Rockwell Automation 1395 Multi-Comm Hardware/Software - Manual (Page 96)

8 Chapter
8–1
Reference
Chapter Objective
This chapter provides you with an easy reference to the MCA board
parameters. It includes a condensed table of all configuration and setup
parameters and a complete description of each MCA board parameter.
Terminology
A brief description of terms and concepts covered in this chapter are:
Channel Refers to a serial communication link. The MCA
board contains two “channels”, each of which can be
assigned as either Allen–Bradley RIO or DH+ type
communications.
Configuration The process of linking sink to source parameters for
the purpose 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 MCA 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”.