumeration defines four different formats:

Note: Each DAQFlex API method will throw an exception if an error occurs, and should be enclosed

within a Try/Catch block.

3. Get a device object using the static method CreateDevice():

DAQFlex Software User's Guide Using DAQFlex Software

Dim deviceNumber As Integer

Dim device As DaqDevice

Dim deviceName As String

deviceNumber = 0

deviceName = deviceNames(deviceNumber)

device = DaqDeviceManager.CreateDevice(deviceName)

DaqResponse response; response = device.SendMessage("AI{0}:RANGE=BIP10V"); // set the input range for channel 0 response = device.SendMessage("?AI{0}:VALUE"); // read a single value from channel 0

Dim response As DaqResponse response = device.SendMessage("AI{0}:RANGE=BIP10V") ' set the input range for channel 0 response = device.SendMessage("?AI{0}:VALUE") ' read a single value from channel 0

string value = response.ToString();

Dim value As String

value = response.ToString()

double value = response.ToValue();

Dim value As Double value = response.ToValue()

DaqDeviceManager.ReleaseDevice(device);

DaqDeviceManager.ReleaseDevice(device)

4. Once you have a DaqDevice object, use the SendMessage() method to program your DAQFlex-

supported device.

 The DaqResponse object contains a method for getting the response as a string and a method for

getting the response as a numeric.

To get the response as a string, use the ToString() method:

To get the response as a numeric, use the ToValue() method:

If the response does not contain a numeric value, ToValue() returns Double.NaN.

When you no longer need the DaqDevice object, you can release it by calling the ReleaseDevice() method:

DAQFlex Software User's Guide Using DAQFlex Software

Reading and writing software-paced I/O

The following examples demonstrate how to perform asynchronous single-point I/O using DAQFlex software:

 Reading an analog input channel  Writing to an analog output channel  Reading a digital bit  Writing to a digital bit  Reading a digital port  Writing to a digital port  Reading a counter input channel

DAQFlex Software User's Guide Using DAQFlex Software

// Read the value of analog input channel 0 String[] Devices; DaqDevice MyDevice; DaqResponse Response;

try {

// Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

// Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices[0]);

// Send device messages using the DaqDevice object MyDevice.SendMessage("AI{0}:RANGE=BIP10V"); MyDevice.SendMessage("AI:CAL=ENABLE"); MyDevice.SendMessage("AI:SCALE=ENABLE");

// Read and display the daq response Response = MyDevice.SendMessage("?AI{0}:VALUE"); label1.Text = Response.ToString();

} catch (Exception ex) {

// handle error label1.Text = ex.Message;

}

' Read the value of analog input channel 0 Dim Devices As String () Dim MyDevice As DaqDevice Dim Response As DaqResponse

Try

' Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

' Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices(0))

' Send device messages using the DaqDevice object MyDevice.SendMessage("AI{0}:RANGE=BIP10V") MyDevice.SendMessage("AI:CAL=ENABLE") MyDevice.SendMessage("AI:SCALE=ENABLE")

' Read and display the daq response Response = MyDevice.SendMessage("?AI{0}:VALUE") Label1.Text = Response.ToString()

Catch Ex As Exception

' handle error Label1.Text = Ex.Message()

End Try

Reading an analog input channel

DAQFlex Software User's Guide Using DAQFlex Software

// Write a value to analog output channel 0 String[] Devices; DaqDevice MyDevice;

try {

// Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

// Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices[0]);

// Send device messages MyDevice.SendMessage("AO{0}:RANGE=BIP10V"); MyDevice.SendMessage("AO:CAL=ENABLE"); MyDevice.SendMessage("AO:SCALE=ENABLE"); MyDevice.SendMessage("AO{0}:VALUE=2.53");

} catch (Exception ex) {

// handle error label1.Text = ex.Message;

}

' Write a value to analog output channel 0 Dim Devices As String() Dim MyDevice As DaqDevice

Try

' Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

' Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices(0))

' Send device messages MyDevice.SendMessage("AO{0}:RANGE=BIP10V") MyDevice.SendMessage("AO:CAL=ENABLE") MyDevice.SendMessage("AO:SCALE=ENABLE") MyDevice.SendMessage("AO{0}:VALUE=2.53")

Catch Ex As Exception

' handle error Label1.Text = Ex.Message

End Try

Writing to an analog output channel

DAQFlex Software User's Guide Using DAQFlex Software

// Read the value of digital port 0, bit 0 String[] Devices; DaqDevice MyDevice; DaqResponse Response;

try {

// Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

// Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices[0]);

// Read and display the daq response MyDevice.SendMessage("DIO{0/0}:DIR=IN"); Response = MyDevice.SendMessage("?DIO{0/0}:VALUE"); label1.Text = Response.ToString();

} catch (Exception ex) {

// handle error label1.Text = ex.Message;

}

' Read the value of digital port 0, bit 0 Dim MyDevice As DaqDevice Dim Response As DaqResponse Dim Devices As String ()

Try

' Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

' Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices(0))

' Read and display the daq response MyDevice.SendMessage("DIO{0/0}:DIR=IN") Response = MyDevice.SendMessage("?DIO{0/0}:VALUE") Label1.Text = Response.ToString()

Catch Ex As Exception

' handle error Label1.Text = Ex.Message

End Try

Reading a digital bit

DAQFlex Software User's Guide Using DAQFlex Software

// Write a value to digital port 0, bit 0 String[] Devices; DaqDevice MyDevice; DaqResponse Response;

try {

// Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

// Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices[0]);

// Send device messages MyDevice.SendMessage("DIO{0/0}:DIR= MyDevice.SendMessage("DIO{0/0}:VALUE= label1.Text = response.ToString();

} catch (Exception ex) }

// handle error label1.Text = ex.Message;

}

' Write a value to digital port 0, bit 0 Dim MyDevice As DaqDevice Dim Response As DaqResponse Dim Devices As String ()

Try

' Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

' Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices(0))

' Send device messages MyDevice.SendMessage("DIO{0/0}:DIR= Response = MyDevice.SendMessage("DIO{0/0}:VALUE= Label1.Text = Response.ToString

Catch Ex As Exception

' handle error Label1.Text = Ex.Message

End Try

Writing to a digital bit

DAQFlex Software User's Guide Using DAQFlex Software

// Read the value of digital port 0 String[] Devices; DaqDevice MyDevice; DaqResponse Response;

try {

// Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

// Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices[0]);

// Send device messages MyDevice.SendMessage("DIO{0}:DIR=IN");

// Read and display the daq response Response = MyDevice.SendMessage("?DIO{0}:VALUE"); Label1.Text = Response.ToString();

} catch (Exception ex) {

// handle error label1.Text = ex.Message;

}

' Read the value of digital port 0 Dim MyDevice As DaqDevice Dim Response As DaqResponse Dim Devices As String ()

Try

' Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

' Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices(0))

' Send device messages MyDevice.SendMessage("DIO{0}:DIR=IN")

' Read and display the daq response Response = MyDevice.SendMessage("?DIO{0}:VALUE") Label1.Text = Response.ToString()

Catch Ex As Exception

' handle error Label1.Text = Ex.Message

End Try

Reading a digital port

DAQFlex Software User's Guide Using DAQFlex Software

// Write a value to digital port 0 String[] Devices; DaqDevice MyDevice; DaqResponse Response;

try {

// Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

// Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices[0]);

// Send device messages MyDevice.SendMessage("DIO{0}:DIR=OUT"); MyDevice.SendMessage("DIO{0}:VALUE=128"); label1.Text = response.ToString();

} catch (Exception ex) }

// handle error label1.Text = ex.Message;

}

' Write a value to digital port 0 Dim MyDevice As DaqDevice Dim Response As DaqResponse Dim Devices As String ()

Try

' Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

' Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices(0))

' Send device messages MyDevice.SendMessage("DIO{0}:DIR=OUT") Response = MyDevice.SendMessage("DIO{0}:VALUE=128") Label1.Text = Response.ToString

Catch Ex As Exception

' handle error Label1.Text = Ex.Message

End Try

Writing to a digital port

DAQFlex Software User's Guide Using DAQFlex Software

// Read counter channel 0 String[] Devices; DaqDevice MyDevice; DaqResponse Response;

try {

// Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

// Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices(0));

// Start the counter MyDevice.SendMessage("CTR{0}:VALUE=0"); MyDevice.SendMessage("CTR{0}:START");

// Read and display the daq response for(int i = 1;i<=10;i++) {

System.Threading.Thread.Sleep(750); Response = MyDevice.SendMessage("?CTR{0}:VALUE"); label1.Text = Response.ToString(); Application.DoEvents();

}

// Stop the counter MyDevice.SendMessage("CTR{0}:STOP");

} catch (Exception ex) {

// handle error label1.Text = ex.Message;

}

' Read counter channel 0 Dim MyDevice As DaqDevice Dim Response As DaqResponse Dim Devices As String ()

Try

' Get a list of message-based DAQ devices Devices = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

' Get a DaqDevice object for device 0 MyDevice = DaqDeviceManager.CreateDevice(Devices(0))

Dim I As Integer

' Start the counter MyDevice.SendMessage("CTR{0}:VALUE=0") MyDevice.SendMessage("CTR{0}:START")

' Read and display the daq response For I = 1 To 10

System.Threading.Thread.Sleep(750) Response = MyDevice.SendMessage("?CTR{0}:VALUE") Label1.Text = Response.ToString() Application.DoEvents()

Reading a counter input channel

DAQFlex Software User's Guide Using DAQFlex Software

' Stop the counter MyDevice.SendMessage("CTR{0}:STOP")

Catch Ex As Exception

' handle error Label1.Text = Ex.Message

End Try

try {

double[,] scanData; string[] names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno); DaqDevice device = DaqDeviceManager.CreateDevice(names[0]);

device.SendMessage("AISCAN:LOWCHAN=0"); device.SendMessage("AISCAN:HIGHCHAN=0"); device.SendMessage("AISCAN:RATE=1000"); device.SendMessage("AISCAN:SAMPLES=5000"); device.SendMessage("AISCAN:START");

scanData = device.ReadScanData(5000, 0);

} catch (Exception ex) {

Console.WriteLine(ex.Message);

}

Try

Dim ScanData As Double(,) Dim Names As String() Dim Device As DaqDevice

Names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno) Device = DaqDeviceManager.CreateDevice(Names(0))

Device.SendMessage("AISCAN:LOWCHAN=0") Device.SendMessage("AISCAN:HIGHCHAN=0") Device.SendMessage("AISCAN:RATE=1000") Device.SendMessage("AISCAN:SAMPLES=5000") Device.SendMessage("AISCAN:START")

ScanData = Device.ReadScanData(5000, 0)

Catch ex As Exception

Console.WriteLine(ex.Message)

End Try

Reading hardware-paced I/O

The basic approach to programming analog input scans is to set the device's scan properties, send the

START command, and call the ReadScanData() method. The following examples show how to program a

basic input scan.

DAQFlex Software User's Guide Using DAQFlex Software

Device.EnableCallback(callbackMethod, callbackType, callbackCount);

Device.EnableCallback(Addressof CallbackMethod, CallbackType, CallbackCount)

void CallbackMethod(ErrorCodes errorCode, CallbackType callbackType, object callbackData)

Sub CallbackMethod(ByVal errorCode As ErrorCodes, ByVal callbackType As CallbackType, _ ByVal callbackData As Object)

Member Name

Description

OnDataAvailable

Specifies that the callback method will be invoked when a specified number of samples becomes available for reading.

OnInputScanComplete

Specifies that the callback method will be invoked when a finite scan has complete or when a continuous scan is stopped.

OnInputScanError

Specifies that the callback method will be invoked when an input scan error occurs.

ReadScanData() parameters

 The first parameter to the ReadScanData method is the number of samples to read.  The second parameter is a time out value in milli-seconds. A value of 0 indicates no timeout

specified.

The ReadScanData method is synchronous, and will return when the number of requested samples are available for reading. When the number of requested samples are available, the DAQFlex software copies the requested number of samples from an internal buffer to a new array of data. The DAQFlex software keeps track of the buffer index so that multiple calls to ReadScanData always return contiguous data.

Internal buffer

An alternative method for reading scan data is to enable a user-defined callback method. When you enable a callback method, the DAQFlex software invokes your user-defined method when a specified number of samples are available for reading, when a scan completes, or if a scan error occurs. This is done using the EnableCallback method as shown below:

The callbackMethod is the name of the method that will be invoked by the DAQFlex software. The callbackMethod is a class method that must have the following form:

The callbackType is an enumeration that defines when the callback method will be invoked.

CallbackType

Only one callback method can be specified for each callback type. When the callback type is set to OnDataAvailable, set the callbackData parameter to the number of samples you wish to receive in the callback method. When the callback type is set to OnInputScanComplete or OnInputScanError, set the callbackData parameter to null or Nothing.

DAQFlex Software User's Guide Using DAQFlex Software

try {

double[,] scanData;

string[] names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno); DaqDevice device = DaqDeviceManager.CreateDevice(names[0]);

device.EnableCallback(OnReadScanData, CallbackType.OnDataAvailable, 1000); device.EnableCallback(OnReadScanData, CallbackType.OnScanComplete, null);

device.SendMessage("AISCAN:LOWCHAN=0"); device.SendMessage("AISCAN:HIGHCHAN=0"); device.SendMessage("AISCAN:RATE=1000"); device.SendMessage("AISCAN:SAMPLES=5000"); device.SendMessage("AISCAN:START");

} catch (Exception ex) {

Console.WriteLine(ex.Message);

}

protected void OnReadScanData(ErrorCodes errorCode, CallbackType callbackType, object callbackData) {

try {

int availableSamples = (int)callbackData; double[,] scanData = device.ReadScanData(availableSamples, 0);

} catch (Exception ex) {

Console.WriteLine(ex.Message);

}

The following are examples of reading scan data using a callback method:

DAQFlex Software User's Guide Using DAQFlex Software

Try

Dim ScanData As Double(,) Dim Names As String() Dim Device As DaqDevice

Names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno) Device = DaqDeviceManager.CreateDevice(Names(0))

Device.EnableCallback(AddressOf OnReadScanData, CallbackType.OnDataAvailable,

1000) Device.EnableCallback(AddressOf OnReadScanData, CallbackType.OnScanComplete, Nothing)

Device.SendMessage("AISCAN:LOWCHAN=0") Device.SendMessage("AISCAN:HIGHCHAN=0") Device.SendMessage("AISCAN:RATE=1000") Device.SendMessage("AISCAN:SAMPLES=5000") Device.SendMessage("AISCAN:START")

Catch ex As Exception

Console.WriteLine(ex.Message)

End Try

Protected Sub ReadScanData(ByVal errorCode As ErrorCodes, ByVal callbackType As CallbackType, _ ByVal callbackData As Object)

Try

Dim AvailableSamples As Integer Dim ScanData As Double(,)

AvailableSamples = DirectCast(callbackData, Integer) ScanData = Device.ReadScanData(AvailableSamples, 0)

Catch ex As Exception

Console.WriteLine(ex.Message)

End Try

try {

double[,] scanData = new double[1, 5000];

string[] names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno); DaqDevice device = DaqDeviceManager.CreateDevice(names[0]);

// fill scanData with data

device.SendMessage("AOSCAN:LOWCHAN=0"); device.SendMessage("AOSCAN:HIGHCHAN=0"); device.SendMessage("AOSCAN:RATE=1000"); device.SendMessage("AOSCAN:SAMPLES=5000"); device.SendMessage("AOSCAN:BUFSIZE=5000");

int timeOut = 0;

device.WriteScanData(scanData, 5000, timeOut);

device.SendMessage("AOSCAN:START");

}

The basic approach to programming analog output scans is to set the device's output scan properties,

call the WriteScanData() method, and send the START command. The following examples show how to

program a basic output scan.

