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Red Error LED

Created by: Laser_man at: 12/21/2021 9:53 AM (7 Replies)

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12/21/2021 9:53 AM	Rate (0)
Laser_man Member Joined: 9/10/2021 Last visit: 1/26/2023 Posts: 5 Rating: (0)	Hi I built a Laser system built around a CPU 1212C. It was fully functionally tested in our factory and then dispatched to America. When our customer tried to use the laser there was problems. I did some diagnostics via Teamviewer which gave me some suspicions so got him to send a photo of the PLC and on receipt my fears were realised, the Red Error LED was flashing and no other LEDs on the PLC or expansion module (SM 1223) were lit Is it possible that when it went through American customs that it wiped the PLC with the X-ray scanner? ------------------------------------------------------------------------------------------ Split from S7 1200 CPU 1214C Error Led is Blinking.
	Last edited by: Jen_Moderator at: 12/21/2021 13:17:07 New subject after splitting
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12/21/2021 10:06 AM	Rate (0)
Mr.V Silver Member Joined: 6/19/2019 Last visit: 3/13/2023 Posts: 563 Rating: (60)	Hello, Have you appreciate what in USA operate 120V and 60Hz or something like that? Or they do mistake and connect both phases??
	Last edited by: Mr.V at: 12/21/2021 10:11:18
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12/21/2021 10:17 AM	Rate (0)
Laser_man Member Joined: 9/10/2021 Last visit: 1/26/2023 Posts: 5 Rating: (0)	Sorry, should of said that the 24vdc PSU powering the PLC will work down to 100vac I have attached a short video of the problem Attachment Video.mov (160 Downloads)
	Last edited by: Laser_man at: 12/21/2021 11:07:52 Last edited by: Laser_man at: 12/21/2021 14:45:58 Last edited by: Laser_man at: 12/21/2021 14:46:52
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12/21/2021 4:20 PM	Rate (1)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/22/2023 Posts: 13200 Rating: (2147)	When you tested, did you test with 50 Hz / 230VAC 1ph / 400 VAC 3ph, or did you test with the same voltage / frequency your American customer uses? Is there a Siemens HMI connected to the PLC? If so, did you include the diagnostics buffer screens provided with Portal so your customer could review the information available in there that tells you what is wrong? Does the PLC have any profinet / profibus communications? Is the s7-1212 DC/DC/DC, or AC/DC/DC, or something else? What did you discover via teamviewer to check the PLC diagnostics buffer for the reason for the red error LED? Laser_man Hi I built a Laser system built around a CPU 1212C. It was fully functionally tested in our factory and then dispatched to America. When our customer tried to use the laser there was problems. I did some diagnostics via Teamviewer which gave me some suspicions so got him to send a photo of the PLC and on receipt my fears were realised, the Red Error LED was flashing and no other LEDs on the PLC or expansion module (SM 1223) were lit Is it possible that when it went through American customs that it wiped the PLC with the X-ray scanner? ------------------------------------------------------------------------------------------ Split from S7 1200 CPU 1214C Error Led is Blinking.
	science guy
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12/22/2021 10:24 AM	Rate (1)
icewind Regular Member Joined: 5/13/2019 Last visit: 12/2/2022 Posts: 32 Rating: (3)	Laser_man Hi I built a Laser system built around a CPU 1212C. It was fully functionally tested in our factory and then dispatched to America. When our customer tried to use the laser there was problems. I did some diagnostics via Teamviewer which gave me some suspicions so got him to send a photo of the PLC and on receipt my fears were realised, the Red Error LED was flashing and no other LEDs on the PLC or expansion module (SM 1223) were lit Is it possible that when it went through American customs that it wiped the PLC with the X-ray scanner? ------------------------------------------------------------------------------------------ Split from S7 1200 CPU 1214C Error Led is Blinking. There is no power on the module! PLC may give the error because of not founding of module. Can you check the module connection to PLC. It seems seperated a little bit from Cpu.

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12/22/2021 10:47 AM	Rate (0)
Laser_man Member Joined: 9/10/2021 Last visit: 1/26/2023 Posts: 5 Rating: (0)	Hi There is no HMI or Profinet coms The PLC is a CPU 1212C - DC/DC/RLY When on Teamviewer I found the colour combination of the LEDs on the front panel of the laser system wasn't in a sequence that I had programmed, the sequence only happens with no programme in it 0_Einstein When you tested, did you test with 50 Hz / 230VAC 1ph / 400 VAC 3ph, or did you test with the same voltage / frequency your American customer uses? Is there a Siemens HMI connected to the PLC? If so, did you include the diagnostics buffer screens provided with Portal so your customer could review the information available in there that tells you what is wrong? Does the PLC have any profinet / profibus communications? Is the s7-1212 DC/DC/DC, or AC/DC/DC, or something else? What did you discover via teamviewer to check the PLC diagnostics buffer for the reason for the red error LED? Laser_man Hi I built a Laser system built around a CPU 1212C. It was fully functionally tested in our factory and then dispatched to America. When our customer tried to use the laser there was problems. I did some diagnostics via Teamviewer which gave me some suspicions so got him to send a photo of the PLC and on receipt my fears were realised, the Red Error LED was flashing and no other LEDs on the PLC or expansion module (SM 1223) were lit Is it possible that when it went through American customs that it wiped the PLC with the X-ray scanner? ------------------------------------------------------------------------------------------ Split from S7 1200 CPU 1214C Error Led is Blinking.

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12/22/2021 11:17 AM	Rate (0)
Laser_man Member Joined: 9/10/2021 Last visit: 1/26/2023 Posts: 5 Rating: (0)	Hi Great observation, I hadn't spotted that :( Been doing some simulation tests here and I think you've cracked it as I can now reproduce the fault It looks like the PLC and expansion module shook apart slightly in transit icewind Laser_man Hi I built a Laser system built around a CPU 1212C. It was fully functionally tested in our factory and then dispatched to America. When our customer tried to use the laser there was problems. I did some diagnostics via Teamviewer which gave me some suspicions so got him to send a photo of the PLC and on receipt my fears were realised, the Red Error LED was flashing and no other LEDs on the PLC or expansion module (SM 1223) were lit Is it possible that when it went through American customs that it wiped the PLC with the X-ray scanner? ------------------------------------------------------------------------------------------ Split from S7 1200 CPU 1214C Error Led is Blinking. There is no power on the module! PLC may give the error because of not founding of module. Can you check the module connection to PLC. It seems seperated a little bit from Cpu.

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12/22/2021 2:57 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/22/2023 Posts: 13200 Rating: (2147)	That's one of the reasons my hardware designs include "stop blocks" on DIN-rail components. During the build, these end blocks get placed on each end of the PLC components, squeezed together, and tightened. This prevents the modules from shaking apart for the life of the system regardless of where the system is mounted. Very inexpensive warranty claim prevention. Laser_man Hi Great observation, I hadn't spotted that :( Been doing some simulation tests here and I think you've cracked it as I can now reproduce the fault It looks like the PLC and expansion module shook apart slightly in transit
	science guy
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