Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 67)

Publication 1756-UM534B-EN-P - November 2010 67
Configure Adapter Mode Chapter 3
Active Versus Monitored Racks on the Network
You must distinguish between active and monitored racks, and must manually
enter active racks into the 1756-RIO module’s configuration, and manually add
any desired block transfers.
On monitored racks, the 1756-RIO module picks up the block transfers
automatically, but must have the specific module type set. This insures that the
aliases you create for import into the RSLogix 5000 project have names that
better describe the data content. Otherwise, the generic module type, BT-
MODULE, is set.
If you want active racks, add them manually now, then download the modified
configuration to the 1756-RIO module.
In the configuration tree, each rack line precedes an icon representing rack
information. The icons represent type and size. The size, color, and position of
the colored block indicates the location, size, and type of partial rack, and
whether the rack is active or monitored.
Active Versus Monitored Racks
Type Description
Active The 1756-RIO module emulates one or more remote I/O racks. The ControlLogix controller sends the rack-
produced data, which is then sent as remote I/O input data to the scanner on the Remote I/O network. The
remote I/O scanner sends output data for those emulated racks to the 1756-RIO module in adapter mode. The RIO
module then sends that data to the ControlLogix controller as consumed input data.
Use ‘Active’ if you want to exchange data between a ControlLogix controller and a scanner on remote I/O. You
can also configure one or more slots in the Active rack as block transfer modules to exchange larger amounts of
data with the remote I/O scanner. Active racks are one or more racks that the 1756-RIO module is emulating to
share information between the existing scanner and the ControlLogix controller.
Any rack in the configuration tree that contains at least one portion of an Active rack displays with a lightning
bolt and a red indication on the active portion of the rack. The text ‘Actlnp:Ox.Data[xxx]’ also displays, indicating
that this data originated in the ControlLogix controller as output data that appears as input data to the remote I/
O scanner.
Monitor The 1756-RIO module monitors remote I/O inputs on an existing Remote I/O network, and passes data as
produced/consumed data to the ControlLogix controller. This is also known as ‘Monitor mode’. Use ‘Monitor
mode’ if you have a supervisory ControlLogix system that needs to collect data from an existing control system
with remote I/O.
Monitored racks are racks that physically exist on the Remote I/O network and are to be monitored by the 1756-
RIO module. Any portion of a rack in the configuration tree that is configured as ‘Monitor’ displays with a blue
indication on the rack.