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When The POWER Is OFF

6/6/2011 8:48 PM	Rate (0)
hatem eid Posts: 27 Rating: (0)	Hi , All,,, Please i need the steps that i should follow to power on the S7-400H System with no errors when the power is lost and come back again ,, And is there any restriction to power on the master or slave Rack first??? thanks your cooperation is highly appreciated
hatem eid Posts: 27 Rating: (0)
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6/6/2011 9:43 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 1/5/2026 Posts: 6892 Rating: (1368)	hatem eid Hi , All,,, Please i need the steps that i should follow to power on the S7-400H System with no errors when the power is lost and come back again ,, And is there any restriction to power on the master or slave Rack first??? thanks your cooperation is highly appreciated Please check this manual for more information: SIMATIC Fault-tolerant Systems S7-400H see section : 8-4 the operating states of the H-CPUs regards
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6/6/2011 11:21 PM	Rate (0)
Ayman Elotaify Diamond Member Joined: 5/28/2008 Last visit: 1/14/2026 Posts: 4522 Rating: (843)	hatem eid Hi , All,,, Please i need the steps that i should follow to power on the S7-400H System with no errors when the power is lost and come back again ,, And is there any restriction to power on the master or slave Rack first??? thanks your cooperation is highly appreciated Hello hatem, No certain restrictions, If you powered up a single rack first, then it will work as a solo mode. Redundnt Fault will be triggered. When you power up the second rack, then the first rack will remain as master and the second will be as slave and redundancy fault will be cleared. It is better to supply each power supply from separite source. It's increase the avilability.
	Ayman Elotaify
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6/7/2011 12:37 PM	Rate (0)
hatem eid Posts: 27 Rating: (0)	Dear ALL,,,, Eng. Ayman , Thanks, For your help Your cooperation is highly appreciated
hatem eid Posts: 27 Rating: (0)
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