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Tips and sample program for MODBUS TCP

Created by: Denilson Pegaia at: 8/10/2011 3:05 PM (65 Replies)

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4/8/2016 11:23 AM	Rate (0)
AutoGen_2261571 Member Joined: 4/8/2016 Last visit: 4/12/2016 Posts: 1 Rating: (0)	how do you find that pbm i am also have same

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4/9/2016 8:58 AM	Rate (0)
Siemens sumit Regular Member Joined: 5/8/2014 Last visit: 5/29/2019 Posts: 4 Rating: (2)	Please find attached sample for V4.1 CPUs. for MODTCP communication. Attachment sample V4 MOD TCP.zip (425 Downloads)

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This contribution was helpful to 1 thankful Users Vivek Kansara

4/22/2016 1:27 PM
aleks_moraliks Regular Member Joined: 4/30/2015 Last visit: 6/19/2019 Posts: 1 Rating: (0)	Огромное спасибо за пример, очень помог! -------------------------------------------------------------------------------- Translation by moderator: Many thanls for examples, was very helpful!
	Last edited by: Min_Moderator at: 4/22/2016 3:27:33 PM Translation
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4/18/2017 12:19 PM	Rate (0)
Oana123 Member Joined: 2/24/2017 Last visit: 4/24/2017 Posts: 2 Rating: (0)	Hello all, I tried testing the provided Modbus TCP Client sample in a communication with a SCADA application (PcVue). I only changed the CPU type (to 1214C), server IP and PLC IP and it doesn't work. I receive the status 7002 at the read and write blocks and the connection is not established at the SCADA level. Do you have any suggestions on how I can make this work? Thank you very much, Oana

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4/23/2017 1:20 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 6/12/2019 Posts: 3732 Rating: (996)	Hi, normally, when you comunicate a S7-1200 with a SCADA system, the S-1200 plays the rule of "MODBUS Server" and the SCADA plays the rule of "MODBUS Client". In this context I suggest you use Modbus server instruction and set the ative partner for connection stabelishimet as SCACA.
	Denilson Pegaia Siemens Industry Sector Technical Support
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4/28/2018 3:39 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 6/12/2019 Posts: 3732 Rating: (996)	Hi, Here there are a V15 version of a demonstration program and casts showing about how it was created. The project uses S7-1500 (but the configuration is similar to S7-1200). The use of S7-1500 has the advantage to be simulated in PLCSIM Advanced. Attachment MODBUS.zip (190 Downloads)
	Denilson Pegaia Siemens Industry Sector Technical Support
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5/2/2018 6:35 PM	Rate (0)
king of pain Member Joined: 4/16/2018 Last visit: 4/9/2019 Posts: 1 Rating: (0)	Do you have any project with v14 ? thanks a lot....

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7/20/2018 7:37 PM	Rate (0)
lost_alone Advanced Member Joined: 8/24/2011 Last visit: 6/3/2019 Posts: 40 Rating: (0)	Hi everyone, I made some tests using the examples provided by Mr,Pegaia, and works perfect. Now my Project uses around 45 nodes, that does not need to be read at the same time. My idea is to use logic to open, read and close each connection. But, to avoid problems, i want to know which cpu i need to use. my idea is a 1511 or something like that Also, where can i find the information about the number of connections using modbus tcp protocol. l checked the technical data, but I do not founded this information ... Thanks in advance

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7/20/2018 8:06 PM	Rate (0)
huggy_d1 Diamond Expert Joined: 7/7/2010 Last visit: 6/20/2019 Posts: 7647 Rating: (1266)	The s7-1500 manual ( https://support.industry.siemens.com/cs/ww/de/view/86140384 ) section 11.1 (around page 228) talks about maximum available connection resources. jorge.funke Hi everyone, I made some tests using the examples provided by Mr,Pegaia, and works perfect. Now my Project uses around 45 nodes, that does not need to be read at the same time. My idea is to use logic to open, read and close each connection. But, to avoid problems, i want to know which cpu i need to use. my idea is a 1511 or something like that Also, where can i find the information about the number of connections using modbus tcp protocol. l checked the technical data, but I do not founded this information ... Thanks in advance
	Last edited by: Jen_Moderator at: 7/23/2018 9:57:43 AM Optimized link. Helpful? Rate it. Solved? Post it.
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This contribution was helpful to 1 thankful Users lost_alone

7/21/2018 5:32 AM	Rate (0)
lost_alone Advanced Member Joined: 8/24/2011 Last visit: 6/3/2019 Posts: 40 Rating: (0)	hi, This link in generating error 404 to me...

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