Block Transfer Instructions - Rockwell Automation SMC Dialog Plus User Manual

Block Transfer Instructions

Block transfer operations with the 1203-GD1 communication module
require coordinated block transfer write (BTW) and block transfer
read (BTR) instructions to achieve successful data transmissions.
BTW
BLOCK TRNSFR WRITE
Rack: 02
Group:
Module:
Control Block: BT11:0
Data File: N10:10
Length: 64
Continuous:
Rack – The number reported here should correspond to the
communication module's rack assignment as selected via DIP switch
group one (SW1).
Group – The number reported here should correspond to the
communication module's starting group address via DIP switch group
two (SW2), switches 1 and 2.
Module – In all cases (with regards to the 1203-GD1 communication
module) the number 0 should be reported here.
①
Control Block – For this example a block transfer file type (BT) of
one element is used for the control block. An integer file (type N) of
five contiguous words could also be used.
①
Data File – The first word of the data file (integer, Type N) selected
for the BTW or BTR block is reported here.
Length – The block transfer message length (number of words) is
reported here.
①
It is critical that care is given to all file assignments to ensure that no overlapping or overwriting
occurs.
Serial Communications
BTR
BLOCK TRNSFR WRITE
(EN)
Rack:
0 Group:
(DN)
0 Module:
(ER)
Control Block:
Data File:
Length:
N Continuous:
8-21
(EN)
02
0
(DN)
0
(ER)
BT11:1
N10:90
64
N