Can't connect to s7-300

Ignition
1

hello,
I'm having problems connecting a PLC, it is a siemens s7-300. I have to connect 3 PLCs, I have been able to connect one without problems, the other two do not work.

the three plc are in the same network. and they are configured in the same way. only one works with Ignition.

the rack and slot number is correct, port 102 is open and I have disabled the firewall.

Has anyone experienced something similar? What do I have to look at in the PLCs configuration? I am using STEP7.

thank you

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the logs:

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java.net.SocketException: Connection reset

at java.base/java.net.SocketInputStream.read(Unknown Source)

at java.base/java.net.SocketInputStream.read(Unknown Source)

at java.base/java.net.SocketInputStream.read(Unknown Source)

at com.inductiveautomation.iosession.socket.AsyncSocketIOSession.run(AsyncSocketIOSession.java:71)

at java.base/java.lang.Thread.run(Unknown Source)```
2

That is the target device saying "I'm too busy" or "I'm not configured to do this". IIRC, you must explicitly configure (in the PLC) the number of get/put connections that will be allowed. If other systems are also connecting, someone will be refused.

1 Like
3

Thanks, I tried connecting the plcs with Kepserver and it gives me the same problem, with that I rule out that it is something related to the Ignition driver.

I am going to check the communications configuration in the PLCs.

thanks again.

4

TIA or Step7?
I know in TIA the OPC has to be turned on - there are 2 ways of doing it as well. Also, it pesters you if you don't set up security - if everything is not set just right it defaults to 'I'm not working".....

Good luck :slight_smile: