Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 47)

Publication 1756-UM534B-EN-P - November 2010 47
Configure Scanner Mode Chapter 2
All block transfer data is mapped into one of the possible 10 produced/
consumed connections on the controller. Each produced/consumed
connection allows 248 16-bit words, in and out. There are two words of
overhead for each block transfer for control/status. The 1756-RIO module
can execute as many block transfers as the user configures up to the limits of
available memory mapped to the ControlLogix controller.
To configure a block transfer module, follow these steps.
1. On the 56RioCfgScan dialog box, expand the I/O tree to choose the
location where you want to add the module.
2. On the I/O tree, right-click the slot where you want to add the module
and select Module Properties.
IMPORTANT
Block transfers do not need MSG instructions to execute.
TIP
In scanner mode, block transfer modules can be configured
manually, also.