Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL - Manual (Page 97)

Planning Your Application
Chapter 4
4-22
Rack Number—choices are limited according to the type of PLC
controller you defined as PLC Type.
Rack Size—may be specified as 1/4, 1/2, 3/4 or FULL. Circle the size
of your choice.
Starting Module Group—may be specified as 0, 2, 4, or 6. Circle the
starting module group of your choice.
Last Rack—Circle Y (yes) if there are no other fractional PLC rack
assignments that have the same rack number and a higher starting
module group number. Otherwise circle N (no).
Block Transfer Assignments
For each block transfer file, the block transfer file and the block transfer
control address in the PLC discrete I/O must be defined. Refer to your
Object Address List to define the following:
Block Transfer File Number—circle the block transfers you are using
(1–5).
Rack Number—the available rack numbers used in the block transfer
assignments are determined by the rack assignments described
previously.
Module Group—you assign the module group (16-bit word) which will
contain the block transfer control byte (high or low byte). This applies
to both the discrete input and output image table words for the
applicable rack number. The Module Group must correspond to the
module group and rack size boundaries of the rack in the rack
assignment table with the same rack number.
Byte—circle Hi or Lo to designate the high or low control byte. You
cannot enter the same rack number, module group and control byte for
more than one block transfer assignment.
IMPORTANT: The 1771-SN and 1747-SN Modules do not support block
transfers to a remote I/O device. Block transfer assignments are only
applicable if you are using one of the other remote 1771 I/O Scanner
Devices.
Number of Words—document the specific number of words required
by a block transfer assignment