Siemens SIMATIC HMI Operating Instructions Manual page 97

①
Meaning of the LED displays
The LEDs are only activated when the HMI device is switched on.
Functions
PROFIsafe
communication
Power
Communication COM
Mobile Panel 277F IWLAN
Operating Instructions, 12/2007, A5E01003940-01
LED display
Designation
SAFE
PWR
5.2 Displays on the Mobile Panel 277F IWLAN
Color Meaning
Yellow The "SAFE" LED lights up when the HMI device is
integrated in the safety program of the F CPU. The
requirement for this is that PROFIsafe communication
has been established.
If the "SAFE" LED lights up, the emergency stop button is
effective.
Green The "PWR" LED only lights up or flashes when the HMI
device is switched on.
The "PWR" LED lights up under the following
circumstances:
The battery is fitted and charged.
•
The HMI device is in the charging station.
•
The HMI device is connected to the tabletop power
•
supply unit
The "PWR" LED flashes when the HMI device is in the
"POWER SAVE 2" state.
Green The "COM" LED remains off as long as no WLAN
network is configured.
The "COM" LED flashes when the HMI device is
attempting to establish a connection to a WLAN network.
The "COM" LED lights up when the HMI device has
established a connection to a WLAN network.
Operator controls and displays
97