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Indirect Addressing in S7-300

Created by: Saradhi at: 5/4/2012 5:28 PM (40 Replies)

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5/4/2012 5:28 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	Hi all, In my plc i'm having some values like MB0 --- 1 MB1 --- 2 MB2 --- 3 MB3 --- 4 MB4 --- 5 MB5 --- 6 MB6 --- 7 MB7 --- 8 MB8 --- 9 MB9 --- 10 i want to move the values to another register like mb100 as if counter value is 1 mb0 ---------- mb100 counter value is 2 mb1 ---------- mb100 counter value is 3 mb2 ---------- mb100 counter value is 4 mb3 ---------- mb100 counter value is 5 mb4 ---------- mb100 counter value is 6 mb5 ---------- mb100 counter value is 7 mb6 ---------- mb100 counter value is 8 mb7 ---------- mb100 counter value is 9 mb8 ---------- mb100 counter value is 10 mb9 ---------- mb100 by using indirect addressing. i can achieve this in s7-200 but i didn't find solution in s7-300. PLEASE help me regarding this.

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5/4/2012 5:32 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	look for the [xxx] option. dark and dirty example: l mb999 sld 3 ttempDWord l mb888 t mb[tempDWord]
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 5:35 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	Can you please elaborate

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5/4/2012 5:48 PM	Rate (1)
IBN-Service Posts: 8946 Rating: (989)	Please have a look at the attach. It is already the function you need. TempAdressPointer is a temporary variable DWORD. the "[ ]" are the rectangular bracket! Attachment indirect.jpg (547 Downloads)
IBN-Service Posts: 8946 Rating: (989)
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This contribution was helpful to 2 thankful Users miami hdhosseini

5/4/2012 6:32 PM	Rate (0)
miami Platinum Member Joined: 8/31/2005 Last visit: 2/24/2021 Posts: 2071 Rating: (293)	This is called "Memory Indirect Addressing" Use this if you search for details

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5/4/2012 6:52 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	It is working if i want to move blkmov what i need to do ? what is sld 3
	Last edited by: Saradhi at: 5/4/2012 6:53 PM Last edited by: Saradhi at: 5/4/2012 6:53 PM
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5/4/2012 6:58 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi what is sld 3 You need SLD3 (Shift Doubleword Left 3 digits) because a Pointer tips to a BIT, not a Byte. So the BIT - Number must be masked by "0.0" That is done with SLD3.
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 7:03 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	how to call db's

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5/4/2012 7:05 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi how to call db's Can you please elaborate?
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 7:08 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	the above requirement only but instead of mb's i want use some range in db. that is db1.dbb0 ------ db1.dbb10 above values copied to mb0 ---- mb10

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5/4/2012 7:11 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi the above requirement only but instead of mb's i want use some range in db. that is db1.dbb0 ------ db1.dbb10 above values copied to mb0 ---- mb10 Just replace L MB [#TempAdressPointer] with OPN DB 1 L DBB [#TempAdressPointer]
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 7:11 PM	Rate (0)
Aret Posts: 2348 Rating: (248)	OPN DB1 L DBB[#byte_num] T DBB10
Aret Posts: 2348 Rating: (248)	Last edited by: Aret at: 5/4/2012 7:11 PM
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5/4/2012 7:18 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Aret OPN DB1 L DBB[#byte_num] T DBB10 Thank you, Aret, but what was wrong with my answer?
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 7:22 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	your code perfectly executing. if i want to range of values db1.dbb0 ---- db1.dbb10 to mb0 --- mb10
	Last edited by: Saradhi at: 5/4/2012 7:23 PM
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5/4/2012 7:27 PM	Rate (0)
Aret Posts: 2348 Rating: (248)	Nothing IBN-Service - 5/4/2012, 7:11 PM Aret - 5/4/2012, 7:11 PM I just shut the window when i posted the reply without waiting for thread return The further we go the more interesting it looks CALL BLKMOV SCRBLK := P#DB1.DBX0.0 BYTE 11 DSTBLK := P#M0.0 BYTE 11
Aret Posts: 2348 Rating: (248)
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5/4/2012 7:34 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	L #count SLD 3 T #temp OPN DB 1 L DBB [#temp] T MB 100 this is my code, where i need to insert blkmov

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5/4/2012 7:36 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi L #count SLD 3 T #temp OPN DB 1 L DBB [#temp] T MB 100 this is my code, where i need to insert blkmov BLKMOV (SFC20) makes sense if you like to move a complete block, have a look at Aret's example! If you only like to write a single byte (or word or doubleword), it is easier to use the T instruction instead of SFC20.
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 7:43 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	L #count SLD 3 T #temp OPN DB 1 L DBB [#temp] T MB 100 the above code is only moving single byte to another byte. if i want to move bulk amount of data. inculde the steps please with the above code

