
SW1
SW2
Open cover to
access switches
1
30
Position = 1Position = 0
End View
1
30
87654321
01
87654321
01
NOTE:
Set switch SW2–3 to 0 if this rack
will have a unique address (not
complemented). If this rack address
is a duplicate of another I/O block
or chassis, set the switch to 1 for
primary or 0 for complementary.
Refer to Table C for the
complementary I/O rack address.
Default Switch
Settings = 0
ATTENTION: Cycle power to the module after
setting the switches.
Only block I/O modules with all inputs or all
outputs can use complementary I/O.
Installation Instructions
Block I/O
Cat. No. 1791-32A0 Series B
6
Figure 6
Switch
Settings
SW2–8
Not used
SW2–7
Not Used
SW2–6
Last I/O Group
(PLC-2 only)
0 Not last rack
1 Last rack
SW2–5
Processor
Restart/Lockout (PRL)
0 Processor Restart
1 Processor Lockout
SW2–4 Hold Last State
0 Reset Outputs
1 Hold Last State
SW2–3 Complementary I/O
1
0 Non-Complemented System
0 Complementary Rack
1
1 Primary Rack
1
1
See note.
Communication Rate
SW2–2 SW2–1 Bits/s
0 0 57.6 K
0 1 115.2 K
1 0 230.4 K
1 1 230.4 K
Starting Quarter
SW1–2 SW1–1
Module
Group
0 0 0 (1st)
0 1 2 (2nd)
1 0 4 (3rd)
1 1 6 (4th)
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