Rockwell Automation 1771-IR , D17716.5.76 RTD INPUT MODULE - Manual (Page 58)

Block Transfer (Mini-PLC-2 and
PLC-2/20 Processors)
Appendix D
DĆ4
The input module transfers a specific number of words in one block length. The
number of words transferred is determined by the block length entered in the
output image table control byte corresponding to the module’s address.
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, Figure D.2 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.
Setting the Block Length
(Multiple GET Instructions
only)