User Manual

LOGO! functions
4.1 Constants and connectors
LOGO!
Manual, 06/2014, A5E33039675
119
Shift register bits
LOGO! provides read-only shift register bits S1.1 to S4.8. Only the "Shift register"
(Page 211) special function can modify shift register bit values.
Cursor keys
Up to four cursor keys are available to you, namely C , C , C and C ("C" = "Cursor").
Cursor keys are programmed for the circuit program in the same way as other inputs. You
can program cursor keys in the corresponding display while the system is in RUN
(Page 78) , and in an active message text (ESC + Key). Cursor keys can save switches and
inputs, and allow operator control of the circuit program. Cursor key inputs from the
LOGO! TDE are identical to cursor key inputs from the LOGO! Base Module.
LOGO! TDE function keys
The LOGO! TDE has four function keys, F1, F2, F3, and F4, which you can use in your
circuit program. You program these keys in the same way as other inputs. Like the cursor
keys, you can press these keys when LOGO! is in RUN mode to affect the behavior of the
circuit program, and to save switches and inputs.
Levels
Voltage levels are designated
hi
and
lo
. A constant "1" = hi or "0" = lo status at the block can
be set by means of a permanent voltage level or constant value hi or lo.
Open connectors
LOGO! uses the letter
x
to indicate unused block connectors.
Network inputs/outputs (available only if configured from LOGO!Soft Comfort)
You can configure the following network inputs/outputs only from LOGO!Soft Comfort. If the
circuit program in LOGO! contains a network digital/analog I/O, you can not edit any of the
rest of the circuit program except for the Par parameter. To edit the rest of the program, you
must upload the program to LOGO!Soft Comfort and then edit from LOGO!Soft Comfort.
1) Network digital inputs
The letters
NI
identify a network digital input. There are 64 digital network digital inputs NI1
to NI64 available for configuration in the circuit program from LOGO!Soft Comfort.
2) Network analog inputs
The letters
NAI
identify a network analog input. There are 32 network analog inputs NAI1 to
NAI32 available for configuration in the circuit program from LOGO!Soft Comfort.