Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 113)

Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013 113
Detail Drive Configuration and Operation Chapter 1
The “Path” in the communication tab of the block transfer message write is the
name of the DH+/RIO scanner module. The “Module Address” sets the channel
of the DH+/RIO scanner used, and the rack, group and slot of the
20-COMM-R.
For the block transfer message read, the destination tag
RIO_BT_Response_Data must be an array of 20, 30, or 60 INTs (depending on
how much data the user is receiving). This tag cannot be DINT.
The communication tab of the block transfer message read is setup the same as
the block transfer message write.
The block transfer messages on RIO are limited to 16-bit integers. Therefore, 32
bit parameters are split into 16 bit integers in the block transfer request and
response data. In order to write or read floating point or 32-bit integers the COP
(copy) instruction must be utilized. The copy instruction in ControlLogix
performs a bitwise copy. Set the length of the copy instruction to a value
appropriate for the destination data type.