Writing hardware-paced I/O

DAQFlex Software User's Guide Using DAQFlex Software

catch (Exception ex) {

Console.WriteLine(ex.Message);

}

Try

Dim ScanData As Double(,) Dim Names As String() Dim Device As DaqDevice Dim TimeOut As Integer

Names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno) Device = DaqDeviceManager.CreateDevice(Names(0))

Device.SendMessage("AOSCAN:LOWCHAN=0") Device.SendMessage("AOSCAN:HIGHCHAN=0") Device.SendMessage("AOSCAN:RATE=1000") Device.SendMessage("AOSCAN:SAMPLES=5000")

Device.SendMessage("AOSCAN:BUFSIZE=5000")

int TimeOut = 0

Device.WriteScanData(ScanData, 5000, TimeOut)

Device.SendMessage("AOSCAN:START")

Catch ex As Exception

Console.WriteLine(ex.Message)

End Try

WriteScanData() parameters

 The first parameter to the WriteScanData method is the array containing the output scan data.  The second parameter is the number of samples to write.  The last parameter is a timeout value in milliseconds.

The WriteScanData method is synchronous, and will return when the number of samples specified have been written to the device’s output buffer.

Each time the WriteScanData method is called, the data is written to an internal buffer starting at the point after the last sample was written. When an output scan completes or is stopped, the write index is reset to the beginning of the buffer.

Internal buffer

C#:

static string[] GetDeviceNames(DeviceNameFormat format);

VB:

Shared Function GetDeviceNames(ByVal format As DeviceNameFormat) As String()

Value

Return string format

NameOnly

"Device name"

NameAndSerno

"Device name::Device serial number"

NameAndID

"Device name::Device ID"

NameSernoAndID

"Device name::Device serial number::Device ID"

Chapter 3

DAQFlex Software Reference

The DAQFlex Software API is an open source library that implements a simple message-based protocol consisting of text-based commands, or messages. The API is written in C#, is designed for cross platform portability, and does not require a separate configuration utility or a configuration file.

DAQFlex Software API contains two classes:

 DaqDeviceManager class  DaqDevice class

DaqDeviceManager class

The DaqDeviceManager class includes the following methods:

 GetDeviceNames() – gets a list of devices that support the message-based protocol.  CreateDevice() – creates a DaqDevice object, which contains the methods used to communicate

with a DAQ device.

 ReleaseDevice() – frees the resources associated with a DaqDevice object.

DaqDeviceManager.GetDeviceNames()

Gets a list of DAQ devices that support the message-based protocol.

Parameter

format

The format to use for a device name. This parameter is a DeviceNameFormat enumeration. The enumeration values and the format of the return strings are listed below:

Return value

An array of strings containing the device names of all DAQ devices that support the message-based protocol.

Remarks

 The values contained in the array can be used to create a DaqDevice object for the device that you

want to program.

The DaqDevice object is created using the DaqDeviceManager CreateDevice static method.

With the DaqDevice object, all DAQ operations are configured using one API method called

SendMessage() rather than using multiple operation-specific methods.

 The NameOnly format is not useful if multiple devices of the same type are connected, since the

application won't be able to differentiate between one device and the other. If you are using multiple devices of the same type, then use one of the other formats.

DAQFlex Software User's Guide DAQFlex Software Reference

C#:

static CreateDevice(string deviceName);

VB:

Shared Function CreateDevice(ByVal deviceName As String) As DaqDevice

try

{

MyDevice = DaqDeviceManager.CreateDevice(deviceName);

}

catch (Exception ex)

{

// handle exception

}

Try

MyDevice = DaqDeviceManager.CreateDevice(deviceName)

Catch Ex As Exception

' handle exception

End Try

If using a device that does not have an ID assigned, you must use the NameOnly or NameAndSerno

format with the DaqDeviceManager.CreateDevice() method in order to create the device. A device

with no ID will not be created when using the NameAndID and NameSernoAndID format with

CreateDevice().

DaqDeviceManager.CreateDevice()

Creates a DaqDevice object. The DaqDevice object contains the methods used to configure, read data from, or write data to a device. With the DaqDevice object, all DAQ operations are configured using one API method called DaqDevice.SendMessage() rather than using multiple operation-specific methods. SendMessage() takes a single parameter called message. This parameter is a text-based command that the DAQ device parses to configure a particular operation.

Parameter

deviceName

One of the device names returned by the DaqDeviceManager.GetDevicenames() method.

Return value

An instance of a DaqDevice object.

Remarks

 Depending on the DeviceNameFormat, the CreateDevice() method creates a DaqDevice object for

the device whose name, name and serial number, name and id, or name, serial number and id are contained in the deviceName parameter.

 The resources associated with the DaqDevice object can be freed by calling the ReleaseDevice()

method.

 The CreateDevice() method can only be called once for a specific device, unless the ReleaseDevice()

method is called.

 If CreateDevice() is called more than once for a specific device without calling ReleaseDevice(), the

DaqDevice object throws an exception, indicating that a driver handle has already been created for

the device.

Refer to the following sample code:

DAQFlex Software User's Guide DAQFlex Software Reference

C#:

static void ReleaseDevice(DaqDevice device);

VB:

Shared Sub ReleaseDevice(ByVal device As DaqDevice)

C#:

DaqResponse SendMessage (string message);

VB:

Function SendMessage (ByVal Message as String) As DaqResponse

DaqDeviceManager.ReleaseDevice()

Frees the resources associated with a DaqDevice object.

Parameter

Device

A DaqDevice object created by the CreateDevice() method.

DaqDevice class

The DaqDevice class includes the following methods:

 SendMessage() – takes a single text-based command that the DAQ device parses to configure a

particular operation.

 ReadScanData() – reads scan data.  WriteScanData() – outputs scan data.  EnableCallback() – enables a user-defined callback method to be invoked when a certain condition

is met. This method is used in conjunction with input scan operations.

 DisableCallback() – the condition that invokes the callback method.  GetErrorMessage() – gets the error message associated with the error code that is passed to the

user-defined callback.

 GetSupportedMessages() – returns a list of messages supported by a DAQ component.

DaqDevice.SendMessage()

Configures DAQ operations. This method takes a single text-based command that the DAQ device parses to configure a particular operation.

Parameter

Message

The text-based message to send to the device.

Return value

The device response as an instance of a DaqResponse object.

Remarks

 Message is a string containing a text-based command supported by the device, and Response is a

DaqResponse object containing the device's response.

 The DaqResponse object includes two methods:  ToString(): gets the response as a string, for example "AI{0}:VALUE=139".  ToValue(): gets the response as a numeric value, for example "139.0000".  All messages provide a string response, but not all messages provide a numeric response. For those

messages that do not provide a numeric response, the numeric value is set to NaN (not a number).

DAQFlex Software User's Guide DAQFlex Software Reference

try {

DaqResponse response = MyDevice.SendMessage(message); label1.Text = response.ToString();

}

Catch (Exception ex) {

// handle exception label1.Text = ex.Message;

}

Try

DaqResponse Response = MyDevice.SendMessage(Message) Label1.Text = Response.ToString()

Catch Ex As Exception

' handle exception Label1.Text = Ex.Message;

End Try

C#:

double[,] ReadScanData(int samplesRequested, int timeOut);

VB:

Function ReadScanData(ByVal samplesRequested As Integer, ByVal timeOut As Integer) As Double(,)

 The ToString method has additional overloads that accept formatting parameters. The overloads are

ToString(string format), ToString(IFormatProvider provider) and ToString(string format, IFormatProvider provider). The overloads can be used to format the numeric part of a response, if present. If the response does not contain a numeric, these overloads are ignored.

 If an error occurs while sending a message to a device, the SendMessage method will throw an

exception rather than returning an error code. This means the application should encapsulate calls

to SendMessage within a try/catch block.

Refer to the following sample code.

DaqDevice.ReadScanData()

Reads data for a scan operation.

Parameter

samplesRequested

The number of samples per channel to read.

timeOut

The number of milliseconds to wait for the samples requested to become available.

Return value

An array of data samples read from the device.

Remarks

 The DAQFlex library always performs scan operations in the background, but ReadScanData()

always runs in the foreground. When called, ReadScanData() returns control to the application that called it when the number of samples requested has been read. When timeOut is non-zero, if the

number of samples requested isn’t available within the time specified by timeOut, an exception is

thrown. The DAQFlex library manages all memory allocation and array indexing so the application doesn't have to.

DAQFlex Software User's Guide DAQFlex Software Reference

C#:

void WriteScanData(double[,] scanData, int numberOfSamplesPerChannel, int timeOut);

VB:

Sub WriteScanData(ByVal ScanData(,) As Double, ByVal NumberOfSamplesPerChannel As Integer, ByVal TimeOut As Integer)

C#:

void EnableCallback(ErrorCodes errorCode, InputScanCallbackDelegate callback, CallbackType callbackType, Object callbackData

VB:

Sub EnableCallback(ByVal errorCode as ErrorCodes, ByVal callback as InputScanCallbackDelegate, ByVal callbackType As CallbackType, ByVal callbackData As Object)

DaqDevice.WriteScanData()

Outputs scan data.

Parameter

scanData

Array of data samples to output.

numberOfSamplesPerChannel

The number of data samples per channel to transfer from the scanData array to the device's output buffer.

timeOut

The number of milliseconds to wait for available space in the buffer to write to. This only takes effect when an output scan is running.

Remarks

 WriteScanData may be called while a scan is running. However, the maximum number of total

samples must be less than or equal to half the number of samples for which the buffer is allocated. Set the buffer size with the "AOSCAN:BUFSIZE" message.

DaqDevice.EnableCallback()

Enables a user-defined callback method to be invoked when a certain condition is met.

Parameter

callback

The method to be invoked when the condition specified by callbackType is met. Refer to

InputScanCallback Delegate on page 29 for the format of the method.

callbackType

The condition that invokes the callback method. Callback types are defined by the CallbackType enumeration. The supported types are:

o CallbackType.OnDataAvailable – Invokes the callback method when the number of samples

available for reading data is ≥ the number of samples specified by the callbackData parameter.

o CallbackType.OnInputScanComplete – Invokes the callback method when an input scan

completes or is stopped.

o CallbackType.OnInputScanError – Invokes the callback method when an input scan error

occurs.

callbackData

When callbackType is set to OnDataAvailable, set callbackData to the number of samples per channel to acquire before invoking the user-defined callback method. When callbackType is set to OnInputScanComplete or OnInputScanError, set callbackData to null or Nothing.

DAQFlex Software User's Guide DAQFlex Software Reference

C#:

public delegate void InputScanCallbackDelegate(MeasurementComputing.DAQFlex.ErrorCodes errorCode, MeasurementComputing.DAQFlex.CallbackType callbackType, object callbackData)

VB:

Public Delegate Sub InputScanCallbackDelegate(ByVal errorCode As MeasurementComputing.DAQFlex.ErrorCodes, ByVal callbackType As MeasurementComputing.DAQFlex.CallbackType, ByVal callbackData As Object)

C#:

void DisableCallback(CallbackType callbackType)

VB:

Sub DisableCallback(ByVal callbackType As CallbackType)

C#:

string GetErrorMessage(ErrorCodes errorCode)

VB:

Function GetErrorMessage(ByVal errorCode As ErrorCodes)

Return value

The value of callbackType.

Remarks

 This method is used in conjunction with input scan operations.  EnableCallback may be called once for each callback type. If it is called more than once for the

sample callback type, a DaqException is thrown.

InputScanCallback Delegate

A delegate is a data structure that refers either to a static method, or to a class instance and an instance method of that class. You call the delegate by passing either its address or a pointer to the delegate to the callback parameter of the EnableCallback() method.

DaqDevice.DisableCallback()

Disables the invocation of the user-defined callback method associated with the callback type.

Parameter

callbackType The callback type to disable.

DaqDevice.GetErrorMessage()

Gets the error message associated with the error code that is passed to the user-defined callback.

Parameter

errorCode

The error code that was passed to the user-defined callback method.

Return value

The error message associated with the error code passed to the user-defined callback method.

DAQFlex Software User's Guide DAQFlex Software Reference

C#:

public List<string> GetSupportedMessages(string daqComponent);

VB:

Function GetSupportedMessages(ByVal daqComponent As String) As List(Of String)

DaqDevice.GetSupportedMessages()

Gets the messages supported by a DAQ component.

Parameter

daqComponent

A DAQ component, such as AISCAN, DEV, TMR, and so on.

Return value

A list of messages supported by the daqComponent parameter.

Chapter 4

DAQFlex Message Reference

The software messages that you send to a DAQFlex supported device are text-based commands. Each message pertains to a specific DAQ component. A DAQ component is a device element that encapsulates a DAQ subsystem which has multiple properties or commands associated with it.

DAQFlex components

A DAQ component is a device element that encapsulates a DAQ subsystem which has multiple properties or commands associated with it. The DAQFlex API defines the following DAQ components:

 DEV — encapsulates device-level operations  AI — encapsulates single-point analog input operations  AICAL — encapsulates analog input self-calibration  AIQUEUE — encapsulates analog input gain queue operations  AISCAN — encapsulates analog input scanning operations  AITRIG — encapsulates analog input triggering operations  AO — encapsulates single-point analog output operations  AOCAL — encapsulates analog output self-calibration  AOSCAN — encapsulates analog output scanning operations  AOTRIG — encapsulates analog output triggering operations  DIO — encapsulates digital I/O operations  CTR — encapsulates counter input operations  TMR — encapsulates timer output operations

Each component has one or more properties associated with it. Each property supports one or more text-based commands, or messages. These messages are used to communicate with DAQFlexsupported hardware.

DAQFlex supports two types of messages:

 Device programming messages configure or retrieve a device property value.  Device reflection messages retrieve information about a device capability, such as the maximum

scan rate or support for an external clock.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AI

Components for programming a device

Description

Sets and gets property values for analog input channels.

AICAL

Sets and gets property values for calibrating analog inputs.

AIQUEUE

Sets and gets property values for the analog input gain queue.

AISCAN

Sets and gets property values when scanning analog input channels.

AITRIG

Sets and gets analog input trigger property values.

Sets and gets property values for analog output channels

AOCAL

Sets and gets property values for calibrating analog outputs.

AOSCAN

Sets and gets property values when scanning analog output channels.

DEV

Sets and gets device property values.

DIO

Sets and gets property values for digital I/O channels.

CTR

Sets and gets property values for counter channels.

TMR

Sets and gets property values for timer output channels.

