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8 Entries
| 12/10/2018 10:43 AM | |
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Posts: 9 Rating:
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Is it possible to switch off the Master CPU whilst it is running? Master CPU 417-4H Slave CPU 417-4H Thanks |
| 12/10/2018 11:12 AM | |
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Posts: 5521 Rating:
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hi, yes, in an H-System, it should be possible. The system should recognize it and switch to the other CPU. Why do you want to switch it off? regards, |
| 12/10/2018 11:17 AM | |
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Posts: 9 Rating:
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I have an EXTF LED on and i was wondering if i switched it off the fault might reset |
| 12/10/2018 11:21 AM | |
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Posts: 5521 Rating:
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have you had a look online, why the LED turn on? |
| 12/10/2018 11:22 AM | |
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Posts: 10 Rating:
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If EXT FLT LED is glowing then check any of your configured device is disconnected from the PLC. |
| 12/10/2018 11:23 AM | |
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Posts: 9 Rating:
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I am not actually sure on how to do that. Is there a manual on how to do that correctly? Thanks |
| 12/10/2018 4:25 PM | |
Joined: 1/28/2009 Last visit: 1/5/2026 Posts: 6892 Rating:
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Hello,
EXTF simply may be due to a dead battery and all other possibilities.To find out the exact reason, you need to consider all LEDs on connected devices and main CPUs plus reading the diagnostics buffer for a better understanding.Mostly , if you are well-experienced a simple glance to the system is enough to find the exact point of error. You will find more in THIS Manual for fault tolerant CPUs section 5.2.Force the master CPU to STOP or power cycle it without considering status of stand by CPU may lead to a machine/plant shutdown. I hope it helps, hdhosseini |
Last edited by: hdhosseini at: 12/10/2018 4:28:14 PM |
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| 12/11/2018 7:03 AM | |
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Posts: 9 Rating:
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Thanks for all the help guys. I intend to become experienced and knowledgeable |
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