Simatic TCP Communication "Fetch passive" "Write passive"

32/64 bit multi-platform Ethernet S7 PLC communication suite

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Simatic TCP Communication "Fetch passive" "Write passive"

Forum: General Discussion

Creator: Kaloyan Preslavski

Created: 2017-07-07

Updated: 2017-07-07

Kaloyan Preslavski - 2017-07-07

Hello,

I am new to snap7. Reading the documentation, i didn't quite understand how to connect to a PLC with following parameters:
2 connections with connection type "TCP Connection" with no active partner. One is for "fetch passive" with <local address="">:<local port=""> and one for "write passive" <local address="">:<local port="">. Could you throw me some hints(which API) how to achieve this? </local></local></local></local>

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Davide Nardella - 2017-07-07

There is no fetch/write.
The communication is handled by the firmware of the CPU, you don't need of configuring anything.
Have a look to the examples.

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Kaloyan Preslavski - 2017-07-07

I am trying so simulate PLC and create a server with such "behaviour". PLC settings are set like this.

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Davide Nardella - 2017-07-07

Have a look at S7Server

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