Message

"?AI"

Response

"AI=value"

value

The number of A/D channels on the device.

Message

"AI:ADCAL/START"

Response

"AI:ADCAL/START"

Programming messages

Device programming messages are used to get and set device properties. Programming messages that

query a device property always start with the ? character.

Click on a component name below for the string messages, device responses, and property values supported by the component.

Sets and gets property values for analog input channels.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

ADCAL, CAL, CHMODE, CJC, DATARATE, OFFSET, RANGE, RES, SCALE, SENSOR, SLOPE, STATUS, VALIDCHANS, VALUE

(Component only)

 Get the number of analog input channels on a device.

ADCAL

 Start the A/D internal calibration.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AI

Message

"?AI:ADCAL/STATUS"

Response

"AI:ADCAL/STATUS=value"

value

RUNNING, IDLE

Message

"AI:CAL=value"

Response

"AI:CAL"

value

ENABLE, DISABLE

Example

"AI:CAL=ENABLE"

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AI:CAL"

Response

"AI:CAL=value"

value

ENABLE, DISABLE

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AI{ch}:CJC/format"

Response

"AI{ch}:CJC/format=value"

format

DEGC, DEGF, KELVIN

value

The measured temperature.

Example

"?AI{0}:CJC/DEGC"

Message

"AI:CHMODE=value"

Response

"AI:CHMODE"

value

SE, DIFF

Example

"AI:CHMODE=SE"

 Get the status of the A/D internal calibration.

CAL

 Enable or disable calibration of all A/D channels.

 Get a value indicating whether the calibration coefficients will be applied to the raw A/D data.

CJC

 Get the CJC value in the specified format.

CHMODE

 Set the analog input mode to single-ended or differential for all channels.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AI

Message

"AI{ch}:CHMODE=value"

Response

"AI{ch}:CHMODE"

The channel number.

value

SE, DIFF,TC/OTD, TC/NOOTD

Example

"AI{0}:CHMODE=SE"

Message

"?AI:CHMODE"

Response

"AI:CHMODE=value"

value

SE, DIFF, MIXED

Message

"?AI{ch}:CHMODE"

Response

"AI{ch}:CHMODE=value"

The channel number.

value

SE, DIFF,TC/OTD, TC/NOOTD

Message

"AI:DATARATE=value"

Response

"AI:DATARATE"

value

The data rate in S/s.

Example

"AI:DATARATE=100"

Message

"AI{ch}:DATARATE=value"

Response

"AI{ch}:DATARATE"

The channel number.

value

The data rate in S/s.

Example

"AI{0}:DATARATE=10"

Message

"?AI:DATARATE"

Response

"AI:DATARATE=value"

value

The data rate in S/s.

 Set the analog input mode single-ended or differential for a specified channel.

 Get the input mode that is set for all analog inputs.

 Get the input mode that is set for a specified channel.

DATARATE

 Set the A/D data rate in samples per channel for all channels.

 Set the A/D data rate in samples per channel for a specified channel.

 Get the A/D data rate in samples per channel for all channels.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AI

Message

"?AI{ch}:DATARATE"

Response

"AI{ch}:DATARATE=value"

The channel number.

value

The data rate in S/s.

Message

"?AI{ch}:OFFSET"

Response

"AI{ch}:OFFSET=value"

The channel number.

value

The calibration offset.

Example

"?AI{0}:OFFSET"

Message

"AI{ch}:RANGE=value"

Response

"AI{ch}:RANGE"

The channel number.

value

The range value.

Example

"AI{0}RANGE= value"

Note

Call an AI:RANGES Reflection message to get the supported ranges. If the message returned does not include PROG%, then the message does not apply to the device.

If ch is not specified, all channels are set to the range value. If RANGE is not specified, the device power up default value is used.

Message

"?AI{ch}:RANGE"

Response

"AI{ch}:RANGE=value"

The channel number.

value

The range value.

Example

"?AI{0}:RANGE"

Note

Call an AI:RANGES Reflection message to get the supported ranges. If the message returned does not include PROG%, then the message does not apply to the device.

 Get the A/D data rate in samples per channel for a specified channel.

OFFSET

 Get the calibration offset coefficient for the specified channel.

RANGE

 Set the range value for a specified channel.

 Get the range value for a specified channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AI

Message

"?AI:RES"

Response

"AI:RES=value"

value

The ADC resolution, for example S24.

Note

The first character indicates if the value is signed (S) or unsigned (U). The second value indicates the resolution in bits.

Message

"AI:SCALE=value"

Response

"AI:SCALE"

value

ENABLE, DISABLE

Example

"AI:SCALE=

Note

When SCALE is enabled, the device returns values that are converted to an appropriate unit based on the CHMODE property. For example, when CHMODE is set to DIFF, values are returned as voltage. When CHMODE is set to TC/OTD, values are returned as temperature. When SCALE is disabled, values are returned as counts.

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AI:SCALE"

Response

"AI:SCALE=value"

value

ENABLE, DISABLE

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"AI{ch}:SENSOR=TC/value"

Response

" AI:{ch}:SENSOR"

value

The thermocouple type.

Example

"AI{0}:SENSOR=TC/K"

Note

Thermocouple types B, E, J, K, N, R, S, and T are supported.

RES

 Get the resolution of the A/D converter.

SCALE

 Enable or disable scaling of A/D channels.

 Get a value indicating whether scaling will be applied to the A/D channels.

SENSOR

 Set the thermocouple sensor type.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AI

Message

"?AI{ch}:SENSOR"

Response

" AI:{ch}:SENSOR=TC/value"

value

The thermocouple type.

Example

"?AI{0}:SENSOR"

Note

Thermocouple types B, E, J, K, N, R, S, and T are supported.

Message

"?AI{ch}:SLOPE"

Response

"AI{ch}:SLOPE=value"

The channel number.

value

The calibration slope.

Example

"?AI{0}:SLOPE"

Message

"?AI:STATUS"

Response

"AI:STATUS=value"

value

BUSY, ERROR, READY

Message

"?AI:VALIDCHANS"

Response

"AI:VALIDCHANS=value"

value

The valid analog input channel number(s) on the device.

Message

"?AI: VALIDCHANS/CHMODE"

Response

"AI:VALIDCHANS/CHMODE={ch}(mode)"

The channel number.

mode

The channel mode.

Message

"?AI{ch}:VALUE"

Response

"AI{ch}:VALUE=value"

The channel number.

 Get the thermocouple sensor type.

SLOPE

 Get the calibration slope coefficient for the specified channel.

STATUS

 Get the current ADC status of the AI operation.

VALIDCHANS

 Get the number of each valid analog input channel.

 Get the channel mode for each valid analog input channel.

VALUE

 Get the value of an analog input channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AI

value

The channel value.

Example

"?AI{0}:VALUE"

Message

"?AI{ch}:VALUE"

Response

"AI{ch}:VALUE=value"

The channel number.

value

The calibrated A/D count.

Example

"?AI{0}:VALUE"

Message

"?AI{ch}:VALUE/{format}"

Response

"AI{ch}:VALUE/{format}=value"

The channel number.

format

The data format of the measurement:

 RAW: returns uncalibrated A/D counts  VOLTS: returns a calibrated A/D voltage  DEGC: returns a calibrated temperature value in °C  DEGF: returns a calibrated temperature value in °F  KELVIN: returns a calibrated temperature value in Kelvin

value

The A/D value.

Example

"?AI{0}:VALUE/DEGC"

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

 Get the calibrated A/D count of a specified channel.

 Get the A/D value in the specified format.

Working with the CAL and SCALE properties

The ENABLE/DISABLE setting of the CAL and SCALE properties affect the kind of data that is returned:  CAL=DISABLE, SCALE=DISABLE

If CAL and SCALE are both disabled, the data returned will be raw A/D integer values within the range of 0 to 2 to the data by the application software, the data range may be limited to well within these values.

 CAL=ENABLE, SCALE=DISABLE

When CAL is enabled and SCALE is disabled, the format of the analog data returned will depend on the type of calibration implemented. If the calibration factors are stored on the device and applied to the data by the application software, the data will be floating point values, not integer values, and may exceed the theoretical limits and include negative values and values above 2

 SCALE=ENABLE

When SCALE is enabled, scaled floating point values are returned. The limits of the data will depend on the implementation of calibration, as described above. Data range limits may be a small percentage less than or greater than the full scale range selected for devices for which the calibration factors are stored on the device and applied to the data by the application software.

resolution

-1 of the device. If the calibration factors are stored on the device and applied

resolution

-1.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AICAL

Message

"?AICAL:START"

Response

"AICAL:START"

Note

Once the "AICAL:START" message is sent, no other messages other "?AICAL:STATUS" may be sent until the calibration process is complete.

Message

"?AOCAL:STATUS"

Response

"AOCAL:STATUS=value"

value

RUNNING, IDLE

Message

"AIQUEUE{element}:CHAN=value"

Response

"AIQUEUE{element}:CHAN"

element

The number of the element in the gain queue.

value

The channel number.

Example

"AIQUEUE{0}:CHAN=0"

Message

"?AIQUEUE{element}:CHAN"

Response

"AIQUEUE{element}:CHAN=value"

element

The number of the element in the gain queue.

value

The channel number.

AICAL

Gets the manufacturer calibration date and time.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

START, STATUS

START

 Start the A/D internal calibration. This operation calibrates the analog inputs and writes calibration

factors to the board.

STATUS

 Get the status of the A/D internal calibration.

AIQUEUE

Sets and gets property values for the analog input gain queue.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

CHAN, CHMODE, CLEAR, COUNT, DATARATE, RANGE, RESET

CHAN

 Set the channel number for a specified queue element.

 Get the channel number for a specified queue element.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AIQUEUE

Example

"?AIQUEUE{0}:CHAN"

Message

"AIQUEUE{element}:CHMODE=value"

Response

"AIQUEUE{element}:CHMODE"

element

The number of the element in the gain queue.

value

SE, DIFF

Example

"AIQUEUE{0}:CHMODE=DIFF"

Message

"?AIQUEUE{element}:CHMODE"

Response

"AIQUEUE{element}:CHMODE=value"

element

The number of the element in the gain queue.

value

SE, DIFF

Example

"?AIQUEUE{0}:CHMODE"

Message

"AIQUEUE:CLEAR"

Response

"AIQUEUE:CLEAR"

Message

"?AIQUEUE:COUNT"

Response

"AIQUEUE:COUNT=value"

value

The number of elements set in the gain queue.

Example

"AIQUEUE:COUNT=15"

Message

"AIQUEUE{ch}:DATARATE=value"

Response

"AIQUEUE{ch}:DATARATE"

value

The data rate in S/s.

The channel number. If ch is omitted the rate is set for all channels.

Example

"AIQUEUE{0}:DATARATE=10"

CHMODE

 Set the channel mode for a specified queue element.

 Get the channel mode for a specified queue element.

CLEAR

 Removes the elements in the analog input gain queue.

COUNT

 Get the number of elements set in the gain queue.

DATARATE

 Set the A/D data rate in samples per second for one or all channels.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AIQUEUE

Message

"?AIQUEUE{ch}:DATARATE"

Response

"AIQUEUE{ch}:DATARATE=value"

value

The data rate in S/s.

The channel number.

Note

If all channels are not set to the same range the device returns "MIXED".

Message

"AIQUEUE{element}:RANGE=value"

Response

"AIQUEUE:RANGE"

element

The number of the element in the gain queue.

value

The range value.

Example

"AIQUEUE{0}:RANGE=BIP10V"

Message

"?AIQUEUE{element}:RANGE"

Response

"AIQUEUE{element}:RANGE=value"

element

The number of the element in the gain queue.

value

The range value.

Example

"?AIQUEUE{0}:RANGE"

Message

"AIQUEUE:RESET"

Response

"AIQUEUE:RESET"

 Get the A/D data rate in samples per second for a specified channel.

RANGE

 Set the range for a specified queue element.

 Get the range for a specified queue element.

RESET

 Reset the analog input gain queue.

Note

When running the FlexTest utility, AIQUEUE messages are listed on the AISCAN tab.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AISCAN

Message

"AISCAN:BUFOVERWRITE=value"

Response

"AISCAN:BUFOVERWRITE "

value

ENABLE, DISABLE

Example

"AISCAN:BUFOVERWRITE=ENABLE"

Note

 DISABLE (default): Do not monitor the buffer – allow overwrite.  ENABLE: Monitor the buffer and generate an error if unread data is being

overwritten.

Message

"?AISCAN:BUFOVERWRITE"

Response

"AISCAN:BUFOVERWRITE=value"

value

ENABLE, DISABLE

Note

 ENABLE indicates that an attempt to overwrite unread data will generate an error

message.

 DISABLE indicates that no error will be generated when data is overwritten.

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"AISCAN:BUFSIZE=value"

Response

"AISCAN:BUFSIZE"

value

The size in bytes of the buffer.

Example

"AISCAN:BUFSIZE=131072"

Note

 The default buffer size 1,024,000 bytes. This should be sufficient for most

applications. The actual buffer size will always be an integer multiple of the device's maximum packet size.

 If this value is set, it should be at least (the number of bytes per sample) x (number

of channels) x (sample count) for finite mode. In continuous mode, a circular buffer is used, so the size needs to be sufficient to allow reading the data before it is overwritten.

AISCAN

Sets and gets property values when scanning analog input channels.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

BUFOVERWRITE, BUFSIZE, BURSTMODE, CAL, COUNT, EXTPACER, HIGHCHAN, INDEX, LOWCHAN, QUEUE, RANGE, RATE, RESET, SAMPLES, SCALE, START, STATUS, STOP, TEMPUNITS, TRIG, XFRMODE

BUFOVERWRITE

 Enable or disable buffer monitoring to prevent overwriting unread data.

 Get a value indicating whether the buffer is being monitored to prevent data overwrite.

BUFSIZE

 Set the size in bytes of the buffer to be used for AISCAN.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AISCAN

Message

"?AISCAN:BUFSIZE"

Response

"AISCAN:BUFSIZE=value"

value

The size in bytes of the buffer.

Message

"AISCAN:BURSTMODE=value"

Response

"AISCAN:BURSTMODE"

value

ENABLE, DISABLE

Example

"AISCAN:BURSTMODE=ENABLE"

Note

If not set, BURSTMODE is set to DISABLE by default.

Message

"?AISCAN:BURSTMODE"

Response

"AISCAN:BURSTMODE=value"

value

ENABLE, DISABLE

Message

"AISCAN:CAL=value"

Response

"AISCAN:CAL"

value

ENABLE, DISABLE

Example

"AISCAN:CAL=ENABLE"

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AISCAN:CAL"

Response

"AISCAN:CAL=value"

value

ENABLE, DISABLE

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

 Get the size of the buffer used for AISCAN.

BURSTMODE

 Enable or disable the Burst mode scan option.

 Get the state of the Burst mode operation.

CAL

 Enable or disable calibration of the A/D data.

 Get a value indicating whether calibration coefficients will be applied to the raw A/D data.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AISCAN

Message

"?AISCAN:COUNT"

Response

"AISCAN:COUNT=value"

value

The number of samples per channel acquired.

