Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 160)

Block Transfer
Chapter 14
14-5
Here is an explanation of each value:
This Value: Stores the:
Data Address First possible address in the timer/counter accumulated value area
of the data table
Module Address RGS for R = rack, G = module, S = slot number
Block Length Number of words to be transferred
(enter 00 for default value or for 64 words)
File Address of the first word of the file
Enable bit Ć(EN)Ć Automatically entered from the module address
Set on when the rung containing the instruction is true
Done bit Ć(DN)Ć Automatically entered from the module address
Remains on for 1 program scan following successful transfer
Data Address
The data address stores the module address of the block transfer module.
The data address must be assigned the first available address in the
timer/counter accumulated area of the data table. This depends on the
number of I/O racks being used (Table 14.B). When more than one block
transfer module is used, consecutive data addresses must be assigned ahead
of address for timer and counter instructions.
Table 14.B
The First Available Address in
Timer/Counter Area of Data Table
# I/O Racks First Available
Address
in Timer/
Counter Area
1 020
2 030
3 040
4 050
5 060
6 070
7 200
The last consecutive word in the accumulated area following the words
reserved for block transfer data addresses should be loaded with zeroes.
When the processor sees this boundary word, it does not search further for
block transfer data. In addition, the processor is prevented from finding
other BCD values that could, by chance, be in the same configuration as
the rack, group and slot numbers found in block transfer data addresses.