Types of ladder logic connections, Series logic – Rockwell Automation 9323-PA1E USER MANUAL APS 6.0 User Manual
Page 59
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Ladder Logic Program Basics
4–5
Inputs
Output
Bit Status
Time
XIC
XIO
OTE
XIC
XIO
OTE
t
1
(initial)
False
True
False
0
0
0
t
2
True
True
Goes True
1
0
1
t
3
True
False
Goes False
1
1
0
t
4
False
False
Remains False
0
1
0
Types of Ladder Logic Connections
In a ladder logic diagram each of the input devices are represented in series or
parallel logic combinations across the rung of the ladder. The last element on the
rung is the output that receives the action as a result of the conditional state of the
inputs on the rung.
Series Logic
In the previous section on logical continuity, you have seen examples of series
(AND) logic. This means that when all input conditions in the path are true,
energize the output.
a
b
c
In the above example, if A and B are true, energize C.
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