Example

"AISCAN:COUNT=64"

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"AISCAN:EXTPACER=value"

Response

"AISCAN:EXTPACER"

value

ENABLE (for most devices), DISABLE

Example

"AISCAN:EXTPACER= ENABLE"

Note

 Some devices support ENABLE/MASTER, ENABLE/SLAVE, or ENABLE/GSLAVE.  For devices which do not support a master and slave configuration, the /MASTER and

/SLAVE designation is ignored.

 For devices which do not support disabling of the pacer or SYNC input (for example,

the terminal is always enabled as either input or output), the DISABLE designation is invalid.

 Set to ENABLE if the device is paced using a continuous clock source, such as a

generator. In this mode, the first clock pulse after setting up the scan is ignored in order to ensure adequate setup time for the first conversion.

 Set to ENABLE/GSLAVE if the device is paced from a DAQFlex supported device. In

this mode, the first clock pulse after setting up the scan is held off to ensure adequate setup time for the first conversion. No pulses are ignored.

 When the external pacer is enabled, the AISCAN:RATE property should be set to

approximately what the external pacer rate will be, because internal transfer sizes are calculated using the rate and channel count.

 When not specified, the default is DISABLE.

Message

"?AISCAN:EXTPACER"

Response

"AISCAN:EXTPACER=value"

The channel number.

value

ENABLE (for most devices).

Note

Some devices support ENABLE/MASTER, ENABLE/SLAVE, ENABLE/GSLAVE, DISABLE/MASTER, or DISABLE/SLAVE.

COUNT

 Get the number of samples per channel that have been acquired by the AISCAN operation.

EXTPACER

 Set the configuration of the device's external pacer pin.

 Get the configuration of the device's external pacer pin.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AISCAN

Message

"AISCAN:HIGHCHAN=value"

Response

"AISCAN:HIGHCHAN"

value

The channel number.

Example

"AISCAN:HIGHCHAN=3"

Message

"?AISCAN:HIGHCHAN"

Response

"AISCAN:HIGHCHAN=value"

value

The channel number.

Message

"AISCAN:INDEX=

Response

"AISCAN:INDEX"

value

The current location of the pointer in the buffer.

Example

"AISCAN:COUNT=765"

Note

INDEX tracks COUNT in finite mode, and recycles at BUFSIZE in continuous mode; this accounts for sample size, number of channels, and so on.

Message

"AISCAN:LOWCHAN=value"

Response

"AISCAN:LOWCHAN"

value

The channel number.

Example

"AISCAN:LOWCHAN=0"

Message

"?AISCAN:LOWCHAN"

Response

"AISCAN:LOWCHAN=value"

value

The channel number.

Message

"AISCAN:QUEUE=value"

Response

"AISCAN:QUEUE"

value

ENABLE, DISABLE, or RESET

HIGHCHAN

 Set the last channel to include in the hardware-paced scan operation.

 Get the last channel to include in the hardware-paced scan operation.

INDEX

 Get the current location of the pointer in the buffer.

LOWCHAN

 Set the first channel to include in the hardware-paced scan operation.

 Get the first channel to include in the hardware-paced scan operation.

QUEUE

 Enable or disable the analog input gain queue.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AISCAN

Example

"AISCAN:QUEUE=ENABLE"

Note

RESET resets the queue count to 0, and disables the gain queue.

Message

"?AISCAN:QUEUE"

Response

"AISCAN:QUEUE=value"

value

ENABLE, DISABLE

Message

"AISCAN:RANGE=value"

Response

"AISCAN:RANGE"

value

The range value.

Note

Call an AI:RANGES Reflection message to get the supported ranges. If the message returned does not include PROG%, then the message does not apply to the device.

Message

"?AISCAN:RANGE"

Response

"AISCAN:RANGE=value"

value

The range value.

Note

If all channels are not set to the same range the device returns "MIXED".

Message

"AISCAN:RANGE{ch}=value"

Response

"AISCAN:RANGE{qcnt/ch}" (when QUEUE is enabled) "AISCAN:RANGE{ch}" (when QUEUE is disabled.)

The response behavior is dependent on the QUEUE setting:

 When QUEUE is enabled, an element is added to the queue and the specified channel

is set to the range specified.

 When QUEUE is disabled, the specified channel is set to the range specified.

qcnt

The position of the element in the gain queue. This number increments by 1 for each successive message sent.

The channel number.

value

The range value (see values listed above).

Example

"AISCAN:RANGE{2}=BIP20V"

Message

"AISCAN:RANGE{element/ch}=value"

Response

"AISCAN:RANGE{element/ch}"

 Read whether the gain queue is used in the scanning operation.

RANGE

 Set the range for all analog input channels to be scanned.

 Get the range that is set for the analog input channels to be scanned.

 Add the range value as the next element in the gain queue, or set the range value for a specified

channel (depending on the queue setting).

 Set a specified element in the queue to a specified range (value) and channel (ch).

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AISCAN

element

The position of the element in the gain queue.

The channel number.

value

The range value.

Example

"AISCAN:RANGE{0/1}=BIP20V"

Note

If element is greater than the size of the queue, the size of the queue is expanded to element + 1.

Message

"?AISCAN:RANGE{x}"

Response

"AISCAN:RANGE{element/ch}=value" when QUEUE is enabled, or "AISCAN:RANGE{ch}=value" when QUEUE is disabled.

x When QUEUE is disabled, x denotes the channel for which the range is returned. When QUEUE is enabled, x denotes the element in the queue for which the range is returned.

element

The position of the element in the gain queue.

The channel number.

value

The range value. If all channels are not set to the same range, value returns MIXED.

Message

"AISCAN:RATE=value"

Response

"AISCAN:RATE"

value

0 to N

Example

"AISCAN:RATE=1000"

Note

If value is set is less than the device's minimum sampling rate, the minimum rate is used. If value is set is greater than the device's maximum sampling rate, the maximum rate is used. Check the actual scan rate set using the "?AISCAN:RATE" query after setting the RATE.

Message

"?AISCAN:RATE"

Response

"AISCAN:RATE=value"

value

A value between the device's minimum and maximum rate.

Note

The value returned may not match the value requested using the "AISCAN:RATE=value" message due to device limitations. If the value returned is at or near the device's maximum sampling rate, you should keep to a minimum other messages sent to the device. Otherwise, a data overrun may occur. A data overrun occurs when the device fills its buffer with data faster than it is read back.

 Get the range value for a specified element or channel.

RATE

 Set the A/D pacer rate in Hz.

 Get the A/D pacer rate in Hz.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AISCAN

Message

"AISCAN:RESET"

Response

"AISCAN:RESET"

Message

"AISCAN:SAMPLES=value"

Response

"AISCAN:SAMPLES"

value

0 to N

Example

"AISCAN:SAMPLES=1000"

Note

A value of 0 results in a continuous scan.

Message

"?AISCAN:SAMPLES"

Response

"AISCAN:SAMPLES=value"

value

0 to N

Note

A value of 0 indicates a continuous scan.

Message

"AISCAN:SCALE=value"

Response

"AISCAN:SCALE"

value

ENABLE, DISABLE

Example

"AISCAN:SCALE=ENABLE"

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AISCAN:SCALE"

Response

"AISCAN:SCALE=value"

value

ENABLE, DISABLE

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

RESET

 Reset the status of the AISCAN operation.

SAMPLES

 Set the number of samples/channel to acquire in the scan.

 Get the number of samples/channel acquired.

SCALE

 Enable or disable scaling of the A/D data.

 Get a value indicating whether scaling will be applied to the A/D data.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AISCAN

Message

"AISCAN:START"

Response

"AISCAN:START"

Message

"?AISCAN:STATUS"

Response

"AISCAN:STATUS=value"

value

IDLE, RUNNING, or OVERRUN

Message

"AISCAN:STOP"

Response

"AISCAN:STOP"

Message

"AISCAN:TEMPUNITS=value"

Response

"AISCAN:TEMPUNITS"

value

DEGC, DEGF, KELVIN

Example

"AISCAN:TEMPUNITS=DEGC"

Message

"?AISCAN:TEMPUNITS"

Response

"AISCAN:TEMPUNITS=value"

value

DEGC, DEGF, KELVIN

Message

"AISCAN:TRIG=value"

Response

"AISCAN:TRIG"

value

ENABLE, DISABLE

Example

"AISCAN:TRIG=ENABLE"

Note

If not set, TRIG is set to DISABLE by default.

Message

"?AISCAN:TRIG"

Response

"AISCAN:TRIG=value"

START

 Start an analog input scan.

STATUS

 Get the status of the analog input scan operation.

STOP

 Stop an analog input scan operation.

TEMPUNITS

 Set the unit used for temperature measurements.

 Get the unit used for temperature measurements.

TRIG

 Enable or disable the external trigger option.

 Get the trigger status.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AITRIG

value

ENABLE, DISABLE

Message

"AISCAN:XFRMODE=value"

Response

"AISCAN:XFRMODE"

value

SINGLEIO, BLOCKIO, BURSTIO

Example

"AISCAN:XFRMODE=BURSTIO"

Note

For SINGLEIO, the device transfers data after one sample per channel is acquired. For BURSTIO, the number of samples is limited to the size of the device FIFO.

Message

"?AISCAN:XFRMODE"

Response

"AISCAN:XFRMODE=value"

value

SINGLEIO, BLOCKIO, BURSTIO

Message

"AITRIG:REARM=value"

Response

"AITRIG:REARM"

value

ENABLE, DISABLE

XFRMODE

 Set the transfer mode for analog input scan data.

 Get the transfer mode that is set for the scan.

Working with the CAL and SCALE properties

The ENABLE/DISABLE setting of the CAL and SCALE properties affect the kind of data that is returned:  CAL=DISABLE, SCALE=DISABLE

If CAL and SCALE are both disabled, the data returned will be raw A/D integer values within the range of 0 to 2

resolution

-1 of the device. If the calibration factors are stored on the device and applied

to the data by the application software, the data range may be limited to well within these values.

 CAL=ENABLE, SCALE=DISABLE

resolution

–1.

 SCALE=ENABLE

AITRIG

Sets and gets analog input trigger property values.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

REARM, SRC, TYPE

REARM

 Set the state of the retrigger mode.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AITRIG

Example

"AITRIG:REARM=ENABLE"

Message

"?AITRIG:REARM"

Response

"AITRIG:REARM=value"

value

ENABLE, DISABLE

Message

"AITRIG:SRC=value"

Response

"AITRIG:SRC"

value

HWSTART/trig

trig

DIG

Example

"AITRIG:SRC=DIG"

Message

"?AITRIG:SRC"

Response

"AITRIG:SRC=value"

value

HWSTART/trig

trig

DIG

Message

"AITRIG:TYPE=value"

Response

"AITRIG:TYPE"

value

type/condition

type

EDGE, LEVEL

condition

RISING, FALLING when type is EDGE HIGH, LOW when type is LEVEL

Example

"AITRIG:TYPE=EDGE/RISING"

Message

"?AITRIG:TYPE"

Response

"AITRIG:TYPE=value"

value

EDGE/RISING, EDGE/FALLING

 Get the state of the retrigger mode.

SRC

 Set the trigger source.

 Get the trigger source.

TYPE

 Set the edge trigger type and condition.

 Get the trigger type and condition.

Note

When running the FlexTest utility, AITRIG messages are listed on the AISCAN tab.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AO

Message

"?AO"

Response

"AO=value"

value

The number of D/A channels on the device.

Message

"AO:CAL=value"

Response

" AO:CAL"

value

ENABLE, DISABLE

Example

" AO:CAL=ENABLE"

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AO{ch}:OFFSET"

Response

"AO{ch}:OFFSET=value"

The D/A channel number.

value

The value of the calibration offset.

Example

"?AO{0}:OFFSET"

Message

"?AO{ch}:RANGE"

Response

"AO{ch}RANGE=value"

The D/A channel number.

value

The range value.

Example

"?AO{0}:RANGE"

Sets and gets property values for analog output channels.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

CAL, OFFSET, RANGE, REG, RES, SCALE, SLOPE, UPDATE, VALUE

(Component only)

 Get the number of analog output channels on the device.

CAL

 Enable or disable calibration of all D/A channels.

OFFSET

 Get the calibration offset for a specified channel, currently set range and channel mode.

RANGE

 Get the range value for a specified channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AO

Message

"AO{ch}:REG=value"

Response

"AO{ch}:REG"

0, 1 value

0 to 65535

Example

"AO{0}:REG=1455"

Note

This message is only supported by devices with simultaneous DAC output capability. Use with AO:UPDATE to simultaneous update the DAC outputs.

Use AO:VALUE to set the DAC value on devices with non-simultaneous output.

Message

"?AO{ch}:REG "

Response

"AO{ch}:REG=value "

0, 1 value

0 to 65535

Example

"?AO{1}:REG"

Message

"?AO:RES"

Response

"AO:RES=value"

value

U16

Note

The first character indicates if the value is signed (S) or unsigned (U). The second value indicates the resolution in bits.

Message

"AO:SCALE=value"

Response

"AO:SCALE"

value

ENABLE, DISABLE

Example

"AO:SCALE=ENABLE"

Note

When enabled, the device accepts voltage values. When disabled, the device accepts count values.

This message is processed by the DAQFlex Software library, and is not sent to the device.

REG

 Set the value of a DAC channel that supports simultaneous output without updating the output.

 Get the value of a DAC channel that supports simultaneous output.

RES

 Get the resolution of the D/A converter.

SCALE

 Enable or disable scaling of all D/A channels.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AO

Message

"?AO:SCALE"

Response

"AO:SCALE=value"

The channel number.

value

ENABLE, DISABLE

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AO{ch}:SLOPE"

Response

"AO{ch}:SLOPE=value"

The D/A channel number.

value

The value of the calibration slope.

Example

"?AO{0}:SLOPE"

Message

"AO:UPDATE"

Response

"AO:UPDATE"

Note

Use AO{ch}:REG to set the value of each DAC channel.

Message

"AO{ch}:VALUE=value"

Response

"AO{ch}:VALUE"

The D/A channel number.

value

The channel value.

Example

"AO{0}:VALUE=1455"

 Get a value indicating whether scaling will be applied to the D/A channels.

SLOPE

 Get the calibration slope for a specified channel, currently set range and channel mode.

UPDATE

 Simultaneously update DAC channels.

VALUE

 Set the value of an analog output channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AOCAL

Message

"?AOCAL:START"

Response

"AOCAL:START"

Note

Once the "AOCAL:START" message is sent, no other messages other than "?AOCAL:STATUS" may be sent until the calibration process is complete.

Message

"?AOCAL:STATUS"

Response

"AOCAL:STATUS=value""

value

RUNNING, IDLE

Message

"AOSCAN:BUFSIZE=value"

Response

"AOSCAN:BUFSIZE"

value

The size in bytes of the output buffer.

Example

"AOSCAN:BUFSIZE=65536"

Notes

The default buffer size is 65536 bytes. This should be sufficient for most applications. The actual buffer size will always be an integer multiple of the device's maximum packet size.

Message

"?AOSCAN:BUFSIZE"

Response

"AOSCAN:BUFSIZE=value"

AOCAL

Gets the manufacturer calibration date and time.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

START, STATUS

START

 Start the D/A internal calibration. This operation calibrates the analog outputs and writes calibration

factors to the board.

