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problem in getting ouptput signal from digital ouput card

Created by: Monal at: 5/16/2012 9:12 AM (26 Replies)

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5/16/2012 9:12 AM	Rate (0)
Monal Posts: 14 Rating: (0)	hello Tech Team, i am new user to siemens S7300 series PLC'S. i am testing a simple and, or logic program.i have downloaded the program to my CPU 315-2DP,using Input card SM321 DI 3224VDC (1P 6ES7 321-1BL00-0AA0) ,and Output Card SM322 DO 1624VDC/0.5A (1P 6ES7-1BH01-0AA0).I amhaving problem in getting an output signal from it.when i press the swtiches the input indicators on DI card shows indication that input is on(LED's on card glows)but there is no indication on output card.i have useda LED as an output indicator.indicator led on card shows nothing nor the output LED glows.what would be the problem i am attaching the program image,which i have made in S7.and i have monitor the program using S7 monitor function as instructed in its manual working with S7lite.program runs but i am not getting ouput signal at my output card. Attachment prgram 1 and,or logic.JPG (426 Downloads)
Monal Posts: 14 Rating: (0)
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5/16/2012 9:17 AM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 10/17/2024 Posts: 5697 Rating: (715)	Hello, Connected powersupply to card? Are you sure you use the right adresses? Check in your hardware config. 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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5/16/2012 9:21 AM	Rate (1)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 11/5/2024 Posts: 2957 Rating: (242)	Monal ... the output LED glows.. I'm nearly sure that it is wrong wiring. Please look at the module manual for wiring. Find you modules in thi manual SIMATIC S7-300 S7-300 Automation System Module Data and see how to wire correctly/.
	Best regards, Darius
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5/16/2012 10:19 AM	Rate (0)
Monal Posts: 14 Rating: (0)	hello Sir i amattaching my program file.i am giving 24 VDC tomy digital input card I0.4 and I0.5 but i am notgetting any outputfrom output card at Q4.2.and not getting any indications on output card.i have checked my programe acordingto S7 manual page no 134-136 of working with S7 lite (performing aprogram test run with program status ). Attachment 313cpu.zip (418 Downloads)
Monal Posts: 14 Rating: (0)
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5/16/2012 10:20 AM	Rate (0)
eng_semsem Experienced Member Joined: 5/1/2009 Last visit: 5/23/2021 Posts: 144 Rating: (1)	Hello 1- open variable table and write your i/p and o/p as attachment file then go to online and see you i/p and o/p states if it work as you need so please PDF file and reconnect your hard word power supply and if does not work 1- be sure you down load OB 2-Download your program with a diffrent i/p o/p 3-clean your PLC from any FB or FC and download your program again Attachment Desktop.zip (423 Downloads)
	Best regard Osama
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5/16/2012 10:23 AM	Rate (0)
AMAZINGAHMED Gold Member Joined: 8/27/2006 Last visit: 10/22/2024 Posts: 719 Rating: (88)	Monal hello Sir i amattaching my program file.i am giving 24 VDC tomy digital input card I0.4 and I0.5 but i am notgetting any outputfrom output card at Q4.2.and not getting any indications on output card.i have checked my programe acordingto S7 manual page no 134-136 of working with S7 lite (performing aprogram test run with program status ). Like Darius said, this is probably a wiring problem. Make sure you connected 24V DC and 0V DC to your output card as well as supplying 0V DC to your input card. Same 0V DC must be on both cards.
	The more you know, The more you know that you don't know
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5/16/2012 10:31 AM	Rate (0)
manmeet Gold Member Joined: 1/3/2006 Last visit: 2/19/2024 Posts: 726 Rating: (71)	Hi Above two mentioned reasons by Darius and Marcjan are most likely scenario. Third reason cab be your logic in some other n/w of FC or FB is resetting output.

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5/16/2012 10:34 AM	Rate (1)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 11/5/2024 Posts: 2957 Rating: (242)	Glowing LED tells me a secret that it is not a program fault....
	Best regards, Darius
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5/16/2012 11:30 AM	Rate (0)
manmeet Gold Member Joined: 1/3/2006 Last visit: 2/19/2024 Posts: 726 Rating: (71)	Monal But there is no indication on output card.i have useda LED as an output indicator.indicator led on card shows nothing nor the output LED glows.what would be the problem Darius as per above quote LED is not glowing !!

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5/16/2012 11:44 AM	Rate (0)
eng_semsem Experienced Member Joined: 5/1/2009 Last visit: 5/23/2021 Posts: 144 Rating: (1)	Makevariable table and write your i/p and o/p then goto online and see your i/p and o/p states and please tell me what you see?
	Best regard Osama
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