Rockwell Automation 1791-I0VW USER MANUAL - Manual (Page 23)

Chapter
3
3-1
Configuring Your Block I/O
In this chapter you will learn how to configure your block I/O when used
with PLC family programmable controllers. This includes the following:
setting the configuration switches
addressing the block I/O
To configure your block I/O for SLC family processors, refer to the user
manual for the 1747-SN scanner module.
ATTENTION: This module is not compatible with the
1747-DSN distributed I/O scanner module.
Each block I/O module has switches for setting:
transmission (baud) rate - used to set the communication rate chosen
for the remote I/O link
last state - when last state is enabled, a processor reset will keep the
outputs in their present (last) state; when last state is disabled, the
outputs will reset
processor restart lockout (PRL) - when PRL is enabled, the
programmable controller cannot automatically start up the module’s
communications if the power has been cycled to either the module or
the programmable controller
last rack - used to identify if the module contains the highest numbered
I/O group for the associated rack number
I/O group adress - used to identify which module group (0-1, 2-3, 4-5
or 6-7) the module should assign to its inputs/outputs
rack address - used to select the rack address of the module
RIO termination resistor - used to connect an internal resistor
(82 ohm, 150 ohm, or no resistor) across LINE 1 and 2 on the remote
I/O terminals
These switches are all accessible on the front or top of the module, as
shown in Figure 3.1.
Chapter Objectives
Setting the Configuration
Switches