STATUS

 Get the status of the D/A internal calibration.

AOSCAN

Sets and gets property values when scanning analog output channels.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

BUFSIZE, CAL, COUNT, EXTPACER, HIGHCHAN, INDEX, LOWCHAN, RANGE, RATE, SAMPLES, SCALE, START, STATUS, STOP

BUFSIZE

 Set the size in bytes of the buffer used for analog output scanning operations.

 Get the size of the buffer used for AOSCAN.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AOSCAN

value

The size in bytes of the output buffer.

Example

"?AOSCAN:BUFSIZE"

Message

"AOSCAN:CAL=value"

Response

"AOSCAN:CAL"

value

ENABLE, DISABLE

Example

"AOSCAN:CAL=ENABLE"

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AOSCAN:CAL"

Response

"AOSCAN:CAL=value"

value

ENABLE, DISABLE

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AOSCAN:COUNT"

Response

"AOSCAN:COUNT=value"

value

The number of samples per channel sent to the device buffer.

Example

"AOSCAN:COUNT=64"

Note

This message is processed by DAQFlex Software library, and is not sent to the device.

Message

"AOSCAN:EXTPACER=value"

Response

"AOSCAN:EXTPACER"

value

ENABLE, DISABLE

Example

"AOSCAN:EXTPACER=ENABLE"

Message

"?AOSCAN:EXTPACER"

Response

"AOSCAN:EXTPACER=value"

value

ENABLE, DISABLE

CAL

 Enable or disable calibration of the D/A data.

 Get a value indicating whether calibration coefficients will be applied to the raw D/A data.

COUNT

 Get the number of samples per channel that have been sent to the device by the AOSCAN

operation.

EXTPACER

 Set the state of the D/A clock.

 Get the state of the D/A clock.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AOSCAN

Message

"AOSCAN:HIGHCHAN=value"

Response

"AOSCAN:HIGHCHAN"

value

The channel number.

Example

"AOSCAN:HIGHCHAN=1"

Message

"?AOSCAN:HIGHCHAN"

Response

"AOSCAN:HIGHCHAN=value"

value

The channel number.

Message

"?AOSCAN:INDEX"

Response

"AOSCAN:INDEX=value"

value

The current location of the pointer in the buffer.

Example

"AOSCAN:COUNT=765"

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"AOSCAN:LOWCHAN=value"

Response

"AOSCAN:LOWCHAN"

value

The channel number.

Example

"AOSCAN:LOWCHAN=0'

Message

"?AOSCAN:LOWCHAN"

Response

"AOSCAN:LOWCHAN=value"

value

The channel number.

Message

"?AOSCAN:RANGE{ch}"

Response

"AOSCAN:RANGE{ch}=value"

The D/A channel number.

HIGHCHAN

 Set the last D/A channel to include in the analog output scan operation.

 Get the last D/A channel to include in the analog output scan operation.

INDEX

 Get the current location of the output pointer in the buffer.

LOWCHAN

 Set the first D/A channel to include in the analog output scan operation.

 Get the first D/A channel to include in the analog output scan operation.

RANGE

 Get the analog output range set for the D/A channels.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AOSCAN

value

The range value. If the D/A channels are not set to the same range value returns MIXED.

Example

"AOSCAN:RANGE{0}=BIP10V"

Message

"AOSCAN:RATE=value"

Response

"AOSCAN:RATE"

value

>0 (float)

Example

"AOSCAN:RATE=1000"

Message

"?AOSCAN:RATE"

Response

"?AOSCAN:RATE=value"

value

1 to the maximum rate of the device.

Example

"?AOSCAN:RATE"

Message

"AOSCAN:RESET"

Response

"AOSCAN:RESET"

Message

"AOSCAN:SAMPLES=value"

Response

"AOSCAN:SAMPLES"

value

0 to N

Example

"AOSCAN:SAMPLES=1000"

Note

Set value to 0 for a continuous scan.

Message

"?AOSCAN:SAMPLES"

Response

"AOSCAN:SAMPLES=value"

value

A numeric value.

Example

"?AOSCAN:SAMPLES"

RATE

 Set the D/A pacer rate in Hz.

 Get the D/A pacer rate in Hz.

RESET

 Reset the status of the AOSCAN operation.

SAMPLES

 Set the number of samples per channel to output.

 Get the number of samples per channel to output.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AOSCAN

Message

"AOSCAN:SCALE=value"

Response

"AOSCAN:SCALE"

value

ENABLE, DISABLE

Example

"AOSCAN:SCALE=ENABLE"

Note

When enabled, the device accepts voltage values. When disabled, the device accepts count values.

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"?AOSCAN:SCALE"

Response

"AOSCAN:SCALE=value"

value

ENABLE, DISABLE

Note

This message is processed by the DAQFlex Software library, and is not sent to the device.

Message

"AOSCAN:START"

Response

"AOSCAN:START"

Message

"?AOSCAN:STATUS"

Response

"AOSCAN:STATUS=value"

value

IDLE, RUNNING, or UNDERRUN

Example

"AOSCAN:STATUS=RUNNING"

Message

"AOSCAN:STOP"

Response

"AOSCAN:STOP"

SCALE

 Enable or disable scaling of the D/A data.

 Get a value indicating whether scaling will be applied to the D/A data.

START

 Start an analog output scan.

STATUS

 Get the status of the AOSCAN operation.

STOP

 Stop an analog output scan.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – AOTRIG

Message

"AOTRIG:TYPE=value"

Response

"AOTRIG:TYPE"

value

EDGE/RISING, EDGE/FALLING

Example

"AOTRIG:TYPE=EDGE/RISING"

Message

"?AOTRIG:TYPE"

Response

"AOTRIG:TYPE=value"

value

EDGE/RISING, EDGE/FALLING

Message

"?CTR"

Response

"CTR=value"

value

The number of counter channels on a device.

Message

"CTR{ch}:START"

Response

"CTR{ch}:START"

The number of the counter channel.

Example

"CTR{0}:START"

AOTRIG

Sets and gets analog output trigger property values.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

TYPE

 Set the trigger edge.

 Get the trigger edge.

CTR

Sets and gets property values for counter channels.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

START, STOP, VALUE

(Component only)

 Get the number of counter channels on a device.

START

 Start a specified counter channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – DEV

Message

"CTR{ch}:STOP"

Response

"CTR{ch}:STOP"

The number of the counter channel.

Example

"CTR{0}:STOP"

Message

"CTR{ch}:VALUE=value"

Response

"CTR{ch}:VALUE"

The number of the counter channel.

value

The value to load onto the counter channel (0 to 232 – 1).

Example

"CTR{0}:VALUE=0"

Note

Setting a value of 0 resets the counter to 0.

Message

"?CTR{ch}:VALUE"

Response

"CTR{ch}:VALUE=value"

The number of the counter channel.

value

The value of the counter channel.

Example

"?CTR{0}:VALUE"

Message

"DEV:FLASHLED/{n}"

Response

"DEV:FLASHLED"

n A number indicating how many times to flash the device LED.

Example

"DEV:FLASHLED/5"

STOP

 Stop a specified counter channel.

VALUE

 Load the specified counter channel with a value.

 Get the value of the specified counter channel.

DEV

Sets and gets device property values.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

FLASHLED, FPGACFG, FPGAV, FWV, ID, MFGCAL, MFGSER, RESET, STATUS/ISO, TEMP, VEXT

FLASHLED

 Flash the device LED.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – DEV

Message

"DEV:FPGACFG/<unlock code>"

Response

"DEV:FPGACFG"

unlock code

Device-specific hex value.

Example

"DEV:FPGACFG/0xAD"

Note

The device must be in FPGA configuration mode in order to update the device's FPGA configuration.

Message

"?DEV:FPGACFG"

Response

"DEV:FPGACFG=value"

value

CONFIGURED, CONFIGMODE

Note

CONFIGURED indicates that the device's FPGA is currently configured. CONFIGMODE indicates that the device's FPGA is not currently configured.

Message

"?DEV:FPGAV"

Response

"DEV:FPGAV=value"

value

The firmware version of the device FPGA.

Example

"DEV:FPGAV=2.05"

Message

"?DEV:FWV"

Response

"DEV:FWV=value"

value

The firmware version on the device.

Example

"DEV:FWV=01.02" or "DEV:FWV=01.01.00f00"

Message

"DEV:ID=value"

Response

"DEV:ID"

value

The ID set for the device. ID is set to MYDEVICE by default.

Example

"DEV:ID=MYDEVICE"

Note

The number of characters supported by value is device-dependent.

FPGACFG

 Put the device into FPGA configuration mode.

 Get the status of the device's FPGA.

FPGAV

 Get the firmware version of the device FPGA.

FWV

 Get the firmware version on the device.

 Set the device ID.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – DEV

Message

"?DEV:ID"

Response

"DEV:ID=value"

value

The ID set for the device.

Message

"?DEV:MFGCAL"

Response

"DEV:MFGCAL=value"

value

The calibration date and time.

Example

"DEV:MFGCAL=2009-04-13 11:56:27"

Message

"?DEV:MFGCAL{YEAR}"

Response

"DEV:MFGCAL{YEAR}=value"

YEAR

The calibration year.

Example

"DEV:MFGCAL{YEAR}=2013"

Message

"?DEV:MFGCAL{MONTH}"

Response

"DEV:MFGCAL{MONTH}=value"

MONTH

The calibration month.

Example

"DEV:MFGCAL{MONTH}=04"

Message

"?DEV:MFGCAL{DAY}"

Response

"DEV:MFGCAL{DAY}=value"

DAY

The calibration day.

Example

"DEV:MFGCAL{DAY}=13"

Message

"?DEV:MFGCAL{HOUR}"

Response

"DEV:MFGCAL{HOUR}=value"

HOUR

The calibration hour.

Example

"DEV:MFGCAL{HOUR}=11"

 Get the device ID.

MFGCAL

 Get the date and time in which the device was last calibrated.

 Get the year in which the device was last calibrated.

 Get the month in which the device was last calibrated.

 Get the day in which the device was last calibrated.

 Get the hour in which the device was last calibrated.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – DEV

Message

"?DEV:MFGCAL{MINUTE}"

Response

"DEV:MFGCAL{MINUTE}=value"

MINUTE

The calibration minute.

Example

"DEV:MFGCAL{MINUTE}=56"

Message

"?DEV:MFGCAL{SECOND}"

Response

"DEV:MFGCAL{SECOND}=value"

SECOND

The calibration second.

Example

"DEV:MFGCAL{SECOND}=27"

Message

"?DEV:MFGSER"

Response

"DEV:MFGSER=value"

value

The serial number of the device.

Example

"DEV:MFGSER=00000001"

Message

"DEV:RESET/value"

Response

"The device is not responding" when value is set to SYSTEM. (SYSTEM resets the USB interface to the device, and the device cannot send a response; this value is not recommended for use through the software).

"DEV:RESET" when value is set to DEFAULT. (DEFAULT resets all device parameters to the default value.)

value

SYSTEM, DEFAULT

Example

"DEV:RESET/DEFAULT"

Message

"?AI:STATUS/ISO"

Response

"AI:STATUS=value"

value

READY, NOTREADY

 Get the minute in which the device was last calibrated.

 Get the second in which the device was last calibrated.

MFGSER

 Get the manufacturer serial number of the device.

RESET

 Reset the device or the default parameters.

STATUS/ISO

 Get the status of the isolated microcontroller.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – DIO

Message

"?DEV:TEMP{tempnum}"

Response

"DEV:TEMP{tempnum}=value"

tempnum

The number of the temperature sensor on the device.

value

The internal temperature in °C.

Example

"DEV:TEMP{0}=21"

Message

"?DEV:VEXT"

Response

"DEV: VEXT =value"

value

True, False

Message

"?DIO"

Response

"DIO=value"

value

The number of digital ports.

Message

"?DIO{port}"

Response

"DIO{port}=value"

value

The number of bits on the port.

Example

"?DIO{0}"

Message

"DIO{port}:DIR=value"

Response

"DIO{port}:DIR"

port

The port number.

TEMP

 Get the device internal temperature in °C.

VEXT

 Get a value indicating whether external power is supplied to the device.

DIO

Sets and gets property values for digital I/O channels.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

DIR, LATCH, VALUE

(Component only)

 Get the number of digital ports on a device.

 Get the number of bits on a port.

DIR

 Set the direction of a port.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – DIO

value

IN, OUT

Example

"DIO{0}:DIR=IN"

Note

For devices that support this message, the default power up value is "IN".

Message

"?DIO{port}:DIR"

Response

"DIO{port}:DIR=value"

port

The port number.

value

IN, OUT, or a number between 0 and 2n -1, where n is the number of bits in the port.

Note

If the digital bits are not individually configurable, the value returned is either "IN" or "OUT." If each digital bit is individually configurable, value is a bit mask, in which 1 indicates that the bit is configured for input, and 0 indicates that the bit is configured for output.

Message

"DIO{port/bit}:DIR=value"

Response

"DIO{port/bit}:DIR"

port

The port number.

bit

The bit number.

value

IN, OUT

Example

"DIO{0/1}:DIR=IN"

Note

For devices that support this message, the default power up value is "IN".

Message

"?DIO{port/bit}:DIR"

Response

"DIO{port/bit}:DIR=value"

port

The port number.

bit

The bit number.

value

IN, OUT

Example

"?DIO{0/1}:DIR"

Message

"DIO{port}:LATCH=value"

Response

"DIO{port}:LATCH"

 Get the direction of a port.

 Set the direction of a bit.

 Get the direction of a bit.

LATCH

LATCH applies to programmable ports. This property lets you set a digital output value while in input mode. When programmed for output mode the latch value will be at the output.

 Set the latch value of a port.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – DIO

port

The port number (0).

value

The port value (0 to 255).

Example

"DIO{0}:LATCH=128"

Message

"?DIO{port}:LATCH"

Response

"DIO{port}:LATCH=value"

port

The port number.

value

The port value.

Example

"?DIO{0}:LATCH"

Message

"DIO{port/bit}:LATCH=value"

Response

"DIO{port/bit}:LATCH"

port

The port number.

bit

The bit number.

value

The bit value.

Example

"DIO{0/1}:LATCH=1"

Message

"?DIO{port/bit}:LATCH"

Response

"DIO{port/bit}:LATCH=value"

port

The port value.

bit

The bit number.

value

The bit value.

Example

"?DIO{0/1}:LATCH"

Message

"DIO{port}:VALUE=value"

Response

"DIO{port}:VALUE"

port

The port number.

value

The value of the port.

Example

"DIO{0}:VALUE=128"

Note

Performing an output operation on a programmable port that has not been configured for output will generate an error.

 Get the latch value of a port.

 Set the latch value of a bit.

 Get the latch value of a bit.

VALUE

 Set the value of a port.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – TMR

Message

"?DIO{port}:VALUE"

Response

"DIO{port}:VALUE=value"

port

The port number.

value

The value of the port.

