Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 187)

Block Transfer
Chapter 10
10Ć4
The format of a block transfer read and a block transfer write instruction
with default values is shown in Figure 10.3.
Figure 10.3
Block Transfer Format
BLOCK XFER WRITE
DATA ADDR 030
MODULE ADDR 100
BLOCK LENGTH 01
FILE 110- 110
010
(EN)
06
Numbers shown are default values. Bold numbers must be replaced by userĆentered values. The number of default address digits initially
displayed (3 or 4) will depend on the size of the data table.
DATA ADDRESS : First possible address in accumulated value area of data table.
MODULE ADDRESS : RGS for R = Rack, G = Module Group, S = Slot Number.
BLOCK LENGTH : Number of words to be transferred (00 can be entered for default value or for 64 words).
FILE : Address of first word of the file, 100
8
above the data address.
ENABLE BIT -(EN)- : Automatically entered from the module address. Set on when rung containing the instruction is true.
DONE BIT -(DN)- : Automatically entered from the module address. Remains on for 1 scan following successful transfer.
110
(DN)
06
BLOCK XFER READ
DATA ADDR 030
MODULE ADDR 100
BLOCK LENGTH 01
FILE 110- 110
010
(EN)
07
110
(DN)
07
The data address is used to store 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 upon
the number of I/O racks being used (Table 10.B). When more than one
block transfer module is used, consecutive data addresses must be assigned
ahead of address for timer and counter instructions.
10.2
Block Transfer Instructions
10.2.1
Data Address and Module
Address