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Delphi ModbusTCP components
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Siemens S7-1200 connection problem #22

Open ertankucukoglu opened 6 years ago

ertankucukoglu commented 6 years ago

Hello,

Using Delphi 10.2 with 1.6.7 version of the library. I have Indy 10.6.2.5366 installed.

I am using Indy10 ModbusMaster demo application to test a connection and I constantly receive socket error 10061 connection refused.

I have installed Modbus Slave application of Witte Software in demo mode to make a test connection and that application can connect to PLC device just fine on same computer and apparently same settings.

Is there any known issues with siemens PLC devices?

Thanks.

ertankucukoglu commented 6 years ago

After working on the problem. It turns out that I need to set TIdModbusClient.BoundPort to 502 for connection to be established fine. However, when I do that, I start to receive Address already in use error messages if I am to close and open the demo application.