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SINUMERIK 840D ALARM

Created by: CHANDRU at: 5/19/2009 9:58 AM (9 Replies)

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5/19/2009 9:58 AM	Rate (0)
CHANDRU Posts: 11 Rating: (0)	WE ARE GETTING THE FOLLOWING ALARM IN OUR 840D CONTROL ANY HELP. THANKS, CHANDRU 120202 Wait for connection to NC/PLC
CHANDRU Posts: 11 Rating: (0)	Last edited by: CHANDRU at: 5/19/2009 9:59 AM
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5/19/2009 12:20 PM	Rate (0)
tranksim Posts: 2 Rating: (0)	Can you give more details, in what context was the alarm? Have you tried a reset, the procedure of Start-up guide Sinumerik 840D "PLC general reset" and "NCK general reset"?
tranksim Posts: 2 Rating: (0)
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5/19/2009 1:20 PM	Rate (0)
RAM81 Silver Member Joined: 3/3/2008 Last visit: 10/5/2023 Posts: 333 Rating: (51)	what is the status of the led's on the NCU card

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5/19/2009 2:47 PM	Rate (0)
OvidiuNastac Silver Member Joined: 1/29/2008 Last visit: 7/26/2022 Posts: 419 Rating: (19)	Hi Usualy this alarm occures when is no conection betwen MCP and NCK and/or PLC (trought the serial bus). Cause of this allarm may be :wire breakage, faulty address or data transfer configuration of one of the bus nodes. If it's a functional machine the most probable cause is the wire breakage. If it's a new machine check the bus configuration or try to establisch the cause troughStep 7hardware diagnostic. Good luck Nit

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5/19/2009 3:52 PM	Rate (0)
Gebhardt Karl Platinum Expert Joined: 7/16/2006 Last visit: 1/2/2024 Posts: 1502 Rating: (176)	Hi Tell us the LED from the NCK-Unit. (NCU) Which LED are on, of, switched. I think the battery isemty and NCK and PLC-Data you have lose.
	Karl
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5/25/2009 4:34 PM	Rate (0)
phgo Advanced Member Joined: 5/22/2009 Last visit: 5/3/2022 Posts: 40 Rating: (0)	Hello I think there is a alarm when the battery is empty ! 2100 NCK battery warning threshold reached 2101 NCK battery alarm 2102 NCK battery alarm I have a customer whith the same alarm and they say me the solution was a general reset with the rotary switch , and reload the arc file they haved the problem2 times in 3 months, after the first time they exange the cpu with a similar machine without succes I suspect a voltage drop on the 24 vdc on theMCP but difficult to check
	Last edited by: phgo at: 5/26/2009 1:41 AM
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5/26/2009 1:43 AM	Rate (0)
phgo Advanced Member Joined: 5/22/2009 Last visit: 5/3/2022 Posts: 40 Rating: (0)	there is a similar threat : 840D error 120202 Wait for connection to NC/PLC

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7/19/2010 3:46 PM	Rate (0)
HenryCold Member Joined: 3/21/2008 Last visit: 12/6/2024 Posts: 6 Rating: (0)	Hello, we have similar problem. Control reports errors 2101 NCK battery alarm 2102 NCK battery alarm The batterry is OK and changed with new one. NCK urlesh have no effect to this message. It seem to be some problem at NCU or NCU box or E/R power supply.

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7/19/2010 4:20 PM	Rate (0)
Ekalavya Posts: 2964 Rating: (484)	Hello.... Have you inserted the battery properly? try to clear the NC-PLC again load the backup. > After loading the backup if NCU comes to the healthy condition then it OK. > or It could be problem with the NCU box I am attaching you the steps which is present in DOCON WEB for the reference. Check it out... Rgds, Attachment battery replacement.pdf (810 Downloads)
Ekalavya Posts: 2964 Rating: (484)
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7/26/2010 9:30 PM	Rate (0)
Giovanni-moguez Posts: 3 Rating: (0)	when the network cable is connected when the network system use a static IP-address instead of an dynamic address setting on the PCU cause also this alarm. its because the Windows OS waits for a response of the DHCP and take to much CPU-power so the HMI-software is unable to connect within the time-out setting. maybe it will help you.
Giovanni-moguez Posts: 3 Rating: (0)
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