Hello!
Tell me, do I understand correctly that the Unitronics v570 controller, configured to communicate via Modbus with SCADA as a “Slave”, can connect via Modbus to only one server (SCADA - WinCC v7.3)?
We use two redundant servers (master) in SCADA. The configuration of the device connected via Modbus on both servers must be the same, the connection state on both must be the same, otherwise the redundancy of the servers is lost, which is unacceptable.
At the same time, many other controllers integrated into SCADA via Modbus successfully connect to both servers, only Unitronics v570 connects to the one that polls first.