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Should the Modbus library also be updated to V11 before it can be used ?

6/16/2011 5:37 PM	Rate (0)
mvicc Regular Member Joined: 11/25/2010 Last visit: 5/22/2024 Posts: 1 Rating: (0)	Hello, I'm facing similar problemswith the modbus library. The lib is missing after iupgraded from V10.5 to V11 professional. Should the Modbuslibrary also be updatedto V11before it can be used ?? Greetz, Marc Splitted from TIA v10.5 nad V11 Problem.
	Last edited by: O_Moderator at: 6/17/2011 11:59 AM new subject after splitting
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6/25/2011 8:13 PM	Rate (0)
jklm Platinum Member Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309)	Hello, From the system manual: Modbus communication There are two versions of the Modbus instructions available in STEP 7: ● Version 1 was initially available in STEP 7 Basic V10.5. ● Version 2 is available in STEP 7 Basic/Professional V11. The version 2 design adds REQ and DONE parameters to MB_COMM_LOAD. Also, the MB_ADDR parameter for MB_MASTER and MB_SLAVE now allows a UInt value for extended addressing. For compatibility and ease of migration, you can choose which instruction version to insert into your user program. Do not use both 1.x and 2.y instruction versions in the same CPU program.
	Best regards jklm Suggestion was helpful? Feel free to rate it.
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