Rockwell Automation 1771-IXE/D Thermocouple/Millivolt Input Module User Manual - Manual (Page 69)

Block Transfer (Mini–PLC–2 and PLC–2/20 Processors) D–3
Publication 1771-6.5.130 Ć May 1999
The bits in the output image table control byte (bits 00 – 05) must be
programmed to specify a binary value equal to the number of words
to be transferred.
For example, NO TAG shows if your input module is set up to
transfer 6 words, you would set bits 01 and 02 of the lower image
table control byte. The binary equivalent of 6 words is 000110. You
would also set bit 07 when programming the module for block
transfer read operations. Bit 06 is used when block transfer write
operations are required.
Figure D.2
SettingBlock Length (Multiple GET Instructions only)
1 0 0 0 0 1 1 0
Data Address
Contains Module
Address in BCD
Output Image Table Control
Byte Contains Read
Enable Bit and Block
Length in Binary Code
010
012
017
027
030
1 2 0
Data Table
1
R
Control
Byte
Read 6 Words
from Module
Block Transfer
Read Enable Bit
For Block
Transfer Active
Operations Only
Output Image Table
12713
Number of
Words to
Transfer
Binary Bit Pattern
Lower Output Image Table Byte
05 04 03 02 01 00
Default 0 0 0 0 0 0
1 0 0 0 0 0 1
2 0 0 0 0 1 0
3 0 0 0 0 1 1
4 0 0 0 1 0 0
5 0 0 0 1 0 1
6 0 0 0 1 1 0
: :
18 0 1 0 0 1 0
19 0 1 0 0 1 1