Rockwell Automation 1336T PLC Comm. Adapter, Series B, FRN 2.xx-3.xx - Manual (Page 56)

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Publication 1336 FORCE–5.13 –– September, 1998
Data Storage
To use the block transfer instructions in the PLC program, you need
to reserve several words for data storage. Some of these words are
required for internal use by the block transfer function and some
contain the block transfer message information. In the PLC-5, the
BTW and BTR blocks require the use of two sets of words.
The next two figures show the BTW and BTR blocks used for block
transfer in the PLC-5 along with example information associated
with these blocks. A brief description of the information contained
in these blocks specifically for the PLC-5 follows.
For more information on the PLC-5 and the PLC-3, refer to your
PLC Control Manual.
The following figure shows the block transfer instructions used for
PLC 5/15 and 5/25’s.
Block Transfer Write
Rack:
Group:
Module:
Control Block:
Data File:
Length:
Continuous:
1
0
0
N111:5
20
N
N111:0
(EN)
(DN)
(ER)
BTR
Block Transfer Read
Rack:
Group:
Module:
Control Block:
Data File:
Length:
Continuous:
1
0
0
N111:50
24
N
N111:90
(EN)
(DN)
(ER)
BTW
"