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STL Load -> Transfer

Created by: Cherymax at: 8/5/2009 9:43 PM (8 Replies)

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8/5/2009 9:43 PM	Rate (0)
Cherymax Posts: 12 Rating: (0)	Hi, Can someone please tell me the correct (most accepted) wayto transfer MD50 in to DB7.DBD77 and DB9.DBD99? I'm guessing it's example 3 but I'm no expert in STL Example 1 A M1.1 L MD50 T DB7.DBD77 T DB9.DBD99 Example 2 A M1.1 L MD50 T DB7.DBD77 L MD50 T DB9.DBD99 Example 3 A M1.1 L MD50 T DB7.DBD77 A M1.1 L MD50 T DB9.DBD99 Thanks in advance, Cherymax
Cherymax Posts: 12 Rating: (0)
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8/6/2009 2:55 AM	Rate (3)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 10/11/2024 Posts: 3024 Rating: (1054)	Hello Cherymax This way, if you want to do it unconditionally: [code]L MD50 // load MD50 value into accu1 T DB7.DBD77 // transfer accu1 to DB7.DBD77 T DB9.DBD99 // transfer accu1 to DB9.DBD99 [/code] and this way if you want to do it conditionally (e.g. only if M1.1 is "1"): [code]A M 1.1// IF M 1.1 is ON JCN JUMP //THEN:(note: could also use JNB) L MD50 // load MD50 value into accu1 T DB7.DBD77 // transfer accu1 to DB7.DBD77 T DB9.DBD99 // transfer accu1 to DB9.DBD99 JUMP: xyz // logic continues here [/code] Alternatively, do this in LAD or FBD and use the MOVE instruction I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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8/6/2009 7:44 AM	Rate (1)
Bhaskaran Posts: 107 Rating: (13)	Cherymax Hi, Can someone please tell me the correct (most accepted) wayto transfer MD50 in to DB7.DBD77 and DB9.DBD99? I'm guessing it's example 3 but I'm no expert in STL Example 1 A M1.1 L MD50 T DB7.DBD77 T DB9.DBD99 Example 2 A M1.1 L MD50 T DB7.DBD77 L MD50 T DB9.DBD99 Example 3 A M1.1 L MD50 T DB7.DBD77 A M1.1 L MD50 T DB9.DBD99 Thanks in advance, Cherymax All the three examples will work. You don't need to have "A M 1.1" in front. The example 1 is the effecient way of transferring the values since it has one load instruction less.
Bhaskaran Posts: 107 Rating: (13)
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8/6/2009 6:34 PM	Rate (0)
Sydney Gold Member Joined: 1/4/2008 Last visit: 9/26/2024 Posts: 703 Rating: (96)	Hello Cherymax, can you please specify which type of PLC you speak about? Solution which Fritz suggested is for Step 7 (PLCs S7-300 or S7-400) where the load and transfer instructions doesn't depend on the RLO, don't know S7-200 language but think there these instructions does depend on something and maybe you speak about S5? Regards Sydney

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8/6/2009 7:31 PM	Rate (0)
Cherymax Posts: 12 Rating: (0)	It's a S7-300 315-2DP...
Cherymax Posts: 12 Rating: (0)
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8/6/2009 8:17 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (999)	Sydney ...and maybe you speak about S5? Regards Sydney "T DB7.DBD77" is not possible at S5.
IBN-Service Posts: 8946 Rating: (999)
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8/6/2009 10:40 PM	Rate (0)
Sydney Gold Member Joined: 1/4/2008 Last visit: 9/26/2024 Posts: 703 Rating: (96)	Yes, although I'm not used to program these old PLCs, know a datablock have to be opened first and then accessed in the S5, it was just tricky question we're in the Industrial Software conference so it would be better to specify what the question belongs to. Regards Sydney
	Last edited by: Sydney at: 8/6/2009 10:45 PM
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8/7/2009 9:24 AM	Rate (0)
IBN-Service Posts: 8946 Rating: (999)	Sydney Yes, although I'm not used to program these old PLCs, know a datablock have to be opened first and then accessed in the S5, it was just tricky question we're in the Industrial Software conference so it would be better to specify what the question belongs to. Regards Sydney Basicly you are right. But some users already understand the question very well and give a good answer. So your additional comment does not seem so very usefull but may be increase some mess?
IBN-Service Posts: 8946 Rating: (999)
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12/4/2018 12:02 PM	Rate (0)
NirajBond Posts: 2 Rating: (0)	fritz Hello Cherymax This way, if you want to do it unconditionally: [code]L MD50 // load MD50 value into accu1 T DB7.DBD77 // transfer accu1 to DB7.DBD77 T DB9.DBD99 // transfer accu1 to DB9.DBD99 [/code] and this way if you want to do it conditionally (e.g. only if M1.1 is "1"): [code]A M 1.1// IF M 1.1 is ON JCN JUMP //THEN:(note: could also use JNB) L MD50 // load MD50 value into accu1 T DB7.DBD77 // transfer accu1 to DB7.DBD77 T DB9.DBD99 // transfer accu1 to DB9.DBD99 JUMP: xyz // logic continues here [/code] Alternatively, do this in LAD or FBD and use the MOVE instruction I hope this helps Yes It is working Thanks
NirajBond Posts: 2 Rating: (0)
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