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Set coils M when start the plc

Created by: sinnaiG at: 7/25/2014 6:25 PM (9 Replies)

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7/25/2014 6:25 PM	Rate (0)
sinnaiG Bronze Member Joined: 7/20/2009 Last visit: 1/16/2024 Posts: 61 Rating: (3)	I have a NC contact to I1.0 and when i start the plc the M10.0 is always set. I reset the M10.0 close the plc, start again the plc and the M10.0 it is set! The contact it is always close... What is wrong? Any idea?

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7/28/2014 9:33 AM	Rate (0)
pratik7332 Bronze Member Joined: 11/26/2009 Last visit: 9/11/2024 Posts: 221 Rating: (1)	hi, Please look at the CPU properties , perticularly you can look at the clock memory.

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7/28/2014 9:57 AM	Rate (0)
Wizard Diamond Member Joined: 4/24/2006 Last visit: 10/3/2024 Posts: 8744 Rating: (1168)	Hello, Could it be, there is used OB100. (Start up OB) Best regards, Wizard

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7/28/2014 12:15 PM	Rate (0)
vipz Gold Member Joined: 9/2/2012 Last visit: 8/15/2024 Posts: 711 Rating: (30)	hai, check cross reference information of that memory adress. where it is used and how it is used .
	With Best Regards VIPZ
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8/2/2014 10:43 PM	Rate (0)
sinnaiG Bronze Member Joined: 7/20/2009 Last visit: 1/16/2024 Posts: 61 Rating: (3)	pratik7332what to check? Wizardi have an OB100 but i dont use the M10.0 anywhere in the project vipzi only use a reset of M10.0 and the contact of the M10.0. I dont have any other set of M10.0. Any other idea?

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8/2/2014 11:30 PM	Rate (0)
William_B Posts: 5225 Rating: (1192)	sinnaiG I have a NC contact to I1.0 and when i start the plc the M10.0 is always set. I reset the M10.0 close the plc, start again the plc and the M10.0 it is set! The contact it is always close... What is wrong? Any idea? Hi. Please make a hand sketch or screen capture of what you are explaining here. I am having difficulty to understand how I1.0 and M10.0 is linked. LATE NOTE.. please check the PLC hardware configuration under "System and Clock Memory" - anything set there? Thanks. w
William_B Posts: 5225 Rating: (1192)	Last edited by: William B. at: 8/2/2014 11:32 PM add late note
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8/3/2014 4:41 PM	Rate (0)
vipz Gold Member Joined: 9/2/2012 Last visit: 8/15/2024 Posts: 711 Rating: (30)	Hai,, can you please open cross reference screen, filter only memory. print it and attach here. or upload the program.
	With Best Regards VIPZ
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8/7/2014 7:44 PM	Rate (0)
sinnaiG Bronze Member Joined: 7/20/2009 Last visit: 1/16/2024 Posts: 61 Rating: (3)	I attach a photo of the connection of I1.0 and M10.0 I dont have the I1.0 or the M10.0 anyware else in the program. Attachment 2014-08-07_204034.jpg (140 Downloads)

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8/7/2014 8:20 PM	Rate (0)
William_B Posts: 5225 Rating: (1192)	Hi. Thank you for the picture. Please bare with me.. When writing the network in structured language it becomes.. [code]IF I1.0 = FALSE THEN M10.0 := TRUE; END_IF;[/code] Please could you try the following alternative networks: ...........................................................................................[1] I1.0 I1.0 M10.0 ---\| / \|----\| \|---------(S) and after testing do this one next.. where M1000.0 is any open memory bit ...........................................................................................[2] I1.0 M10.0 ---\| / \|------------\|----(S) \| \| M1000.0 \|----(S) If [1] still has M10.0 turn ON - then the M10.0 signal is switched on another M10.0 or MB10 or MW10 or MD10 or variations that include M10.0 bit. If [2] delivers M10.0 as ON and M1000.0 is ON means that I1.0 is OFF and will trigger the memory bit M10.0 to switch ON. I hope we can resolve this issue of yours. w
William_B Posts: 5225 Rating: (1192)
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8/7/2014 9:37 PM	Rate (1)
Marcjan Platinum Member Joined: 4/22/2010 Last visit: 5/3/2024 Posts: 5697 Rating: (715)	Hello, Did you or did you not check your System and clock memory bytes? This is why we asked multiple times. How can you avoid overwriting the flags that are allocated for system and clock memory bits in the user program? M-bits do not set themself, so it must be set by program, hardware settings like clock/systemmemory or HMI. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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This contribution was helpful to 1 thankful Users William_B

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