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S7-300 Memory Maping

3/12/2014 10:33 PM	Rate (0)
Tomy Master Gold Member Joined: 5/4/2009 Last visit: 11/23/2024 Posts: 914 Rating: (40)	Dear friends, Currently, I am working on connecting CPU314C-2PN/DP as slave on ModBus TCP. My question is how we can map memory areas (such as I, Q, M, DB.B, DB.W etc...) to memory areas of Modbus? If there is a document describing this I would be more than greatful. Thank you in advance. Tomy
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3/13/2014 7:46 AM	Rate (0)
Saggy Silver Member Joined: 11/8/2011 Last visit: 3/7/2025 Posts: 387 Rating: (43)	Tomy Master Dear friends, Currently, I am working on connecting CPU314C-2PN/DP as slave on ModBus TCP. My question is how we can map memory areas (such as I, Q, M, DB.B, DB.W etc...) to memory areas of Modbus? If there is a document describing this I would be more than greatful. Thank you in advance. Tomy Hi Tomy Please have look on this Modbus Communication Hope this helps

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This contribution was helpful to 1 thankful Users Tomy Master

3/13/2014 7:50 AM	Rate (0)
Marcjan Platinum Member Joined: 4/22/2010 Last visit: 2/26/2025 Posts: 5697 Rating: (716)	Hello, Perhaps this is usefull too : SIMATIC S7-300/S7-400 Loadable Driver for Point-to-Point CPs: MODBUS Protocol, RTU format, S7 is Slave Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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This contribution was helpful to 1 thankful Users Saggy

3/13/2014 10:32 AM	Rate (0)
Tomy Master Gold Member Joined: 5/4/2009 Last visit: 11/23/2024 Posts: 914 Rating: (40)	Dear friends, First, I would like to thank you but is it the same for ModBus on TCP????? If there was a documentation I will be more than greatfull. Regards. Tomy.
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3/13/2014 10:40 AM	Rate (1)
Marcjan Platinum Member Joined: 4/22/2010 Last visit: 2/26/2025 Posts: 5697 Rating: (716)	Hello, sorry i overlooked the TCP I hope there is some information in: How do you use the blocks for MODBUS/TCP communication over the integrated PROFINET interface of the S7-300 and S7-400 CPUs and IM151-8 PN/DP CPU in STEP 7 Professional (TIA Portal)? Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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