Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual - Manual (Page 55)

Assigning Addressing Modes,
Racks, and Groups
Chapter 4
4-13
Figure 4.5
Complementary I/O Configurations with 2ĆSlot Addressing
I O I O O
I
BT
BT
BT
Double–slot
BT
Double–slot
BT
E
M
P
T
Y
E
M
P
T
Y
E
M
P
T
Y
E
M
P
T
Y
E
M
P
T
Y
E
M
P
T
Y
E
M
P
T
Y
0 2 1 3 4 5 6 7
O
0 2 1 3 4 5 6 7
2
1 3
13079
3 3 3 3 3
8
I
8 8
O
8
16 16
O
8
O
8
8
8
O
16
O
8
O
8
I
8
I
8
O
8
O
8
O
8
O
8
O
8
I
16 16
I
16
O
16
I
16
I
16
I
16
I
16
I
16
I
16
O
16
O
16
O
16
O
16
O
16
O
16
1
Primary 16ĆSlot
Chassis
I/O Group
Number
Complementary
16ĆSlot Chassis
Primary 16ĆSlot
Chassis
I/O Group
Number
Complementary
Chassis Not
Allowed
Except for Output
Outputs in the complementary chassis use the same bits in the output image table as
the outputs in the primary chassis.
I = Input Module O = Output Module BT = Block Transfer Module 8 = 8Ćpoint I/O Modules 16 = 16Ć point I/O Modules
1 Output modules use the same output image transfer bits
2 Can be 8Ćpoint input or output module or singleĆslot block transfer module
3 Must be empty if corresponding primary slot is block transfer module
Example A
Example B