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EXTF fault on S7-400 station

Created by: Jasner at: 5/10/2011 8:55 AM (3 Replies)

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5/10/2011 8:55 AM	Rate (0)
Jasner Experienced Member Joined: 6/10/2008 Last visit: 12/1/2025 Posts: 198 Rating: (1)	Helo to all, recently I noticed that on one of redundant S7-400 station, there is EXTF red LED and aslo BATT1F. I know that this comes from empty or faulty backup battery. Can you please explain me what is the role of this backup battery If it is very important, is it possbile to exchange it while station is in operation? Thanks

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5/10/2011 10:22 AM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	I think you find your answers here: /tf/WW/en/Posts/57307 Attachment battery.pdf (673 Downloads)
	Last edited by: Marcjan at: 5/10/2011 10:25 AM attached part off manual Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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5/10/2011 11:10 AM	Rate (0)
gre_m Posts: 947 Rating: (45)	BATT1F = battery 1 fault.
gre_m Posts: 947 Rating: (45)
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6/16/2011 7:06 AM	Rate (0)
AntexL Posts: 1 Rating: (0)	Backup Battery saves the programm in memory of PLC, when power is down. Then controller is running, You may replace any of this battery without trouble. This operation don`t needed STOP mode or interrupt processes.
AntexL Posts: 1 Rating: (0)
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