Rockwell Automation 20-COMM-L LonWorks Adapter - Manual (Page 33)

20-COMM-L LonWorks Adapter User Manual
Publication 20COMM-UM008B-EN-P
Chapter 4
Configuring the LonWorks Network
This chapter provides information about configuring network variables to
access a PowerFlex 7-Class drive over a LonWorks network.
Overview of LonWorks
Functionality
A network variable is a data item that a particular device application
program expects to get from other devices on a network (an ‘input network
variable’) or expects to make available to other devices on a network (an
‘output network variable’). Data exchange on a LonWorks network is
handled with Standard Network Variable Types (SNVTs), which represent
different types of standard data (for example, temperature, pressure, and
voltage).
When a program writes into one of its output network variables, the new
value of the network variable is propagated across the network to all nodes
with input network variable connected to that output network variable. A
network variable can only be bound to another network variable of the same
type.
Specific network variables are described in sections Network Variable
Inputs (NVIs) , Network Variable Outputs (NVOs) , and Network
Configuration Inputs (NCIs) .
Important: Any changes made with the LCD HIM to a parameter that is
also updated by the network will be overwritten when the next
network update occurs.
Topic Page
Overview of LonWorks Functionality 4-1
Operating the Drive Using a LonMark Profile 4-2
Node Operations 4-4
Network Variable Inputs (NVIs) 4-5
Network Variable Outputs (NVOs) 4-9
Network Configuration Inputs (NCIs) 4-13
Conditions Required for Operation 4-18
Resource Files 4-19