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S7-300 Modbus TCP/IP with third party via CP343-1

4/4/2024 1:07 PM	Rate (0)
anh232 Joined: 3/21/2023 Last visit: 5/10/2025 Posts: 4 Rating: (0)	Dear experts, I have CPU 315-2DP (6ES7 315-2AG10-0AB0) firmware 2.0 and CP343-1 (6GK7 343-1EX11-0XE0) firmware V2.0. I want to comunicate CPU315-2 DP to DCS in Modbus TCP/IP via CP343-1. With the version of the CPU315-2DP how can I download library of Modbus TCP/IP FB Blocks (FB108 MODBUS CP; FB107 MB_CBSRV, FB106 MB_CPCLI) and Modbus_TCP_CP_EXAMPLE files.

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4/4/2024 1:40 PM	Rate (1)
Wüstenräuber Gold Expert Joined: 10/3/2008 Last visit: 10/22/2025 Posts: 996 Rating: (129)	Hi, the old CP 1EX11 is not supported: https://support.industry.siemens.com/cs/ww/en/view/104946406 Wüstenräuber

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4/5/2024 5:07 AM	Rate (0)
anh232 Joined: 3/21/2023 Last visit: 5/10/2025 Posts: 4 Rating: (0)	Dear experts, So the does the CPU315-2DP (6ES7 315-2AG10-0AB0 firmware 2.0) support modbus TCP/IP comunicate to DCS system ? And which module can support my CPU312-2DP?

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Joined: 10/3/2008

Last visit: 10/22/2025

Posts: 996

Rating:

(129)

Yes, with this CPU you can use "Modbus/TCP CP V5.0" (not V6.0).
Have a look at the link above. There is a list of possible CPs:

4/6/2024 2:51 AM	Rate (0)
anh232 Joined: 3/21/2023 Last visit: 5/10/2025 Posts: 4 Rating: (0)	Can you give me the link to download library of modbus tcp/ip block used to the cp343-1 in the list?

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4/6/2024 2:15 PM	Rate (0)
Wüstenräuber Gold Expert Joined: 10/3/2008 Last visit: 10/22/2025 Posts: 996 Rating: (129)	Here you can download the previous version: https://support.industry.siemens.com/cs/ww/en/view/109752686

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