Rockwell Automation 1336T ControlNet Frn1.02 Rev 1.5 - Manual (Page 11)

Preface P–4
Publication 1336 FORCE–5.18 –– March, 1999
The following terms and abbreviations are specific to this product.
For a complete listing of Allen-Bradley terminology, refer to the
Allen-Bradley Industrial Automation Glossary.
This term: Has the following definition:
CNA Board ControlNet Adapter Board
BRAM See Non-volatile memory.
Configuration
parameter
A configuration parameter is a sink parameter whose value may be
changed while the drive is in operation. Configuration parameters are
used to input reference and feedback information to the drive and to
provide monitoring points for control signals. Refer to the 1336
FORCE user manual for a description of source and sink parameters.
Drive units
Drive units are the actual values of the parameters as stored within the
drive parameter table. The drive units may be converted to engineering
units or to hexadecimal for display, or may be displayed directly in
drive units. All internal values in the drive are in terms of per unit
numbering.
Emulated Block
Transfer
The ControlNet network emulates the “block transfer” functions of the
1336 FORCE drive via messaging. The 1336 FORCE drive does not
support CI/O (the newest method of ControlNet block transfer).
Engineering
units Engineering units is a label given to parameter data that specifies what
units are to be used to display the parameter value.
Function blocks
A function block is a firmware subroutine that is stored in memory
within the ControlNet Adapter Board. The ControlNet Adapter Board
provides 28 different function block types. By combining function
blocks, you can customize the way your drive operates. Refer to the
1336 FORCE function block programming manual for more
information about function blocks.
NUI (Network
Update Interval) Actual update time, which is a user specified interval which is a power
of two multiple of the NUT (Network Update Time).
NUT (Network
Update Time) Repetitive time interval in which data can be sent on the ControlNet
network.
PCCC
Programmable Controller Communications Commands. An
application-level command set that Allen–Bradley programmable
controllers use to communicate across networks.
Scheduled
transfers Deterministic and repeatable transfers that are continuous and
asynchronous to the ladder-logic program scan.
Unscheduled
transfers Non-deterministic data transfers through ladder–initiated
communication or programming devices.
Class 1
Data Connection
See “Scheduled transfers”.
Class 3
Data Connection
See “Unscheduled transfers”.
Terms and Abbreviations