Rockwell Automation 20-COMM-R Remote I/O Adapter - Manual (Page 31)

Configuring the Adapter 3-5
20-COMM-R Remote I/O Adapter User Manual
Publication 20COMM-UM004D-EN-P
Setting the Last Rack If adapter Configuration DIP Switches SW7 and SW8 ( Figure 2.2 ) are both
set to ‘On’, the value of Parameter 26 - [Last RIO Rack] notifies the
controller that this device is the last device on a specified rack. This
parameter must be set to ‘1’ (Enabled) if the drive is the last device on a
rack address that uses a PLC-2 controller. We recommend that you set this
parameter to ‘1’ (Enabled) whenever a device is the last device on a rack.
1. Set the value of Parameter 26 - [Last RIO Rack] to the desired state.
2. Reset the adapter (see Resetting the Adapter on page 3-8 ).
Setting the Rack Size If adapter Configuration DIP Switches SW7 and SW8 ( Figure 2.2 ) are both
set to ‘On’, the value of Parameter 27 - [Rack Size] determines the rack
size. With the 20-COMM-R adapter, you can use a 1/4 or 1/2 size rack. This
I/O is the Discrete I/O. For more information about using I/O, see
Chapter 4 , Using Discrete and Block Transfer I/O .
1. Set the value of Parameter 27 - [Rack Size] to the size required for your
application.
2. Reset the adapter (see Resetting the Adapter on page 3-8 ).
Port 5 Device
20-COMM-R
Parameter #: 26
Last RIO Rack
0
Disabled
Value Last Rack
0 Disabled (default)
1 Enabled
TIP: Additional I/O, such as Reference/Feedback and Datalinks, can be
transmitted using the Block Transfer I/O image.
Port 5 Device
20-COMM-R
Parameter #: 27
Rack Size
0
1/4 Rack
Value Rack Size
0 1/4 (default)
1 1/2