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Old June 22nd, 2018, 10:50 AM   #1

Sabari34 is offline
Join Date: Jun 2018
Location: Visakhapatnam
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Siemens CPU 416-2 ( EXTF & BUS2F - FAULT )

Hi all !!!

I'm new to siemens PLC & drive System.

Now I'm facing problem with one of our equipment which has Siemens PLC ( CPU 416-2 ) and continuously EXTF ( Solid red indication ) & BUS2F ( Blinking red indication ) is coming. Kindly guide me to troubleshoot this issue and also explain how to check the profibus communication healthiness.
Connected devices are
1, ET200M
2, Absolute encoder
3, Belt weigher controller & etc.

Thanks In advance

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Old June 22nd, 2018, 11:50 AM   #2

sigmadelta is offline
Join Date: Apr 2016
Location: From Canada - Living in Bulgaria
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Connect with STEP 7 software and look at the Diagnostic Buffer in the CPU.
Freelance Automation Programmer
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Old June 22nd, 2018, 04:12 PM   #3
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cardosocea is offline
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Location: Fields of corn
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Which of those three remote nodes on the Profibus network isn't working?

On Step7, I find troubleshooting PRofibus to be best done via the hardware configuration by going online with the PLC.
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Old June 22nd, 2018, 06:35 PM   #4
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the_msp is offline
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note, wouldn't play in firefox, would play in edge browser

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