Example

"?DIO{0}:VALUE"

Message

"DIO{port/bit}:VALUE=value"

Response

"DIO{port/bit}:VALUE"

port

The port number.

bit

The bit number.

value

The value of the bit.

Example

"DIO{0/1}:VALUE=1"

Note

Performing an output operation on a programmable port that has not been configured for output will generate an error.

Message

"?DIO{port/bit}:VALUE"

Response

"DIO{port/bit}:VALUE=value"

port

The port number.

bit

The bit number.

value

The value of the bit.

Example

"?DIO{0/1}:VALUE"

Message

"?TMR"

Response

"TMR=value"

value

The number of timer output channels.

 Get the value of a port.

 Set the value of a bit.

 Get the value of a bit.

TMR

Sets and gets property values for a timer output channel.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

DELAY, DUTYCYCLE, IDLESTATE, PERIOD, PULSE, PULSECOUNT, START, STOP

(Component only)

 Get the number of timer output channels on the device.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – TMR

Message

"TMR{ch}:DELAY=value"

Response

"TMR{ch}:DELAY"

The channel number.

value

The time in milliseconds (mS).

Example

"TMR{0}:DELAY=100"

Message

"?TMR{ch}:DELAY"

Response

"TMR{ch}:DELAY=value"

The channel number.

value

The time in milliseconds (mS).

Example

"?TMR{0}:DELAY"

Message

"TMR{ch}:DUTYCYCLE=value"

Response

"TMR{ch}:DUTYCYCLE"

The channel number.

value

The duty cycle in percent (%). When not specified value is set to 50%.

Example

"TMR{0}:DUTYCYCLE=100"

Message

"?TMR{ch}:DUTYCYCLE"

Response

"TMR{ch}:DUTYCYCLE=value"

The channel number.

value

The duty cycle in percent (%).

Example

"?TMR{0}:DUTYCYCLE"

Message

"TMR{ch}:IDLESTATE=value"

Response

"TMR{ch}:IDLESTATE"

The channel number.

value

LOW, HIGH

DELAY

 Set the amount of time in mS to delay before starting the output.

 Get the amount of time in mS to delay before starting the output.

DUTYCYCLE

 Set the value in percent of the duty cycle for a specified channel.

 Get the value of the duty cycle in percent for a specified channel.

IDLESTATE

 Set the state of the timer channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – TMR

Example

"TMR{0}:IDLESTATE=HIGH"

Note

When value is High the timer output is inverted.

Message

"?TMR{ch}:IDLESTATE"

Response

"TMR{ch}:IDLESTATE=value"

The channel number.

value

LOW, HIGH

Example

"?TMR{0}:IDLESTATE"

Message

"TMR{ch}:PERIOD=value"

Response

"TMR{ch}:PERIOD"

The channel number.

value

The period in mS.

Example

"TMR{0}:PERIOD=100"

Note

The PERIOD is required for timer output operations.

Message

"?TMR{ch}:PERIOD"

Response

"TMR{ch}:PERIOD=value"

The channel number.

value

The period in mS.

Example

"?TMR{0}:PERIOD"

Message

"TMR{ch}:PULSE=value"

Response

"TMR{ch}:PULSE"

The channel number.

value

The pulse frequency in Hz.

Example

"TMR{0}:PULSE=1000"

 Get the state of the timer channel.

PERIOD

 Set the period in milliseconds (mS) of the specified timer output.

 Get the period in milliseconds (mS) of the specified timer output.

PULSE

 Set the value in Hz of the pulse frequency for a specified channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Programming messages – TMR

Message

"?TMR{ch}:PULSE"

Response

"TMR{ch}:PULSE=value"

The channel number.

value

The pulse frequency in Hz.

Example

"?TMR{0}:PULSE"

Message

"TMR{ch}:PULSECOUNT=value"

Response

"TMR{ch}:PULSECOUNT"

The channel number.

value

The number of pulses to generate. A value of 0 generates pulses continuously until the "TMR{ch}:STOP" message is sent.

Example

"TMR{0}:PULSE=100"

Message

"?TMR{ch}:PULSECOUNT"

Response

"TMR{ch}:PULSECOUNT=value"

The channel number.

value

The number of pulses to generate. A value of 0 indicates continuous pulse generation.

Example

"?TMR{0}:PULSECOUNT"

Message

"TMR{ch}:START"

Response

"TMR{ch}:START"

The channel number.

Example

"TMR{0}:START"

Message

"TMR{ch}:STOP"

Response

"TMR{ch}:STOP"

The channel number.

Example

"TMR{0}:STOP"

 Get the value in Hz of the pulse frequency for a specified channel.

PULSECOUNT

 Set the number of pulses to generate.

 Get the number of pulses to generate.

START

 Start the timer output.

STOP

 Stop the timer output.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AI

Components for retrieving device information

Description

Gets the analog input properties of a device.

AISCAN

Gets the analog input scanning properties of a device.

AITRIG

Gets the analog input triggering properties of a device.

Gets the analog output properties of a device.

AOSCAN

Gets the analog output scanning properties of a device.

CTR

Gets the counter input properties of a device.

DIO

Gets the digital I/O properties of a device.

TMR

Gets the timer output properties of a device.

Message

"@AI{ch}:CJC"

Response

"AI{ch}:CJC=implementation>value"

Channel number.

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

Channel number for the CJC associated with the specified channel, or returns NOT_SUPPORTED if the device doesn't support CJCs or the value of {ch} is not valid for the device.

Example

"AI{0}:CJC=FIXED%0"

Reflection messages

Device reflection messages get information about the capabilities of a device, such as the maximum scan rate or support for an external clock. Device reflection messages always start with the @ character.

Device features are stored on the device in EEPROM.

Click on a component below for the string messages, device responses, and property values supported by the component.

Gets the analog input properties of a device.

Properties

CJC, CHANNELS, CHMODES, FACCAL, INPUTS, MAXCOUNT, MAXRATE, RANGES, SELFCAL, SENSORS, SENSORCONFIG, TCTYPES

CJC

 Get the CJC channel number associated with an analog input channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AI

Message

"@AI:CHANNELS"

Response

implementation

FIXED%, PROG% (programmable), or not specified if value is NOT_SUPPORTED

value

The number of A/D channels on a device, or returns NOT_SUPPORTED if the device doesn't support analog input.

Example

"AI:CHANNELS=FIXED%8"

Note

On some devices, the values returned may be dependent on channel configuration settings.

Message

"@AI:CHMODES"

Response

"AI:CHMODES=implementation>value<dependent properties>"

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

SE or DIFF, or returns NOT_SUPPORTED if the device doesn't support analog input.

dependent properties

One or more property that is dependent on the value of another property. For example, the CHANNELS property is dependent on whether the CHMODES value property is set to SE or DIFF.

Example

"AI:CHMODES=PROG%SE,DIFF<CHANNELS, RANGES>"

Message

"@AI:FACCAL"

Response

"AI:FACCAL=implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

SUPPORTED, NOT_SUPPORTED

Example

"AI:FACCAL=FIXED%SUPPORTED"

CHANNELS

 Get the number of analog input channels on a device.

CHMODES

 Get the analog input channel modes that are supported by the device.

FACCAL

 Get a value indicating if the device supports factory calibration for analog inputs.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AI

Message

"@AI:INPUTS"

"@AI{ch}:INPUTS"

Response

"AI{ch}:INPUTS=implementation>value"

Channel number (if {ch} format is used).

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

VOLTS, TEMP, CUR (current), or RES (resistance), or returns NOT_SUPPORTED if the device doesn't support analog input or if the value of {ch} is not valid for the device.

Example

"AI{0}:INPUTS=PROG%VOLTS,TEMP"

Message

"@AI:MAXCOUNT"

Response

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum count of the A/D converter, or returns NOT_SUPPORTED if the device doesn't support analog input.

Example

"AI:MAXCOUNT=FIXED%65535"

Message

"@AI:MAXRATE"

Response

"AI:MAXRATE=implementation>value"

Message

"@AI:RANGES"

"@AI{ch}:RANGES"

Response

"AI{ch}:RANGES=implementation>value"

Channel number (if {ch} format is used).

implementation

FIXED%, PROG% (programmable), or HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

A list of all valid ranges for the specified channel (using the {ch} format) or device, or returns NOT_SUPPORTED if the device doesn't support analog input, or the value of {ch} is not valid for the device.

Example

"AI{0}:RANGES=PROG%BIP10V,BIP5V"

INPUTS

 Get the analog input signal types that are supported by the device or specified channel.

MAXCOUNT

 Get the maximum count of the device's A/D converter.

MAXRATE

 Get the maximum rate for software paced analog input operations.

RANGES

 Get the analog input ranges that are supported by the device.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AI

Note

On some devices, the values returned may be dependent on channel configuration settings. Some devices require the {ch} format.

Message

"@AI:SELFCAL"

Response

"AI:SELFCAL=<implementation>value"

implementation

PROG% (programmable), or not specified if value is NOT_SUPPORTED

value

SUPPORTED, NOT_SUPPORTED

Example

"AI:SELFCAL=PROG%SUPPORTED"

Message

"@AI:SENSORS"

"@AI{ch}:SENSORS"

Response

"AI{ch}:SENSORS=implementation>value"

Channel number (if {ch} format is used).

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

TC, RTD, THERM (thermistor), or SEMI (semiconductor), or returns NOT_SUPPORTED if the device doesn't support analog input sensors or the value of {ch} is not valid for the device.

Example

"AI{0}:SENSORS=FIXED%TC"

Message

"@AI{ch}:SENSORCONFIG"

Response

"AI{ch}:SENSORCONFIG=implementation>value"

Channel number.

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

2WIRE, 3WIRE, 4WIRE, FULLBRG, HALFBRG, QTRBRG, or returns NOT_SUPPORTED if the device doesn't support configuration of sensors or the value of {ch} is not valid for the device.

Example

"AI{0}:SENSORCONFIG=PROG%2WIRE,3WIRE,4WIRE"

SELFCAL

 Get a value indicating if the device supports self-calibration for analog inputs.

SENSORS

 Get the analog input sensor types that are supported by the device or specified channel.

SENSORCONFIG

 Get the analog sensor configurations that are supported by the specified channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AISCAN

Message

"@AI:TCTYPES"

"@AI{ch}:TCTYPES"

Response

"AI{ch}:TCTYPES=implementation>value"

Channel number (if {ch} format is used).

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

B, E, J, K, N, R, S, T, or returns NOT_SUPPORTED if the device doesn't support thermocouples or the value of {ch} is not valid for the device.

Example

"AI{0}:TCTYPES=PROG%B,E,J,K,N,R,S,T"

Message

"@AISCAN:EXTPACER"

Response

"AISCAN:EXTPACER=implementation>value"

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED.

value

DISABLE, ENABLE/MASTER, ENABLE/SLAVE, ENABLE/GSLAVE, or returns NOT_SUPPORTED if the device doesn't support pacing analog input externally.

Example

"AISCAN:EXTPACER=PROG%DISABLE, ENABLE/MASTER, ENABLE/SLAVE"

Message

"@AISCAN:FIFOSIZE"

Response

"AISCAN:FIFOSIZE=implementation>value"

implementation

FIXED%

value

The size, in bytes, of the device's analog input FIFO or returns NOT_SUPPORTED if the device doesn't support analog input scan.

Example

"AISCAN:FIFOSIZE=FIXED%4096"

TCTYPES

 Get the thermocouple sensor types that are supported by the device or specified channel.

AISCAN

Get the analog input scan properties of a device.

Properties

EXTPACER, FIFOSIZE, MAXBURSTRATE, MAXBURSTTHRUPUT, MAXSCANRATE, MAXSCANTHRUPUT, MINSCANRATE, MINBURSTRATE, QUEUECONFIG, QUEUELEN, QUEUESEQ, TRIG, XFRMODES, XFRSIZE

EXTPACER

 Get a value indicating which A/D pacing sources are supported by the device.

FIFOSIZE

 Get the size in bytes of the device's FIFO.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AISCAN

Message

"@AISCAN:MAXBURSTRATE"

Response

"AISCAN:MAXBURSTRATE=implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum scan rate for BURSTIO mode operations or returns NOT_SUPPORTED if the device doesn't support analog input BURSTIO operations.

Example

"AISCAN:MAXBURSTRATE=FIXED%200000"

Message

"@AISCAN:MAXBURSTTHRUPUT"

Response

"AISCAN:MAXBURSTTHRUPUT=implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum analog input throughput for BURSTIO operations, or returns NOT_SUPPORTED if the device doesn't support analog input BURSTIO operations.

Example

"AISCAN:MAXBURSTTHRUPUT=FIXED%2000"

Message

"@AISCAN:MAXSCANRATE"

Response

"AISCAN:MAXSCANRATE=implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum input scan rate, or returns NOT_SUPPORTED if the device doesn't support analog input scan.

Example

"AISCAN:MAXSCANRATE=FIXED%1000"

Message

"@AISCAN:MAXSCANTHRUPUT"

Response

"AISCAN:MAXSCANTHRUPUT=implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum throughput rate, or returns NOT_SUPPORTED if the device doesn't support analog input scan

Example

"AISCAN:MAXSCANTHRUPUT=FIXED%200000"

MAXBURSTRATE

 Get the maximum hardware-paced input scan rate for BURSTIO mode operations.

MAXBURSTTHRUPUT

 Get the maximum analog input throughput for BURSTIO mode operations.

MAXSCANRATE

 Get the maximum hardware-paced input scan rate in samples per second.

MAXSCANTHRUPUT

 Get the maximum analog input throughput in samples per second.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AISCAN

Message

"@AISCAN:MINBURSTRATE"

Response

"AISCAN:MINBURSTRATE=implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The minimum scan rate for BURSTIO mode operations, or returns NOT_SUPPORTED if the device doesn't support analog input BURSTIO operations.

Example

"AISCAN:MINBURSTRATE=FIXED%20"

Message

"@AISCAN:MINSCANRATE"

Response

"AISCAN:MINSCANRATE=implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The minimum input scan rate, or returns NOT_SUPPORTED if the device doesn't support analog input scan.

Example

"AISCAN:MINSCANRATE=FIXED%0.569"

Message

"@AISCAN:QUEUECONFIG"

Response

"AISCAN:QUEUECONFIG=<implementation>value"

implementation

PROG%, or not specified if value is NOT_SUPPORTED

value

CHAN, CHMODE, RANGE, DATARATE, or NOT_SUPPORTED.

Example

"AISCAN:QUEUECONFIG=PROG% CHAN, CHMODE, RANGE"

Message

"@AISCAN:QUEUELEN"

Response

"AISCAN:QUEUELEN=implementation>value"

implementation

FIXED%, PROG%, or not specified if value is NOT_SUPPORTED

value

The maximum number of elements that can be stored in the queue, or returns NOT_SUPPORTED if the device doesn't support an analog input queue.

Example

"AISCAN:QUEUELEN=8"

MINBURSTRATE

 Get the minimum hardware-paced input scan rate for BURSTIO mode operations.

MINSCANRATE

 Get the minimum hardware-paced input scan rate in samples per second.

QUEUECONFIG

 Get a value indicating which properties can be programmed using the AIQUEUE component.

