Siemens S7-300 PLC as a Modbus TCP Slave or Master

Just to close the topic, I finally did find the links to the examples. Looks like a S7 can talk Modbus TCP as a client in these examples. Thanks Oleg!

http://msx-box.blogspirit.com/archive/2007/03/21/simatic®-s7-steuert-die-msx-box-–-das-beispiel.html

http://msx-box.blogspirit.com/files/modbusTC_read_8dig_inp.2.zip

http://msx-box.blogspirit.com/files/modbusTC_set8_dig_out.2.zip

dear sir.
Siemens S7 315-2PN/DP(profinet version) can support Modbus TCP protocol by OPEN IE way!
best regards.

zhonghua from shanghai yamato scale co.,limit <[email protected]>

Yes, Siemens offer a software package 2XV9 450-1MB00 to connect it with the Modbus-tcp network.