Rockwell-automation GMLC Reference Manual Manual de usuario Pagina 744

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Publication GMLC-5.2 - November 1999
Using Block Transfers 707
The data to be read from the motion controller is specified in a data file in
the PLC (N14 in the previous example), as explained in Constructing the
PLC Data File in this chapter. The data returned by the BTR must be
stored in another data file (N7 in the example above) in the PLC. After
completing the BTR, this data file contains the returned values.
The type of data file used to store the values returned by the BTR depends
on the numeric format specified for the transfer, as shown in the table
below.
* Floating-point values must be block transferred into an integer file and
then copied to a floating bit file in the PLC.
The format of the returned data file also depends on the numeric format
specified for the transfer, as explained in Number and Format of Items in
this chapter.
!
ATTENTION:
Be sure to specify the correct BTR file type
for the numeric format of the transferred values.
RIO Adapter Block Transfer Write Data File Types
Numeric Format PLC File Type
32-bit Integer Integer (N)
16-bit Integer Integer (N)
32-bit Signed BCD BCD (D)
32-bit Floating-Point Integer* (N)
Word-Swapped 32-bit Integer Integer (N)
Word-Swapped 32-bit Signed BCD BCD (D)
Word-Swapped 32-bit Floating-Point Integer* (N)
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