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DP is blinking on 840d ncu 73.5B unit and PF on red

10/6/2019 8:51 AM	Rate (0)
samiraj Experienced Member Joined: 10/13/2012 Last visit: 2/10/2025 Posts: 79 Rating: (0)	Dear experts all , kindly help me to resolve the issue , DP is blinking on 840d ncu 73.5B unit and PF on red , i have tried hard reset(S4) and restore plc backup , still remain same and input alarm showing all , Advance thanks to all ------------------------------------------------------------------------------------------ Split from Connecting MCP483C + NCU573.5B. Attachment ncu73.5b_1.avi (132 Downloads)
	Last edited by: samiraj at: 10/06/2019 08:53:20 Last edited by: The Helping Hand at: 10/07/2019 15:10:19 New subject after splitting
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10/6/2019 9:16 AM	Rate (0)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 11/23/2024 Posts: 8092 Rating: (882)	samiraj DP is blinking on 840d ncu 73.5B unit and PF on red , i have tried hard reset(S4) and restore plc backup , still remain same and input alarm showing all , Hello, Instead of creating new post why you published your query in old post? Please provide detail information like NCU correct MLFB number, how this problem appeared? Do you face any data loss problem etc.? Why you cleared PLC data without diagnosis or analyzing the problem? PF red LED means PLC watchdog is active. To find out the reason, user need to go online & refer diagnosis buffer & not to clear PLC project. So with STEP 7 Simatic manager, go on line & refer PLC diagnosis buffer. Or post it here so that forum members could help you. HTH.

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This contribution was helpful to 1 thankful Users samiraj