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modbus communication to s7 200

Created by: murukesh at: 9/2/2011 8:12 AM (10 Replies)

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9/2/2011 8:12 AM	Rate (0)
murukesh Experienced Member Joined: 4/30/2010 Last visit: 10/24/2024 Posts: 43 Rating: (0)	hi i have cpu s7-226 CN, i have eurotherm meter also.how to read data from eurotherm meter to plc through modbus communication what are the procedures for it .i am using v4.0 step 7 micowin sp8
	Last edited by: murukesh at: 9/2/2011 8:13 AM Last edited by: murukesh at: 9/2/2011 8:12 AM
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9/2/2011 9:24 AM	Rate (1)
umencho Diamond Member Joined: 3/21/2006 Last visit: 3/30/2025 Posts: 10239 Rating: (1183)	Hello, Perhaps might helps - How do you implement MODBUS communication with S7-200? Best regards, Hristo MIhalev

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This contribution was helpful to 1 thankful Users murukesh

9/2/2011 4:14 PM	Rate (0)
murukesh Experienced Member Joined: 4/30/2010 Last visit: 10/24/2024 Posts: 43 Rating: (0)	hi From where should i get modbus library.please send the link for modbus library
	Last edited by: murukesh at: 9/2/2011 4:15 PM
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9/3/2011 6:23 AM	Rate (1)
Amit_86 Platinum Member Joined: 3/18/2008 Last visit: 12/8/2023 Posts: 1750 Rating: (272)	murukesh hi From where should i get modbus library.please send the link for modbus library Dear Murukesh, please contact your local Siemens reprenstative to get Modbus library.
	VANDE MATARAM.....
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9/4/2011 6:00 PM	Rate (0)
murukesh Experienced Member Joined: 4/30/2010 Last visit: 10/24/2024 Posts: 43 Rating: (0)	hi, i have connected hmi through rs485 in port1 of cpu226CN and hmi is reading the data from plc ,can i connect EUROTHERM meter through rs 485 to port 0 is it possible ?is it possible for cpu to read data from meter through port 0?
	Last edited by: murukesh at: 9/4/2011 9:01 PM Last edited by: murukesh at: 9/4/2011 8:38 PM
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9/5/2011 8:10 AM	Rate (0)
Greg_E Posts: 88 Rating: (2)	Hi murukesh, 1) Of course it will if you did the right configuration for both devices i.e modbus, PPI/MPI. 2) Which communication protocol does talk your meter, if it's modbus you have to configure your port0 as modbus master and set apropriate parametrs. Hope it will help. Best Regards, Greg.
Greg_E Posts: 88 Rating: (2)
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9/5/2011 9:28 AM	Rate (0)
murukesh Experienced Member Joined: 4/30/2010 Last visit: 10/24/2024 Posts: 43 Rating: (0)	hi in modbus ctrl block has to enable , i have given always on bit SM0.0 for it then also the block is not getting enabled ihave attached the screen shot of it
	Last edited by: murukesh at: 9/5/2011 10:23 AM
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9/6/2011 7:18 AM	Rate (0)
Greg_E Posts: 88 Rating: (2)	Hi murukesh, no you didn't, attach it again. Regards.
Greg_E Posts: 88 Rating: (2)
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9/8/2011 6:16 AM	Rate (0)
murukesh Experienced Member Joined: 4/30/2010 Last visit: 10/24/2024 Posts: 43 Rating: (0)	hi how to read and write data from erotherm meter through modbus msg and where it will diplay that value in plc
	Last edited by: murukesh at: 9/8/2011 7:09 AM
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9/8/2011 8:42 AM	Rate (0)
Greg_E Posts: 88 Rating: (2)	Hi murukesh, The easiest way is to read the manual. Slave- slave ID #. RW - read=0 write=1 addr - slaves registers/bits count - the amount of registers/bits. dataptr - where should the master store the read value or where should master take data from(&VBXXX). But first of all check the modbus parameters as BD, ID, Stop bit, data bits etc. and configure apropriate in your S7-200. Good luck, Best Regards, Greg.
Greg_E Posts: 88 Rating: (2)
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