LOGO! manual
EWA 4NEB 712 6006-02
50
LOGO! represents the state of an input or output as follows:
Input/output has the state ’1’: inverse
Input/output has the state ’0’: not inverse
I:123456
Mo 09:00
Q:1234 RUN
Let’s have a look at that in our example:
When switch S1 is closed, volt-
age is applied to input I1, which
has the state ’1’.
LOGO! uses the program to
calculate the states of the out-
puts.
Output Q1 has the state
’1’ here.
When Q1 has the state ’1’,
LOGO! operates relay Q1 and
the consumer at Q1 is supplied
with voltage.
I:123456
Mo 09:00
Q:1234 RUN
L1
N
S1 S2
=1
I1
I2
Q1
Programming LOGO!
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