Commissioning the device
4.6 Switching off the device
SIMATIC IPC627D/827D
48 Operating Instructions, 09/2014, A5E32990859-AB
Switching off the device
Procedure
The on/off switch does not isolate the device from the mains. When the on/off switch is in
the position 0 "Off", the device is still supplied with line voltage to generate the internal
auxiliary voltage.
Always pull out the plug to isolate the device from the mains.
Microsoft operating systems and hardware components, such as hard drives, save your
data in internal caches. Files may be open or data may be being written when the power
supply is interrupted in the following ways:
• When you activate the on/off switch while the device is running (uncontrolled switch off)
• In the case of a hardware reset
• In the case of an unpredictable supply voltage failure
This results in data loss, which damages the device of plant. Follow these steps to prevent
data loss:
• Shut down the operating system with "Start > Shut down" before you switch off the
device.
• Protect the device and plant with a suitable uninterruptible power supply (UPS).
1. Open the function "Start > Shut down" in the Start menu.
The green LED "PC ON/WD" changes to yellow.
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