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5/4/2012 7:48 PM	Rate (1)
IBN-Service Posts: 8946 Rating: (989)	Please have a look at Aret's code up there. Than have a look to the ANY - pointer Format. May be, attached example will help you also.
IBN-Service Posts: 8946 Rating: (989)	Last edited by: IBN-Service at: 5/5/2012 1:05 PM Please find new example in later post
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5/4/2012 7:50 PM	Rate (0)
playerslight Posts: 1064 Rating: (71)	Your datacopy works well ,just have to learn germlish
playerslight Posts: 1064 Rating: (71)
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5/4/2012 7:55 PM
IBN-Service Posts: 8946 Rating: (989)	playerslight Your datacopy works well ,just have to learn germlish "Speak german or die" I just translate the comments but not the operand names...
IBN-Service Posts: 8946 Rating: (989)	Last edited by: IBN-Service at: 5/4/2012 7:57 PM
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5/4/2012 7:59 PM
playerslight Posts: 1064 Rating: (71)	I amgood at germlish ,our lead engineer uses it all the time ,starting to learn german
playerslight Posts: 1064 Rating: (71)
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5/4/2012 8:01 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	the file is not opening

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5/4/2012 8:03 PM	Rate (0)
playerslight Posts: 1064 Rating: (71)	you need to openit as a source file
playerslight Posts: 1064 Rating: (71)
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5/4/2012 8:04 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi the file is not opening It is a ZIP. You first have to Unzip. Then you got an .AWL File. You Load the .AWL File with "Sources" into S7 - Manager, then you can translate to S7 - FC Block.
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 8:33 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	i can understand little bit from the source file. if possible post a image of the program

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5/4/2012 8:46 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi i can understand little bit from the source file. if possible post a image of the program It will be much more easy for you to use the "Source - Import external Source" Funktion....
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 9:05 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	after importing source file, what i have to do ?

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5/4/2012 9:12 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi after importing source file, what i have to do ? Press the "compile" button. See attach. FC710 will included in your program folder. Sorry! In the source, one bracket wath missing! "(", please type it again! Attachment lookatme.jpg (151 Downloads)
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 9:13 PM	Rate (0)
playerslight Posts: 1064 Rating: (71)	either right click on the file and compile or highlight and cntl and b to compile .then it will be in your project as fc 710
playerslight Posts: 1064 Rating: (71)	Last edited by: playerslight at: 5/4/2012 9:15 PM
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5/4/2012 9:18 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	PLEASE check this code L MD 0 SLD 3 T MD 4 OPN DB 1 L DBB [MD 4] T MB 100 when md0 is 10 cpu going into stop mode. why it was happend ?

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5/4/2012 9:19 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Findthe block as a Step7 Project already compiled as attach... Usually, support like this is not free of charge... Attachment Saradhi.zip (71 Downloads)
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 9:20 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi when md0 is 10 cpu going into stop mode. why it was happend ? It seems that your Datablock is to short...?
IBN-Service Posts: 8946 Rating: (989)
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5/4/2012 9:41 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	Thank you for all

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5/4/2012 9:42 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (989)	Saradhi Thank you for all You are welcome!
IBN-Service Posts: 8946 Rating: (989)
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This contribution was helpful to 1 thankful Users playerslight

5/4/2012 10:07 PM
playerslight Posts: 1064 Rating: (71)	Be gentle on your bill
playerslight Posts: 1064 Rating: (71)	Last edited by: playerslight at: 5/4/2012 10:09 PM
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5/5/2012 9:26 AM
IBN-Service Posts: 8946 Rating: (989)	playerslight Be gentle on your bill Nightshift need payed extra charge! (just kidding)
IBN-Service Posts: 8946 Rating: (989)
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5/5/2012 9:32 AM
playerslight Posts: 1064 Rating: (71)	i know what you mean it's 3:30 in the morning now
playerslight Posts: 1064 Rating: (71)
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5/11/2012 12:46 PM	Rate (0)
List Silver Member Joined: 12/16/2011 Last visit: 9/1/2020 Posts: 664 Rating: (16)	Hai Saradhi, What help you need from me?? If you Asking about SLD3: Eg:) I consider the same example that i have given to another Thread, L 100 SLD3 LAR1 L PIW[AR1,P#0.0] T MW10 L 100 : Loading constant Value for pointing option eg: 100 mens in binary --1100100 SLD3 : Shifting duble word Left 3 bit ,, means, 1100100_000 means in dec 800 LAR1 : Load Address reg1 from Accu1; means the Value 800 L PIW[AR1,P#0.0] ; Pointing the 800th bit as a pointer value How you get the 800th bit : You just open Microsoft Excel and develop like below, Byte00 - 0 1 2 3 4 5 6 7 Byte01 - 8 9 10 11 12 13 14 15 .......................................................... . . . Byte100 - 800 801 802 803 804 805 806 807 . . . Ultimately 800th bit is the Starting bit of Byte100.!!!!!! This is the concept of SLD3 / Pointer...!!! Just Try with this for your develoment... Thanks & Regards Raj
	"I have not failed. I’ve just found 10,000 ways that won’t work" - Edison
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5/11/2012 12:52 PM	Rate (0)
Saradhi Bronze Member Joined: 5/11/2011 Last visit: 9/11/2018 Posts: 303 Rating: (2)	Please refer this /tf/WW/en/Posts/74265#top

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1/9/2016 8:55 AM	Rate (0)
CS Moderator Moderator Joined: 9/1/2005 Last visit: 2/26/2021 Posts: 3957 Rating: (187)	New question published by downloading softwares is split to a separate thread with the subject no I address and Q address was found in the program. Best regards CS Moderator

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