Rockwell-automation 2711-ND3 PanelBuilder v2.60 Software User Manual Manual de usuario Pagina 70

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4–14 Communications Overview
Publication 2711-6.0
Block Transfer Write Example
The following example illustrates a block transfer write. The
PanelView terminal is assigned to rack #3, starting module group 0.
One of the PanelView objects, a bar graph display addressed as N7:0,
reads a portion of the data block being transferred.
BTW
(EN)
BLOCK TRANSFER WRITE
Rack 03
Group 0
Module 0
Control Block N16:1
Data File N7:0
Length 10
Continuous N
The PLC receives and stores data from an
input device, in this example a flow sensor.
The PLC ladder logic program initiates a
block transfer of a data block (10 words)
containing the screen display data.
Bar Graph Object with
Tag Name ’Flow Rate’ = Address N7:5
The PanelView terminal receives the data and
determines the starting address for the write
operation by matching the block size with the
address entered in the Block Transfer dialog.
The PanelView updates the bar graph display
using the data from the controller.
Flow Rate
Transducer
Data
From
PLC
N7:5
10 WORDS
N7:0
N7:1
N7:2
N7:3
N7:4
N7:5
N7:6
N7:7
N7:8
N7:9
Flow Rate Data
The PanelView now carries a copy of that
segment of the logic controllers data table.
Tag Name = Flow Rate
W10N7:0
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