Operator controls and displays
5.3 Power management
Mobile Panel 277F IWLAN
98
Operating Instructions, 12/2007, A5E01003940-01
Functions
Designation
Color
Meaning
Effective range RNG
Green The "RNG" lights up when the HMI device is logged onto
the effective range.
If a communication error occurs after the HMI device has
logged onto the effective range, the "RNG" lights up until
PROFIsafe communication is reestablished and the
communication error has been acknowledged.
The "RNG" LED goes out when the HMI device logs off
from the effective range.
Battery status
BAT
Green/
red
The "BAT" LED goes out under the following
circumstances:
•
The main battery is empty
•
The main battery is not installed
The "BAT" LED flashes when the main battery is being
charged.
The "BAT" LED lights up red when the main battery has a
charging status of less than 10%.
The "BAT" LED lights up green when the main battery
has a charging status of at least 10%.
5.3
Power management
Introduction
The HMI device is equipped with a power management function. If you do not operate the
HMI device for a configurable time interval, power management will switch the HMI device to
power save mode. This extends the operation time of the HMI device until the next battery
change or charging of the battery.
States
Power management has two levels of power saving:
● "Power Save 1"
Reduces the brightness of the touch screen.
● "Power Save 2"
– The touch screen is switched off.
– The function keys and associated LEDs are switched off.
– The handwheel and the illuminated pushbuttons are switched off.
– Other power save measures are activated.
In WinCC flexible, power management is parameterized in "Device settings" under "Power
management".
