Rockwell Automation 1395 ControlNet Communication Board - Manual (Page 73)

Chapter
8
Publication 1395.5.37 – March, 1999
Reference
Chapter Objective This chapter provides you with an easy reference to the CNA board
parameters. It includes a condensed table of all configuration and
setup parameters and a complete description of each CNA board
parameter.
Terminology A brief description of terms and concepts covered in this chapter are:
Configuration The process of linking sink to source parameters
for the purpose of distributing data within the
Drive or adapter(s).
Drive Units The actual value of the parameter as it is stored
internally in the Drive. Drive units are converted
to engineering units or to hexidecimal by
Allen-Bradley program terminals. All Drive units
are stored using per unit numbering.
Engineering Unit A label given to parameter data which specifies
what units are used to display the parameter on
programming terminals. Examples of engineering
units include: RPM, Amps, %, etc.
Fast Parameter Fast parameters are those which are updated
rapidly. They are typically used for transmitting
real time data to and from the Drive. Fast
parameter values are not stored in non-volatile
memory. Actual armature Current is an example of
a fast parameter.
Microbus An internal Drive mechanism designed by
Allen-Bradley for exchanging information
between microprocessors. The Microbus is used
to transfer information between the CNA board
and the Main Control board.
Port A physical location on the Drive reserved for the
connection of Adapter cards. Each Drive has two
ports. The ports are identified in firmware as “Port
A” and “Port B”.
Parameter A memory location in Drive firmware used to
store Drive data. This data can be real time data
and/or Drive setup information. Each parameter
has an assigned number and function. Parameters
are displayed in engineering units when viewed
from program terminals.
Parameter Table A table which contains all parameters that are
available in the Drive.