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&VB1000 and &VB7000

Created by: EBM101 at: 5/27/2021 7:23 AM (5 Replies)

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5/27/2021 7:23 AM	Rate (0)
EBM101 Experienced Member Joined: 1/18/2020 Last visit: 7/2/2022 Posts: 53 Rating: (0)	Hi Experts, What are the equivalent conversion for S7-200 PLC Address "&VB1000" and "&VB7000"? I check on the cross-reference in the program and these addresses were only used on the network as shown below.

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5/27/2021 7:40 AM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 10/17/2024 Posts: 5697 Rating: (715)	Hello, Hard to say without the program, my guess is some HMI connected or communication module. Regards, Ooops overlooked the & Marcjan
	Last edited by: Marcjan at: 05/27/2021 14:23:12 Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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5/27/2021 8:14 AM	Rate (0)
qwazee Platinum Member Joined: 3/30/2020 Last visit: 11/11/2024 Posts: 4941 Rating: (1010)	That is a pointer used for indirect addressing. I am 80% sure that the equivalent is going to be an array in the S7-1200. You will need to study how indirect addressing works in the S7-200 and understand how the mechanism works. Be on the lookout for the * and & symbols.
	Activities of this user is voluntary. There is no obligation or liability placed on this user. Though optional, your 'please' and 'thank you' is highly valued.
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This contribution was helpful to 1 thankful Users Duris_I

5/27/2021 8:20 AM	Rate (1)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 11/11/2024 Posts: 34181 Rating: (4258)	Where do you find a program example for indirect addressing for the S7-200?

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This contribution was helpful to 1 thankful Users qwazee

5/27/2021 8:41 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 11/11/2024 Posts: 34181 Rating: (4258)	If you have no manual then can you download it from here: S7-200 System Manual

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5/27/2021 1:39 PM	Rate (0)
Duris_I Diamond Expert Joined: 4/28/2015 Last visit: 10/30/2024 Posts: 10585 Rating: (825)	Hello, the reason to do this save memory address is probably pointer arithmetic f.ex. move pointer to saved addr+1 (looking to address Pointer+1) or also as qwazee mentioned (array example manipulation). It's very useful feature.
	With best regards... Ivan Duris Flight: OMICO
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