User Manual

LOGO! installation and wiring
2.4 Putting into operation
LOGO!
Manual, 04/2011, A5E03556174-01
63
2.4 Putting into operation
2.4.1 Switching the LOGO!/Power On
LOGO! does not have a power switch. The reaction of LOGO! during startup depends on the
following:
● Whether a circuit program is stored in LOGO!
● Whether a card is inserted (The card can be a LOGO! memory card, combined
memory/battery card, or SD card for a LOGO! 0BA7.)
● Whether this is a LOGO! version without display unit (LOGO!...o)
● The status of LOGO! at the time of power failure.
To ensure that the expansion module on LOGO! changes to RUN mode, check the following:
● Has the sliding contact between LOGO! and the expansion module snapped into place
properly?
● Is the power supply connected to the expansion module?
● In addition, always ensure that you switch on the power supply to the expansion module
first before activating the power supply to the LOGO! Base Module (or activate both
power supplies at the same time); if you do not do this, the system does not detect the
expansion module when you start up the LOGO! Base Module.