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status led in S7-300

7/30/2013 4:25 AM	Rate (0)
hieutran8969 Bronze Member Joined: 11/17/2011 Last visit: 10/18/2025 Posts: 123 Rating: (1)	dear all, i have question about status led of S7-300 (CPU 313C). all led of CPU (SF, DC5V, FRCE, RUN, Stop) flash at 0.5 Hz. can you tell me what happen with my CPU? thanks in advance,

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7/30/2013 4:57 AM	Rate (0)
playerslight Posts: 1064 Rating: (72)	what does the diagnostics tell you ,this is always a good place to start
playerslight Posts: 1064 Rating: (72)
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This contribution was helpful to 2 thankful Users Berg Denker

7/30/2013 5:43 AM	Rate (0)
Berg Gold Member Joined: 1/17/2006 Last visit: 12/28/2025 Posts: 555 Rating: (29)	For additional information of how to reach the Diagnostic Buffer, accordingUMENCHOpost... Hello, And when you connected to the CPU, did you check what does write in Diagnostic Buffer? (Right click on CPU, select PLC - Module Information (Ctrl+D). Go on Diagnostic Buffer. Make screenshot and attach here... Regards

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This contribution was helpful to 2 thankful Users playerslight Denker

7/30/2013 7:14 AM	Rate (0)
umencho Grandmaster Joined: 3/21/2006 Last visit: 1/10/2026 Posts: 10247 Rating: (1183)	In case he has not ONLINE access - is there a memory card plugged in? How that behaviour happen? Is this a new CPU? Best regards, Hristo Mihalev

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This contribution was helpful to 2 thankful Users Berg playerslight

7/30/2013 4:43 PM	Rate (0)
Berg Gold Member Joined: 1/17/2006 Last visit: 12/28/2025 Posts: 555 Rating: (29)	UMENCHO In case he has not ONLINE access - is there a memory card plugged in? How that behaviour happen? Is this a new CPU? Best regards, Hristo Mihalev Sorry my mistake UMENCHO ... Well, this thread tells something about all LEDs blinking and MMC: CPU 315-2DP all LED's blink randomly Regads.

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This contribution was helpful to 1 thankful Users playerslight

8/2/2013 5:44 AM	Rate (0)
hieutran8969 Bronze Member Joined: 11/17/2011 Last visit: 10/18/2025 Posts: 123 Rating: (1)	dear all, i can not connect to PLC. my PLC is old, and i insert one new MMC. when CPU have MMC or not, all led of PLC flashing with 0.5 Hz. i wonder it lose firmware of CPU. and what ways can fix that problem? thanks,

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