Siemens LOGO! 230 RC - First Program

LOGO! manual
EWA 4NEB 712 6006-02
44
>Edit Prg
Clear Prg
Set Clock
LOGO!’s programming menu
Here too, you can move the ”>” by pressing the and keys. Position the
”>” on ”Edit Prg” (i.e. to enter the program), and press the OK key.
LOGO! then shows you the first output:
LOGO!’s first output
Q1
You can use the and keys to select the other outputs. At this point, you
begin to enter your circuit.
3.11.2 First program
Let’s have a look at the following circuit: a parallel connection of two
switches. In the circuit diagram, the circuit looks like this:
”Q1”
S1
”Q1”
S2
E1
The consumer is switched on by
switch S1 or switch S2. As far as
LOGO! is concerned, the parallel
connection of the switches is an OR
block, because S1 or S2 switches
the output on.
Translated into the LOGO! program, this means: Relay K1 (in LOGO!:
Q1) is controlled by an OR block. I1 and I2 are connected to the input of
the OR block, S1 to I1 and S2 to I2.
Thus, the program in LOGO! looks like this:
I1
I2
x
Q1
1
Programming LOGO!