Chapter 8 – Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS User Manual

Page 166

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background image

Chapter 8

8Ć5

Figure 8.3

BlockĆtransferĆreadĆinstruction Example (PLCĆ2/30 or MiniĆPLCĆ2/15)

1

R

Block length code

Data Table

1

2

1

1

R

0

6

0

010

012
017

027
030

110

112

117

130

Output Image Table

Byte contains Read

Enable Bit and Block

Length in binary code.

Data Address contains

Module Address in BCD

Input Image Table Byte

contains Done Bit

Storage location of file

address in BCD

First file word

Last file word

EN

BLOCK XFER READ
DATA ADDR:
MODULE ADDR:
BLOCK LENGTH:
FILE:

030
121

00

060- 067

DN

012

17

112

17

Output

Image

Table

Timer/

Counter

Accumulated

Area

Input

Image

Table

Timer/

Counter

Preset

Area

11057

Block Transfer Data

060

067

R = Bit 17 = READ

113

02

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