Second Circuit Program; Modifying Circuits - Siemens Logo! Manual

3.7.7 Second circuit program

Up to this point, you have successfully created your first
circuit, and assigned it a name and, if desired, a password.
In this section we are going to show you how to modify ex-
isting circuit programs and how to use the special func-
tions.
Using this second circuit program, we are going to show
you how to:
S
Add a block to an existing circuit program.
S
Select a block for a special function.
S
Assign parameters.

Modifying circuits

We shall use the first circuit program as a basis for the sec-
ond, with some slight modifications.
Let us take a first look at the circuit diagram for the second
circuit program:
L1
S1
K1
N
In LOGO!, this is the circuit program layout:
I1
I2
x
You can see the OR block and the output relay Q1 we have
already used in the first circuit program. The only difference
is the new off-delay block.
LOGO! Manual
A5E00380835-01
S2 K1
w1
x
Par
Programming LOGO!
You already know the first part of
the circuit. S1 and S2 switch a
relay, which is to be used to switch
on the load E1, and to switch off
the load with a delay of 12 minutes.
E1
This is the
new block
Q1
87