I tested about modbus tcp driver today.
When I set active for one device. The device got two connection number.
Why WinCC OA need two connection for one device active ?
Is there any way to get one connection ? We are only read from the device.
Number of connection count of Modbus TCP Driver
- dongil
- Posts:49
- Joined: Mon Oct 07, 2013 3:42 am
Number of connection count of Modbus TCP Driver
- dongil
- Posts:49
- Joined: Mon Oct 07, 2013 3:42 am
Re: Number of connection count of Modbus TCP Driver
WinCC OA version is 3.15.
I tested it.
I have no idea why.. but some time it got one connection. sometimes it got 2 connection.
can you give me a answer why?
I tested it.
I have no idea why.. but some time it got one connection. sometimes it got 2 connection.
can you give me a answer why?
- gschijndel
- Posts:376
- Joined: Tue Jan 15, 2019 3:12 pm
Re: Number of connection count of Modbus TCP Driver
With the default settings both servers of a redundant system will connect to the device.
At the Modbus PLC configuration you can configure that only the active server should connect to the PLC with the setting 'Only active driver'.
At the Modbus PLC configuration you can configure that only the active server should connect to the PLC with the setting 'Only active driver'.