QUEUELEN

 Get the maximum number of elements that can be stored in the analog input queue.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AISCAN

Message

"@AISCAN:QUEUESEQ"

Response

"AISCAN:PROG%QUEUESEQ=implementation>value"

implementation

FIXED%, PROG%, or not specified if value is NOT_SUPPORTED

value

The channel format capability for the channel queue. This value can be one or more of the following: ADJACENT, ASCENDING, ANYORDER, DUPLICATE, or returns NOT_SUPPORTED if the device doesn't support an analog input queue.

Example

"AISCAN: QUEUESEQ=FIXED%DUPLICATE,ANYORDER "

Note

Queue sequence format:

 ADJACENT – only adjacent channels can appear in the sequence. Example: 2,3,4.  ASCENDING – channels must appear in ascending order in the sequence.

Example: 0,3,5.

 ANYORDER – channels may appear in any order in the sequence. Example: 6,3,7,0.  DUPLICATE – a channel may appear more than once in the sequence.

Example: 0,2,2,3.

Message

"@AISCAN:TRIG"

Response

"AISCAN:TRIG=implementation>value"

implementation

PROG%, HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED.

value

ENABLE, DISABLE, or returns NOT_SUPPORTED if the device doesn't support triggering analog input externally.

Example

"AISCAN:EXTTRIG=PROG%ENABLE, DISABLE"

Message

"@AISCAN:XFRMODES"

Response

"AISCAN:XFRMODES=implementation>value"

implementation

FIXED%, PROG% (programmable), or not specified if value is NOT_SUPPORTED.

value

BLOCKIO, SINGLEIO, BURSTAD, BURSTIO, or returns NOT_SUPPORTED if the device doesn't support transfer modes.

Example

"AISCAN:XFRMODES=PROG%BLOCKIO,SINGLEIO,BURSTIO"

QUEUESEQ

 Get the channel sequence format of the analog input channel queue.

TRIG

 Get a value indicating whether the device supports external triggering of analog input channels.

XFRMODES

 Get the input transfer modes supported by a device.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AITRIG

Message

"@AISCAN:XFRSIZE"

Response

"AISCAN:XFRSIZE=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The number of bytes, or NOT_SUPPORTED

Example

"AISCAN:XFRSIZE=FIXED%2"

Message

"@AITRIG:RANGES"

Response

"AITRIG:RANGES=implementation>value"

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

A list of all valid ranges for the specified analog trigger source or device, or returns NOT_SUPPORTED if the device doesn't support analog triggering of analog input or the trigger source is not valid for the device.

Example

"AITRIG:RANGES=PROG%BIP10V,BIP5V"

Note

On some devices, the values returned may be dependent on channel configuration settings.

Message

"@AITRIG:REARM"

Response

"AITRIG:REARM=implementation>value"

implementation

FIXED%, PROG%, or not specified if value is NOT_SUPPORTED

value

ENABLE, DISABLE, or returns NOT_SUPPORTED if the device doesn't support continuous triggering of analog input.

Example

"AITRIG:REARM=PROG%ENABLE,DISABLE"

XFRSIZE

 Get the number of bytes used in the transfer of each data sample.

AITRIG

Get the analog input trigger properties of a device.

Properties

RANGES, REARM, SRCS, TYPES

RANGES

 Get the supported ranges for a device's analog input trigger circuit.

REARM

 Get a value indicating whether the device supports continuous triggering of the analog input.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AO

Message

"@AITRIG:SRCS"

Response

"AITRIG:SRCS=implementation>value"

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

HW/DIG, HW/ANLG, or returns NOT_SUPPORTED if the device doesn't support triggering analog input scans.

Example

"AITRIG:SRCS=PROG%HW/DIG,HW/ANLG"

Message

"@AITRIG:TYPES"

Response

"AITRIG:TYPES=implementation>value"

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

<type>/<condition> or returns NOT_SUPPORTED if the device doesn't support triggering analog input scans.

type

EDGE, LEVEL

condition

RISING, FALLING, if type is EDGE. HIGH, LOW if type is LEVEL.

Example

"AITRIG:TYPES=PROG%EDGE/RISING,EDGE/FALLING"

Message

"@AO:CHANNELS"

Response

"AO:CHANNELS=<implementation>value"

implementation

FIXED%, PROG%, or not specified if value is NOT_SUPPORTED

value

The number of D/A channels on a device, or returns NOT_SUPPORTED if the device doesn’t support analog output.

Example

"AO:CHANNELS=FIXED%4"

SRCS

 Set the edge trigger type.

TYPES

 Get the types of trigger sensing that are supported by the device.

Gets the analog output properties of a device.

Properties

CHANNELS, FACCAL, MAXCOUNT, MAXRATE, OUTPUTS, RANGES, SELFCAL

CHANNELS

 Get the number of analog output channels on a device.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AO

Message

"@AO:FACCAL"

Response

"AO:FACCAL=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

NOT_SUPPORTED or SUPPORTED

Example

"AO:FACCAL=FIXED%SUPPORTED"

Message

"@AO:MAXCOUNT"

Response

"AO:MAXCOUNT=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum count of the D/A converter or returns NOT_SUPPORTED if the device doesn’t support analog output.

Example

"AO:MAXCOUNT=FIXED%65535"

Message

"@AO:MAXRATE"

Response

"AO:MAXRATE=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum output rate of the device, or returns NOT_SUPPORTED if the device doesn’t support analog output.

Example

"AO:MAXRATE=FIXED%100"

Note

The maximum rate is based on the device's ability to perform single-point I/O.

Message

"@AO:OUTPUTS"

"@AO{ch}:OUTPUTS"

Response

"AO{ch}:OUTPUTS=<implementation>value"

Channel number (if {ch} format is used).

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

VOLTS, CUR, or returns NOT_SUPPORTED if the device doesn’t support analog output or the value of {ch} is not valid for the device.

FACCAL

 Get a value indicating if the device supports factory calibration for analog outputs.

MAXCOUNT

 Get the maximum count of the device's D/A converter.

MAXRATE

 Get the maximum rate for software paced analog output operations.

OUTPUTS

 Get the analog output signal types that are supported by the device or specified channel.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AOSCAN

Example

"AO{0}:OUTPUTS=PROG%VOLTS,CUR"

Message

"@AO:RANGES"

"@AO{ch}:RANGES"

Response

" AO{ch}: RANGES=<implementation>value "

implementation

FIXED%, PROG%, or not specified if value is NOT_SUPPORTED

value

The AO ranges supported by a device, or returns

NOT_SUPPORTED if the device doesn’t support analog output or the value of {ch} isn’t valid for the device.

Example

" AO:RANGES=FIXED%BIP10V"

Message

"@AO:SELFCAL"

Response

"AO:SELFCAL=<implementation>value"

implementation

PROG% (programmable), or not specified if value is NOT_SUPPORTED

value

SUPPORTED, NOT_SUPPORTED

Example

"AO:SELFCAL=PROG%SUPPORTED"

Message

"@AOSCAN:ADCLKTRIG"

Response

"AOSCAN:ADCLKTRIG=<implementation>value"

implementation

FIXED%, PROG% (programmable), or not specified if value is NOT_SUPPORTED

value

ENABLE , DISABLE or returns NOT_SUPPORTED if the device doesn’t support pacing analog output scan from the A/D pacer.

Example

"AOSCAN:ADCLKTRIG=PROG%ENABLE, DISABLE"

RANGES

 Get the analog output ranges supported by a device.

SELFCAL

 Get a value indicating if the device supports self-calibration for analog outputs.

AOSCAN

Gets the analog output scan properties of a device.

Properties

ADCLKTRIG, EXTPACER, FIFOSIZE, MAXSCANRATE, MAXSCANTHRUPUT, MINSCANRATE, SIMUL, TRIG, XFRSIZE

ADCLKTRIG

 Get a value indicating whether analog output channels can be triggered by the device's A/D clock.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AOSCAN

Message

"@AOSCAN:EXTPACER"

Response

"AOSCAN: EXTPACER=<implementation>value"

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED

value

DISABLE, ENABLE/MASTER, ENABLE/SLAVE, ENABLE/GSLAVE or

returns NOT_SUPPORTED if the device doesn’t support pacing

analog input externally.

Example

"AOSCAN: EXTPACER=PROG%ENABLE/MASTER"

Message

"@AOSCAN:FIFOSIZE"

Response

"AOSCAN: FIFOSIZE=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The size, in bytes, of the device's analog output FIFO, or returns NOT_SUPPORTED if the device doesn’t support buffering of the analog output.

Example

"AOSCAN:FIFOSIZE=FIXED%4096"

Message

"@AOSCAN:MAXSCANRATE"

Response

"AOSCAN:MAXSCANRATE=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum output scan rate, or returns NOT_SUPPORTED if the device doesn’t support analog output scan.

Example

"AOSCAN:MAXSCANRATE=FIXED%1000"

Message

"@AOSCAN:MAXSCANTHRUPUT"

Response

"AOSCAN: MAXSCANTHRUPUT=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum throughput rate, or returns NOT_SUPPORTED if the device doesn’t support analog output scan.

Example

"AOSCAN: MAXSCANTHRUPUT=FIXED%200000"

EXTPACER

 Get a value indicating which D/A pacing sources are supported by the device.

FIFOSIZE

 Get the size in bytes of the device's analog output FIFO.

MAXSCANRATE

 Get the maximum hardware-paced output scan rate in samples per second.

MAXSCANTHRUPUT

 Get the maximum analog output throughput in samples per second.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – AOSCAN

Message

"@AOSCAN:MINSCANRATE"

Response

"AOSCAN:MINSCANRATE=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The minimum output scan rate, or returns NOT_SUPPORTED if the device doesn’t support analog output scan.

Example

"AOSCAN:MINSCANRATE=FIXED%1"

Message

"@AOSCAN:SIMUL"

Response

"AOSCAN:SIMUL=<implementation>value"

implementation

FIXED%, PROG% (programmable), or not specified if value is NOT_SUPPORTED

value

PROG%ENABLE , DISABLE or returns NOT_SUPPORTED if the device doesn’t support simultaneous update of the analog output.

Example

"AOSCAN:SIMUL=PROG%ENABLE, DISABLE"

Message

"@AOSCAN: TRIG"

Response

"AOSCAN: TRIG=<implementation>value"

implementation

FIXED%, PROG% (programmable), or not specified if value is NOT_SUPPORTED

value

ENABLE, DISABLE, or returns NOT_SUPPORTED if the device doesn’t support triggering analog output scan.

Example

"AOSCAN: TRIG=PROG%ENABLE,DISABLE"

Message

"@AOSCAN:XFRSIZE"

Response

" AOSCAN:XFRSIZE=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The number of bytes, or NOT_SUPPORTED

Example

" AOSCAN:XFRSIZE=FIXED%2"

MINSCANRATE

 Get the minimum hardware-paced output scan rate in samples per second.

SIMUL

 Get a value indicating whether analog output channels can be updated simultaneously.

TRIG

 Get a value indicating whether analog output channels can be externally triggered.

XFRSIZE

 Get the number of bytes used in the transfer of each data sample.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – CTR

Message

"@CTR:CHANNELS"

Respons e

"CTR:CHANNELS=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

Value

The number of counter channels on a device, or returns NOT_SUPPORTED if the device has no counters.

Example

"CTR:CHANNELS=FIXED%3"

Message

"@CTR{ch}:EDGE"

Response

"CTR{ch}:EDGE=<implementation><value>"

The counter number.

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable) , or not specified if value is NOT_SUPPORTED.

value

RISING, FALLING, or returns NOT_SUPPORTED if the device has no counters.

Example

"CTR{0}:EDGE=PROG%RISING,FALLING"

Message

"@CTR{ch}:LDMAX"

Response

"CTR{ch}:LDMAX=<implementation>value"

The number of the counter channel.

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum count that can be used for the VALUE property, or NOT_SUPPORTED.

Example

"CTR{0}:LDMAX=FIXED%65535"

CTR

Gets the counter channel properties of a device.

Properties

CHANNELS, EDGE, LDMAX, LDMIN, MAXCOUNT, TYPE

CHANNELS

 Get the number of counter channels on a device.

EDGE

 Get a value indicating whether a counter's edge detection is programmable.

LDMAX

 Get the maximum count value that can be set using the "CTR{ch}:VALUE=" message.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – CTR

Message

"@CTR{ch}:LDMIN"

Response

"CTR{ch}:LDMIN=<implementation>value"

The number of the counter channel.

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The minimum count that can be used for the VALUE property, or NOT_SUPPORTED.

Example

"CTR{0}:LDMIN=FIXED%0"

Message

"@CTR{ch}:MAXCOUNT"

Response

"CTR{ch}:MAXCOUNT=<implementation>value"

The number of the counter channel.

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

The maximum count of the counter, or returns NOT_SUPPORTED if the device has no counters.

Example

"CTR{0}:MAXCOUNT=FIXED%65535"

Message

"@CTR{ch}:TYPE"

Response

"CTR{ch}:TYPE=<implementation>value"

The counter number.

implementation

FIXED%, or not specified if value is NOT_SUPPORTED

value

8254, 9513, EVENT, or returns NOT_SUPPORTED if the device has no counters.

Example

"CTR{0}:TYPE=FIXED%EVENT"

LDMIN

 Get the minimum count value that can be set using the "CTR{ch}:VALUE=" message.

MAXCOUNT

 Get the maximum count of the specified counter.

TYPE

 Get the counter type.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – DIO

Message

"@DIO:CHANNELS"

Response

"DIO:CHANNELS=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED.

value

The number of digital channels (ports) on a device, or returns NOT_SUPPORTED if the device has no digital channels.

Example

"DIO:CHANNELS=FIXED%3"

Message

"@DIO{ch}:CONFIG"

Response

"DIO{ch}:CONFIG=<implementation>value"

The digital port number.

implementation

PROG% (programmable), AUTO%, or not specified if value is NOT_SUPPORTED.

value

BITIN, BITOUT, PORTIN, PORTOUT, or returns NOT_SUPPORTED if the device has no digital channels.

Example

"DIO{0}: CONFIG= AUTO%BITIN,BITOUT,PORTIN,PORTOUT"

Message

"@DIO{ch}:LATCH"

Response

"DIO{ch}:LATCH=<implementation>value"

The digital port number.

implementation

PROG% (programmable), or not specified if value is NOT_SUPPORTED.

value

READ, WRITE, or returns NOT_SUPPORTED if the device has no digital channels.

Example

"DIO{0}:LATCH=PROG%READ,WRITE"

DIO

Gets the digital I/O properties of a device.

Properties

CHANNELS, CONFIG, LATCH, MAXCOUNT

CHANNELS

 Get the number of digital channels (ports) on a device.

CONFIG

 Get the options supported by a specified port in which no configuration is required.

LATCH

 Get a value indicating whether the latch associated with a specified port has read and/or write

access.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – TMR

Message

"@DIO{ch}:MAXCOUNT"

Response

"DIO{ch}:MAXCOUNT=<implementation>value"

The digital port number.

implementation

FIXED%, or not specified if value is NOT_SUPPORTED.

value

The maximum count of the digital port, or returns NOT_SUPPORTED if the device has no digital channels.

