Справочник Пользователя для National Instruments NI-DNET
Chapter 1
NI-DNET Software Overview
1-4
ni.com
NI-Spy
This tool monitors function calls to the NI-DNET APIs. This tool helps in
debugging programming problems in your application. To launch this tool,
open the Software branch of the MAX Configuration tree, right-click
NI Spy, and select Launch NI Spy.
debugging programming problems in your application. To launch this tool,
open the Software branch of the MAX Configuration tree, right-click
NI Spy, and select Launch NI Spy.
SimpleWho
To provide valid parameters for the NI-DNET open functions
(
(
ncOpenDnetIntf
,
ncOpenDnetExplMsg
, and
ncDnetOpenIO
), you
need to determine some basic information about your DeviceNet devices.
This information includes the MAC ID of each device, the I/O connections
it supports, and the input/output lengths for those I/O connections.
This information includes the MAC ID of each device, the I/O connections
it supports, and the input/output lengths for those I/O connections.
In most cases, the vendor of each DeviceNet device provides this
information, but if not, NI-DNET provides a tool that helps you determine
this information. Searching a DeviceNet network to determine information
about connected devices is often referred to as a network who, and thus the
NI-DNET tool is called SimpleWho. This tool is not a complete network
management or configuration tool. It provides read-only information about
the DeviceNet devices connected to your National Instruments DeviceNet
interface.
information, but if not, NI-DNET provides a tool that helps you determine
this information. Searching a DeviceNet network to determine information
about connected devices is often referred to as a network who, and thus the
NI-DNET tool is called SimpleWho. This tool is not a complete network
management or configuration tool. It provides read-only information about
the DeviceNet devices connected to your National Instruments DeviceNet
interface.
To launch SimpleWho, right-click the DeviceNet interface (such as
DNET0) in MAX, and select SimpleWho.
DNET0) in MAX, and select SimpleWho.
For more information on the SimpleWho tool, refer to the NI-DNET help
file in MAX. This help file can be opened using the Help button in the
SimpleWho tool itself.
file in MAX. This help file can be opened using the Help button in the
SimpleWho tool itself.
NI-DNET Objects
The NI-DNET software, like the DeviceNet Specification, uses
object-oriented concepts to represent components in the DeviceNet system
(for more information about object-oriented concepts in the DeviceNet
Specification, refer to Appendix A,
object-oriented concepts to represent components in the DeviceNet system
(for more information about object-oriented concepts in the DeviceNet
Specification, refer to Appendix A,
). However,
whereas in the DeviceNet Specification objects represent a multitude of
components in DeviceNet devices, NI-DNET objects represent
components of the Windows device driver software. The NI-DNET device
driver objects do not correspond directly to objects contained in remote
devices. To facilitate access to the DeviceNet network, the NI-DNET
objects provide a more concise representation of various objects defined in
the DeviceNet Specification.
components in DeviceNet devices, NI-DNET objects represent
components of the Windows device driver software. The NI-DNET device
driver objects do not correspond directly to objects contained in remote
devices. To facilitate access to the DeviceNet network, the NI-DNET
objects provide a more concise representation of various objects defined in
the DeviceNet Specification.