Logo!’S Connectors - Siemens Logo! Manual

Programming LOGO!
Note
LOGO! can recognize, read and switch the I/O of all ex-
pansion modules regardless of their type. The I/Os are
presented in the installation order of the modules.
The following I/Os and flag blocks are available for
creating your circuit program: : I1 to I24, AI1 to AI8, Q1 to
Q16, AQ1 and AQ2, M1 to M24 and AM1 to AM6. Also
available are the shift register bits S1 to S8, 4 cursor keys
C , C
Y
X16. More details are found in Chapter 4.1.
The following applies to inputs I7 and I8 of LOGO! 12/24...
and LOGO! 24/24o versions: If Ix is used in the circuit pro-
gram, this input signal is digital; signals at AIx are analog.
Input AIx can only represent the connector that is actually
capable of handling analog signals.
LOGO!'s connectors
The term connector refers to all connections and states in
LOGO! .
The digital I/O status can be '0' or '1'. Status '0' means that
the input does not carry a voltage. Status '1' means that the
input carries voltage.
We have introduced 'hi', 'lo' and 'x' connectors to make it
easier for you to create the circuit program:
'hi' (high) is assigned the status '1',
'lo' (low) is assigned the status '0'.
You do not have to use all the of connectors of a block. The
circuit program automatically assigns the unused connec-
tors a status that ensures proper functioning of the relevant
block. If you prefer to do so, you can identify unused con-
nectors with an 'x'.
For information on the meaning of the term "block", refer to
Chapter 3.3.
56
, C and C
" B A
, as well as 16 blank outputs X1 to
LOGO! Manual
A5E00380835-01