Constants And Connectors - Co - Siemens LOGO! 24RC Manual

4.1 Constants and Connectors – Co
Constants and connectors (connectors = Co) are inputs,
outputs, memory markers and fixed voltage levels
(constants).
Inputs
Inputs are identified by the letter I. The input numbers (I1,
I2, ...) correspond to the numbers of the input connectors
on LOGO!.
Analog inputs
The LOGO! models LOGO! 24, LOGO! 12/24RC and
LOGO! 12/24RCo include the inputs I7 and I8, which can
also be used as AI1 and AI2, depending on how they are
programmed. If the inputs are used as I7 and I8, the signal
applied is interpreted as a digital value. If they are used as
AI1 and AI2, the signals are interpreted as analog values.
In the case of special functions, which can only be effec-
tively connected with analog inputs on the input side, only
the analog inputs AI1 and AI2 are offered for selection in
programming mode when the input signal is selected.
ASi inputs
Inputs Ia1 to Ia4 are also available for communication via
the ASi bus in LOGO! variants with an AS interface con-
nection (LOGO!...B11).
Outputs
Outputs are identified by the letter Q. The output numbers
(Q1, Q2, ...) correspond to the numbers of the output con-
nectors on LOGO!.
Outputs Qa1 to Qa4 are also available for communication
via the ASi bus with LOGO! variants with an AS interface
connection (LOGO!...B11).
LOGO! Manual
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LOGO! Functions
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