Rockwell Automation 1791-I0VX BLOCK I/O - Manual (Page 29)

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 learn how to configure your block I/O when used with SLC 500
processors, refer to the publication for the 1747-SN Remote I/O Scanner
Module.
Each block I/O module has multiple-position 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 (switch 4 on),
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. Press Input and Output pushbuttons
simultaneously to reset PRL.
last rack - used to identify if the module contains the highest numbered
I/O group for the associated rack number
I/O group address - used to identify which module group (0-3 or 4-7)
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