Rockwell Automation 1336T PLC Comm. Adapter, Series B, FRN 2.xx-3.xx - Manual (Page 85)

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Publication 1336 FORCE–5.13 –– September, 1998
At times, you may want to customize the way your drive operates.
To help you with this task, function blocks have been included with
the PLC Communications Adapter Board. You can combine
function blocks together to operate on almost any part of the drive
functionality. The flexibility of the function block system allows
blocks to be used with the drive’s velocity or current control
parameters, drive–to–drive parameters, as well as analog and remote
I/O image parameters.
Important: This section is intended to be an overview of the
function block system. For more in–depth information,
refer to the Function Block Programming Manual.
The function block software provides the following advantages:
•
On smaller stand-alone applications, control programming can be
carried out completely within the drive.
•
On larger system applications, the loading of the PLC control
system can be reduced as control functions previously performed
within a PLC can be performed within the drive.
At the base of the function block system are the function blocks
themselves. A function block is a firmware subroutine that is stored
in memory within the PLC Communications Adapter Board. The
PLC Communications Adapter Board provides 28 different function
block types.
Understanding Function
Blocks