7/11/2019 10:02 AM | |
Joined: 10/18/2012 Last visit: 6/26/2024 Posts: 7 Rating:
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Hi, Sample program:http://support.automation.siemens.com/BR/view/en/68202723 for Modbus Master, uses data type "Data_for_Master" inside DB778 (Comm_Data) for every defined modbus slave that master talks to. Scenario: Master talks to 3 slaves.
For above comms, you need to define 6 "Master_Comm" arrays in DB778. As the buffer array size is fixed for all "Master_Comm[X]" instances in DB778 as per defined data type "Data_for_Master", how big to you make the buffer array in said data type? Also, how do you use buffer data in PLC program as the symbolic name is only buffer[1], buffer[2] etc? Is it possible to use static structured DB with user defined symbolic data names as per third party modbus manuals in place of the buffer arrays? Thanks Richard |
Last edited by: RichyR32GTR at: 07/11/2019 10:06:00 |
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10/14/2019 11:13 PM | |
Joined: 10/16/2017 Last visit: 4/24/2023 Posts: 1 Rating:
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Hello Denilson. It is posible download this program in an older version, v15 or v14? |
8/26/2020 2:32 PM | |
Joined: 6/1/2018 Last visit: 4/13/2024 Posts: 10 Rating:
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i had same problem and your answer was very usefull thank you so much............. |
10/11/2021 3:23 AM | |
Joined: 9/26/2011 Last visit: 2/5/2023 Posts: 10 Rating:
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Upgraded to V16
AttachmentS7-1500 Modubs RTU_V13_SP1_V16.zip (296 Downloads) |
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1 thankful Users |
10/11/2021 3:27 AM | |
Joined: 9/26/2011 Last visit: 2/5/2023 Posts: 10 Rating:
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Version upgraded to V16 AttachmentS7-1500 Modubs RTU_V13_SP1_V16.zip (318 Downloads) |
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