Product And Environment; Network; User Profile; Interface To Devicenet Network - Danfoss VLT 2800 Manual

I Product and Environment
DeviceNet is a distributed control network. The
DeviceNet protocol is embedded in the control card
and is a communication protocol conforming to the
Open DeviceNet Vendor Association (ODVA) standard.
The control card allows DeviceNet compatible
controllers, sensors, and network management
tools to control, monitor, and supervise the
VLT frequency converter. The control card is
designed to the DeviceNet System Protocol for
Vendors as a slave device.
I Network
The VLT frequency converter will function as a slave
on the DeviceNet network. All addressing and linking
to nodes is done at installation time by a network
manager tool. The network installer and the network
management master have a significant influence on
how the node functions on the network. A DeviceNet
network can support up to 64 nodes.
I User Profile
The end-user is a network manager programmer
or a controller who see the DeviceNet control
card as a transparent bridge to the VLT frequency
converter. Control and supervision of the VLT
frequency converter will still be possible through
the standard parameter set.
I Interface to DeviceNet Network
The Interface connection to the DeviceNet network is
implemented through a CAN chip. Four different I/O
Assembly is available in the VLT frequency converter
DeviceNet interface, which can be configured by
the user. The I/O assembly can handle Polled
mode, Bit Strobe, Change of state (COS) and
Cyclic. For explicit messages, the interface has two
Unconnected Messages Manager (UCMM) available.
This allows two nodes on the DeviceNet to directly
access parameters in the VLT frequency converter
without involving a pre-configured master.
I Data Communication Interface
No direct data communication interface (e.g. via a
serial port) other than the DeviceNet interface and the
VLT frequency converter interface is considered.
MG.90.B2.02 - VLT is a registered Danfoss trade mark
®
VLT 2800 / FCD 300 DeviceNet
LCP2 or Dialog can be used on the Sub D
plug while using DeviceNet.
I Overall Function
DeviceNet is a low-level network that standardizes
communications between industrial devices (sensors,
limit switches) and high level devices (controllers).
The communication network can be peer to peer or
master/slave. DeviceNet uses CAN technology for
Media Access Control and Physical Signaling and it
supports up to 64 nodes. DeviceNet also defines
device profiles for devices belonging to specific
classes. For other devices, a custom class must be
defined in order to make it DeviceNet compatible.
This further enhances the interchangeability and
interoperability of the network. Each node on the
network has its own unique media access control
identifier (MAC ID) to distinguish it on the network.
I Control Card Self-test
Please refer to parameter 620 in the
Programming chapter.
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