Siemens SIMATIC PG 720, Manual

Page: 35 / 110

4
4-3
PG 720 Programming Device
C79000-G7076-C720-02
4.2 Battery Operation
If no external power supply unit is connected, you can operate the PG 720
using the integrated battery.
1. Switch on the device. Make sure that the battery is sufficiently charged
before you start work. The power LED is lit green as long as the battery is
sufficiently charged.
2. Work as normal with your PG 720.
3. As soon as the power LED lights up red in battery operation, this
indicates that the battery is almost run down. Stop working and save your
data.
Note
You should only begin working in the battery mode when the battery is
completely charged. Only then can you be sure that the full operating time is
available and that the battery running down will be indicated in good time. The
battery is fully charged when the power LED changes from charging (orange)
to charged (green) after switching on with the unit connected to the mains power
system.
When you first start up, the battery may be partly or completely discharged.
Connect the programming device to the power supply using the power supply
unit to charge the battery.
You can replace a discharged or faulty battery with a fully charged spare
battery (order number see Product Information Bulletin), as follows:
1. Switch off the device.
2. Pull out the support from the stand and open out the extra support.
3. Tilt the unit through approximately 90
°
.
4. Open the battery cover on the bottom of the device by pushing it down.
5. Disconnect the battery connections and remove the battery.
6. Insert the new battery and connect it.
7. Close the cover.
Battery Operation
Replacing the
Battery
Installing the PG 720