User Manual

LOGO! without display ("LOGO! Pure")
LOGO!
322 Manual, 06/2014, A5E33039675
Ethernet interface (Page 48) to find the details about the wiring of the Ethernet interface and
also about the status of the Ethernet LEDs.
Operating characteristics
LOGO! is ready for operation when you switch on power. Switching off a LOGO! without
display is equivalent to disconnecting the power supply.
You can not start or stop the circuit program of LOGO!...o versions by means of buttons,
therefore, this is why the LOGO!...o versions have other startup characteristics.
Startup characteristics
If there is no circuit program in LOGO! or on the inserted micro SD card, LOGO! remains in
STOP mode.
If there is a valid circuit program in LOGO! memory or on the micro SD card, LOGO!
automatically switches from STOP mode to RUN mode when you switch on power.
LOGO! automatically copies the circuit program on an inserted micro SD card to memory,
immediately after you switch on power. LOGO! rewrites the existing circuit program in
memory if one exists, and then changes from STOP mode to RUN mode.
By connecting an Ethernet cable to LOGO! (Page 285), you can use LOGO!Soft Comfort to
download the circuit program and place LOGO! in RUN mode.
Operating status indication
An LED on the front panel indicates the operating state:
● Lights red: Power On/STOP
● Lights green: Power On/RUN
The LED lights red after Power On and in all LOGO! states other than RUN mode. The LED
lights green when LOGO! is in RUN mode.
Reading current data
LOGO!Soft Comfort provides an online test for reading the current data of all functions while
the system is in RUN.
If your LOGO! without display holds a protected micro SD card, you cannot read the current
data unless you enter the correct password (Page 281) for the circuit program. LOGO!
deletes the circuit program from memory when you remove the micro SD card.
Deleting the circuit program
Use LOGO!Soft Comfort to delete the circuit program and password if a password exists.