B&R Industrial Automation GmbH Power Panel 65, Руководство пользователя

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Maintenance • Replacing the battery
104 Power Panel 65 User's manual V2.21
7.2 Replacing the battery
7.2.1 General information
The battery buffers the internal real-time clock (RTC) and SRAM data (remanent and permanent variables, User
RAM). The battery's buffer time is at least 3 years (at 50°C, 18.5 μA for the components being supplied and a
self-discharge of 40%).
It is only necessary to replace the battery on devices with a lithium battery (see the technical data for the Power
Panel device).
7.2.2 Evaluating the battery status
The status of the battery is determined immediately after the Power Panel is started and subsequently checked
by the system every 24 hours. During this measurement, the battery is subjected to a brief load (approximately 1
second) and then evaluated. Once determined, the battery status can be read in a customer application using the
BatteryStatusCPU
data point or the
HwGetBatteryInfo function (AsHW library)
.
Battery status Function
OK Data buffering is intact.
BAD From the point when battery capacity is recognized as insufficient (BAD), data buffering is intact for approximately
another 500 hours
Table 36: Battery status
Information:
The battery should only be replaced by qualified personnel.
7.2.3 Technical data
see "Replacement batteries" on page 98 .
7.2.4 Procedure for replacing the battery
•
Disconnect the power supply to the Power Panel.
•
Touch the housing or ground connection in order to discharge any electrostatic charge from your body.
•
Remove the battery cover from the top of the Power Panel device using a screwdriver (1).
1
Figure 2: Replacing the battery - Removing the battery cover