Replacing The Battery - Siemens SINUMERIK 840C Operator's Manual

01.99
11.2

Replacing the battery

Warning 1st step
Warning 2nd step
Replacing the
battery
Procedure
© Siemens AG 1999 All Rights Reserved
SINUMERIK 840C, OEM Version for Windows (BA)
There is a backup battery (beim CSB bis Erzeugnisstand C 6LR61, 550mA,
9V) on the central service board (CSB) 6FC5114-OAAO2-OAAO. The
following data is backed up with this battery voltage: PLC program, RPA,
TOA, SEA, SEA4, ZOA.
Note
The CSB module must not be removed from the subrack even if a battery is in
place, because the data to be battery-backed is not physically on the CSB.
Removing the CSB would automatically cause all data mentioned above to be
lost!
The battery backup voltage is monitored by the control.
Monitoring is performed in two steps:
Advance warning if the battery voltage falls below 6V, Alarm 101 "Advance
warning battery replacement" is triggered.
Alarm 1 "Data lost at power off", the threshold value is 4.8 V.
The period between warning steps 1 and 2 of battery monitoring is
approximately 4 weeks.
Note
The battery may not be replaced unless the control is switched on.
• Store and transport the battery in its packaging.
• Prior to installation, check the battery for any damage. Do not use damaged
batteries.
• Undo the screw on the battery cover
• Remove both cover and battery carefully
• Use the screwdriver to press the battery out of the battery cover
• Remove the contact piece from the battery
• Fix the new battery to the contact piece
−
for CSB from product version D: Lithium batteries
−
for CSB up to product version C: Alkaline batteries
(Varta, type 6127 503 074)
(Type 9LR61, 550mAh)
6FC5198-6AA60-0BP1
11 Maintenance
11-3