Rockwell-automation 150 USE MN/SMC DIALOG + CONTROLLER Uživatelský manuál Strana 130

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Serial Communications
8-21
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.
Rack The number reported here should correspond to the
communication module’s rack assignment as selected via DIP switch
group one (SW1).
GroupThe 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.
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.
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.
It is critical that care is given to all file assignments to ensure that no overlapping or overwriting
occurs.
BLOCK TRNSFR WRITE
Rack: 02
Group: 0
Module: 0
Control Block: BT11:0
Data File: N10:10
Length: 64
Continuous: N
BTW
(EN)
(DN)
(ER)
BLOCK TRNSFR WRITE
Rack: 02
Group: 0
Module: 0
Control Block: BT11:1
Data File: N10:90
Length: 64
Continuous: N
BTR
(EN)
(DN)
(ER)
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