Rockwell Automation GMLC Reference Manual User Manual

Page 776

Publication GMLC-5.2 - November 1999

Using Block Transfers

739

The variable number is the Address listed in the column at the far right.

For example, the BCD data file shown below (in hexadecimal format)
sends the values 1, 2, 3, 4, and 5 to user variables 1 through 5
(respectively) in the motion controller, when specified in a BTW. Word 0
specifies that this block transfer is sending (7Bxx) user variables (xx00).
Word 1 specifies the first item as user variable 1 (0001). Word 2 specifies
32-bit signed BCD numeric format (2xxx) with two decimal digits
(x2xx), and that five variable values are to be sent (xx05). Word pairs 3, 4
through 11, 12 are the values to be sent. Word 13 is the end-of-block
delimiter (000D).

Data Table Report

PLC-5/30

Address

D13:0

7B00

0001

2205

0000

0100

0000

0200

0000

0300

0000

D13:10

0400

0000

0500

000D

0000

D13:20

0000

D13:30

0000

D13:40

0000

D13:50

0000

D13:60

0000

The values in the data file have been multiplied by 100 to account for the
two decimal digits specified in word 2. For example, to send the value 2
to user variable 2, 0000 is put in word 5 (the most significant word) and
200 BCD in word 6 (the least significant word). See Constructing the
PLC Data File in this chapter for more information.

Tag Explorer

Tag Window