Rockwell Automation 2711-ND3 PanelBuilder v2.60 Software User Manual - Manual (Page 70)

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
➀ The PLC receives and stores data from an
input device, in this example a flow sensor.
➁ 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
➂ 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.
➄ 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
➃ The PanelView now carries a copy of that
segment of the logic controllers data table.
Tag Name = Flow Rate
W 10 N7:0