Example

"DIO{0}:MAXCOUNT=FIXED%65535"

Message

"@TMR{ch}:BASEFREQ"

Response

"TMR{ch}:BASEFREQ=<implementation>value"

The number of the timer channel.

implementation

FIXED%, or not specified if value is NOT_SUPPORTED.

value

The internal clock's base frequency, or returns NOT_SUPPORTED if the device has no timer channels.

Example

"TMR{0}:BASEFREQ=FIXED%64000000

Message

"@TMR:CHANNELS"

Response

"TMR:CHANNELS=<implementation>value"

implementation

FIXED%, or not specified if value is NOT_SUPPORTED.

value

The number of timer output channels, or returns NOT_SUPPORTED if the device has no timer outputs.

Example

"TMR:CHANNELS=FIXED%2"

MAXCOUNT

 Get the maximum count of the specified port.

TMR

Gets the timer output properties of a device.

Refer to the device-specific information in the Hardware Reference section for the component properties and commands supported by each DAQ device.

Properties

BASEFREQ, CHANNELS, CLKSRC, DELAY, DUTYCYCLE, MAXCOUNT, TYPE

BASEFREQ

 Get the specified timer's internal base frequency in Hertz.

CHANNELS

 Get the number of timer output channels on a device.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – TMR

Message

"@TMR{ch}:CLKSRC"

Response

"TMR:CLKSRC=<implementation>value"

The number of the timer channel, or returns NOT_SUPPORTED if the device has no timer channels.

implementation

FIXED%, PROG% (programmable), HWSEL% (hardware selectable), or not specified if value is NOT_SUPPORTED.

value

INT, EXT, or returns NOT_SUPPORTED if the device has no timer channels.

Example

"TMR{0}:CLKSRC=PROG%INT,EXT"

Message

"@TMR{ch}:DELAY"

Response

"TMR{ch}:DELAY=<implementation>value"

The number of the timer channel.

implementation

PROG% (programmable), or not specified if value is NOT_SUPPORTED.

value

PULSES, or returns NOT_SUPPORTED if the device has no timer channels.

Example

"TMR{0}:DELAY=PROG%PULSES"

Message

"@TMR{ch}:DUTYCYCLE"

Response

"TMR{ch}:DUTYCYCLE=<implementation>value"

The number of the timer channel.

implementation

PROG% (programmable), or not specified if value is NOT_SUPPORTED.

value

PRCNTHIGH, PRCNTLOW, or returns NOT_SUPPORTED if the device has no timer channels.

Example

"TMR{0}:DUTYCYCLE=PROG%PRCNTHIGH"

CLKSRC

 Get the clock source for the specified timer channel.

DELAY

 Get a value indicating how the specified timer's delay option is implemented.

DUTYCYCLE

 Get a value indicating how the duty cycle is supported for the specified counter.

DAQFlex Software User's Guide DAQFlex Message Reference – Reflection messages – TMR

Message

"@TMR{ch}:MAXCOUNT"

Response

"TMR{ch}:MAXCOUNT=<implementation>value"

The number of the timer channel.

implementation

FIXED%, or not specified if value is NOT_SUPPORTED.

value

The maximum count of the timer, or returns NOT_SUPPORTED if the device has no timer channels.

Example

"TMR{0}:MAXCOUNT=FIXED%4294967295"

Message

"@TMR{ch}:TYPE"

Response

"TMR{ch}:TYPE=<implementation>value"

The number of the timer channel.

implementation

FIXED%, or not specified if value is NOT_SUPPORTED.

value

PULSE, NOT_SUPPORTED

Example

"TMR{0}:TYPE=FIXRD%PULSE"

MAXCOUNT

 Get the maximum count for the specified timer channel.

TYPE

 Get the type of timer for the specified timer channel.

Chapter 5

FlexTest Utility

FlexTest is an interactive GUI-based test utility that demonstrates how to communicate with a device using the DAQFlex communication protocol and software.

This utility automatically recognizes an available DAQFlex device, shows all commands available for this device, and allows users to interact with the device one command at a time. During this interaction, the commands are captured in a log, allowing the user to cut and paste them directly into a program.

FlexTest is included on the driver CD, and is installed to the following location:  Windows 8, Windows 7, and Windows Vista — C:\Users\Public Documents\Measurement

Computing\DAQFlex For Windows\FlexTest.exe.

 Windows XP, FlexTest — C:\Program Files\Measurement Computing\DAQFlex For

Windows\FlexTest.exe.

 Windows CE — C:/Program Files/Measurement Computing/DAQFlex For Windows

CE/FlexTest.exe.

 MAC OS X — FlexTest is installed to the /Applications folder.  Linux — FlexTest is extracted to the directory in which the compressed files were extracted.

To run FlexTest on Linux, do the following:

o In a terminal window, set the current directory to DAQFlex/Source/DAQFlexTest. o As a root user, run the commands $ make and $ make install. o From a terminal window, run the FlexTest application using the command $ flextest

Note: Connect a device that supports the DAQFlex protocol before running FlexTest.

When you run FlexTest, the main FlexTest window and a MessageLog window open:

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.

DAQFlex Software User's Guide FlexTest Utility

o Select AISCAN:RANGE=*. Highlight the asterisk and enter "BIP10V", then click Send Message.

This field is not case-sensitive.

o Select AISCAN:RATE=*. Highlight the asterisk and enter "1000", then click Send Message. o Select AISCAN:SAMPLES=*. Highlight the asterisk and enter "512", then click Send Message.

4. Start the scan operation: Select AISCAN:START and click Send Message.

The FlexTest window displays the scan data in the Response area, and the MessageLog window lists the messages sent to the device.

Notes

 String data entered into the Message field is not case sensitive.  Messages that begin with "?" are query messages. Select a query to read a value.

Calibrate a device

For devices that support self-calibration, FlexText displays a Calibrate button on the AI tab to calibrate

analog inputs. For devices with analog outputs FlexText displays a Calibrate button on the AO tab.

Calibrating analog inputs

To calibrate a device's analog inputs, do the following:

1. Select the AI tab.

2. Click the Calibrate button.

DAQFlex Software User's Guide FlexTest Utility

The Ai Self Calibration window opens.

3. Click the Start button to start calibrating the analog inputs.

The progress bar updates as the operation progresses. When calibration is done the window

displays Complete.

4. Click OK to close the window.

Calibrating analog outputs

To calibrate a device's analog outputs, do the following:

1. Select the AO tab.

2. Click the Calibrate button.

The Ao Self Calibration window opens.

3. Click the Start button to start calibrating the analog outputs.

The progress bar updates as the operation progresses. When calibration is done the window

displays Complete.

4. Click OK to close the window.

DAQFlex message reference

Refer to the DAQFlex Message Reference chapter on page 31 for the supported DAQFlex API messages.

Note: FlexTest cannot be run at the same time as the DAQFlex Firmware Loader utility (DAQFlexFWLoader.exe).

Chapter 6

C# and VB Example Programs

Complete C# and VB example programs are installed with DAQFlex that demonstrate how to configure DAQFlex-supported devices and perform DAQ operations with the DAQFlex Software API.

Default installation path

 On Windows, the example programs are installed by default to CSharp and VB subfolders:

o Windows 8, Windows 7, and Windows Vista — C:\Users\Public Documents\Measurement

Computing\DAQFlex For Windows\Examples.

o Windows XP — C:\Program Files\Measurement Computing\DAQFlex For

Windows\Examples.

o Windows CE — C:\Program Files\Measurement Computing\DAQFlex For Windows

CE\Examples.

 On Mac OS X, example programs are installed to Users/Shared/Measurement

Computing/DAQFlex/Examples.

 On Linux, C# example programs are extracted to DAQFlex/Examples/CSharp.

Building the DAQFlex example programs

Windows 8/7/Vista/XP

Complete the following steps to run the DAQFlex example programs:

1. Go to Measurement Computing»DAQFlex»Examples»ExampleBuilder.

2. Run the ExampleBuilder script to build all CSharp and Visual Basic examples.

3. Go to Measurement Computing»DAQFlex»Examples»Go To Examples.

The example program directory opens. The example programs are installed by default to CSharp and VB subfolders.

4. Double-click on a *.csproj or *.vbproj file to run the DAQFlex example program.

Windows CE

Complete the following steps to run the DAQFlex example programs:

1. Go to Measurement Computing»DAQFlex for Windows CE»Examples»Go to Examples.

The example program directory opens. The example programs are installed by default to CSharp and VB subfolders.

2. Double-click on a *.csproj or *.vbproj file to run the DAQFlex example program.

Mac OS X

Complete the following steps to run the DAQFlex example programs:

1. Go to Users/Shared/Measurement Computing/DAQFlex/Examples.

2. Run the ExampleBuilder script to build all CSharp and Visual Basic examples.

3. From a terminal window, go to either CSharp/<application name>/bin/Debug or

VB/<application name>/bin/Debug, and run the following command:

o mono <application name>.exe

Linux

You run the DAQFlex C# example programs using MonoDevelop or the Mono command line interpreter. Do the following:

1. In a terminal window, set the current directory to DAQFlex/Examples.

2. Run the following commands as a root user:

o make o make install

3. Exit the root user shell.

DAQFlex Software User's Guide C# and VB Example Programs

4. From a terminal window, run the example programs as a non-root user by entering the application

name as a command, for example:

o ainscan

Refer to the readme.txt file for additional information about running the DAQFlex example programs.

Chapter 7

Hardware Reference

Select your DAQFlex-supported device below for the components and programming messages supported by the device.

Note: You can use any of the device reflection messages to retrieve information about the device's

capabilities.

 USB-200 Series  USB-1208FS-Plus  USB-1408FS-Plus  USB-1608FS-Plus  USB-1608G Series  USB-2001-TC  USB-2408 Series  USB-7202  USB-7204

DAQFlex Software User's Guide Hardware Reference – USB-200 Series

Component

Supported Property/Command

Set/Get

Supported Values

Get 8 CAL

Set/Get

ENABLE, DISABLE

CHMODE

Get

RANGE

Get

BIP10V

RES

Get

U12

SCALE

Set/Get

ENABLE, DISABLE

AI{ch}

OFFSET

Get

4-byte floating point numeric

RANGE

Get

BIP10V

SLOPE

Get

4-byte floating point numeric

VALUE

Get

Unsigned integer numeric

VALUE/{format}

Get

RAW, VOLTS

AIQUEUE

CLEAR

Set COUNT

Get

0 to 7 elements

AIQUEUE{element}

CHAN

Set/Get

element: 0 to 7 value: 0 to 7

CHMODE

Get

element: 0 to 7 value: SE

RANGE

Get

element: 0 to 7 value: BIP10V

AISCAN

BUFOVERWRITE

Set/Get

ENABLE, DISABLE

BUFSIZE

Set/Get

EXTPACER

Set/Get

ENABLE, DISABLE

HIGHCHAN

Set/Get

0 to 7

INDEX

Get LOWCHAN

Set/Get

0 to 7

QUEUE

Set/Get

ENABLE, DISABLE

RANGE

Get

BIP10V

RANGE{ch}

Get

channel: 0 to 7 value: BIP10V

RATE

Set/Get

USB-204/USB-204-OEM and USB-205/ USB-205-OEM: 500,000 Hz

USB-201/USB-201-OEM and USB-202/USB-202-OEM: 100,000 Hz

USB-200 Series

The USB-200 Series includes the following devices:

 USB-201, USB-201-OEM  USB-202, USB-202-OEM  USB-204, USB-204-OEM  USB-205, USB-205-OEM

Use the components below to set or get device properties.

DAQFlex Software User's Guide Hardware Reference – USB-200 Series

Component

Supported Property/Command

Set/Get

Supported Values

SAMPLES

Set/Get

0 to N (0 = continuous scan; N = 32-bit FIFO)

SCALE

Set/Get

ENABLE, DISABLE

START

Set STATUS

Get

IDLE, RUNNING, OVERRUN

STOP

Set TRIG

Set/Get

ENABLE, DISABLE

XFRMODE

Set/Get

BLOCKIO, SINGLEIO

AITRIG

SRC

Set/Get

HWSTART/DIG

Type

Set/Get

EDGE/RISING, EDGE/FALLING LEVEL/HIGH, LEVEL/LOW

AO1

Get 2 RES

Get

U12 (unsigned 12-bit integer)

SCALE

Set/Get

ENABLE, DISABLE

AO{ch}1

RANGE

Get

UNI5V

VALUE

Set

0 to 4,095 0 to 4.99838 when SCALE is enabled

CTR

Get

CTR{ch}

START

Set STOP

Set

VALUE

Get

0 to 4,294,967,295

Set

0 (resets the counter to 0)

DEV

FLASHLED/{n}

Set

0 to 255

FWV

Get

MM.mm (M = major; m = minor)

Set/Get

Up to 56 characters

MFGCAL

Get

yyyy-mm-dd HH:MM:SS

MFGCAL{item}

Get

YEAR as yyyy; 20xx MONTH as mm; 01 to 12 DAY as dd; 01 to 31 HOUR as HH; 01 to 23 MINUTE as MM; 01 to 59 SECOND as SS; 01 to 59

MFGSER

Get

Up to 8 hexadecimal digits

RESET/{value}

Set

DEFAULT

DIO

Get

DIO{port}

Get 8 DIR

Set/Get

IN, OUT

LATCH

Set/Get

0 to 255

VALUE

Set/Get

0 to 255

100

Measurement DAQFlex User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

About this User's Guide

What you will learn from this user's guide

Conventions in this user's guide

Where to find more information

Introducing DAQFlex Software

Platform support

Hardware requirements

Installing the DAQFlex software library

Windows 8, Windows 7, Windows Vista, and Windows XP

Windows CE

Mac OS X

Linux

Using DAQFlex Software

Reading and writing software-paced I/O

Reading an analog input channel

Writing to an analog output channel

Reading a digital bit

Writing to a digital bit

Reading a digital port

Writing to a digital port

Reading a counter input channel

Reading hardware-paced I/O

ReadScanData() parameters

Internal buffer

CallbackType

Writing hardware-paced I/O

WriteScanData() parameters

Internal buffer

DAQFlex Software Reference

DaqDeviceManager class

DaqDeviceManager.GetDeviceNames()

DaqDeviceManager.CreateDevice()

DaqDeviceManager.ReleaseDevice()

DaqDevice class

DaqDevice.SendMessage()

DaqDevice.ReadScanData()

DaqDevice.WriteScanData()

DaqDevice.EnableCallback()

InputScanCallback Delegate

DaqDevice.DisableCallback()

DaqDevice.GetErrorMessage()

DaqDevice.GetSupportedMessages()

DAQFlex Message Reference

DAQFlex components

Programming messages

ADCAL

CHMODE

DATARATE

OFFSET

RANGE

SCALE

SENSOR

value

SLOPE

STATUS

VALIDCHANS

Working with the CAL and SCALE properties

AICAL

START

STATUS

AIQUEUE

CHAN

CHMODE

CLEAR

COUNT

DATARATE

RANGE

RESET

AISCAN

BUFOVERWRITE

BUFSIZE

BURSTMODE

COUNT

EXTPACER

HIGHCHAN