We also, checked do not use router as it is not required since our tech support gateway is on the same subnet as our development PC that is running the Step 7 development software. We changed the IP address to match that of our technical support gateway, and the subnet mask must be the same as the technical support gateway subnet. Record the IP address and Router address if it is used before making changes. Click on the properties box as shown below: We are going to temporarily change the IP address in the project only, and then restore it later after we finish this session. This opens the Properties box for this ethernet module. Then double click on the etherne module as shown below: Next open the Siemens project and find the Hardware configuration line as shown and by double clicking open the Hardware configuration screen. We entered the Field Device TCP Port number 102 which was found by clicking on, “ Click for a list of common TCP Ports” shown on the “Manage My Remote” screen, and we entered the hardware configured IP address of the PLC as 10.0.5.15 in the Field Device IP Address box. First login to your web page “Manage My Remote” on the website.
The PLC resided on a private 10.0.5.x subnet using a CP 343-1 ethernet module. This is a remote connection session to a Siemens S7-300 PLC on Ethernet using Siemens Step 7 Simatic Software.
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