Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations User Manual

Page 184

Quick Reference Section

Appendix A

AĆ15

Figure A.3

Block Transfer Instructions

Key Sequence

1770-T3 Display

Instruction Notes

BLOCK XFER

Output instruction.

Block length depends on kind of module.

Entire file transferred in one scan.

Data read from I/O module must be buffered.

Set block lengths equal or to default value for module.

Same module address used for read and write instructions

Enable read and write instructions in same scan.

Order of operation determined by the module.

NOTE: Numbers shown are default values. Numbers in shaded areas must be replaced by your entered values. The number of

default address digits initially displayed (3 or 4) will depend on the size of the data table.

Here is an explanation of each value:

Data Address

Module Address

Block Length

NOTE: Access the Data Monitor Display as follows:

Enter all instruction parameters. Press key sequence:

[DISPLAY] [0] for the binary monitor mode;

[DISPLAY] [1] for the hexadecimal monitor mode.

: First possible address in accumulated value area of data table.

: RGS for R = rack, G = module group, S = slot number.

: Number of words to be transferred. (00 can be entered for default value)

Uses two words of yser program for each instruction.

BLOCK XFER

Data Addr:

Module Addr:

Block Length:

030

001

File:

110-110

010

110

Block Xfer Write

Data Addr:

Module Addr:

Block Length:

030

001

File:

110-110

010

110

Block Xfer Read

Enter both instruction blocks for

bidirectional blcok transfer.

Refer to the module user's manual.

File : Address of first word of the file, 100 8 above the data address.