Rockwell Automation GMLC Reference Manual - Manual (Page 767)

Publication GMLC-5.2 - November 1999
730 Using the RIO Adapter Option
If the PLC is sending data to the motion controller, the remainder of the
BTW data file (words 3 through 2nn+2, where nn is the number of items
to be sent) contains the values of the specified items, and the last word
(word 2nn+3) is the end-of-block delimiter, as shown in the following
table.
Use a File Copy instruction in the PLC program to transfer the values that
you want from a floating bit file to the BTW data file. For example, the
following unconditional rung copies word 0 (32 bits) of floating bit file
F16 in the PLC to words 0 and 1 (16 bits each) of the integer file N7.
| |
| +-COP-------------------+ |
+---------------------------------------+ COPY FILE +------+
| | Source #F16:0 | |
| | Destination #N7:0 | |
| | Length 2 | |
| +-----------------------+ |
| |
Specifying N7 as the data file for the BTW as shown in Sending Data to
the Motion Controller in this chapter transfers the 32-bit floating-point
value to the motion controller.
RIO Adapter Block Transfer Write
32-bit Floating -Point Data File Format
Word Description
0
1
2 Data Type
First Data Item
Number and Format of Items: 30
nn
3
4 First Data Item Value Most Significant Word
First Data Item Value Least Significant Word
5
6 Second Data Item Value Most Significant Word
Second Data Item Value Least Significant Word
2 nn+1
2 nn+2
Last Data Item Value Most Significant Word
Last Data Item Value Least Significant Word
2 nn+3 End-of-Block Delimiter (000D hex)